rasd: Sdd format read & parse from the kernel files
Added in order to have a stand-alone build. Ultimately
rasd will need to link the traceevent lib from the kernel.
Files copied from:
. tools/lib/traceevent/event-parse.h,
. tools/lib/traceevent/event-parse.c,
. include/linux/trace_seq.h,
. tools/lib/traceevent/trace-seq.c.
and adapted for the build to succeed.
Signed-off-by: Jean Pihet <jean.pihet@linaro.org>
Link: http://lkml.kernel.org/r/1412933690-25576-8-git-send-email-jean.pihet@linaro.org
Signed-off-by: Borislav Petkov <bp@suse.de>
diff --git a/include/event-parse.h b/include/event-parse.h
new file mode 100644
index 0000000..476fd20
--- /dev/null
+++ b/include/event-parse.h
@@ -0,0 +1,946 @@
+/* Copied from tools/lib/traceevent/event-parse.h and adapted to rasd */
+
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License (not later!)
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#ifndef _PARSE_EVENTS_H
+#define _PARSE_EVENTS_H
+
+#include <stdbool.h>
+#include <stdarg.h>
+#include <regex.h>
+#include <string.h>
+
+#ifndef __maybe_unused
+#define __maybe_unused __attribute__((unused))
+#endif
+
+/* ----------------------- trace_seq ----------------------- */
+
+
+#ifndef TRACE_SEQ_BUF_SIZE
+#define TRACE_SEQ_BUF_SIZE 4096
+#endif
+
+#ifndef DEBUG_RECORD
+#define DEBUG_RECORD 0
+#endif
+
+struct pevent_record {
+ unsigned long long ts;
+ unsigned long long offset;
+ long long missed_events; /* buffer dropped events before */
+ int record_size; /* size of binary record */
+ int size; /* size of data */
+ void *data;
+ int cpu;
+ int ref_count;
+ int locked; /* Do not free, even if ref_count is zero */
+ void *priv;
+#if DEBUG_RECORD
+ struct pevent_record *prev;
+ struct pevent_record *next;
+ long alloc_addr;
+#endif
+};
+
+enum trace_seq_fail {
+ TRACE_SEQ__GOOD,
+ TRACE_SEQ__BUFFER_POISONED,
+ TRACE_SEQ__MEM_ALLOC_FAILED,
+};
+
+/*
+ * Trace sequences are used to allow a function to call several other functions
+ * to create a string of data to use (up to a max of PAGE_SIZE).
+ */
+
+struct trace_seq {
+ char *buffer;
+ unsigned int buffer_size;
+ unsigned int len;
+ unsigned int readpos;
+ enum trace_seq_fail state;
+};
+
+void trace_seq_init(struct trace_seq *s);
+void trace_seq_reset(struct trace_seq *s);
+void trace_seq_destroy(struct trace_seq *s);
+
+extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
+ __attribute__ ((format (printf, 2, 3)));
+extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
+ __attribute__ ((format (printf, 2, 0)));
+
+extern int trace_seq_puts(struct trace_seq *s, const char *str);
+extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
+
+extern void trace_seq_terminate(struct trace_seq *s);
+
+extern int trace_seq_do_printf(struct trace_seq *s);
+
+
+/* ----------------------- pevent ----------------------- */
+
+struct pevent;
+struct event_format;
+
+typedef int (*pevent_event_handler_func)(struct trace_seq *s,
+ struct pevent_record *record,
+ struct event_format *event,
+ void *context);
+
+typedef int (*pevent_plugin_load_func)(struct pevent *pevent);
+typedef int (*pevent_plugin_unload_func)(struct pevent *pevent);
+
+struct pevent_plugin_option {
+ struct pevent_plugin_option *next;
+ void *handle;
+ char *file;
+ char *name;
+ char *plugin_alias;
+ char *description;
+ char *value;
+ void *priv;
+ int set;
+};
+
+/*
+ * Plugin hooks that can be called:
+ *
+ * PEVENT_PLUGIN_LOADER: (required)
+ * The function name to initialized the plugin.
+ *
+ * int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
+ *
+ * PEVENT_PLUGIN_UNLOADER: (optional)
+ * The function called just before unloading
+ *
+ * int PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
+ *
+ * PEVENT_PLUGIN_OPTIONS: (optional)
+ * Plugin options that can be set before loading
+ *
+ * struct pevent_plugin_option PEVENT_PLUGIN_OPTIONS[] = {
+ * {
+ * .name = "option-name",
+ * .plugin_alias = "overide-file-name", (optional)
+ * .description = "description of option to show users",
+ * },
+ * {
+ * .name = NULL,
+ * },
+ * };
+ *
+ * Array must end with .name = NULL;
+ *
+ *
+ * .plugin_alias is used to give a shorter name to access
+ * the vairable. Useful if a plugin handles more than one event.
+ *
+ * PEVENT_PLUGIN_ALIAS: (optional)
+ * The name to use for finding options (uses filename if not defined)
+ */
+#define PEVENT_PLUGIN_LOADER pevent_plugin_loader
+#define PEVENT_PLUGIN_UNLOADER pevent_plugin_unloader
+#define PEVENT_PLUGIN_OPTIONS pevent_plugin_options
+#define PEVENT_PLUGIN_ALIAS pevent_plugin_alias
+#define _MAKE_STR(x) #x
+#define MAKE_STR(x) _MAKE_STR(x)
+#define PEVENT_PLUGIN_LOADER_NAME MAKE_STR(PEVENT_PLUGIN_LOADER)
+#define PEVENT_PLUGIN_UNLOADER_NAME MAKE_STR(PEVENT_PLUGIN_UNLOADER)
+#define PEVENT_PLUGIN_OPTIONS_NAME MAKE_STR(PEVENT_PLUGIN_OPTIONS)
+#define PEVENT_PLUGIN_ALIAS_NAME MAKE_STR(PEVENT_PLUGIN_ALIAS)
+
+#define NSECS_PER_SEC 1000000000ULL
+#define NSECS_PER_USEC 1000ULL
+
+enum format_flags {
+ FIELD_IS_ARRAY = 1,
+ FIELD_IS_POINTER = 2,
+ FIELD_IS_SIGNED = 4,
+ FIELD_IS_STRING = 8,
+ FIELD_IS_DYNAMIC = 16,
+ FIELD_IS_LONG = 32,
+ FIELD_IS_FLAG = 64,
+ FIELD_IS_SYMBOLIC = 128,
+};
+
+struct format_field {
+ struct format_field *next;
+ struct event_format *event;
+ char *type;
+ char *name;
+ int offset;
+ int size;
+ unsigned int arraylen;
+ unsigned int elementsize;
+ unsigned long flags;
+};
+
+struct format {
+ int nr_common;
+ int nr_fields;
+ struct format_field *common_fields;
+ struct format_field *fields;
+};
+
+struct print_arg_atom {
+ char *atom;
+};
+
+struct print_arg_string {
+ char *string;
+ int offset;
+};
+
+struct print_arg_bitmask {
+ char *bitmask;
+ int offset;
+};
+
+struct print_arg_field {
+ char *name;
+ struct format_field *field;
+};
+
+struct print_flag_sym {
+ struct print_flag_sym *next;
+ char *value;
+ char *str;
+};
+
+struct print_arg_typecast {
+ char *type;
+ struct print_arg *item;
+};
+
+struct print_arg_flags {
+ struct print_arg *field;
+ char *delim;
+ struct print_flag_sym *flags;
+};
+
+struct print_arg_symbol {
+ struct print_arg *field;
+ struct print_flag_sym *symbols;
+};
+
+struct print_arg_hex {
+ struct print_arg *field;
+ struct print_arg *size;
+};
+
+struct print_arg_dynarray {
+ struct format_field *field;
+ struct print_arg *index;
+};
+
+struct print_arg;
+
+struct print_arg_op {
+ char *op;
+ int prio;
+ struct print_arg *left;
+ struct print_arg *right;
+};
+
+struct pevent_function_handler;
+
+struct print_arg_func {
+ struct pevent_function_handler *func;
+ struct print_arg *args;
+};
+
+enum print_arg_type {
+ PRINT_NULL,
+ PRINT_ATOM,
+ PRINT_FIELD,
+ PRINT_FLAGS,
+ PRINT_SYMBOL,
+ PRINT_HEX,
+ PRINT_TYPE,
+ PRINT_STRING,
+ PRINT_BSTRING,
+ PRINT_DYNAMIC_ARRAY,
+ PRINT_OP,
+ PRINT_FUNC,
+ PRINT_BITMASK,
+};
+
+struct print_arg {
+ struct print_arg *next;
+ enum print_arg_type type;
+ union {
+ struct print_arg_atom atom;
+ struct print_arg_field field;
+ struct print_arg_typecast typecast;
+ struct print_arg_flags flags;
+ struct print_arg_symbol symbol;
+ struct print_arg_hex hex;
+ struct print_arg_func func;
+ struct print_arg_string string;
+ struct print_arg_bitmask bitmask;
+ struct print_arg_op op;
+ struct print_arg_dynarray dynarray;
+ };
+};
+
+struct print_fmt {
+ char *format;
+ struct print_arg *args;
+};
+
+struct event_format {
+ struct pevent *pevent;
+ char *name;
+ int id;
+ int flags;
+ struct format format;
+ struct print_fmt print_fmt;
+ char *system;
+ pevent_event_handler_func handler;
+ void *context;
+};
+
+enum {
+ EVENT_FL_ISFTRACE = 0x01,
+ EVENT_FL_ISPRINT = 0x02,
+ EVENT_FL_ISBPRINT = 0x04,
+ EVENT_FL_ISFUNCENT = 0x10,
+ EVENT_FL_ISFUNCRET = 0x20,
+ EVENT_FL_NOHANDLE = 0x40,
+ EVENT_FL_PRINTRAW = 0x80,
+
+ EVENT_FL_FAILED = 0x80000000
+};
+
+enum event_sort_type {
+ EVENT_SORT_ID,
+ EVENT_SORT_NAME,
+ EVENT_SORT_SYSTEM,
+};
+
+enum event_type {
+ EVENT_ERROR,
+ EVENT_NONE,
+ EVENT_SPACE,
+ EVENT_NEWLINE,
+ EVENT_OP,
+ EVENT_DELIM,
+ EVENT_ITEM,
+ EVENT_DQUOTE,
+ EVENT_SQUOTE,
+};
+
+typedef unsigned long long (*pevent_func_handler)(struct trace_seq *s,
+ unsigned long long *args);
+
+enum pevent_func_arg_type {
+ PEVENT_FUNC_ARG_VOID,
+ PEVENT_FUNC_ARG_INT,
+ PEVENT_FUNC_ARG_LONG,
+ PEVENT_FUNC_ARG_STRING,
+ PEVENT_FUNC_ARG_PTR,
+ PEVENT_FUNC_ARG_MAX_TYPES
+};
+
+enum pevent_flag {
+ PEVENT_NSEC_OUTPUT = 1, /* output in NSECS */
+ PEVENT_DISABLE_SYS_PLUGINS = 1 << 1,
+ PEVENT_DISABLE_PLUGINS = 1 << 2,
+};
+
+#define PEVENT_ERRORS \
+ _PE(MEM_ALLOC_FAILED, "failed to allocate memory"), \
+ _PE(PARSE_EVENT_FAILED, "failed to parse event"), \
+ _PE(READ_ID_FAILED, "failed to read event id"), \
+ _PE(READ_FORMAT_FAILED, "failed to read event format"), \
+ _PE(READ_PRINT_FAILED, "failed to read event print fmt"), \
+ _PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
+ _PE(INVALID_ARG_TYPE, "invalid argument type"), \
+ _PE(INVALID_EXP_TYPE, "invalid expression type"), \
+ _PE(INVALID_OP_TYPE, "invalid operator type"), \
+ _PE(INVALID_EVENT_NAME, "invalid event name"), \
+ _PE(EVENT_NOT_FOUND, "no event found"), \
+ _PE(SYNTAX_ERROR, "syntax error"), \
+ _PE(ILLEGAL_RVALUE, "illegal rvalue"), \
+ _PE(ILLEGAL_LVALUE, "illegal lvalue for string comparison"), \
+ _PE(INVALID_REGEX, "regex did not compute"), \
+ _PE(ILLEGAL_STRING_CMP, "illegal comparison for string"), \
+ _PE(ILLEGAL_INTEGER_CMP,"illegal comparison for integer"), \
+ _PE(REPARENT_NOT_OP, "cannot reparent other than OP"), \
+ _PE(REPARENT_FAILED, "failed to reparent filter OP"), \
+ _PE(BAD_FILTER_ARG, "bad arg in filter tree"), \
+ _PE(UNEXPECTED_TYPE, "unexpected type (not a value)"), \
+ _PE(ILLEGAL_TOKEN, "illegal token"), \
+ _PE(INVALID_PAREN, "open parenthesis cannot come here"), \
+ _PE(UNBALANCED_PAREN, "unbalanced number of parenthesis"), \
+ _PE(UNKNOWN_TOKEN, "unknown token"), \
+ _PE(FILTER_NOT_FOUND, "no filter found"), \
+ _PE(NOT_A_NUMBER, "must have number field"), \
+ _PE(NO_FILTER, "no filters exists"), \
+ _PE(FILTER_MISS, "record does not match to filter")
+
+#undef _PE
+#define _PE(__code, __str) PEVENT_ERRNO__ ## __code
+enum pevent_errno {
+ PEVENT_ERRNO__SUCCESS = 0,
+ PEVENT_ERRNO__FILTER_MATCH = PEVENT_ERRNO__SUCCESS,
+
+ /*
+ * Choose an arbitrary negative big number not to clash with standard
+ * errno since SUS requires the errno has distinct positive values.
+ * See 'Issue 6' in the link below.
+ *
+ * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
+ */
+ __PEVENT_ERRNO__START = -100000,
+
+ PEVENT_ERRORS,
+
+ __PEVENT_ERRNO__END,
+};
+#undef _PE
+
+struct plugin_list;
+
+#define INVALID_PLUGIN_LIST_OPTION ((char **)((unsigned long)-1))
+
+struct plugin_list *traceevent_load_plugins(struct pevent *pevent);
+void traceevent_unload_plugins(struct plugin_list *plugin_list,
+ struct pevent *pevent);
+char **traceevent_plugin_list_options(void);
+void traceevent_plugin_free_options_list(char **list);
+int traceevent_plugin_add_options(const char *name,
+ struct pevent_plugin_option *options);
+void traceevent_plugin_remove_options(struct pevent_plugin_option *options);
+void traceevent_print_plugins(struct trace_seq *s,
+ const char *prefix, const char *suffix,
+ const struct plugin_list *list);
+
+struct cmdline;
+struct cmdline_list;
+struct func_map;
+struct func_list;
+struct event_handler;
+
+struct pevent {
+ int ref_count;
+
+ int header_page_ts_offset;
+ int header_page_ts_size;
+ int header_page_size_offset;
+ int header_page_size_size;
+ int header_page_data_offset;
+ int header_page_data_size;
+ int header_page_overwrite;
+
+ int file_bigendian;
+ int host_bigendian;
+
+ int latency_format;
+
+ int old_format;
+
+ int cpus;
+ int long_size;
+ int page_size;
+
+ struct cmdline *cmdlines;
+ struct cmdline_list *cmdlist;
+ int cmdline_count;
+
+ struct func_map *func_map;
+ struct func_list *funclist;
+ unsigned int func_count;
+
+ struct printk_map *printk_map;
+ struct printk_list *printklist;
+ unsigned int printk_count;
+
+
+ struct event_format **events;
+ int nr_events;
+ struct event_format **sort_events;
+ enum event_sort_type last_type;
+
+ int type_offset;
+ int type_size;
+
+ int pid_offset;
+ int pid_size;
+
+ int pc_offset;
+ int pc_size;
+
+ int flags_offset;
+ int flags_size;
+
+ int ld_offset;
+ int ld_size;
+
+ int print_raw;
+
+ int test_filters;
+
+ int flags;
+
+ struct format_field *bprint_ip_field;
+ struct format_field *bprint_fmt_field;
+ struct format_field *bprint_buf_field;
+
+ struct event_handler *handlers;
+ struct pevent_function_handler *func_handlers;
+
+ /* cache */
+ struct event_format *last_event;
+
+ char *trace_clock;
+};
+
+static inline void pevent_set_flag(struct pevent *pevent, int flag)
+{
+ pevent->flags |= flag;
+}
+
+static inline unsigned short
+__data2host2(struct pevent *pevent, unsigned short data)
+{
+ unsigned short swap;
+
+ if (pevent->host_bigendian == pevent->file_bigendian)
+ return data;
+
+ swap = ((data & 0xffULL) << 8) |
+ ((data & (0xffULL << 8)) >> 8);
+
+ return swap;
+}
+
+static inline unsigned int
+__data2host4(struct pevent *pevent, unsigned int data)
+{
+ unsigned int swap;
+
+ if (pevent->host_bigendian == pevent->file_bigendian)
+ return data;
+
+ swap = ((data & 0xffULL) << 24) |
+ ((data & (0xffULL << 8)) << 8) |
+ ((data & (0xffULL << 16)) >> 8) |
+ ((data & (0xffULL << 24)) >> 24);
+
+ return swap;
+}
+
+static inline unsigned long long
+__data2host8(struct pevent *pevent, unsigned long long data)
+{
+ unsigned long long swap;
+
+ if (pevent->host_bigendian == pevent->file_bigendian)
+ return data;
+
+ swap = ((data & 0xffULL) << 56) |
+ ((data & (0xffULL << 8)) << 40) |
+ ((data & (0xffULL << 16)) << 24) |
+ ((data & (0xffULL << 24)) << 8) |
+ ((data & (0xffULL << 32)) >> 8) |
+ ((data & (0xffULL << 40)) >> 24) |
+ ((data & (0xffULL << 48)) >> 40) |
+ ((data & (0xffULL << 56)) >> 56);
+
+ return swap;
+}
+
+#define data2host2(pevent, ptr) __data2host2(pevent, *(unsigned short *)(ptr))
+#define data2host4(pevent, ptr) __data2host4(pevent, *(unsigned int *)(ptr))
+#define data2host8(pevent, ptr) \
+({ \
+ unsigned long long __val; \
+ \
+ memcpy(&__val, (ptr), sizeof(unsigned long long)); \
+ __data2host8(pevent, __val); \
+})
+
+static inline int traceevent_host_bigendian(void)
+{
+ unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
+ unsigned int val;
+
+ memcpy(&val, str, 4);
+ return val == 0x01020304;
+}
+
+/* taken from kernel/trace/trace.h */
+enum trace_flag_type {
+ TRACE_FLAG_IRQS_OFF = 0x01,
+ TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
+ TRACE_FLAG_NEED_RESCHED = 0x04,
+ TRACE_FLAG_HARDIRQ = 0x08,
+ TRACE_FLAG_SOFTIRQ = 0x10,
+};
+
+int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
+void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock);
+int pevent_register_function(struct pevent *pevent, char *name,
+ unsigned long long addr, char *mod);
+int pevent_register_print_string(struct pevent *pevent, const char *fmt,
+ unsigned long long addr);
+int pevent_pid_is_registered(struct pevent *pevent, int pid);
+
+void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
+ struct pevent_record *record, bool use_trace_clock);
+
+int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
+ int long_size);
+
+enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
+ unsigned long size, const char *sys);
+enum pevent_errno pevent_parse_format(struct pevent *pevent,
+ struct event_format **eventp,
+ const char *buf,
+ unsigned long size, const char *sys);
+void pevent_free_format(struct event_format *event);
+
+void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
+ const char *name, struct pevent_record *record,
+ int *len, int err);
+
+int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
+ const char *name, struct pevent_record *record,
+ unsigned long long *val, int err);
+int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
+ const char *name, struct pevent_record *record,
+ unsigned long long *val, int err);
+int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
+ const char *name, struct pevent_record *record,
+ unsigned long long *val, int err);
+
+int pevent_print_num_field(struct trace_seq *s, const char *fmt,
+ struct event_format *event, const char *name,
+ struct pevent_record *record, int err);
+
+int pevent_print_func_field(struct trace_seq *s, const char *fmt,
+ struct event_format *event, const char *name,
+ struct pevent_record *record, int err);
+
+int pevent_register_event_handler(struct pevent *pevent, int id,
+ const char *sys_name, const char *event_name,
+ pevent_event_handler_func func, void *context);
+int pevent_unregister_event_handler(struct pevent *pevent, int id,
+ const char *sys_name, const char *event_name,
+ pevent_event_handler_func func, void *context);
+int pevent_register_print_function(struct pevent *pevent,
+ pevent_func_handler func,
+ enum pevent_func_arg_type ret_type,
+ char *name, ...);
+int pevent_unregister_print_function(struct pevent *pevent,
+ pevent_func_handler func, char *name);
+
+struct format_field *pevent_find_common_field(struct event_format *event, const char *name);
+struct format_field *pevent_find_field(struct event_format *event, const char *name);
+struct format_field *pevent_find_any_field(struct event_format *event, const char *name);
+
+const char *pevent_find_function(struct pevent *pevent, unsigned long long addr);
+unsigned long long
+pevent_find_function_address(struct pevent *pevent, unsigned long long addr);
+unsigned long long pevent_read_number(struct pevent *pevent, const void *ptr, int size);
+int pevent_read_number_field(struct format_field *field, const void *data,
+ unsigned long long *value);
+
+struct event_format *pevent_find_event(struct pevent *pevent, int id);
+
+struct event_format *
+pevent_find_event_by_name(struct pevent *pevent, const char *sys, const char *name);
+
+void pevent_data_lat_fmt(struct pevent *pevent,
+ struct trace_seq *s, struct pevent_record *record);
+int pevent_data_type(struct pevent *pevent, struct pevent_record *rec);
+struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type);
+int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
+const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
+void pevent_event_info(struct trace_seq *s, struct event_format *event,
+ struct pevent_record *record);
+int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
+ char *buf, size_t buflen);
+
+struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type);
+struct format_field **pevent_event_common_fields(struct event_format *event);
+struct format_field **pevent_event_fields(struct event_format *event);
+
+static inline int pevent_get_cpus(struct pevent *pevent)
+{
+ return pevent->cpus;
+}
+
+static inline void pevent_set_cpus(struct pevent *pevent, int cpus)
+{
+ pevent->cpus = cpus;
+}
+
+static inline int pevent_get_long_size(struct pevent *pevent)
+{
+ return pevent->long_size;
+}
+
+static inline void pevent_set_long_size(struct pevent *pevent, int long_size)
+{
+ pevent->long_size = long_size;
+}
+
+static inline int pevent_get_page_size(struct pevent *pevent)
+{
+ return pevent->page_size;
+}
+
+static inline void pevent_set_page_size(struct pevent *pevent, int _page_size)
+{
+ pevent->page_size = _page_size;
+}
+
+static inline int pevent_is_file_bigendian(struct pevent *pevent)
+{
+ return pevent->file_bigendian;
+}
+
+static inline void pevent_set_file_bigendian(struct pevent *pevent, int endian)
+{
+ pevent->file_bigendian = endian;
+}
+
+static inline int pevent_is_host_bigendian(struct pevent *pevent)
+{
+ return pevent->host_bigendian;
+}
+
+static inline void pevent_set_host_bigendian(struct pevent *pevent, int endian)
+{
+ pevent->host_bigendian = endian;
+}
+
+static inline int pevent_is_latency_format(struct pevent *pevent)
+{
+ return pevent->latency_format;
+}
+
+static inline void pevent_set_latency_format(struct pevent *pevent, int lat)
+{
+ pevent->latency_format = lat;
+}
+
+struct pevent *pevent_alloc(void);
+void pevent_free(struct pevent *pevent);
+void pevent_ref(struct pevent *pevent);
+void pevent_unref(struct pevent *pevent);
+
+/* access to the internal parser */
+void pevent_buffer_init(const char *buf, unsigned long long size);
+enum event_type pevent_read_token(char **tok);
+void pevent_free_token(char *token);
+int pevent_peek_char(void);
+const char *pevent_get_input_buf(void);
+unsigned long long pevent_get_input_buf_ptr(void);
+
+/* for debugging */
+void pevent_print_funcs(struct pevent *pevent);
+void pevent_print_printk(struct pevent *pevent);
+
+/* ----------------------- filtering ----------------------- */
+
+enum filter_boolean_type {
+ FILTER_FALSE,
+ FILTER_TRUE,
+};
+
+enum filter_op_type {
+ FILTER_OP_AND = 1,
+ FILTER_OP_OR,
+ FILTER_OP_NOT,
+};
+
+enum filter_cmp_type {
+ FILTER_CMP_NONE,
+ FILTER_CMP_EQ,
+ FILTER_CMP_NE,
+ FILTER_CMP_GT,
+ FILTER_CMP_LT,
+ FILTER_CMP_GE,
+ FILTER_CMP_LE,
+ FILTER_CMP_MATCH,
+ FILTER_CMP_NOT_MATCH,
+ FILTER_CMP_REGEX,
+ FILTER_CMP_NOT_REGEX,
+};
+
+enum filter_exp_type {
+ FILTER_EXP_NONE,
+ FILTER_EXP_ADD,
+ FILTER_EXP_SUB,
+ FILTER_EXP_MUL,
+ FILTER_EXP_DIV,
+ FILTER_EXP_MOD,
+ FILTER_EXP_RSHIFT,
+ FILTER_EXP_LSHIFT,
+ FILTER_EXP_AND,
+ FILTER_EXP_OR,
+ FILTER_EXP_XOR,
+ FILTER_EXP_NOT,
+};
+
+enum filter_arg_type {
+ FILTER_ARG_NONE,
+ FILTER_ARG_BOOLEAN,
+ FILTER_ARG_VALUE,
+ FILTER_ARG_FIELD,
+ FILTER_ARG_EXP,
+ FILTER_ARG_OP,
+ FILTER_ARG_NUM,
+ FILTER_ARG_STR,
+};
+
+enum filter_value_type {
+ FILTER_NUMBER,
+ FILTER_STRING,
+ FILTER_CHAR
+};
+
+struct fliter_arg;
+
+struct filter_arg_boolean {
+ enum filter_boolean_type value;
+};
+
+struct filter_arg_field {
+ struct format_field *field;
+};
+
+struct filter_arg_value {
+ enum filter_value_type type;
+ union {
+ char *str;
+ unsigned long long val;
+ };
+};
+
+struct filter_arg_op {
+ enum filter_op_type type;
+ struct filter_arg *left;
+ struct filter_arg *right;
+};
+
+struct filter_arg_exp {
+ enum filter_exp_type type;
+ struct filter_arg *left;
+ struct filter_arg *right;
+};
+
+struct filter_arg_num {
+ enum filter_cmp_type type;
+ struct filter_arg *left;
+ struct filter_arg *right;
+};
+
+struct filter_arg_str {
+ enum filter_cmp_type type;
+ struct format_field *field;
+ char *val;
+ char *buffer;
+ regex_t reg;
+};
+
+struct filter_arg {
+ enum filter_arg_type type;
+ union {
+ struct filter_arg_boolean boolean;
+ struct filter_arg_field field;
+ struct filter_arg_value value;
+ struct filter_arg_op op;
+ struct filter_arg_exp exp;
+ struct filter_arg_num num;
+ struct filter_arg_str str;
+ };
+};
+
+struct filter_type {
+ int event_id;
+ struct event_format *event;
+ struct filter_arg *filter;
+};
+
+#define PEVENT_FILTER_ERROR_BUFSZ 1024
+
+struct event_filter {
+ struct pevent *pevent;
+ int filters;
+ struct filter_type *event_filters;
+ char error_buffer[PEVENT_FILTER_ERROR_BUFSZ];
+};
+
+struct event_filter *pevent_filter_alloc(struct pevent *pevent);
+
+/* for backward compatibility */
+#define FILTER_NONE PEVENT_ERRNO__NO_FILTER
+#define FILTER_NOEXIST PEVENT_ERRNO__FILTER_NOT_FOUND
+#define FILTER_MISS PEVENT_ERRNO__FILTER_MISS
+#define FILTER_MATCH PEVENT_ERRNO__FILTER_MATCH
+
+enum filter_trivial_type {
+ FILTER_TRIVIAL_FALSE,
+ FILTER_TRIVIAL_TRUE,
+ FILTER_TRIVIAL_BOTH,
+};
+
+enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter,
+ const char *filter_str);
+
+enum pevent_errno pevent_filter_match(struct event_filter *filter,
+ struct pevent_record *record);
+
+int pevent_filter_strerror(struct event_filter *filter, enum pevent_errno err,
+ char *buf, size_t buflen);
+
+int pevent_event_filtered(struct event_filter *filter,
+ int event_id);
+
+void pevent_filter_reset(struct event_filter *filter);
+
+int pevent_filter_clear_trivial(struct event_filter *filter,
+ enum filter_trivial_type type);
+
+void pevent_filter_free(struct event_filter *filter);
+
+char *pevent_filter_make_string(struct event_filter *filter, int event_id);
+
+int pevent_filter_remove_event(struct event_filter *filter,
+ int event_id);
+
+int pevent_filter_event_has_trivial(struct event_filter *filter,
+ int event_id,
+ enum filter_trivial_type type);
+
+int pevent_filter_copy(struct event_filter *dest, struct event_filter *source);
+
+int pevent_update_trivial(struct event_filter *dest, struct event_filter *source,
+ enum filter_trivial_type type);
+
+int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2);
+
+#endif /* _PARSE_EVENTS_H */
diff --git a/include/ras.h b/include/ras.h
index 5eb47bc..53d41f0 100644
--- a/include/ras.h
+++ b/include/ras.h
@@ -5,7 +5,6 @@
* Put stuff from perf.h here so as not to copy *everything* over
*/
-#define _GNU_SOURCE
#include <assert.h>
#include <dirent.h>
#include <errno.h>
diff --git a/include/trace_seq.h b/include/trace_seq.h
new file mode 100644
index 0000000..a711deb
--- /dev/null
+++ b/include/trace_seq.h
@@ -0,0 +1,109 @@
+/* Copied from include/linux/trace_seq.h */
+
+#ifndef _LINUX_TRACE_SEQ_H
+#define _LINUX_TRACE_SEQ_H
+
+#include <linux/fs.h>
+
+#include <asm/page.h>
+
+/*
+ * Trace sequences are used to allow a function to call several other functions
+ * to create a string of data to use (up to a max of PAGE_SIZE).
+ */
+
+struct trace_seq {
+ unsigned char buffer[PAGE_SIZE];
+ unsigned int len;
+ unsigned int readpos;
+ int full;
+};
+
+static inline void
+trace_seq_init(struct trace_seq *s)
+{
+ s->len = 0;
+ s->readpos = 0;
+ s->full = 0;
+}
+
+/*
+ * Currently only defined when tracing is enabled.
+ */
+#ifdef CONFIG_TRACING
+extern __printf(2, 3)
+int trace_seq_printf(struct trace_seq *s, const char *fmt, ...);
+extern __printf(2, 0)
+int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args);
+extern int
+trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
+extern int trace_print_seq(struct seq_file *m, struct trace_seq *s);
+extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
+ size_t cnt);
+extern int trace_seq_puts(struct trace_seq *s, const char *str);
+extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
+extern int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len);
+extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
+ size_t len);
+extern void *trace_seq_reserve(struct trace_seq *s, size_t len);
+extern int trace_seq_path(struct trace_seq *s, const struct path *path);
+
+extern int trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
+ int nmaskbits);
+
+#else /* CONFIG_TRACING */
+static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
+{
+ return 0;
+}
+static inline int
+trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
+{
+ return 0;
+}
+
+static inline int
+trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
+ int nmaskbits)
+{
+ return 0;
+}
+
+static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s)
+{
+ return 0;
+}
+static inline ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
+ size_t cnt)
+{
+ return 0;
+}
+static inline int trace_seq_puts(struct trace_seq *s, const char *str)
+{
+ return 0;
+}
+static inline int trace_seq_putc(struct trace_seq *s, unsigned char c)
+{
+ return 0;
+}
+static inline int
+trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
+{
+ return 0;
+}
+static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
+ size_t len)
+{
+ return 0;
+}
+static inline void *trace_seq_reserve(struct trace_seq *s, size_t len)
+{
+ return NULL;
+}
+static inline int trace_seq_path(struct trace_seq *s, const struct path *path)
+{
+ return 0;
+}
+#endif /* CONFIG_TRACING */
+
+#endif /* _LINUX_TRACE_SEQ_H */
diff --git a/src/Makefile b/src/Makefile
index f400583..523e8ef 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -11,6 +11,7 @@
HEADERS += $(HPFX)/debugfs.h
HEADERS += $(HPFX)/dso.h
HEADERS += $(HPFX)/event.h
+HEADERS += $(HPFX)/event-parse.h
HEADERS += $(HPFX)/evsel.h
HEADERS += $(HPFX)/evlist.h
HEADERS += $(HPFX)/fs.h
@@ -33,12 +34,14 @@
HEADERS += $(HPFX)/symbol.h
HEADERS += $(HPFX)/target.h
HEADERS += $(HPFX)/thread_map.h
+HEADERS += $(HPFX)/trace_seq.h
HEADERS += $(HPFX)/xyarray.h
OBJS += cpumap.o
OBJS += ctype.o
OBJS += debug.o
OBJS += debugfs.o
+OBJS += event-parse.o
OBJS += evlist.o
OBJS += evsel.o
OBJS += fs.o
@@ -48,13 +51,14 @@
OBJS += rbtree.o
OBJS += strlist.o
OBJS += thread_map.o
+OBJS += trace-seq.o
OBJS += util.o
OBJS += xyarray.o
INCLUDES += -I../include
BASIC_CFLAGS = $(INCLUDES)
-CFLAGS = -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6 -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS) $(EXTRA_CFLAGS)
+CFLAGS = -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6 -D_GNU_SOURCE -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS) $(EXTRA_CFLAGS)
EXTLIBS =
ALL_CFLAGS = $(CFLAGS) $(BASIC_CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
ALL_LDFLAGS = $(LDFLAGS)
diff --git a/src/event-parse.c b/src/event-parse.c
new file mode 100644
index 0000000..858a836
--- /dev/null
+++ b/src/event-parse.c
@@ -0,0 +1,6054 @@
+/* Copied from tools/lib/traceevent/event-parse.c and adapted to rasd */
+
+/*
+ * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License (not later!)
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * The parts for function graph printing was taken and modified from the
+ * Linux Kernel that were written by
+ * - Copyright (C) 2009 Frederic Weisbecker,
+ * Frederic Weisbecker gave his permission to relicense the code to
+ * the Lesser General Public License.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stdint.h>
+#include <limits.h>
+
+#include "debug.h"
+#include "event-parse.h"
+
+static const char *input_buf;
+static unsigned long long input_buf_ptr;
+static unsigned long long input_buf_siz;
+
+static int is_flag_field;
+static int is_symbolic_field;
+
+static int show_warning = 1;
+
+#define min(x, y) ({ \
+ typeof(x) _min1 = (x); \
+ typeof(y) _min2 = (y); \
+ (void) (&_min1 == &_min2); \
+ _min1 < _min2 ? _min1 : _min2; })
+
+void __vwarning(const char *fmt, va_list ap)
+{
+ if (errno)
+ perror("rasd");
+ errno = 0;
+
+ fprintf(stderr, " ");
+ vfprintf(stderr, fmt, ap);
+
+ fprintf(stderr, "\n");
+}
+
+void warning(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ __vwarning(fmt, ap);
+ va_end(ap);
+}
+
+#define do_warning(fmt, ...) \
+ do { \
+ if (show_warning) \
+ warning(fmt, ##__VA_ARGS__); \
+ } while (0)
+
+#define do_warning_event(event, fmt, ...) \
+ do { \
+ if (!show_warning) \
+ continue; \
+ \
+ if (event) \
+ warning("[%s:%s] " fmt, event->system, \
+ event->name, ##__VA_ARGS__); \
+ else \
+ warning(fmt, ##__VA_ARGS__); \
+ } while (0)
+
+static void init_input_buf(const char *buf, unsigned long long size)
+{
+ input_buf = buf;
+ input_buf_siz = size;
+ input_buf_ptr = 0;
+}
+
+const char *pevent_get_input_buf(void)
+{
+ return input_buf;
+}
+
+unsigned long long pevent_get_input_buf_ptr(void)
+{
+ return input_buf_ptr;
+}
+
+struct event_handler {
+ struct event_handler *next;
+ int id;
+ const char *sys_name;
+ const char *event_name;
+ pevent_event_handler_func func;
+ void *context;
+};
+
+struct pevent_func_params {
+ struct pevent_func_params *next;
+ enum pevent_func_arg_type type;
+};
+
+struct pevent_function_handler {
+ struct pevent_function_handler *next;
+ enum pevent_func_arg_type ret_type;
+ char *name;
+ pevent_func_handler func;
+ struct pevent_func_params *params;
+ int nr_args;
+};
+
+static unsigned long long
+process_defined_func(struct trace_seq *s, void *data, int size,
+ struct event_format *event, struct print_arg *arg);
+
+static void free_func_handle(struct pevent_function_handler *func);
+
+/**
+ * pevent_buffer_init - init buffer for parsing
+ * @buf: buffer to parse
+ * @size: the size of the buffer
+ *
+ * For use with pevent_read_token(), this initializes the internal
+ * buffer that pevent_read_token() will parse.
+ */
+void pevent_buffer_init(const char *buf, unsigned long long size)
+{
+ init_input_buf(buf, size);
+}
+
+void breakpoint(void)
+{
+ static int x;
+ x++;
+}
+
+struct print_arg *alloc_arg(void)
+{
+ return calloc(1, sizeof(struct print_arg));
+}
+
+struct cmdline {
+ char *comm;
+ int pid;
+};
+
+static int cmdline_cmp(const void *a, const void *b)
+{
+ const struct cmdline *ca = a;
+ const struct cmdline *cb = b;
+
+ if (ca->pid < cb->pid)
+ return -1;
+ if (ca->pid > cb->pid)
+ return 1;
+
+ return 0;
+}
+
+struct cmdline_list {
+ struct cmdline_list *next;
+ char *comm;
+ int pid;
+};
+
+static int cmdline_init(struct pevent *pevent)
+{
+ struct cmdline_list *cmdlist = pevent->cmdlist;
+ struct cmdline_list *item;
+ struct cmdline *cmdlines;
+ int i;
+
+ cmdlines = malloc(sizeof(*cmdlines) * pevent->cmdline_count);
+ if (!cmdlines)
+ return -1;
+
+ i = 0;
+ while (cmdlist) {
+ cmdlines[i].pid = cmdlist->pid;
+ cmdlines[i].comm = cmdlist->comm;
+ i++;
+ item = cmdlist;
+ cmdlist = cmdlist->next;
+ free(item);
+ }
+
+ qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
+
+ pevent->cmdlines = cmdlines;
+ pevent->cmdlist = NULL;
+
+ return 0;
+}
+
+static const char *find_cmdline(struct pevent *pevent, int pid)
+{
+ const struct cmdline *comm;
+ struct cmdline key;
+
+ if (!pid)
+ return "<idle>";
+
+ if (!pevent->cmdlines && cmdline_init(pevent))
+ return "<not enough memory for cmdlines!>";
+
+ key.pid = pid;
+
+ comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
+ sizeof(*pevent->cmdlines), cmdline_cmp);
+
+ if (comm)
+ return comm->comm;
+ return "<...>";
+}
+
+/**
+ * pevent_pid_is_registered - return if a pid has a cmdline registered
+ * @pevent: handle for the pevent
+ * @pid: The pid to check if it has a cmdline registered with.
+ *
+ * Returns 1 if the pid has a cmdline mapped to it
+ * 0 otherwise.
+ */
+int pevent_pid_is_registered(struct pevent *pevent, int pid)
+{
+ const struct cmdline *comm;
+ struct cmdline key;
+
+ if (!pid)
+ return 1;
+
+ if (!pevent->cmdlines && cmdline_init(pevent))
+ return 0;
+
+ key.pid = pid;
+
+ comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
+ sizeof(*pevent->cmdlines), cmdline_cmp);
+
+ if (comm)
+ return 1;
+ return 0;
+}
+
+/*
+ * If the command lines have been converted to an array, then
+ * we must add this pid. This is much slower than when cmdlines
+ * are added before the array is initialized.
+ */
+static int add_new_comm(struct pevent *pevent, const char *comm, int pid)
+{
+ struct cmdline *cmdlines = pevent->cmdlines;
+ const struct cmdline *cmdline;
+ struct cmdline key;
+
+ if (!pid)
+ return 0;
+
+ /* avoid duplicates */
+ key.pid = pid;
+
+ cmdline = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
+ sizeof(*pevent->cmdlines), cmdline_cmp);
+ if (cmdline) {
+ errno = EEXIST;
+ return -1;
+ }
+
+ cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (pevent->cmdline_count + 1));
+ if (!cmdlines) {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ cmdlines[pevent->cmdline_count].comm = strdup(comm);
+ if (!cmdlines[pevent->cmdline_count].comm) {
+ free(cmdlines);
+ errno = ENOMEM;
+ return -1;
+ }
+
+ cmdlines[pevent->cmdline_count].pid = pid;
+
+ if (cmdlines[pevent->cmdline_count].comm)
+ pevent->cmdline_count++;
+
+ qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
+ pevent->cmdlines = cmdlines;
+
+ return 0;
+}
+
+/**
+ * pevent_register_comm - register a pid / comm mapping
+ * @pevent: handle for the pevent
+ * @comm: the command line to register
+ * @pid: the pid to map the command line to
+ *
+ * This adds a mapping to search for command line names with
+ * a given pid. The comm is duplicated.
+ */
+int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
+{
+ struct cmdline_list *item;
+
+ if (pevent->cmdlines)
+ return add_new_comm(pevent, comm, pid);
+
+ item = malloc(sizeof(*item));
+ if (!item)
+ return -1;
+
+ item->comm = strdup(comm);
+ if (!item->comm) {
+ free(item);
+ return -1;
+ }
+ item->pid = pid;
+ item->next = pevent->cmdlist;
+
+ pevent->cmdlist = item;
+ pevent->cmdline_count++;
+
+ return 0;
+}
+
+void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock)
+{
+ pevent->trace_clock = trace_clock;
+}
+
+struct func_map {
+ unsigned long long addr;
+ char *func;
+ char *mod;
+};
+
+struct func_list {
+ struct func_list *next;
+ unsigned long long addr;
+ char *func;
+ char *mod;
+};
+
+static int func_cmp(const void *a, const void *b)
+{
+ const struct func_map *fa = a;
+ const struct func_map *fb = b;
+
+ if (fa->addr < fb->addr)
+ return -1;
+ if (fa->addr > fb->addr)
+ return 1;
+
+ return 0;
+}
+
+/*
+ * We are searching for a record in between, not an exact
+ * match.
+ */
+static int func_bcmp(const void *a, const void *b)
+{
+ const struct func_map *fa = a;
+ const struct func_map *fb = b;
+
+ if ((fa->addr == fb->addr) ||
+
+ (fa->addr > fb->addr &&
+ fa->addr < (fb+1)->addr))
+ return 0;
+
+ if (fa->addr < fb->addr)
+ return -1;
+
+ return 1;
+}
+
+static int func_map_init(struct pevent *pevent)
+{
+ struct func_list *funclist;
+ struct func_list *item;
+ struct func_map *func_map;
+ int i;
+
+ func_map = malloc(sizeof(*func_map) * (pevent->func_count + 1));
+ if (!func_map)
+ return -1;
+
+ funclist = pevent->funclist;
+
+ i = 0;
+ while (funclist) {
+ func_map[i].func = funclist->func;
+ func_map[i].addr = funclist->addr;
+ func_map[i].mod = funclist->mod;
+ i++;
+ item = funclist;
+ funclist = funclist->next;
+ free(item);
+ }
+
+ qsort(func_map, pevent->func_count, sizeof(*func_map), func_cmp);
+
+ /*
+ * Add a special record at the end.
+ */
+ func_map[pevent->func_count].func = NULL;
+ func_map[pevent->func_count].addr = 0;
+ func_map[pevent->func_count].mod = NULL;
+
+ pevent->func_map = func_map;
+ pevent->funclist = NULL;
+
+ return 0;
+}
+
+static struct func_map *
+find_func(struct pevent *pevent, unsigned long long addr)
+{
+ struct func_map *func;
+ struct func_map key;
+
+ if (!pevent->func_map)
+ func_map_init(pevent);
+
+ key.addr = addr;
+
+ func = bsearch(&key, pevent->func_map, pevent->func_count,
+ sizeof(*pevent->func_map), func_bcmp);
+
+ return func;
+}
+
+/**
+ * pevent_find_function - find a function by a given address
+ * @pevent: handle for the pevent
+ * @addr: the address to find the function with
+ *
+ * Returns a pointer to the function stored that has the given
+ * address. Note, the address does not have to be exact, it
+ * will select the function that would contain the address.
+ */
+const char *pevent_find_function(struct pevent *pevent, unsigned long long addr)
+{
+ struct func_map *map;
+
+ map = find_func(pevent, addr);
+ if (!map)
+ return NULL;
+
+ return map->func;
+}
+
+/**
+ * pevent_find_function_address - find a function address by a given address
+ * @pevent: handle for the pevent
+ * @addr: the address to find the function with
+ *
+ * Returns the address the function starts at. This can be used in
+ * conjunction with pevent_find_function to print both the function
+ * name and the function offset.
+ */
+unsigned long long
+pevent_find_function_address(struct pevent *pevent, unsigned long long addr)
+{
+ struct func_map *map;
+
+ map = find_func(pevent, addr);
+ if (!map)
+ return 0;
+
+ return map->addr;
+}
+
+/**
+ * pevent_register_function - register a function with a given address
+ * @pevent: handle for the pevent
+ * @function: the function name to register
+ * @addr: the address the function starts at
+ * @mod: the kernel module the function may be in (NULL for none)
+ *
+ * This registers a function name with an address and module.
+ * The @func passed in is duplicated.
+ */
+int pevent_register_function(struct pevent *pevent, char *func,
+ unsigned long long addr, char *mod)
+{
+ struct func_list *item = malloc(sizeof(*item));
+
+ if (!item)
+ return -1;
+
+ item->next = pevent->funclist;
+ item->func = strdup(func);
+ if (!item->func)
+ goto out_free;
+
+ if (mod) {
+ item->mod = strdup(mod);
+ if (!item->mod)
+ goto out_free_func;
+ } else
+ item->mod = NULL;
+ item->addr = addr;
+
+ pevent->funclist = item;
+ pevent->func_count++;
+
+ return 0;
+
+out_free_func:
+ free(item->func);
+ item->func = NULL;
+out_free:
+ free(item);
+ errno = ENOMEM;
+ return -1;
+}
+
+/**
+ * pevent_print_funcs - print out the stored functions
+ * @pevent: handle for the pevent
+ *
+ * This prints out the stored functions.
+ */
+void pevent_print_funcs(struct pevent *pevent)
+{
+ int i;
+
+ if (!pevent->func_map)
+ func_map_init(pevent);
+
+ for (i = 0; i < (int)pevent->func_count; i++) {
+ printf("%016llx %s",
+ pevent->func_map[i].addr,
+ pevent->func_map[i].func);
+ if (pevent->func_map[i].mod)
+ printf(" [%s]\n", pevent->func_map[i].mod);
+ else
+ printf("\n");
+ }
+}
+
+struct printk_map {
+ unsigned long long addr;
+ char *printk;
+};
+
+struct printk_list {
+ struct printk_list *next;
+ unsigned long long addr;
+ char *printk;
+};
+
+static int printk_cmp(const void *a, const void *b)
+{
+ const struct printk_map *pa = a;
+ const struct printk_map *pb = b;
+
+ if (pa->addr < pb->addr)
+ return -1;
+ if (pa->addr > pb->addr)
+ return 1;
+
+ return 0;
+}
+
+static int printk_map_init(struct pevent *pevent)
+{
+ struct printk_list *printklist;
+ struct printk_list *item;
+ struct printk_map *printk_map;
+ int i;
+
+ printk_map = malloc(sizeof(*printk_map) * (pevent->printk_count + 1));
+ if (!printk_map)
+ return -1;
+
+ printklist = pevent->printklist;
+
+ i = 0;
+ while (printklist) {
+ printk_map[i].printk = printklist->printk;
+ printk_map[i].addr = printklist->addr;
+ i++;
+ item = printklist;
+ printklist = printklist->next;
+ free(item);
+ }
+
+ qsort(printk_map, pevent->printk_count, sizeof(*printk_map), printk_cmp);
+
+ pevent->printk_map = printk_map;
+ pevent->printklist = NULL;
+
+ return 0;
+}
+
+static struct printk_map *
+find_printk(struct pevent *pevent, unsigned long long addr)
+{
+ struct printk_map *printk;
+ struct printk_map key;
+
+ if (!pevent->printk_map && printk_map_init(pevent))
+ return NULL;
+
+ key.addr = addr;
+
+ printk = bsearch(&key, pevent->printk_map, pevent->printk_count,
+ sizeof(*pevent->printk_map), printk_cmp);
+
+ return printk;
+}
+
+/**
+ * pevent_register_print_string - register a string by its address
+ * @pevent: handle for the pevent
+ * @fmt: the string format to register
+ * @addr: the address the string was located at
+ *
+ * This registers a string by the address it was stored in the kernel.
+ * The @fmt passed in is duplicated.
+ */
+int pevent_register_print_string(struct pevent *pevent, const char *fmt,
+ unsigned long long addr)
+{
+ struct printk_list *item = malloc(sizeof(*item));
+ char *p;
+
+ if (!item)
+ return -1;
+
+ item->next = pevent->printklist;
+ item->addr = addr;
+
+ /* Strip off quotes and '\n' from the end */
+ if (fmt[0] == '"')
+ fmt++;
+ item->printk = strdup(fmt);
+ if (!item->printk)
+ goto out_free;
+
+ p = item->printk + strlen(item->printk) - 1;
+ if (*p == '"')
+ *p = 0;
+
+ p -= 2;
+ if (strcmp(p, "\\n") == 0)
+ *p = 0;
+
+ pevent->printklist = item;
+ pevent->printk_count++;
+
+ return 0;
+
+out_free:
+ free(item);
+ errno = ENOMEM;
+ return -1;
+}
+
+/**
+ * pevent_print_printk - print out the stored strings
+ * @pevent: handle for the pevent
+ *
+ * This prints the string formats that were stored.
+ */
+void pevent_print_printk(struct pevent *pevent)
+{
+ int i;
+
+ if (!pevent->printk_map)
+ printk_map_init(pevent);
+
+ for (i = 0; i < (int)pevent->printk_count; i++) {
+ printf("%016llx %s\n",
+ pevent->printk_map[i].addr,
+ pevent->printk_map[i].printk);
+ }
+}
+
+static struct event_format *alloc_event(void)
+{
+ return calloc(1, sizeof(struct event_format));
+}
+
+static int add_event(struct pevent *pevent, struct event_format *event)
+{
+ int i;
+ struct event_format **events = realloc(pevent->events, sizeof(event) *
+ (pevent->nr_events + 1));
+ if (!events)
+ return -1;
+
+ pevent->events = events;
+
+ for (i = 0; i < pevent->nr_events; i++) {
+ if (pevent->events[i]->id > event->id)
+ break;
+ }
+ if (i < pevent->nr_events)
+ memmove(&pevent->events[i + 1],
+ &pevent->events[i],
+ sizeof(event) * (pevent->nr_events - i));
+
+ pevent->events[i] = event;
+ pevent->nr_events++;
+
+ event->pevent = pevent;
+
+ return 0;
+}
+
+static int event_item_type(enum event_type type)
+{
+ switch (type) {
+ case EVENT_ITEM ... EVENT_SQUOTE:
+ return 1;
+ case EVENT_ERROR ... EVENT_DELIM:
+ default:
+ return 0;
+ }
+}
+
+static void free_flag_sym(struct print_flag_sym *fsym)
+{
+ struct print_flag_sym *next;
+
+ while (fsym) {
+ next = fsym->next;
+ free(fsym->value);
+ free(fsym->str);
+ free(fsym);
+ fsym = next;
+ }
+}
+
+static void free_arg(struct print_arg *arg)
+{
+ struct print_arg *farg;
+
+ if (!arg)
+ return;
+
+ switch (arg->type) {
+ case PRINT_ATOM:
+ free(arg->atom.atom);
+ break;
+ case PRINT_FIELD:
+ free(arg->field.name);
+ break;
+ case PRINT_FLAGS:
+ free_arg(arg->flags.field);
+ free(arg->flags.delim);
+ free_flag_sym(arg->flags.flags);
+ break;
+ case PRINT_SYMBOL:
+ free_arg(arg->symbol.field);
+ free_flag_sym(arg->symbol.symbols);
+ break;
+ case PRINT_HEX:
+ free_arg(arg->hex.field);
+ free_arg(arg->hex.size);
+ break;
+ case PRINT_TYPE:
+ free(arg->typecast.type);
+ free_arg(arg->typecast.item);
+ break;
+ case PRINT_STRING:
+ case PRINT_BSTRING:
+ free(arg->string.string);
+ break;
+ case PRINT_BITMASK:
+ free(arg->bitmask.bitmask);
+ break;
+ case PRINT_DYNAMIC_ARRAY:
+ free(arg->dynarray.index);
+ break;
+ case PRINT_OP:
+ free(arg->op.op);
+ free_arg(arg->op.left);
+ free_arg(arg->op.right);
+ break;
+ case PRINT_FUNC:
+ while (arg->func.args) {
+ farg = arg->func.args;
+ arg->func.args = farg->next;
+ free_arg(farg);
+ }
+ break;
+
+ case PRINT_NULL:
+ default:
+ break;
+ }
+
+ free(arg);
+}
+
+static enum event_type get_type(int ch)
+{
+ if (ch == '\n')
+ return EVENT_NEWLINE;
+ if (isspace(ch))
+ return EVENT_SPACE;
+ if (isalnum(ch) || ch == '_')
+ return EVENT_ITEM;
+ if (ch == '\'')
+ return EVENT_SQUOTE;
+ if (ch == '"')
+ return EVENT_DQUOTE;
+ if (!isprint(ch))
+ return EVENT_NONE;
+ if (ch == '(' || ch == ')' || ch == ',')
+ return EVENT_DELIM;
+
+ return EVENT_OP;
+}
+
+static int __read_char(void)
+{
+ if (input_buf_ptr >= input_buf_siz)
+ return -1;
+
+ return input_buf[input_buf_ptr++];
+}
+
+static int __peek_char(void)
+{
+ if (input_buf_ptr >= input_buf_siz)
+ return -1;
+
+ return input_buf[input_buf_ptr];
+}
+
+/**
+ * pevent_peek_char - peek at the next character that will be read
+ *
+ * Returns the next character read, or -1 if end of buffer.
+ */
+int pevent_peek_char(void)
+{
+ return __peek_char();
+}
+
+static int extend_token(char **tok, char *buf, int size)
+{
+ char *newtok = realloc(*tok, size);
+
+ if (!newtok) {
+ free(*tok);
+ *tok = NULL;
+ return -1;
+ }
+
+ if (!*tok)
+ strcpy(newtok, buf);
+ else
+ strcat(newtok, buf);
+ *tok = newtok;
+
+ return 0;
+}
+
+static enum event_type force_token(const char *str, char **tok);
+
+static enum event_type __read_token(char **tok)
+{
+ char buf[BUFSIZ];
+ int ch, last_ch, quote_ch, next_ch;
+ int i = 0;
+ int tok_size = 0;
+ enum event_type type;
+
+ *tok = NULL;
+
+
+ ch = __read_char();
+ if (ch < 0)
+ return EVENT_NONE;
+
+ type = get_type(ch);
+ if (type == EVENT_NONE)
+ return type;
+
+ buf[i++] = ch;
+
+ switch (type) {
+ case EVENT_NEWLINE:
+ case EVENT_DELIM:
+ if (asprintf(tok, "%c", ch) < 0)
+ return EVENT_ERROR;
+
+ return type;
+
+ case EVENT_OP:
+ switch (ch) {
+ case '-':
+ next_ch = __peek_char();
+ if (next_ch == '>') {
+ buf[i++] = __read_char();
+ break;
+ }
+ /* fall through */
+ case '+':
+ case '|':
+ case '&':
+ case '>':
+ case '<':
+ last_ch = ch;
+ ch = __peek_char();
+ if (ch != last_ch)
+ goto test_equal;
+ buf[i++] = __read_char();
+ switch (last_ch) {
+ case '>':
+ case '<':
+ goto test_equal;
+ default:
+ break;
+ }
+ break;
+ case '!':
+ case '=':
+ goto test_equal;
+ default: /* what should we do instead? */
+ break;
+ }
+ buf[i] = 0;
+ *tok = strdup(buf);
+ return type;
+
+ test_equal:
+ ch = __peek_char();
+ if (ch == '=')
+ buf[i++] = __read_char();
+ goto out;
+
+ case EVENT_DQUOTE:
+ case EVENT_SQUOTE:
+ /* don't keep quotes */
+ i--;
+ quote_ch = ch;
+ last_ch = 0;
+ concat:
+ do {
+ if (i == (BUFSIZ - 1)) {
+ buf[i] = 0;
+ tok_size += BUFSIZ;
+
+ if (extend_token(tok, buf, tok_size) < 0)
+ return EVENT_NONE;
+ i = 0;
+ }
+ last_ch = ch;
+ ch = __read_char();
+ buf[i++] = ch;
+ /* the '\' '\' will cancel itself */
+ if (ch == '\\' && last_ch == '\\')
+ last_ch = 0;
+ } while (ch != quote_ch || last_ch == '\\');
+ /* remove the last quote */
+ i--;
+
+ /*
+ * For strings (double quotes) check the next token.
+ * If it is another string, concatinate the two.
+ */
+ if (type == EVENT_DQUOTE) {
+ unsigned long long save_input_buf_ptr = input_buf_ptr;
+
+ do {
+ ch = __read_char();
+ } while (isspace(ch));
+ if (ch == '"')
+ goto concat;
+ input_buf_ptr = save_input_buf_ptr;
+ }
+
+ goto out;
+
+ case EVENT_ERROR ... EVENT_SPACE:
+ case EVENT_ITEM:
+ default:
+ break;
+ }
+
+ while (get_type(__peek_char()) == type) {
+ if (i == (BUFSIZ - 1)) {
+ buf[i] = 0;
+ tok_size += BUFSIZ;
+
+ if (extend_token(tok, buf, tok_size) < 0)
+ return EVENT_NONE;
+ i = 0;
+ }
+ ch = __read_char();
+ buf[i++] = ch;
+ }
+
+ out:
+ buf[i] = 0;
+ if (extend_token(tok, buf, tok_size + i + 1) < 0)
+ return EVENT_NONE;
+
+ if (type == EVENT_ITEM) {
+ /*
+ * Older versions of the kernel has a bug that
+ * creates invalid symbols and will break the mac80211
+ * parsing. This is a work around to that bug.
+ *
+ * See Linux kernel commit:
+ * 811cb50baf63461ce0bdb234927046131fc7fa8b
+ */
+ if (strcmp(*tok, "LOCAL_PR_FMT") == 0) {
+ free(*tok);
+ *tok = NULL;
+ return force_token("\"\%s\" ", tok);
+ } else if (strcmp(*tok, "STA_PR_FMT") == 0) {
+ free(*tok);
+ *tok = NULL;
+ return force_token("\" sta:%pM\" ", tok);
+ } else if (strcmp(*tok, "VIF_PR_FMT") == 0) {
+ free(*tok);
+ *tok = NULL;
+ return force_token("\" vif:%p(%d)\" ", tok);
+ }
+ }
+
+ return type;
+}
+
+static enum event_type force_token(const char *str, char **tok)
+{
+ const char *save_input_buf;
+ unsigned long long save_input_buf_ptr;
+ unsigned long long save_input_buf_siz;
+ enum event_type type;
+
+ /* save off the current input pointers */
+ save_input_buf = input_buf;
+ save_input_buf_ptr = input_buf_ptr;
+ save_input_buf_siz = input_buf_siz;
+
+ init_input_buf(str, strlen(str));
+
+ type = __read_token(tok);
+
+ /* reset back to original token */
+ input_buf = save_input_buf;
+ input_buf_ptr = save_input_buf_ptr;
+ input_buf_siz = save_input_buf_siz;
+
+ return type;
+}
+
+static void free_token(char *tok)
+{
+ if (tok)
+ free(tok);
+}
+
+static enum event_type read_token(char **tok)
+{
+ enum event_type type;
+
+ for (;;) {
+ type = __read_token(tok);
+ if (type != EVENT_SPACE)
+ return type;
+
+ free_token(*tok);
+ }
+
+ /* not reached */
+ *tok = NULL;
+ return EVENT_NONE;
+}
+
+/**
+ * pevent_read_token - access to utilites to use the pevent parser
+ * @tok: The token to return
+ *
+ * This will parse tokens from the string given by
+ * pevent_init_data().
+ *
+ * Returns the token type.
+ */
+enum event_type pevent_read_token(char **tok)
+{
+ return read_token(tok);
+}
+
+/**
+ * pevent_free_token - free a token returned by pevent_read_token
+ * @token: the token to free
+ */
+void pevent_free_token(char *token)
+{
+ free_token(token);
+}
+
+/* no newline */
+static enum event_type read_token_item(char **tok)
+{
+ enum event_type type;
+
+ for (;;) {
+ type = __read_token(tok);
+ if (type != EVENT_SPACE && type != EVENT_NEWLINE)
+ return type;
+ free_token(*tok);
+ *tok = NULL;
+ }
+
+ /* not reached */
+ *tok = NULL;
+ return EVENT_NONE;
+}
+
+static int test_type(enum event_type type, enum event_type expect)
+{
+ if (type != expect) {
+ do_warning("Error: expected type %d but read %d",
+ expect, type);
+ return -1;
+ }
+ return 0;
+}
+
+static int test_type_token(enum event_type type, const char *token,
+ enum event_type expect, const char *expect_tok)
+{
+ if (type != expect) {
+ do_warning("Error: expected type %d but read %d",
+ expect, type);
+ return -1;
+ }
+
+ if (strcmp(token, expect_tok) != 0) {
+ do_warning("Error: expected '%s' but read '%s'",
+ expect_tok, token);
+ return -1;
+ }
+ return 0;
+}
+
+static int __read_expect_type(enum event_type expect, char **tok, int newline_ok)
+{
+ enum event_type type;
+
+ if (newline_ok)
+ type = read_token(tok);
+ else
+ type = read_token_item(tok);
+ return test_type(type, expect);
+}
+
+static int read_expect_type(enum event_type expect, char **tok)
+{
+ return __read_expect_type(expect, tok, 1);
+}
+
+static int __read_expected(enum event_type expect, const char *str,
+ int newline_ok)
+{
+ enum event_type type;
+ char *token;
+ int ret;
+
+ if (newline_ok)
+ type = read_token(&token);
+ else
+ type = read_token_item(&token);
+
+ ret = test_type_token(type, token, expect, str);
+
+ free_token(token);
+
+ return ret;
+}
+
+static int read_expected(enum event_type expect, const char *str)
+{
+ return __read_expected(expect, str, 1);
+}
+
+static int read_expected_item(enum event_type expect, const char *str)
+{
+ return __read_expected(expect, str, 0);
+}
+
+static char *event_read_name(void)
+{
+ char *token;
+
+ if (read_expected(EVENT_ITEM, "name") < 0)
+ return NULL;
+
+ if (read_expected(EVENT_OP, ":") < 0)
+ return NULL;
+
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto fail;
+
+ return token;
+
+ fail:
+ free_token(token);
+ return NULL;
+}
+
+static int event_read_id(void)
+{
+ char *token;
+ int id;
+
+ if (read_expected_item(EVENT_ITEM, "ID") < 0)
+ return -1;
+
+ if (read_expected(EVENT_OP, ":") < 0)
+ return -1;
+
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto fail;
+
+ id = strtoul(token, NULL, 0);
+ free_token(token);
+ return id;
+
+ fail:
+ free_token(token);
+ return -1;
+}
+
+static int field_is_string(struct format_field *field)
+{
+ if ((field->flags & FIELD_IS_ARRAY) &&
+ (strstr(field->type, "char") || strstr(field->type, "u8") ||
+ strstr(field->type, "s8")))
+ return 1;
+
+ return 0;
+}
+
+static int field_is_dynamic(struct format_field *field)
+{
+ if (strncmp(field->type, "__data_loc", 10) == 0)
+ return 1;
+
+ return 0;
+}
+
+static int field_is_long(struct format_field *field)
+{
+ /* includes long long */
+ if (strstr(field->type, "long"))
+ return 1;
+
+ return 0;
+}
+
+static unsigned int type_size(const char *name)
+{
+ /* This covers all FIELD_IS_STRING types. */
+ static struct {
+ const char *type;
+ unsigned int size;
+ } table[] = {
+ { "u8", 1 },
+ { "u16", 2 },
+ { "u32", 4 },
+ { "u64", 8 },
+ { "s8", 1 },
+ { "s16", 2 },
+ { "s32", 4 },
+ { "s64", 8 },
+ { "char", 1 },
+ { 0, 0},
+ };
+ int i;
+
+ for (i = 0; table[i].type; i++) {
+ if (!strcmp(table[i].type, name))
+ return table[i].size;
+ }
+
+ return 0;
+}
+
+static int event_read_fields(struct event_format *event, struct format_field **fields)
+{
+ struct format_field *field = NULL;
+ enum event_type type;
+ char *token;
+ char *last_token;
+ int count = 0;
+
+ do {
+ unsigned int size_dynamic = 0;
+
+ type = read_token(&token);
+ if (type == EVENT_NEWLINE) {
+ free_token(token);
+ return count;
+ }
+
+ count++;
+
+ if (test_type_token(type, token, EVENT_ITEM, "field"))
+ goto fail;
+ free_token(token);
+
+ type = read_token(&token);
+ /*
+ * The ftrace fields may still use the "special" name.
+ * Just ignore it.
+ */
+ if (event->flags & EVENT_FL_ISFTRACE &&
+ type == EVENT_ITEM && strcmp(token, "special") == 0) {
+ free_token(token);
+ type = read_token(&token);
+ }
+
+ if (test_type_token(type, token, EVENT_OP, ":") < 0)
+ goto fail;
+
+ free_token(token);
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto fail;
+
+ last_token = token;
+
+ field = calloc(1, sizeof(*field));
+ if (!field)
+ goto fail;
+
+ field->event = event;
+
+ /* read the rest of the type */
+ for (;;) {
+ type = read_token(&token);
+ if (type == EVENT_ITEM ||
+ (type == EVENT_OP && strcmp(token, "*") == 0) ||
+ /*
+ * Some of the ftrace fields are broken and have
+ * an illegal "." in them.
+ */
+ (event->flags & EVENT_FL_ISFTRACE &&
+ type == EVENT_OP && strcmp(token, ".") == 0)) {
+
+ if (strcmp(token, "*") == 0)
+ field->flags |= FIELD_IS_POINTER;
+
+ if (field->type) {
+ char *new_type;
+ new_type = realloc(field->type,
+ strlen(field->type) +
+ strlen(last_token) + 2);
+ if (!new_type) {
+ free(last_token);
+ goto fail;
+ }
+ field->type = new_type;
+ strcat(field->type, " ");
+ strcat(field->type, last_token);
+ free(last_token);
+ } else
+ field->type = last_token;
+ last_token = token;
+ continue;
+ }
+
+ break;
+ }
+
+ if (!field->type) {
+ do_warning_event(event, "%s: no type found", __func__);
+ goto fail;
+ }
+ field->name = last_token;
+
+ if (test_type(type, EVENT_OP))
+ goto fail;
+
+ if (strcmp(token, "[") == 0) {
+ enum event_type last_type = type;
+ char *brackets = token;
+ char *new_brackets;
+ int len;
+
+ field->flags |= FIELD_IS_ARRAY;
+
+ type = read_token(&token);
+
+ if (type == EVENT_ITEM)
+ field->arraylen = strtoul(token, NULL, 0);
+ else
+ field->arraylen = 0;
+
+ while (strcmp(token, "]") != 0) {
+ if (last_type == EVENT_ITEM &&
+ type == EVENT_ITEM)
+ len = 2;
+ else
+ len = 1;
+ last_type = type;
+
+ new_brackets = realloc(brackets,
+ strlen(brackets) +
+ strlen(token) + len);
+ if (!new_brackets) {
+ free(brackets);
+ goto fail;
+ }
+ brackets = new_brackets;
+ if (len == 2)
+ strcat(brackets, " ");
+ strcat(brackets, token);
+ /* We only care about the last token */
+ field->arraylen = strtoul(token, NULL, 0);
+ free_token(token);
+ type = read_token(&token);
+ if (type == EVENT_NONE) {
+ do_warning_event(event, "failed to find token");
+ goto fail;
+ }
+ }
+
+ free_token(token);
+
+ new_brackets = realloc(brackets, strlen(brackets) + 2);
+ if (!new_brackets) {
+ free(brackets);
+ goto fail;
+ }
+ brackets = new_brackets;
+ strcat(brackets, "]");
+
+ /* add brackets to type */
+
+ type = read_token(&token);
+ /*
+ * If the next token is not an OP, then it is of
+ * the format: type [] item;
+ */
+ if (type == EVENT_ITEM) {
+ char *new_type;
+ new_type = realloc(field->type,
+ strlen(field->type) +
+ strlen(field->name) +
+ strlen(brackets) + 2);
+ if (!new_type) {
+ free(brackets);
+ goto fail;
+ }
+ field->type = new_type;
+ strcat(field->type, " ");
+ strcat(field->type, field->name);
+ size_dynamic = type_size(field->name);
+ free_token(field->name);
+ strcat(field->type, brackets);
+ field->name = token;
+ type = read_token(&token);
+ } else {
+ char *new_type;
+ new_type = realloc(field->type,
+ strlen(field->type) +
+ strlen(brackets) + 1);
+ if (!new_type) {
+ free(brackets);
+ goto fail;
+ }
+ field->type = new_type;
+ strcat(field->type, brackets);
+ }
+ free(brackets);
+ }
+
+ if (field_is_string(field))
+ field->flags |= FIELD_IS_STRING;
+ if (field_is_dynamic(field))
+ field->flags |= FIELD_IS_DYNAMIC;
+ if (field_is_long(field))
+ field->flags |= FIELD_IS_LONG;
+
+ if (test_type_token(type, token, EVENT_OP, ";"))
+ goto fail;
+ free_token(token);
+
+ if (read_expected(EVENT_ITEM, "offset") < 0)
+ goto fail_expect;
+
+ if (read_expected(EVENT_OP, ":") < 0)
+ goto fail_expect;
+
+ if (read_expect_type(EVENT_ITEM, &token))
+ goto fail;
+ field->offset = strtoul(token, NULL, 0);
+ free_token(token);
+
+ if (read_expected(EVENT_OP, ";") < 0)
+ goto fail_expect;
+
+ if (read_expected(EVENT_ITEM, "size") < 0)
+ goto fail_expect;
+
+ if (read_expected(EVENT_OP, ":") < 0)
+ goto fail_expect;
+
+ if (read_expect_type(EVENT_ITEM, &token))
+ goto fail;
+ field->size = strtoul(token, NULL, 0);
+ free_token(token);
+
+ if (read_expected(EVENT_OP, ";") < 0)
+ goto fail_expect;
+
+ type = read_token(&token);
+ if (type != EVENT_NEWLINE) {
+ /* newer versions of the kernel have a "signed" type */
+ if (test_type_token(type, token, EVENT_ITEM, "signed"))
+ goto fail;
+
+ free_token(token);
+
+ if (read_expected(EVENT_OP, ":") < 0)
+ goto fail_expect;
+
+ if (read_expect_type(EVENT_ITEM, &token))
+ goto fail;
+
+ if (strtoul(token, NULL, 0))
+ field->flags |= FIELD_IS_SIGNED;
+
+ free_token(token);
+ if (read_expected(EVENT_OP, ";") < 0)
+ goto fail_expect;
+
+ if (read_expect_type(EVENT_NEWLINE, &token))
+ goto fail;
+ }
+
+ free_token(token);
+
+ if (field->flags & FIELD_IS_ARRAY) {
+ if (field->arraylen)
+ field->elementsize = field->size / field->arraylen;
+ else if (field->flags & FIELD_IS_DYNAMIC)
+ field->elementsize = size_dynamic;
+ else if (field->flags & FIELD_IS_STRING)
+ field->elementsize = 1;
+ else if (field->flags & FIELD_IS_LONG)
+ field->elementsize = event->pevent ?
+ (unsigned int) event->pevent->long_size :
+ sizeof(long);
+ } else
+ field->elementsize = field->size;
+
+ *fields = field;
+ fields = &field->next;
+
+ } while (1);
+
+ return 0;
+
+fail:
+ free_token(token);
+fail_expect:
+ if (field) {
+ free(field->type);
+ free(field->name);
+ free(field);
+ }
+ return -1;
+}
+
+static int event_read_format(struct event_format *event)
+{
+ char *token;
+ int ret;
+
+ if (read_expected_item(EVENT_ITEM, "format") < 0)
+ return -1;
+
+ if (read_expected(EVENT_OP, ":") < 0)
+ return -1;
+
+ if (read_expect_type(EVENT_NEWLINE, &token))
+ goto fail;
+ free_token(token);
+
+ ret = event_read_fields(event, &event->format.common_fields);
+ if (ret < 0)
+ return ret;
+ event->format.nr_common = ret;
+
+ ret = event_read_fields(event, &event->format.fields);
+ if (ret < 0)
+ return ret;
+ event->format.nr_fields = ret;
+
+ return 0;
+
+ fail:
+ free_token(token);
+ return -1;
+}
+
+static enum event_type
+process_arg_token(struct event_format *event, struct print_arg *arg,
+ char **tok, enum event_type type);
+
+static enum event_type
+process_arg(struct event_format *event, struct print_arg *arg, char **tok)
+{
+ enum event_type type;
+ char *token;
+
+ type = read_token(&token);
+ *tok = token;
+
+ return process_arg_token(event, arg, tok, type);
+}
+
+static enum event_type
+process_op(struct event_format *event, struct print_arg *arg, char **tok);
+
+/*
+ * For __print_symbolic() and __print_flags, we need to completely
+ * evaluate the first argument, which defines what to print next.
+ */
+static enum event_type
+process_field_arg(struct event_format *event, struct print_arg *arg, char **tok)
+{
+ enum event_type type;
+
+ type = process_arg(event, arg, tok);
+
+ while (type == EVENT_OP) {
+ type = process_op(event, arg, tok);
+ }
+
+ return type;
+}
+
+static enum event_type
+process_cond(struct event_format *event, struct print_arg *top, char **tok)
+{
+ struct print_arg *arg, *left, *right;
+ enum event_type type;
+ char *token = NULL;
+
+ arg = alloc_arg();
+ left = alloc_arg();
+ right = alloc_arg();
+
+ if (!arg || !left || !right) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ /* arg will be freed at out_free */
+ free_arg(left);
+ free_arg(right);
+ goto out_free;
+ }
+
+ arg->type = PRINT_OP;
+ arg->op.left = left;
+ arg->op.right = right;
+
+ *tok = NULL;
+ type = process_arg(event, left, &token);
+
+ again:
+ /* Handle other operations in the arguments */
+ if (type == EVENT_OP && strcmp(token, ":") != 0) {
+ type = process_op(event, left, &token);
+ goto again;
+ }
+
+ if (test_type_token(type, token, EVENT_OP, ":"))
+ goto out_free;
+
+ arg->op.op = token;
+
+ type = process_arg(event, right, &token);
+
+ top->op.right = arg;
+
+ *tok = token;
+ return type;
+
+out_free:
+ /* Top may point to itself */
+ top->op.right = NULL;
+ free_token(token);
+ free_arg(arg);
+ return EVENT_ERROR;
+}
+
+static enum event_type
+process_array(struct event_format *event, struct print_arg *top, char **tok)
+{
+ struct print_arg *arg;
+ enum event_type type;
+ char *token = NULL;
+
+ arg = alloc_arg();
+ if (!arg) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ /* '*tok' is set to top->op.op. No need to free. */
+ *tok = NULL;
+ return EVENT_ERROR;
+ }
+
+ *tok = NULL;
+ type = process_arg(event, arg, &token);
+ if (test_type_token(type, token, EVENT_OP, "]"))
+ goto out_free;
+
+ top->op.right = arg;
+
+ free_token(token);
+ type = read_token_item(&token);
+ *tok = token;
+
+ return type;
+
+out_free:
+ free_token(token);
+ free_arg(arg);
+ return EVENT_ERROR;
+}
+
+static int get_op_prio(char *op)
+{
+ if (!op[1]) {
+ switch (op[0]) {
+ case '~':
+ case '!':
+ return 4;
+ case '*':
+ case '/':
+ case '%':
+ return 6;
+ case '+':
+ case '-':
+ return 7;
+ /* '>>' and '<<' are 8 */
+ case '<':
+ case '>':
+ return 9;
+ /* '==' and '!=' are 10 */
+ case '&':
+ return 11;
+ case '^':
+ return 12;
+ case '|':
+ return 13;
+ case '?':
+ return 16;
+ default:
+ do_warning("unknown op '%c'", op[0]);
+ return -1;
+ }
+ } else {
+ if (strcmp(op, "++") == 0 ||
+ strcmp(op, "--") == 0) {
+ return 3;
+ } else if (strcmp(op, ">>") == 0 ||
+ strcmp(op, "<<") == 0) {
+ return 8;
+ } else if (strcmp(op, ">=") == 0 ||
+ strcmp(op, "<=") == 0) {
+ return 9;
+ } else if (strcmp(op, "==") == 0 ||
+ strcmp(op, "!=") == 0) {
+ return 10;
+ } else if (strcmp(op, "&&") == 0) {
+ return 14;
+ } else if (strcmp(op, "||") == 0) {
+ return 15;
+ } else {
+ do_warning("unknown op '%s'", op);
+ return -1;
+ }
+ }
+}
+
+static int set_op_prio(struct print_arg *arg)
+{
+
+ /* single ops are the greatest */
+ if (!arg->op.left || arg->op.left->type == PRINT_NULL)
+ arg->op.prio = 0;
+ else
+ arg->op.prio = get_op_prio(arg->op.op);
+
+ return arg->op.prio;
+}
+
+/* Note, *tok does not get freed, but will most likely be saved */
+static enum event_type
+process_op(struct event_format *event, struct print_arg *arg, char **tok)
+{
+ struct print_arg *left, *right = NULL;
+ enum event_type type;
+ char *token;
+
+ /* the op is passed in via tok */
+ token = *tok;
+
+ if (arg->type == PRINT_OP && !arg->op.left) {
+ /* handle single op */
+ if (token[1]) {
+ do_warning_event(event, "bad op token %s", token);
+ goto out_free;
+ }
+ switch (token[0]) {
+ case '~':
+ case '!':
+ case '+':
+ case '-':
+ break;
+ default:
+ do_warning_event(event, "bad op token %s", token);
+ goto out_free;
+
+ }
+
+ /* make an empty left */
+ left = alloc_arg();
+ if (!left)
+ goto out_warn_free;
+
+ left->type = PRINT_NULL;
+ arg->op.left = left;
+
+ right = alloc_arg();
+ if (!right)
+ goto out_warn_free;
+
+ arg->op.right = right;
+
+ /* do not free the token, it belongs to an op */
+ *tok = NULL;
+ type = process_arg(event, right, tok);
+
+ } else if (strcmp(token, "?") == 0) {
+
+ left = alloc_arg();
+ if (!left)
+ goto out_warn_free;
+
+ /* copy the top arg to the left */
+ *left = *arg;
+
+ arg->type = PRINT_OP;
+ arg->op.op = token;
+ arg->op.left = left;
+ arg->op.prio = 0;
+
+ /* it will set arg->op.right */
+ type = process_cond(event, arg, tok);
+
+ } else if (strcmp(token, ">>") == 0 ||
+ strcmp(token, "<<") == 0 ||
+ strcmp(token, "&") == 0 ||
+ strcmp(token, "|") == 0 ||
+ strcmp(token, "&&") == 0 ||
+ strcmp(token, "||") == 0 ||
+ strcmp(token, "-") == 0 ||
+ strcmp(token, "+") == 0 ||
+ strcmp(token, "*") == 0 ||
+ strcmp(token, "^") == 0 ||
+ strcmp(token, "/") == 0 ||
+ strcmp(token, "<") == 0 ||
+ strcmp(token, ">") == 0 ||
+ strcmp(token, "<=") == 0 ||
+ strcmp(token, ">=") == 0 ||
+ strcmp(token, "==") == 0 ||
+ strcmp(token, "!=") == 0) {
+
+ left = alloc_arg();
+ if (!left)
+ goto out_warn_free;
+
+ /* copy the top arg to the left */
+ *left = *arg;
+
+ arg->type = PRINT_OP;
+ arg->op.op = token;
+ arg->op.left = left;
+ arg->op.right = NULL;
+
+ if (set_op_prio(arg) == -1) {
+ event->flags |= EVENT_FL_FAILED;
+ /* arg->op.op (= token) will be freed at out_free */
+ arg->op.op = NULL;
+ goto out_free;
+ }
+
+ type = read_token_item(&token);
+ *tok = token;
+
+ /* could just be a type pointer */
+ if ((strcmp(arg->op.op, "*") == 0) &&
+ type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
+ char *new_atom;
+
+ if (left->type != PRINT_ATOM) {
+ do_warning_event(event, "bad pointer type");
+ goto out_free;
+ }
+ new_atom = realloc(left->atom.atom,
+ strlen(left->atom.atom) + 3);
+ if (!new_atom)
+ goto out_warn_free;
+
+ left->atom.atom = new_atom;
+ strcat(left->atom.atom, " *");
+ free(arg->op.op);
+ *arg = *left;
+ free(left);
+
+ return type;
+ }
+
+ right = alloc_arg();
+ if (!right)
+ goto out_warn_free;
+
+ type = process_arg_token(event, right, tok, type);
+ arg->op.right = right;
+
+ } else if (strcmp(token, "[") == 0) {
+
+ left = alloc_arg();
+ if (!left)
+ goto out_warn_free;
+
+ *left = *arg;
+
+ arg->type = PRINT_OP;
+ arg->op.op = token;
+ arg->op.left = left;
+
+ arg->op.prio = 0;
+
+ /* it will set arg->op.right */
+ type = process_array(event, arg, tok);
+
+ } else {
+ do_warning_event(event, "unknown op '%s'", token);
+ event->flags |= EVENT_FL_FAILED;
+ /* the arg is now the left side */
+ goto out_free;
+ }
+
+ if (type == EVENT_OP && strcmp(*tok, ":") != 0) {
+ int prio;
+
+ /* higher prios need to be closer to the root */
+ prio = get_op_prio(*tok);
+
+ if (prio > arg->op.prio)
+ return process_op(event, arg, tok);
+
+ return process_op(event, right, tok);
+ }
+
+ return type;
+
+out_warn_free:
+ do_warning_event(event, "%s: not enough memory!", __func__);
+out_free:
+ free_token(token);
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
+static enum event_type
+process_entry(struct event_format *event __maybe_unused, struct print_arg *arg,
+ char **tok)
+{
+ enum event_type type;
+ char *field;
+ char *token;
+
+ if (read_expected(EVENT_OP, "->") < 0)
+ goto out_err;
+
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto out_free;
+ field = token;
+
+ arg->type = PRINT_FIELD;
+ arg->field.name = field;
+
+ if (is_flag_field) {
+ arg->field.field = pevent_find_any_field(event, arg->field.name);
+ arg->field.field->flags |= FIELD_IS_FLAG;
+ is_flag_field = 0;
+ } else if (is_symbolic_field) {
+ arg->field.field = pevent_find_any_field(event, arg->field.name);
+ arg->field.field->flags |= FIELD_IS_SYMBOLIC;
+ is_symbolic_field = 0;
+ }
+
+ type = read_token(&token);
+ *tok = token;
+
+ return type;
+
+ out_free:
+ free_token(token);
+ out_err:
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
+static char *arg_eval (struct print_arg *arg);
+
+static unsigned long long
+eval_type_str(unsigned long long val, const char *type, int pointer)
+{
+ int sign = 0;
+ char *ref;
+ int len;
+
+ len = strlen(type);
+
+ if (pointer) {
+
+ if (type[len-1] != '*') {
+ do_warning("pointer expected with non pointer type");
+ return val;
+ }
+
+ ref = malloc(len);
+ if (!ref) {
+ do_warning("%s: not enough memory!", __func__);
+ return val;
+ }
+ memcpy(ref, type, len);
+
+ /* chop off the " *" */
+ ref[len - 2] = 0;
+
+ val = eval_type_str(val, ref, 0);
+ free(ref);
+ return val;
+ }
+
+ /* check if this is a pointer */
+ if (type[len - 1] == '*')
+ return val;
+
+ /* Try to figure out the arg size*/
+ if (strncmp(type, "struct", 6) == 0)
+ /* all bets off */
+ return val;
+
+ if (strcmp(type, "u8") == 0)
+ return val & 0xff;
+
+ if (strcmp(type, "u16") == 0)
+ return val & 0xffff;
+
+ if (strcmp(type, "u32") == 0)
+ return val & 0xffffffff;
+
+ if (strcmp(type, "u64") == 0 ||
+ strcmp(type, "s64"))
+ return val;
+
+ if (strcmp(type, "s8") == 0)
+ return (unsigned long long)(char)val & 0xff;
+
+ if (strcmp(type, "s16") == 0)
+ return (unsigned long long)(short)val & 0xffff;
+
+ if (strcmp(type, "s32") == 0)
+ return (unsigned long long)(int)val & 0xffffffff;
+
+ if (strncmp(type, "unsigned ", 9) == 0) {
+ sign = 0;
+ type += 9;
+ }
+
+ if (strcmp(type, "char") == 0) {
+ if (sign)
+ return (unsigned long long)(char)val & 0xff;
+ else
+ return val & 0xff;
+ }
+
+ if (strcmp(type, "short") == 0) {
+ if (sign)
+ return (unsigned long long)(short)val & 0xffff;
+ else
+ return val & 0xffff;
+ }
+
+ if (strcmp(type, "int") == 0) {
+ if (sign)
+ return (unsigned long long)(int)val & 0xffffffff;
+ else
+ return val & 0xffffffff;
+ }
+
+ return val;
+}
+
+/*
+ * Try to figure out the type.
+ */
+static unsigned long long
+eval_type(unsigned long long val, struct print_arg *arg, int pointer)
+{
+ if (arg->type != PRINT_TYPE) {
+ do_warning("expected type argument");
+ return 0;
+ }
+
+ return eval_type_str(val, arg->typecast.type, pointer);
+}
+
+static int arg_num_eval(struct print_arg *arg, long long *val)
+{
+ long long left, right;
+ int ret = 1;
+
+ switch (arg->type) {
+ case PRINT_ATOM:
+ *val = strtoll(arg->atom.atom, NULL, 0);
+ break;
+ case PRINT_TYPE:
+ ret = arg_num_eval(arg->typecast.item, val);
+ if (!ret)
+ break;
+ *val = eval_type(*val, arg, 0);
+ break;
+ case PRINT_OP:
+ switch (arg->op.op[0]) {
+ case '|':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ if (arg->op.op[1])
+ *val = left || right;
+ else
+ *val = left | right;
+ break;
+ case '&':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ if (arg->op.op[1])
+ *val = left && right;
+ else
+ *val = left & right;
+ break;
+ case '<':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ switch (arg->op.op[1]) {
+ case 0:
+ *val = left < right;
+ break;
+ case '<':
+ *val = left << right;
+ break;
+ case '=':
+ *val = left <= right;
+ break;
+ default:
+ do_warning("unknown op '%s'", arg->op.op);
+ ret = 0;
+ }
+ break;
+ case '>':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ switch (arg->op.op[1]) {
+ case 0:
+ *val = left > right;
+ break;
+ case '>':
+ *val = left >> right;
+ break;
+ case '=':
+ *val = left >= right;
+ break;
+ default:
+ do_warning("unknown op '%s'", arg->op.op);
+ ret = 0;
+ }
+ break;
+ case '=':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+
+ if (arg->op.op[1] != '=') {
+ do_warning("unknown op '%s'", arg->op.op);
+ ret = 0;
+ } else
+ *val = left == right;
+ break;
+ case '!':
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+
+ switch (arg->op.op[1]) {
+ case '=':
+ *val = left != right;
+ break;
+ default:
+ do_warning("unknown op '%s'", arg->op.op);
+ ret = 0;
+ }
+ break;
+ case '-':
+ /* check for negative */
+ if (arg->op.left->type == PRINT_NULL)
+ left = 0;
+ else
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ *val = left - right;
+ break;
+ case '+':
+ if (arg->op.left->type == PRINT_NULL)
+ left = 0;
+ else
+ ret = arg_num_eval(arg->op.left, &left);
+ if (!ret)
+ break;
+ ret = arg_num_eval(arg->op.right, &right);
+ if (!ret)
+ break;
+ *val = left + right;
+ break;
+ default:
+ do_warning("unknown op '%s'", arg->op.op);
+ ret = 0;
+ }
+ break;
+
+ case PRINT_NULL:
+ case PRINT_FIELD ... PRINT_SYMBOL:
+ case PRINT_STRING:
+ case PRINT_BSTRING:
+ case PRINT_BITMASK:
+ default:
+ do_warning("invalid eval type %d", arg->type);
+ ret = 0;
+
+ }
+ return ret;
+}
+
+static char *arg_eval (struct print_arg *arg)
+{
+ long long val;
+ static char buf[20];
+
+ switch (arg->type) {
+ case PRINT_ATOM:
+ return arg->atom.atom;
+ case PRINT_TYPE:
+ return arg_eval(arg->typecast.item);
+ case PRINT_OP:
+ if (!arg_num_eval(arg, &val))
+ break;
+ sprintf(buf, "%lld", val);
+ return buf;
+
+ case PRINT_NULL:
+ case PRINT_FIELD ... PRINT_SYMBOL:
+ case PRINT_STRING:
+ case PRINT_BSTRING:
+ case PRINT_BITMASK:
+ default:
+ do_warning("invalid eval type %d", arg->type);
+ break;
+ }
+
+ return NULL;
+}
+
+static enum event_type
+process_fields(struct event_format *event, struct print_flag_sym **list, char **tok)
+{
+ enum event_type type;
+ struct print_arg *arg = NULL;
+ struct print_flag_sym *field;
+ char *token = *tok;
+ char *value;
+
+ do {
+ free_token(token);
+ type = read_token_item(&token);
+ if (test_type_token(type, token, EVENT_OP, "{"))
+ break;
+
+ arg = alloc_arg();
+ if (!arg)
+ goto out_free;
+
+ free_token(token);
+ type = process_arg(event, arg, &token);
+
+ if (type == EVENT_OP)
+ type = process_op(event, arg, &token);
+
+ if (type == EVENT_ERROR)
+ goto out_free;
+
+ if (test_type_token(type, token, EVENT_DELIM, ","))
+ goto out_free;
+
+ field = calloc(1, sizeof(*field));
+ if (!field)
+ goto out_free;
+
+ value = arg_eval(arg);
+ if (value == NULL)
+ goto out_free_field;
+ field->value = strdup(value);
+ if (field->value == NULL)
+ goto out_free_field;
+
+ free_arg(arg);
+ arg = alloc_arg();
+ if (!arg)
+ goto out_free;
+
+ free_token(token);
+ type = process_arg(event, arg, &token);
+ if (test_type_token(type, token, EVENT_OP, "}"))
+ goto out_free_field;
+
+ value = arg_eval(arg);
+ if (value == NULL)
+ goto out_free_field;
+ field->str = strdup(value);
+ if (field->str == NULL)
+ goto out_free_field;
+ free_arg(arg);
+ arg = NULL;
+
+ *list = field;
+ list = &field->next;
+
+ free_token(token);
+ type = read_token_item(&token);
+ } while (type == EVENT_DELIM && strcmp(token, ",") == 0);
+
+ *tok = token;
+ return type;
+
+out_free_field:
+ free_flag_sym(field);
+out_free:
+ free_arg(arg);
+ free_token(token);
+ *tok = NULL;
+
+ return EVENT_ERROR;
+}
+
+static enum event_type
+process_flags(struct event_format *event, struct print_arg *arg, char **tok)
+{
+ struct print_arg *field;
+ enum event_type type;
+ char *token = NULL;
+
+ memset(arg, 0, sizeof(*arg));
+ arg->type = PRINT_FLAGS;
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ goto out_free;
+ }
+
+ type = process_field_arg(event, field, &token);
+
+ /* Handle operations in the first argument */
+ while (type == EVENT_OP)
+ type = process_op(event, field, &token);
+
+ if (test_type_token(type, token, EVENT_DELIM, ","))
+ goto out_free_field;
+ free_token(token);
+
+ arg->flags.field = field;
+
+ type = read_token_item(&token);
+ if (event_item_type(type)) {
+ arg->flags.delim = token;
+ type = read_token_item(&token);
+ }
+
+ if (test_type_token(type, token, EVENT_DELIM, ","))
+ goto out_free;
+
+ type = process_fields(event, &arg->flags.flags, &token);
+ if (test_type_token(type, token, EVENT_DELIM, ")"))
+ goto out_free;
+
+ free_token(token);
+ type = read_token_item(tok);
+ return type;
+
+out_free_field:
+ free_arg(field);
+out_free:
+ free_token(token);
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
+static enum event_type
+process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
+{
+ struct print_arg *field;
+ enum event_type type;
+ char *token = NULL;
+
+ memset(arg, 0, sizeof(*arg));
+ arg->type = PRINT_SYMBOL;
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ goto out_free;
+ }
+
+ type = process_field_arg(event, field, &token);
+
+ if (test_type_token(type, token, EVENT_DELIM, ","))
+ goto out_free_field;
+
+ arg->symbol.field = field;
+
+ type = process_fields(event, &arg->symbol.symbols, &token);
+ if (test_type_token(type, token, EVENT_DELIM, ")"))
+ goto out_free;
+
+ free_token(token);
+ type = read_token_item(tok);
+ return type;
+
+out_free_field:
+ free_arg(field);
+out_free:
+ free_token(token);
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
+static enum event_type
+process_hex(struct event_format *event, struct print_arg *arg, char **tok)
+{
+ struct print_arg *field;
+ enum event_type type;
+ char *token = NULL;
+
+ memset(arg, 0, sizeof(*arg));
+ arg->type = PRINT_HEX;
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ goto out_free;
+ }
+
+ type = process_arg(event, field, &token);
+
+ if (test_type_token(type, token, EVENT_DELIM, ","))
+ goto out_free;
+
+ arg->hex.field = field;
+
+ free_token(token);
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ *tok = NULL;
+ return EVENT_ERROR;
+ }
+
+ type = process_arg(event, field, &token);
+
+ if (test_type_token(type, token, EVENT_DELIM, ")"))
+ goto out_free;
+
+ arg->hex.size = field;
+
+ free_token(token);
+ type = read_token_item(tok);
+ return type;
+
+ out_free:
+ free_arg(field);
+ free_token(token);
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
+static enum event_type
+process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
+{
+ struct format_field *field;
+ enum event_type type;
+ char *token;
+
+ memset(arg, 0, sizeof(*arg));
+ arg->type = PRINT_DYNAMIC_ARRAY;
+
+ /*
+ * The item within the parenthesis is another field that holds
+ * the index into where the array starts.
+ */
+ type = read_token(&token);
+ *tok = token;
+ if (type != EVENT_ITEM)
+ goto out_free;
+
+ /* Find the field */
+
+ field = pevent_find_field(event, token);
+ if (!field)
+ goto out_free;
+
+ arg->dynarray.field = field;
+ arg->dynarray.index = 0;
+
+ if (read_expected(EVENT_DELIM, ")") < 0)
+ goto out_free;
+
+ free_token(token);
+ type = read_token_item(&token);
+ *tok = token;
+ if (type != EVENT_OP || strcmp(token, "[") != 0)
+ return type;
+
+ free_token(token);
+ arg = alloc_arg();
+ if (!arg) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ *tok = NULL;
+ return EVENT_ERROR;
+ }
+
+ type = process_arg(event, arg, &token);
+ if (type == EVENT_ERROR)
+ goto out_free_arg;
+
+ if (!test_type_token(type, token, EVENT_OP, "]"))
+ goto out_free_arg;
+
+ free_token(token);
+ type = read_token_item(tok);
+ return type;
+
+ out_free_arg:
+ free_arg(arg);
+ out_free:
+ free_token(token);
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
+static enum event_type
+process_paren(struct event_format *event, struct print_arg *arg, char **tok)
+{
+ struct print_arg *item_arg;
+ enum event_type type;
+ char *token;
+
+ type = process_arg(event, arg, &token);
+
+ if (type == EVENT_ERROR)
+ goto out_free;
+
+ if (type == EVENT_OP)
+ type = process_op(event, arg, &token);
+
+ if (type == EVENT_ERROR)
+ goto out_free;
+
+ if (test_type_token(type, token, EVENT_DELIM, ")"))
+ goto out_free;
+
+ free_token(token);
+ type = read_token_item(&token);
+
+ /*
+ * If the next token is an item or another open paren, then
+ * this was a typecast.
+ */
+ if (event_item_type(type) ||
+ (type == EVENT_DELIM && strcmp(token, "(") == 0)) {
+
+ /* make this a typecast and contine */
+
+ /* prevous must be an atom */
+ if (arg->type != PRINT_ATOM) {
+ do_warning_event(event, "previous needed to be PRINT_ATOM");
+ goto out_free;
+ }
+
+ item_arg = alloc_arg();
+ if (!item_arg) {
+ do_warning_event(event, "%s: not enough memory!",
+ __func__);
+ goto out_free;
+ }
+
+ arg->type = PRINT_TYPE;
+ arg->typecast.type = arg->atom.atom;
+ arg->typecast.item = item_arg;
+ type = process_arg_token(event, item_arg, &token, type);
+
+ }
+
+ *tok = token;
+ return type;
+
+ out_free:
+ free_token(token);
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
+
+static enum event_type
+process_str(struct event_format *event __maybe_unused, struct print_arg *arg,
+ char **tok)
+{
+ enum event_type type;
+ char *token;
+
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto out_free;
+
+ arg->type = PRINT_STRING;
+ arg->string.string = token;
+ arg->string.offset = -1;
+
+ if (read_expected(EVENT_DELIM, ")") < 0)
+ goto out_err;
+
+ type = read_token(&token);
+ *tok = token;
+
+ return type;
+
+ out_free:
+ free_token(token);
+ out_err:
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
+static enum event_type
+process_bitmask(struct event_format *event __maybe_unused, struct print_arg *arg,
+ char **tok)
+{
+ enum event_type type;
+ char *token;
+
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto out_free;
+
+ arg->type = PRINT_BITMASK;
+ arg->bitmask.bitmask = token;
+ arg->bitmask.offset = -1;
+
+ if (read_expected(EVENT_DELIM, ")") < 0)
+ goto out_err;
+
+ type = read_token(&token);
+ *tok = token;
+
+ return type;
+
+ out_free:
+ free_token(token);
+ out_err:
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
+static struct pevent_function_handler *
+find_func_handler(struct pevent *pevent, char *func_name)
+{
+ struct pevent_function_handler *func;
+
+ if (!pevent)
+ return NULL;
+
+ for (func = pevent->func_handlers; func; func = func->next) {
+ if (strcmp(func->name, func_name) == 0)
+ break;
+ }
+
+ return func;
+}
+
+static void remove_func_handler(struct pevent *pevent, char *func_name)
+{
+ struct pevent_function_handler *func;
+ struct pevent_function_handler **next;
+
+ next = &pevent->func_handlers;
+ while ((func = *next)) {
+ if (strcmp(func->name, func_name) == 0) {
+ *next = func->next;
+ free_func_handle(func);
+ break;
+ }
+ next = &func->next;
+ }
+}
+
+static enum event_type
+process_func_handler(struct event_format *event, struct pevent_function_handler *func,
+ struct print_arg *arg, char **tok)
+{
+ struct print_arg **next_arg;
+ struct print_arg *farg;
+ enum event_type type;
+ char *token;
+ int i;
+
+ arg->type = PRINT_FUNC;
+ arg->func.func = func;
+
+ *tok = NULL;
+
+ next_arg = &(arg->func.args);
+ for (i = 0; i < func->nr_args; i++) {
+ farg = alloc_arg();
+ if (!farg) {
+ do_warning_event(event, "%s: not enough memory!",
+ __func__);
+ return EVENT_ERROR;
+ }
+
+ type = process_arg(event, farg, &token);
+ if (i < (func->nr_args - 1)) {
+ if (type != EVENT_DELIM || strcmp(token, ",") != 0) {
+ do_warning_event(event,
+ "Error: function '%s()' expects %d arguments but event %s only uses %d",
+ func->name, func->nr_args,
+ event->name, i + 1);
+ goto err;
+ }
+ } else {
+ if (type != EVENT_DELIM || strcmp(token, ")") != 0) {
+ do_warning_event(event,
+ "Error: function '%s()' only expects %d arguments but event %s has more",
+ func->name, func->nr_args, event->name);
+ goto err;
+ }
+ }
+
+ *next_arg = farg;
+ next_arg = &(farg->next);
+ free_token(token);
+ }
+
+ type = read_token(&token);
+ *tok = token;
+
+ return type;
+
+err:
+ free_arg(farg);
+ free_token(token);
+ return EVENT_ERROR;
+}
+
+static enum event_type
+process_function(struct event_format *event, struct print_arg *arg,
+ char *token, char **tok)
+{
+ struct pevent_function_handler *func;
+
+ if (strcmp(token, "__print_flags") == 0) {
+ free_token(token);
+ is_flag_field = 1;
+ return process_flags(event, arg, tok);
+ }
+ if (strcmp(token, "__print_symbolic") == 0) {
+ free_token(token);
+ is_symbolic_field = 1;
+ return process_symbols(event, arg, tok);
+ }
+ if (strcmp(token, "__print_hex") == 0) {
+ free_token(token);
+ return process_hex(event, arg, tok);
+ }
+ if (strcmp(token, "__get_str") == 0) {
+ free_token(token);
+ return process_str(event, arg, tok);
+ }
+ if (strcmp(token, "__get_bitmask") == 0) {
+ free_token(token);
+ return process_bitmask(event, arg, tok);
+ }
+ if (strcmp(token, "__get_dynamic_array") == 0) {
+ free_token(token);
+ return process_dynamic_array(event, arg, tok);
+ }
+
+ func = find_func_handler(event->pevent, token);
+ if (func) {
+ free_token(token);
+ return process_func_handler(event, func, arg, tok);
+ }
+
+ do_warning_event(event, "function %s not defined", token);
+ free_token(token);
+ return EVENT_ERROR;
+}
+
+static enum event_type
+process_arg_token(struct event_format *event, struct print_arg *arg,
+ char **tok, enum event_type type)
+{
+ char *token;
+ char *atom;
+
+ token = *tok;
+
+ switch (type) {
+ case EVENT_ITEM:
+ if (strcmp(token, "REC") == 0) {
+ free_token(token);
+ type = process_entry(event, arg, &token);
+ break;
+ }
+ atom = token;
+ /* test the next token */
+ type = read_token_item(&token);
+
+ /*
+ * If the next token is a parenthesis, then this
+ * is a function.
+ */
+ if (type == EVENT_DELIM && strcmp(token, "(") == 0) {
+ free_token(token);
+ token = NULL;
+ /* this will free atom. */
+ type = process_function(event, arg, atom, &token);
+ break;
+ }
+ /* atoms can be more than one token long */
+ while (type == EVENT_ITEM) {
+ char *new_atom;
+ new_atom = realloc(atom,
+ strlen(atom) + strlen(token) + 2);
+ if (!new_atom) {
+ free(atom);
+ *tok = NULL;
+ free_token(token);
+ return EVENT_ERROR;
+ }
+ atom = new_atom;
+ strcat(atom, " ");
+ strcat(atom, token);
+ free_token(token);
+ type = read_token_item(&token);
+ }
+
+ arg->type = PRINT_ATOM;
+ arg->atom.atom = atom;
+ break;
+
+ case EVENT_DQUOTE:
+ case EVENT_SQUOTE:
+ arg->type = PRINT_ATOM;
+ arg->atom.atom = token;
+ type = read_token_item(&token);
+ break;
+ case EVENT_DELIM:
+ if (strcmp(token, "(") == 0) {
+ free_token(token);
+ type = process_paren(event, arg, &token);
+ break;
+ }
+ case EVENT_OP:
+ /* handle single ops */
+ arg->type = PRINT_OP;
+ arg->op.op = token;
+ arg->op.left = NULL;
+ type = process_op(event, arg, &token);
+
+ /* On error, the op is freed */
+ if (type == EVENT_ERROR)
+ arg->op.op = NULL;
+
+ /* return error type if errored */
+ break;
+
+ case EVENT_ERROR ... EVENT_NEWLINE:
+ default:
+ do_warning_event(event, "unexpected type %d", type);
+ return EVENT_ERROR;
+ }
+ *tok = token;
+
+ return type;
+}
+
+static int event_read_print_args(struct event_format *event, struct print_arg **list)
+{
+ enum event_type type = EVENT_ERROR;
+ struct print_arg *arg;
+ char *token;
+ int args = 0;
+
+ do {
+ if (type == EVENT_NEWLINE) {
+ type = read_token_item(&token);
+ continue;
+ }
+
+ arg = alloc_arg();
+ if (!arg) {
+ do_warning_event(event, "%s: not enough memory!",
+ __func__);
+ return -1;
+ }
+
+ type = process_arg(event, arg, &token);
+
+ if (type == EVENT_ERROR) {
+ free_token(token);
+ free_arg(arg);
+ return -1;
+ }
+
+ *list = arg;
+ args++;
+
+ if (type == EVENT_OP) {
+ type = process_op(event, arg, &token);
+ free_token(token);
+ if (type == EVENT_ERROR) {
+ *list = NULL;
+ free_arg(arg);
+ return -1;
+ }
+ list = &arg->next;
+ continue;
+ }
+
+ if (type == EVENT_DELIM && strcmp(token, ",") == 0) {
+ free_token(token);
+ *list = arg;
+ list = &arg->next;
+ continue;
+ }
+ break;
+ } while (type != EVENT_NONE);
+
+ if (type != EVENT_NONE && type != EVENT_ERROR)
+ free_token(token);
+
+ return args;
+}
+
+static int event_read_print(struct event_format *event)
+{
+ enum event_type type;
+ char *token;
+ int ret;
+
+ if (read_expected_item(EVENT_ITEM, "print") < 0)
+ return -1;
+
+ if (read_expected(EVENT_ITEM, "fmt") < 0)
+ return -1;
+
+ if (read_expected(EVENT_OP, ":") < 0)
+ return -1;
+
+ if (read_expect_type(EVENT_DQUOTE, &token) < 0)
+ goto fail;
+
+ concat:
+ event->print_fmt.format = token;
+ event->print_fmt.args = NULL;
+
+ /* ok to have no arg */
+ type = read_token_item(&token);
+
+ if (type == EVENT_NONE)
+ return 0;
+
+ /* Handle concatenation of print lines */
+ if (type == EVENT_DQUOTE) {
+ char *cat;
+
+ if (asprintf(&cat, "%s%s", event->print_fmt.format, token) < 0)
+ goto fail;
+ free_token(token);
+ free_token(event->print_fmt.format);
+ event->print_fmt.format = NULL;
+ token = cat;
+ goto concat;
+ }
+
+ if (test_type_token(type, token, EVENT_DELIM, ","))
+ goto fail;
+
+ free_token(token);
+
+ ret = event_read_print_args(event, &event->print_fmt.args);
+ if (ret < 0)
+ return -1;
+
+ return ret;
+
+ fail:
+ free_token(token);
+ return -1;
+}
+
+/**
+ * pevent_find_common_field - return a common field by event
+ * @event: handle for the event
+ * @name: the name of the common field to return
+ *
+ * Returns a common field from the event by the given @name.
+ * This only searchs the common fields and not all field.
+ */
+struct format_field *
+pevent_find_common_field(struct event_format *event, const char *name)
+{
+ struct format_field *format;
+
+ for (format = event->format.common_fields;
+ format; format = format->next) {
+ if (strcmp(format->name, name) == 0)
+ break;
+ }
+
+ return format;
+}
+
+/**
+ * pevent_find_field - find a non-common field
+ * @event: handle for the event
+ * @name: the name of the non-common field
+ *
+ * Returns a non-common field by the given @name.
+ * This does not search common fields.
+ */
+struct format_field *
+pevent_find_field(struct event_format *event, const char *name)
+{
+ struct format_field *format;
+
+ for (format = event->format.fields;
+ format; format = format->next) {
+ if (strcmp(format->name, name) == 0)
+ break;
+ }
+
+ return format;
+}
+
+/**
+ * pevent_find_any_field - find any field by name
+ * @event: handle for the event
+ * @name: the name of the field
+ *
+ * Returns a field by the given @name.
+ * This searchs the common field names first, then
+ * the non-common ones if a common one was not found.
+ */
+struct format_field *
+pevent_find_any_field(struct event_format *event, const char *name)
+{
+ struct format_field *format;
+
+ format = pevent_find_common_field(event, name);
+ if (format)
+ return format;
+ return pevent_find_field(event, name);
+}
+
+/**
+ * pevent_read_number - read a number from data
+ * @pevent: handle for the pevent
+ * @ptr: the raw data
+ * @size: the size of the data that holds the number
+ *
+ * Returns the number (converted to host) from the
+ * raw data.
+ */
+unsigned long long pevent_read_number(struct pevent *pevent,
+ const void *ptr, int size)
+{
+ switch (size) {
+ case 1:
+ return *(unsigned char *)ptr;
+ case 2:
+ return data2host2(pevent, ptr);
+ case 4:
+ return data2host4(pevent, ptr);
+ case 8:
+ return data2host8(pevent, ptr);
+ default:
+ /* BUG! */
+ return 0;
+ }
+}
+
+/**
+ * pevent_read_number_field - read a number from data
+ * @field: a handle to the field
+ * @data: the raw data to read
+ * @value: the value to place the number in
+ *
+ * Reads raw data according to a field offset and size,
+ * and translates it into @value.
+ *
+ * Returns 0 on success, -1 otherwise.
+ */
+int pevent_read_number_field(struct format_field *field, const void *data,
+ unsigned long long *value)
+{
+ if (!field)
+ return -1;
+ switch (field->size) {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ *value = pevent_read_number(field->event->pevent,
+ data + field->offset, field->size);
+ return 0;
+ default:
+ return -1;
+ }
+}
+
+static int get_common_info(struct pevent *pevent,
+ const char *type, int *offset, int *size)
+{
+ struct event_format *event;
+ struct format_field *field;
+
+ /*
+ * All events should have the same common elements.
+ * Pick any event to find where the type is;
+ */
+ if (!pevent->events) {
+ do_warning("no event_list!");
+ return -1;
+ }
+
+ event = pevent->events[0];
+ field = pevent_find_common_field(event, type);
+ if (!field)
+ return -1;
+
+ *offset = field->offset;
+ *size = field->size;
+
+ return 0;
+}
+
+static int __parse_common(struct pevent *pevent, void *data,
+ int *size, int *offset, const char *name)
+{
+ int ret;
+
+ if (!*size) {
+ ret = get_common_info(pevent, name, offset, size);
+ if (ret < 0)
+ return ret;
+ }
+ return pevent_read_number(pevent, data + *offset, *size);
+}
+
+static int trace_parse_common_type(struct pevent *pevent, void *data)
+{
+ return __parse_common(pevent, data,
+ &pevent->type_size, &pevent->type_offset,
+ "common_type");
+}
+
+static int parse_common_pid(struct pevent *pevent, void *data)
+{
+ return __parse_common(pevent, data,
+ &pevent->pid_size, &pevent->pid_offset,
+ "common_pid");
+}
+
+static int parse_common_pc(struct pevent *pevent, void *data)
+{
+ return __parse_common(pevent, data,
+ &pevent->pc_size, &pevent->pc_offset,
+ "common_preempt_count");
+}
+
+static int parse_common_flags(struct pevent *pevent, void *data)
+{
+ return __parse_common(pevent, data,
+ &pevent->flags_size, &pevent->flags_offset,
+ "common_flags");
+}
+
+static int parse_common_lock_depth(struct pevent *pevent, void *data)
+{
+ return __parse_common(pevent, data,
+ &pevent->ld_size, &pevent->ld_offset,
+ "common_lock_depth");
+}
+
+static int parse_common_migrate_disable(struct pevent *pevent, void *data)
+{
+ return __parse_common(pevent, data,
+ &pevent->ld_size, &pevent->ld_offset,
+ "common_migrate_disable");
+}
+
+static int events_id_cmp(const void *a, const void *b);
+
+/**
+ * pevent_find_event - find an event by given id
+ * @pevent: a handle to the pevent
+ * @id: the id of the event
+ *
+ * Returns an event that has a given @id.
+ */
+struct event_format *pevent_find_event(struct pevent *pevent, int id)
+{
+ struct event_format **eventptr;
+ struct event_format key;
+ struct event_format *pkey = &key;
+
+ /* Check cache first */
+ if (pevent->last_event && pevent->last_event->id == id)
+ return pevent->last_event;
+
+ key.id = id;
+
+ eventptr = bsearch(&pkey, pevent->events, pevent->nr_events,
+ sizeof(*pevent->events), events_id_cmp);
+
+ if (eventptr) {
+ pevent->last_event = *eventptr;
+ return *eventptr;
+ }
+
+ return NULL;
+}
+
+/**
+ * pevent_find_event_by_name - find an event by given name
+ * @pevent: a handle to the pevent
+ * @sys: the system name to search for
+ * @name: the name of the event to search for
+ *
+ * This returns an event with a given @name and under the system
+ * @sys. If @sys is NULL the first event with @name is returned.
+ */
+struct event_format *
+pevent_find_event_by_name(struct pevent *pevent,
+ const char *sys, const char *name)
+{
+ struct event_format *event = NULL;
+ int i;
+
+ if (pevent->last_event &&
+ strcmp(pevent->last_event->name, name) == 0 &&
+ (!sys || strcmp(pevent->last_event->system, sys) == 0))
+ return pevent->last_event;
+
+ for (i = 0; i < pevent->nr_events; i++) {
+ event = pevent->events[i];
+ if (strcmp(event->name, name) == 0) {
+ if (!sys)
+ break;
+ if (strcmp(event->system, sys) == 0)
+ break;
+ }
+ }
+ if (i == pevent->nr_events)
+ event = NULL;
+
+ pevent->last_event = event;
+ return event;
+}
+
+static unsigned long long
+eval_num_arg(void *data, int size, struct event_format *event, struct print_arg *arg)
+{
+ struct pevent *pevent = event->pevent;
+ unsigned long long val = 0;
+ unsigned long long left, right;
+ struct print_arg *typearg = NULL;
+ struct print_arg *larg;
+ unsigned long offset;
+ unsigned int field_size;
+
+ switch (arg->type) {
+ case PRINT_NULL:
+ /* ?? */
+ return 0;
+ case PRINT_ATOM:
+ return strtoull(arg->atom.atom, NULL, 0);
+ case PRINT_FIELD:
+ if (!arg->field.field) {
+ arg->field.field = pevent_find_any_field(event, arg->field.name);
+ if (!arg->field.field)
+ goto out_warning_field;
+
+ }
+ /* must be a number */
+ val = pevent_read_number(pevent, data + arg->field.field->offset,
+ arg->field.field->size);
+ break;
+ case PRINT_FLAGS:
+ case PRINT_SYMBOL:
+ case PRINT_HEX:
+ break;
+ case PRINT_TYPE:
+ val = eval_num_arg(data, size, event, arg->typecast.item);
+ return eval_type(val, arg, 0);
+ case PRINT_STRING:
+ case PRINT_BSTRING:
+ case PRINT_BITMASK:
+ return 0;
+ case PRINT_FUNC: {
+ struct trace_seq s;
+ trace_seq_init(&s);
+ val = process_defined_func(&s, data, size, event, arg);
+ trace_seq_destroy(&s);
+ return val;
+ }
+ case PRINT_OP:
+ if (strcmp(arg->op.op, "[") == 0) {
+ /*
+ * Arrays are special, since we don't want
+ * to read the arg as is.
+ */
+ right = eval_num_arg(data, size, event, arg->op.right);
+
+ /* handle typecasts */
+ larg = arg->op.left;
+ while (larg->type == PRINT_TYPE) {
+ if (!typearg)
+ typearg = larg;
+ larg = larg->typecast.item;
+ }
+
+ /* Default to long size */
+ field_size = pevent->long_size;
+
+ switch (larg->type) {
+ case PRINT_DYNAMIC_ARRAY:
+ offset = pevent_read_number(pevent,
+ data + larg->dynarray.field->offset,
+ larg->dynarray.field->size);
+ if (larg->dynarray.field->elementsize)
+ field_size = larg->dynarray.field->elementsize;
+ /*
+ * The actual length of the dynamic array is stored
+ * in the top half of the field, and the offset
+ * is in the bottom half of the 32 bit field.
+ */
+ offset &= 0xffff;
+ offset += right;
+ break;
+ case PRINT_FIELD:
+ if (!larg->field.field) {
+ larg->field.field =
+ pevent_find_any_field(event, larg->field.name);
+ if (!larg->field.field) {
+ arg = larg;
+ goto out_warning_field;
+ }
+ }
+ field_size = larg->field.field->elementsize;
+ offset = larg->field.field->offset +
+ right * larg->field.field->elementsize;
+ break;
+ default:
+ goto default_op; /* oops, all bets off */
+ }
+ val = pevent_read_number(pevent,
+ data + offset, field_size);
+ if (typearg)
+ val = eval_type(val, typearg, 1);
+ break;
+ } else if (strcmp(arg->op.op, "?") == 0) {
+ left = eval_num_arg(data, size, event, arg->op.left);
+ arg = arg->op.right;
+ if (left)
+ val = eval_num_arg(data, size, event, arg->op.left);
+ else
+ val = eval_num_arg(data, size, event, arg->op.right);
+ break;
+ }
+ default_op:
+ left = eval_num_arg(data, size, event, arg->op.left);
+ right = eval_num_arg(data, size, event, arg->op.right);
+ switch (arg->op.op[0]) {
+ case '!':
+ switch (arg->op.op[1]) {
+ case 0:
+ val = !right;
+ break;
+ case '=':
+ val = left != right;
+ break;
+ default:
+ goto out_warning_op;
+ }
+ break;
+ case '~':
+ val = ~right;
+ break;
+ case '|':
+ if (arg->op.op[1])
+ val = left || right;
+ else
+ val = left | right;
+ break;
+ case '&':
+ if (arg->op.op[1])
+ val = left && right;
+ else
+ val = left & right;
+ break;
+ case '<':
+ switch (arg->op.op[1]) {
+ case 0:
+ val = left < right;
+ break;
+ case '<':
+ val = left << right;
+ break;
+ case '=':
+ val = left <= right;
+ break;
+ default:
+ goto out_warning_op;
+ }
+ break;
+ case '>':
+ switch (arg->op.op[1]) {
+ case 0:
+ val = left > right;
+ break;
+ case '>':
+ val = left >> right;
+ break;
+ case '=':
+ val = left >= right;
+ break;
+ default:
+ goto out_warning_op;
+ }
+ break;
+ case '=':
+ if (arg->op.op[1] != '=')
+ goto out_warning_op;
+
+ val = left == right;
+ break;
+ case '-':
+ val = left - right;
+ break;
+ case '+':
+ val = left + right;
+ break;
+ case '/':
+ val = left / right;
+ break;
+ case '*':
+ val = left * right;
+ break;
+ default:
+ goto out_warning_op;
+ }
+ break;
+ case PRINT_DYNAMIC_ARRAY:
+ /* Without [], we pass the address to the dynamic data */
+ offset = pevent_read_number(pevent,
+ data + arg->dynarray.field->offset,
+ arg->dynarray.field->size);
+ /*
+ * The actual length of the dynamic array is stored
+ * in the top half of the field, and the offset
+ * is in the bottom half of the 32 bit field.
+ */
+ offset &= 0xffff;
+ val = (unsigned long long)((unsigned long)data + offset);
+ break;
+ default: /* not sure what to do there */
+ return 0;
+ }
+ return val;
+
+out_warning_op:
+ do_warning_event(event, "%s: unknown op '%s'", __func__, arg->op.op);
+ return 0;
+
+out_warning_field:
+ do_warning_event(event, "%s: field %s not found",
+ __func__, arg->field.name);
+ return 0;
+}
+
+struct flag {
+ const char *name;
+ unsigned long long value;
+};
+
+static const struct flag flags[] = {
+ { "HI_SOFTIRQ", 0 },
+ { "TIMER_SOFTIRQ", 1 },
+ { "NET_TX_SOFTIRQ", 2 },
+ { "NET_RX_SOFTIRQ", 3 },
+ { "BLOCK_SOFTIRQ", 4 },
+ { "BLOCK_IOPOLL_SOFTIRQ", 5 },
+ { "TASKLET_SOFTIRQ", 6 },
+ { "SCHED_SOFTIRQ", 7 },
+ { "HRTIMER_SOFTIRQ", 8 },
+ { "RCU_SOFTIRQ", 9 },
+
+ { "HRTIMER_NORESTART", 0 },
+ { "HRTIMER_RESTART", 1 },
+};
+
+static unsigned long long eval_flag(const char *flag)
+{
+ int i;
+
+ /*
+ * Some flags in the format files do not get converted.
+ * If the flag is not numeric, see if it is something that
+ * we already know about.
+ */
+ if (isdigit(flag[0]))
+ return strtoull(flag, NULL, 0);
+
+ for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
+ if (strcmp(flags[i].name, flag) == 0)
+ return flags[i].value;
+
+ return 0;
+}
+
+static void print_str_to_seq(struct trace_seq *s, const char *format,
+ int len_arg, const char *str)
+{
+ if (len_arg >= 0)
+ trace_seq_printf(s, format, len_arg, str);
+ else
+ trace_seq_printf(s, format, str);
+}
+
+static void print_bitmask_to_seq(struct pevent *pevent,
+ struct trace_seq *s, const char *format,
+ int len_arg, const void *data, int size)
+{
+ int nr_bits = size * 8;
+ int str_size = (nr_bits + 3) / 4;
+ int len = 0;
+ char buf[3];
+ char *str;
+ int index;
+ int i;
+
+ /*
+ * The kernel likes to put in commas every 32 bits, we
+ * can do the same.
+ */
+ str_size += (nr_bits - 1) / 32;
+
+ str = malloc(str_size + 1);
+ if (!str) {
+ do_warning("%s: not enough memory!", __func__);
+ return;
+ }
+ str[str_size] = 0;
+
+ /* Start out with -2 for the two chars per byte */
+ for (i = str_size - 2; i >= 0; i -= 2) {
+ /*
+ * data points to a bit mask of size bytes.
+ * In the kernel, this is an array of long words, thus
+ * endianess is very important.
+ */
+ if (pevent->file_bigendian)
+ index = size - (len + 1);
+ else
+ index = len;
+
+ snprintf(buf, 3, "%02x", *((unsigned char *)data + index));
+ memcpy(str + i, buf, 2);
+ len++;
+ if (!(len & 3) && i > 0) {
+ i--;
+ str[i] = ',';
+ }
+ }
+
+ if (len_arg >= 0)
+ trace_seq_printf(s, format, len_arg, str);
+ else
+ trace_seq_printf(s, format, str);
+
+ free(str);
+}
+
+static void print_str_arg(struct trace_seq *s, void *data, int size,
+ struct event_format *event, const char *format,
+ int len_arg, struct print_arg *arg)
+{
+ struct pevent *pevent = event->pevent;
+ struct print_flag_sym *flag;
+ struct format_field *field;
+ struct printk_map *printk;
+ unsigned long long val, fval;
+ unsigned long addr;
+ char *str;
+ unsigned char *hex;
+ int print;
+ int i, len;
+
+ switch (arg->type) {
+ case PRINT_NULL:
+ /* ?? */
+ return;
+ case PRINT_ATOM:
+ print_str_to_seq(s, format, len_arg, arg->atom.atom);
+ return;
+ case PRINT_FIELD:
+ field = arg->field.field;
+ if (!field) {
+ field = pevent_find_any_field(event, arg->field.name);
+ if (!field) {
+ str = arg->field.name;
+ goto out_warning_field;
+ }
+ arg->field.field = field;
+ }
+ /* Zero sized fields, mean the rest of the data */
+ len = field->size ? : size - field->offset;
+
+ /*
+ * Some events pass in pointers. If this is not an array
+ * and the size is the same as long_size, assume that it
+ * is a pointer.
+ */
+ if (!(field->flags & FIELD_IS_ARRAY) &&
+ field->size == pevent->long_size) {
+ addr = *(unsigned long *)(data + field->offset);
+ /* Check if it matches a print format */
+ printk = find_printk(pevent, addr);
+ if (printk)
+ trace_seq_puts(s, printk->printk);
+ else
+ trace_seq_printf(s, "%lx", addr);
+ break;
+ }
+ str = malloc(len + 1);
+ if (!str) {
+ do_warning_event(event, "%s: not enough memory!",
+ __func__);
+ return;
+ }
+ memcpy(str, data + field->offset, len);
+ str[len] = 0;
+ print_str_to_seq(s, format, len_arg, str);
+ free(str);
+ break;
+ case PRINT_FLAGS:
+ val = eval_num_arg(data, size, event, arg->flags.field);
+ print = 0;
+ for (flag = arg->flags.flags; flag; flag = flag->next) {
+ fval = eval_flag(flag->value);
+ if (!val && !fval) {
+ print_str_to_seq(s, format, len_arg, flag->str);
+ break;
+ }
+ if (fval && (val & fval) == fval) {
+ if (print && arg->flags.delim)
+ trace_seq_puts(s, arg->flags.delim);
+ print_str_to_seq(s, format, len_arg, flag->str);
+ print = 1;
+ val &= ~fval;
+ }
+ }
+ break;
+ case PRINT_SYMBOL:
+ val = eval_num_arg(data, size, event, arg->symbol.field);
+ for (flag = arg->symbol.symbols; flag; flag = flag->next) {
+ fval = eval_flag(flag->value);
+ if (val == fval) {
+ print_str_to_seq(s, format, len_arg, flag->str);
+ break;
+ }
+ }
+ break;
+ case PRINT_HEX:
+ if (arg->hex.field->type == PRINT_DYNAMIC_ARRAY) {
+ unsigned long offset;
+ offset = pevent_read_number(pevent,
+ data + arg->hex.field->dynarray.field->offset,
+ arg->hex.field->dynarray.field->size);
+ hex = data + (offset & 0xffff);
+ } else {
+ field = arg->hex.field->field.field;
+ if (!field) {
+ str = arg->hex.field->field.name;
+ field = pevent_find_any_field(event, str);
+ if (!field)
+ goto out_warning_field;
+ arg->hex.field->field.field = field;
+ }
+ hex = data + field->offset;
+ }
+ len = eval_num_arg(data, size, event, arg->hex.size);
+ for (i = 0; i < len; i++) {
+ if (i)
+ trace_seq_putc(s, ' ');
+ trace_seq_printf(s, "%02x", hex[i]);
+ }
+ break;
+
+ case PRINT_TYPE:
+ break;
+ case PRINT_STRING: {
+ int str_offset;
+
+ if (arg->string.offset == -1) {
+ struct format_field *f;
+
+ f = pevent_find_any_field(event, arg->string.string);
+ arg->string.offset = f->offset;
+ }
+ str_offset = data2host4(pevent, data + arg->string.offset);
+ str_offset &= 0xffff;
+ print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
+ break;
+ }
+ case PRINT_BSTRING:
+ print_str_to_seq(s, format, len_arg, arg->string.string);
+ break;
+ case PRINT_BITMASK: {
+ int bitmask_offset;
+ int bitmask_size;
+
+ if (arg->bitmask.offset == -1) {
+ struct format_field *f;
+
+ f = pevent_find_any_field(event, arg->bitmask.bitmask);
+ arg->bitmask.offset = f->offset;
+ }
+ bitmask_offset = data2host4(pevent, data + arg->bitmask.offset);
+ bitmask_size = bitmask_offset >> 16;
+ bitmask_offset &= 0xffff;
+ print_bitmask_to_seq(pevent, s, format, len_arg,
+ data + bitmask_offset, bitmask_size);
+ break;
+ }
+ case PRINT_OP:
+ /*
+ * The only op for string should be ? :
+ */
+ if (arg->op.op[0] != '?')
+ return;
+ val = eval_num_arg(data, size, event, arg->op.left);
+ if (val)
+ print_str_arg(s, data, size, event,
+ format, len_arg, arg->op.right->op.left);
+ else
+ print_str_arg(s, data, size, event,
+ format, len_arg, arg->op.right->op.right);
+ break;
+ case PRINT_FUNC:
+ process_defined_func(s, data, size, event, arg);
+ break;
+ default:
+ /* well... */
+ break;
+ }
+
+ return;
+
+out_warning_field:
+ do_warning_event(event, "%s: field %s not found",
+ __func__, arg->field.name);
+}
+
+static unsigned long long
+process_defined_func(struct trace_seq *s, void *data, int size,
+ struct event_format *event, struct print_arg *arg)
+{
+ struct pevent_function_handler *func_handle = arg->func.func;
+ struct pevent_func_params *param;
+ unsigned long long *args;
+ unsigned long long ret;
+ struct print_arg *farg;
+ struct trace_seq str;
+ struct save_str {
+ struct save_str *next;
+ char *str;
+ } *strings = NULL, *string;
+ int i;
+
+ if (!func_handle->nr_args) {
+ ret = (*func_handle->func)(s, NULL);
+ goto out;
+ }
+
+ farg = arg->func.args;
+ param = func_handle->params;
+
+ ret = ULLONG_MAX;
+ args = malloc(sizeof(*args) * func_handle->nr_args);
+ if (!args)
+ goto out;
+
+ for (i = 0; i < func_handle->nr_args; i++) {
+ switch (param->type) {
+ case PEVENT_FUNC_ARG_INT:
+ case PEVENT_FUNC_ARG_LONG:
+ case PEVENT_FUNC_ARG_PTR:
+ args[i] = eval_num_arg(data, size, event, farg);
+ break;
+ case PEVENT_FUNC_ARG_STRING:
+ trace_seq_init(&str);
+ print_str_arg(&str, data, size, event, "%s", -1, farg);
+ trace_seq_terminate(&str);
+ string = malloc(sizeof(*string));
+ if (!string) {
+ do_warning_event(event, "%s(%d): malloc str",
+ __func__, __LINE__);
+ goto out_free;
+ }
+ string->next = strings;
+ string->str = strdup(str.buffer);
+ if (!string->str) {
+ free(string);
+ do_warning_event(event, "%s(%d): malloc str",
+ __func__, __LINE__);
+ goto out_free;
+ }
+ args[i] = (uintptr_t)string->str;
+ strings = string;
+ trace_seq_destroy(&str);
+ break;
+ default:
+ /*
+ * Something went totally wrong, this is not
+ * an input error, something in this code broke.
+ */
+ do_warning_event(event, "Unexpected end of arguments\n");
+ goto out_free;
+ }
+ farg = farg->next;
+ param = param->next;
+ }
+
+ ret = (*func_handle->func)(s, args);
+out_free:
+ free(args);
+ while (strings) {
+ string = strings;
+ strings = string->next;
+ free(string->str);
+ free(string);
+ }
+
+ out:
+ /* TBD : handle return type here */
+ return ret;
+}
+
+static void free_args(struct print_arg *args)
+{
+ struct print_arg *next;
+
+ while (args) {
+ next = args->next;
+
+ free_arg(args);
+ args = next;
+ }
+}
+
+static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
+{
+ struct pevent *pevent = event->pevent;
+ struct format_field *field, *ip_field;
+ struct print_arg *args, *arg, **next;
+ unsigned long long ip, val;
+ char *ptr;
+ void *bptr;
+ int vsize;
+
+ field = pevent->bprint_buf_field;
+ ip_field = pevent->bprint_ip_field;
+
+ if (!field) {
+ field = pevent_find_field(event, "buf");
+ if (!field) {
+ do_warning_event(event, "can't find buffer field for binary printk");
+ return NULL;
+ }
+ ip_field = pevent_find_field(event, "ip");
+ if (!ip_field) {
+ do_warning_event(event, "can't find ip field for binary printk");
+ return NULL;
+ }
+ pevent->bprint_buf_field = field;
+ pevent->bprint_ip_field = ip_field;
+ }
+
+ ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
+
+ /*
+ * The first arg is the IP pointer.
+ */
+ args = alloc_arg();
+ if (!args) {
+ do_warning_event(event, "%s(%d): not enough memory!",
+ __func__, __LINE__);
+ return NULL;
+ }
+ arg = args;
+ arg->next = NULL;
+ next = &arg->next;
+
+ arg->type = PRINT_ATOM;
+
+ if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
+ goto out_free;
+
+ /* skip the first "%pf: " */
+ for (ptr = fmt + 5, bptr = data + field->offset;
+ bptr < data + size && *ptr; ptr++) {
+ int ls = 0;
+
+ if (*ptr == '%') {
+ process_again:
+ ptr++;
+ switch (*ptr) {
+ case '%':
+ break;
+ case 'l':
+ ls++;
+ goto process_again;
+ case 'L':
+ ls = 2;
+ goto process_again;
+ case '0' ... '9':
+ goto process_again;
+ case '.':
+ goto process_again;
+ case 'p':
+ ls = 1;
+ /* fall through */
+ case 'd':
+ case 'u':
+ case 'x':
+ case 'i':
+ switch (ls) {
+ case 0:
+ vsize = 4;
+ break;
+ case 1:
+ vsize = pevent->long_size;
+ break;
+ case 2:
+ vsize = 8;
+ break;
+ default:
+ vsize = ls; /* ? */
+ break;
+ }
+ /* fall through */
+ case '*':
+ if (*ptr == '*')
+ vsize = 4;
+
+ /* the pointers are always 4 bytes aligned */
+ bptr = (void *)(((unsigned long)bptr + 3) &
+ ~3);
+ val = pevent_read_number(pevent, bptr, vsize);
+ bptr += vsize;
+ arg = alloc_arg();
+ if (!arg) {
+ do_warning_event(event, "%s(%d): not enough memory!",
+ __func__, __LINE__);
+ goto out_free;
+ }
+ arg->next = NULL;
+ arg->type = PRINT_ATOM;
+ if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
+ free(arg);
+ goto out_free;
+ }
+ *next = arg;
+ next = &arg->next;
+ /*
+ * The '*' case means that an arg is used as the length.
+ * We need to continue to figure out for what.
+ */
+ if (*ptr == '*')
+ goto process_again;
+
+ break;
+ case 's':
+ arg = alloc_arg();
+ if (!arg) {
+ do_warning_event(event, "%s(%d): not enough memory!",
+ __func__, __LINE__);
+ goto out_free;
+ }
+ arg->next = NULL;
+ arg->type = PRINT_BSTRING;
+ arg->string.string = strdup(bptr);
+ if (!arg->string.string)
+ goto out_free;
+ bptr += strlen(bptr) + 1;
+ *next = arg;
+ next = &arg->next;
+ default:
+ break;
+ }
+ }
+ }
+
+ return args;
+
+out_free:
+ free_args(args);
+ return NULL;
+}
+
+static char *
+get_bprint_format(void *data, int size __maybe_unused,
+ struct event_format *event)
+{
+ struct pevent *pevent = event->pevent;
+ unsigned long long addr;
+ struct format_field *field;
+ struct printk_map *printk;
+ char *format;
+
+ field = pevent->bprint_fmt_field;
+
+ if (!field) {
+ field = pevent_find_field(event, "fmt");
+ if (!field) {
+ do_warning_event(event, "can't find format field for binary printk");
+ return NULL;
+ }
+ pevent->bprint_fmt_field = field;
+ }
+
+ addr = pevent_read_number(pevent, data + field->offset, field->size);
+
+ printk = find_printk(pevent, addr);
+ if (!printk) {
+ if (asprintf(&format, "%%pf: (NO FORMAT FOUND at %llx)\n", addr) < 0)
+ return NULL;
+ return format;
+ }
+
+ if (asprintf(&format, "%s: %s", "%pf", printk->printk) < 0)
+ return NULL;
+
+ return format;
+}
+
+static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
+ struct event_format *event, struct print_arg *arg)
+{
+ unsigned char *buf;
+ const char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
+
+ if (arg->type == PRINT_FUNC) {
+ process_defined_func(s, data, size, event, arg);
+ return;
+ }
+
+ if (arg->type != PRINT_FIELD) {
+ trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
+ arg->type);
+ return;
+ }
+
+ if (mac == 'm')
+ fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
+ if (!arg->field.field) {
+ arg->field.field =
+ pevent_find_any_field(event, arg->field.name);
+ if (!arg->field.field) {
+ do_warning_event(event, "%s: field %s not found",
+ __func__, arg->field.name);
+ return;
+ }
+ }
+ if (arg->field.field->size != 6) {
+ trace_seq_printf(s, "INVALIDMAC");
+ return;
+ }
+ buf = data + arg->field.field->offset;
+ trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
+}
+
+static int is_printable_array(char *p, unsigned int len)
+{
+ unsigned int i;
+
+ for (i = 0; i < len && p[i]; i++)
+ if (!isprint(p[i]) && !isspace(p[i]))
+ return 0;
+ return 1;
+}
+
+static void print_event_fields(struct trace_seq *s, void *data,
+ int size __maybe_unused,
+ struct event_format *event)
+{
+ struct format_field *field;
+ unsigned long long val;
+ unsigned int offset, len, i;
+
+ field = event->format.fields;
+ while (field) {
+ trace_seq_printf(s, " %s=", field->name);
+ if (field->flags & FIELD_IS_ARRAY) {
+ offset = field->offset;
+ len = field->size;
+ if (field->flags & FIELD_IS_DYNAMIC) {
+ val = pevent_read_number(event->pevent, data + offset, len);
+ offset = val;
+ len = offset >> 16;
+ offset &= 0xffff;
+ }
+ if (field->flags & FIELD_IS_STRING &&
+ is_printable_array(data + offset, len)) {
+ trace_seq_printf(s, "%s", (char *)data + offset);
+ } else {
+ trace_seq_puts(s, "ARRAY[");
+ for (i = 0; i < len; i++) {
+ if (i)
+ trace_seq_puts(s, ", ");
+ trace_seq_printf(s, "%02x",
+ *((unsigned char *)data + offset + i));
+ }
+ trace_seq_putc(s, ']');
+ field->flags &= ~FIELD_IS_STRING;
+ }
+ } else {
+ val = pevent_read_number(event->pevent, data + field->offset,
+ field->size);
+ if (field->flags & FIELD_IS_POINTER) {
+ trace_seq_printf(s, "0x%llx", val);
+ } else if (field->flags & FIELD_IS_SIGNED) {
+ switch (field->size) {
+ case 4:
+ /*
+ * If field is long then print it in hex.
+ * A long usually stores pointers.
+ */
+ if (field->flags & FIELD_IS_LONG)
+ trace_seq_printf(s, "0x%x", (int)val);
+ else
+ trace_seq_printf(s, "%d", (int)val);
+ break;
+ case 2:
+ trace_seq_printf(s, "%2d", (short)val);
+ break;
+ case 1:
+ trace_seq_printf(s, "%1d", (char)val);
+ break;
+ default:
+ trace_seq_printf(s, "%lld", val);
+ }
+ } else {
+ if (field->flags & FIELD_IS_LONG)
+ trace_seq_printf(s, "0x%llx", val);
+ else
+ trace_seq_printf(s, "%llu", val);
+ }
+ }
+ field = field->next;
+ }
+}
+
+static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
+{
+ struct pevent *pevent = event->pevent;
+ struct print_fmt *print_fmt = &event->print_fmt;
+ struct print_arg *arg = print_fmt->args;
+ struct print_arg *args = NULL;
+ const char *ptr = print_fmt->format;
+ unsigned long long val;
+ struct func_map *func;
+ const char *saveptr;
+ struct trace_seq p;
+ char *bprint_fmt = NULL;
+ char format[32];
+ int show_func;
+ int len_as_arg;
+ int len_arg = 0;
+ int len;
+ int ls;
+
+ if (event->flags & EVENT_FL_FAILED) {
+ trace_seq_printf(s, "[FAILED TO PARSE]");
+ print_event_fields(s, data, size, event);
+ return;
+ }
+
+ if (event->flags & EVENT_FL_ISBPRINT) {
+ bprint_fmt = get_bprint_format(data, size, event);
+ args = make_bprint_args(bprint_fmt, data, size, event);
+ arg = args;
+ ptr = bprint_fmt;
+ }
+
+ for (; *ptr; ptr++) {
+ ls = 0;
+ if (*ptr == '\\') {
+ ptr++;
+ switch (*ptr) {
+ case 'n':
+ trace_seq_putc(s, '\n');
+ break;
+ case 't':
+ trace_seq_putc(s, '\t');
+ break;
+ case 'r':
+ trace_seq_putc(s, '\r');
+ break;
+ case '\\':
+ trace_seq_putc(s, '\\');
+ break;
+ default:
+ trace_seq_putc(s, *ptr);
+ break;
+ }
+
+ } else if (*ptr == '%') {
+ saveptr = ptr;
+ show_func = 0;
+ len_as_arg = 0;
+ cont_process:
+ ptr++;
+ switch (*ptr) {
+ case '%':
+ trace_seq_putc(s, '%');
+ break;
+ case '#':
+ /* FIXME: need to handle properly */
+ goto cont_process;
+ case 'h':
+ ls--;
+ goto cont_process;
+ case 'l':
+ ls++;
+ goto cont_process;
+ case 'L':
+ ls = 2;
+ goto cont_process;
+ case '*':
+ /* The argument is the length. */
+ if (!arg) {
+ do_warning_event(event, "no argument match");
+ event->flags |= EVENT_FL_FAILED;
+ goto out_failed;
+ }
+ len_arg = eval_num_arg(data, size, event, arg);
+ len_as_arg = 1;
+ arg = arg->next;
+ goto cont_process;
+ case '.':
+ case 'z':
+ case 'Z':
+ case '0' ... '9':
+ goto cont_process;
+ case 'p':
+ if (pevent->long_size == 4)
+ ls = 1;
+ else
+ ls = 2;
+
+ if (*(ptr+1) == 'F' ||
+ *(ptr+1) == 'f') {
+ ptr++;
+ show_func = *ptr;
+ } else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
+ print_mac_arg(s, *(ptr+1), data, size, event, arg);
+ ptr++;
+ arg = arg->next;
+ break;
+ }
+
+ /* fall through */
+ case 'd':
+ case 'i':
+ case 'x':
+ case 'X':
+ case 'u':
+ if (!arg) {
+ do_warning_event(event, "no argument match");
+ event->flags |= EVENT_FL_FAILED;
+ goto out_failed;
+ }
+
+ len = ((unsigned long)ptr + 1) -
+ (unsigned long)saveptr;
+
+ /* should never happen */
+ if (len > 31) {
+ do_warning_event(event, "bad format!");
+ event->flags |= EVENT_FL_FAILED;
+ len = 31;
+ }
+
+ memcpy(format, saveptr, len);
+ format[len] = 0;
+
+ val = eval_num_arg(data, size, event, arg);
+ arg = arg->next;
+
+ if (show_func) {
+ func = find_func(pevent, val);
+ if (func) {
+ trace_seq_puts(s, func->func);
+ if (show_func == 'F')
+ trace_seq_printf(s,
+ "+0x%llx",
+ val - func->addr);
+ break;
+ }
+ }
+ if (pevent->long_size == 8 && ls &&
+ sizeof(long) != 8) {
+ char *p;
+
+ ls = 2;
+ /* make %l into %ll */
+ p = strchr(format, 'l');
+ if (p)
+ memmove(p+1, p, strlen(p)+1);
+ else if (strcmp(format, "%p") == 0)
+ strcpy(format, "0x%llx");
+ }
+ switch (ls) {
+ case -2:
+ if (len_as_arg)
+ trace_seq_printf(s, format, len_arg, (char)val);
+ else
+ trace_seq_printf(s, format, (char)val);
+ break;
+ case -1:
+ if (len_as_arg)
+ trace_seq_printf(s, format, len_arg, (short)val);
+ else
+ trace_seq_printf(s, format, (short)val);
+ break;
+ case 0:
+ if (len_as_arg)
+ trace_seq_printf(s, format, len_arg, (int)val);
+ else
+ trace_seq_printf(s, format, (int)val);
+ break;
+ case 1:
+ if (len_as_arg)
+ trace_seq_printf(s, format, len_arg, (long)val);
+ else
+ trace_seq_printf(s, format, (long)val);
+ break;
+ case 2:
+ if (len_as_arg)
+ trace_seq_printf(s, format, len_arg,
+ (long long)val);
+ else
+ trace_seq_printf(s, format, (long long)val);
+ break;
+ default:
+ do_warning_event(event, "bad count (%d)", ls);
+ event->flags |= EVENT_FL_FAILED;
+ }
+ break;
+ case 's':
+ if (!arg) {
+ do_warning_event(event, "no matching argument");
+ event->flags |= EVENT_FL_FAILED;
+ goto out_failed;
+ }
+
+ len = ((unsigned long)ptr + 1) -
+ (unsigned long)saveptr;
+
+ /* should never happen */
+ if (len > 31) {
+ do_warning_event(event, "bad format!");
+ event->flags |= EVENT_FL_FAILED;
+ len = 31;
+ }
+
+ memcpy(format, saveptr, len);
+ format[len] = 0;
+ if (!len_as_arg)
+ len_arg = -1;
+ /* Use helper trace_seq */
+ trace_seq_init(&p);
+ print_str_arg(&p, data, size, event,
+ format, len_arg, arg);
+ trace_seq_terminate(&p);
+ trace_seq_puts(s, p.buffer);
+ trace_seq_destroy(&p);
+ arg = arg->next;
+ break;
+ default:
+ trace_seq_printf(s, ">%c<", *ptr);
+
+ }
+ } else
+ trace_seq_putc(s, *ptr);
+ }
+
+ if (event->flags & EVENT_FL_FAILED) {
+out_failed:
+ trace_seq_printf(s, "[FAILED TO PARSE]");
+ }
+
+ if (args) {
+ free_args(args);
+ free(bprint_fmt);
+ }
+}
+
+/**
+ * pevent_data_lat_fmt - parse the data for the latency format
+ * @pevent: a handle to the pevent
+ * @s: the trace_seq to write to
+ * @record: the record to read from
+ *
+ * This parses out the Latency format (interrupts disabled,
+ * need rescheduling, in hard/soft interrupt, preempt count
+ * and lock depth) and places it into the trace_seq.
+ */
+void pevent_data_lat_fmt(struct pevent *pevent,
+ struct trace_seq *s, struct pevent_record *record)
+{
+ static int check_lock_depth = 1;
+ static int check_migrate_disable = 1;
+ static int lock_depth_exists;
+ static int migrate_disable_exists;
+ unsigned int lat_flags;
+ unsigned int pc;
+ int lock_depth = 0;
+ int migrate_disable = 0;
+ int hardirq;
+ int softirq;
+ void *data = record->data;
+
+ lat_flags = parse_common_flags(pevent, data);
+ pc = parse_common_pc(pevent, data);
+ /* lock_depth may not always exist */
+ if (lock_depth_exists)
+ lock_depth = parse_common_lock_depth(pevent, data);
+ else if (check_lock_depth) {
+ lock_depth = parse_common_lock_depth(pevent, data);
+ if (lock_depth < 0)
+ check_lock_depth = 0;
+ else
+ lock_depth_exists = 1;
+ }
+
+ /* migrate_disable may not always exist */
+ if (migrate_disable_exists)
+ migrate_disable = parse_common_migrate_disable(pevent, data);
+ else if (check_migrate_disable) {
+ migrate_disable = parse_common_migrate_disable(pevent, data);
+ if (migrate_disable < 0)
+ check_migrate_disable = 0;
+ else
+ migrate_disable_exists = 1;
+ }
+
+ hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
+ softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
+
+ trace_seq_printf(s, "%c%c%c",
+ (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
+ (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
+ 'X' : '.',
+ (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
+ 'N' : '.',
+ (hardirq && softirq) ? 'H' :
+ hardirq ? 'h' : softirq ? 's' : '.');
+
+ if (pc)
+ trace_seq_printf(s, "%x", pc);
+ else
+ trace_seq_putc(s, '.');
+
+ if (migrate_disable_exists) {
+ if (migrate_disable < 0)
+ trace_seq_putc(s, '.');
+ else
+ trace_seq_printf(s, "%d", migrate_disable);
+ }
+
+ if (lock_depth_exists) {
+ if (lock_depth < 0)
+ trace_seq_putc(s, '.');
+ else
+ trace_seq_printf(s, "%d", lock_depth);
+ }
+
+ trace_seq_terminate(s);
+}
+
+/**
+ * pevent_data_type - parse out the given event type
+ * @pevent: a handle to the pevent
+ * @rec: the record to read from
+ *
+ * This returns the event id from the @rec.
+ */
+int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
+{
+ return trace_parse_common_type(pevent, rec->data);
+}
+
+/**
+ * pevent_data_event_from_type - find the event by a given type
+ * @pevent: a handle to the pevent
+ * @type: the type of the event.
+ *
+ * This returns the event form a given @type;
+ */
+struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
+{
+ return pevent_find_event(pevent, type);
+}
+
+/**
+ * pevent_data_pid - parse the PID from raw data
+ * @pevent: a handle to the pevent
+ * @rec: the record to parse
+ *
+ * This returns the PID from a raw data.
+ */
+int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
+{
+ return parse_common_pid(pevent, rec->data);
+}
+
+/**
+ * pevent_data_comm_from_pid - return the command line from PID
+ * @pevent: a handle to the pevent
+ * @pid: the PID of the task to search for
+ *
+ * This returns a pointer to the command line that has the given
+ * @pid.
+ */
+const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
+{
+ const char *comm;
+
+ comm = find_cmdline(pevent, pid);
+ return comm;
+}
+
+/**
+ * pevent_data_comm_from_pid - parse the data into the print format
+ * @s: the trace_seq to write to
+ * @event: the handle to the event
+ * @record: the record to read from
+ *
+ * This parses the raw @data using the given @event information and
+ * writes the print format into the trace_seq.
+ */
+void pevent_event_info(struct trace_seq *s, struct event_format *event,
+ struct pevent_record *record)
+{
+ int print_pretty = 1;
+
+ if (event->pevent->print_raw || (event->flags & EVENT_FL_PRINTRAW))
+ print_event_fields(s, record->data, record->size, event);
+ else {
+
+ if (event->handler && !(event->flags & EVENT_FL_NOHANDLE))
+ print_pretty = event->handler(s, record, event,
+ event->context);
+
+ if (print_pretty)
+ pretty_print(s, record->data, record->size, event);
+ }
+
+ trace_seq_terminate(s);
+}
+
+static bool is_timestamp_in_us(char *trace_clock, bool use_trace_clock)
+{
+ if (!use_trace_clock)
+ return true;
+
+ if (!strcmp(trace_clock, "local") || !strcmp(trace_clock, "global")
+ || !strcmp(trace_clock, "uptime") || !strcmp(trace_clock, "perf"))
+ return true;
+
+ /* trace_clock is setting in tsc or counter mode */
+ return false;
+}
+
+void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
+ struct pevent_record *record, bool use_trace_clock)
+{
+ static const char *spaces = " "; /* 20 spaces */
+ struct event_format *event;
+ unsigned long secs;
+ unsigned long usecs;
+ unsigned long nsecs;
+ const char *comm;
+ void *data = record->data;
+ int type;
+ int pid;
+ int len;
+ int p;
+ bool use_usec_format;
+
+ use_usec_format = is_timestamp_in_us(pevent->trace_clock,
+ use_trace_clock);
+ if (use_usec_format) {
+ secs = record->ts / NSECS_PER_SEC;
+ nsecs = record->ts - secs * NSECS_PER_SEC;
+ }
+
+ if (record->size < 0) {
+ do_warning("ug! negative record size %d", record->size);
+ return;
+ }
+
+ type = trace_parse_common_type(pevent, data);
+
+ event = pevent_find_event(pevent, type);
+ if (!event) {
+ do_warning("ug! no event found for type %d", type);
+ return;
+ }
+
+ pid = parse_common_pid(pevent, data);
+ comm = find_cmdline(pevent, pid);
+
+ if (pevent->latency_format) {
+ trace_seq_printf(s, "%8.8s-%-5d %3d",
+ comm, pid, record->cpu);
+ pevent_data_lat_fmt(pevent, s, record);
+ } else
+ trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
+
+ if (use_usec_format) {
+ if (pevent->flags & PEVENT_NSEC_OUTPUT) {
+ usecs = nsecs;
+ p = 9;
+ } else {
+ usecs = (nsecs + 500) / NSECS_PER_USEC;
+ p = 6;
+ }
+
+ trace_seq_printf(s, " %5lu.%0*lu: %s: ",
+ secs, p, usecs, event->name);
+ } else
+ trace_seq_printf(s, " %12llu: %s: ",
+ record->ts, event->name);
+
+ /* Space out the event names evenly. */
+ len = strlen(event->name);
+ if (len < 20)
+ trace_seq_printf(s, "%.*s", 20 - len, spaces);
+
+ pevent_event_info(s, event, record);
+}
+
+static int events_id_cmp(const void *a, const void *b)
+{
+ struct event_format * const * ea = a;
+ struct event_format * const * eb = b;
+
+ if ((*ea)->id < (*eb)->id)
+ return -1;
+
+ if ((*ea)->id > (*eb)->id)
+ return 1;
+
+ return 0;
+}
+
+static int events_name_cmp(const void *a, const void *b)
+{
+ struct event_format * const * ea = a;
+ struct event_format * const * eb = b;
+ int res;
+
+ res = strcmp((*ea)->name, (*eb)->name);
+ if (res)
+ return res;
+
+ res = strcmp((*ea)->system, (*eb)->system);
+ if (res)
+ return res;
+
+ return events_id_cmp(a, b);
+}
+
+static int events_system_cmp(const void *a, const void *b)
+{
+ struct event_format * const * ea = a;
+ struct event_format * const * eb = b;
+ int res;
+
+ res = strcmp((*ea)->system, (*eb)->system);
+ if (res)
+ return res;
+
+ res = strcmp((*ea)->name, (*eb)->name);
+ if (res)
+ return res;
+
+ return events_id_cmp(a, b);
+}
+
+struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
+{
+ struct event_format **events;
+ int (*sort)(const void *a, const void *b);
+
+ events = pevent->sort_events;
+
+ if (events && pevent->last_type == sort_type)
+ return events;
+
+ if (!events) {
+ events = malloc(sizeof(*events) * (pevent->nr_events + 1));
+ if (!events)
+ return NULL;
+
+ memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
+ events[pevent->nr_events] = NULL;
+
+ pevent->sort_events = events;
+
+ /* the internal events are sorted by id */
+ if (sort_type == EVENT_SORT_ID) {
+ pevent->last_type = sort_type;
+ return events;
+ }
+ }
+
+ switch (sort_type) {
+ case EVENT_SORT_ID:
+ sort = events_id_cmp;
+ break;
+ case EVENT_SORT_NAME:
+ sort = events_name_cmp;
+ break;
+ case EVENT_SORT_SYSTEM:
+ sort = events_system_cmp;
+ break;
+ default:
+ return events;
+ }
+
+ qsort(events, pevent->nr_events, sizeof(*events), sort);
+ pevent->last_type = sort_type;
+
+ return events;
+}
+
+static struct format_field **
+get_event_fields(const char *type, const char *name,
+ int count, struct format_field *list)
+{
+ struct format_field **fields;
+ struct format_field *field;
+ int i = 0;
+
+ fields = malloc(sizeof(*fields) * (count + 1));
+ if (!fields)
+ return NULL;
+
+ for (field = list; field; field = field->next) {
+ fields[i++] = field;
+ if (i == count + 1) {
+ do_warning("event %s has more %s fields than specified",
+ name, type);
+ i--;
+ break;
+ }
+ }
+
+ if (i != count)
+ do_warning("event %s has less %s fields than specified",
+ name, type);
+
+ fields[i] = NULL;
+
+ return fields;
+}
+
+/**
+ * pevent_event_common_fields - return a list of common fields for an event
+ * @event: the event to return the common fields of.
+ *
+ * Returns an allocated array of fields. The last item in the array is NULL.
+ * The array must be freed with free().
+ */
+struct format_field **pevent_event_common_fields(struct event_format *event)
+{
+ return get_event_fields("common", event->name,
+ event->format.nr_common,
+ event->format.common_fields);
+}
+
+/**
+ * pevent_event_fields - return a list of event specific fields for an event
+ * @event: the event to return the fields of.
+ *
+ * Returns an allocated array of fields. The last item in the array is NULL.
+ * The array must be freed with free().
+ */
+struct format_field **pevent_event_fields(struct event_format *event)
+{
+ return get_event_fields("event", event->name,
+ event->format.nr_fields,
+ event->format.fields);
+}
+
+static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
+{
+ trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
+ if (field->next) {
+ trace_seq_puts(s, ", ");
+ print_fields(s, field->next);
+ }
+}
+
+/* for debugging */
+static void print_args(struct print_arg *args)
+{
+ int print_paren = 1;
+ struct trace_seq s;
+
+ switch (args->type) {
+ case PRINT_NULL:
+ printf("null");
+ break;
+ case PRINT_ATOM:
+ printf("%s", args->atom.atom);
+ break;
+ case PRINT_FIELD:
+ printf("REC->%s", args->field.name);
+ break;
+ case PRINT_FLAGS:
+ printf("__print_flags(");
+ print_args(args->flags.field);
+ printf(", %s, ", args->flags.delim);
+ trace_seq_init(&s);
+ print_fields(&s, args->flags.flags);
+ trace_seq_do_printf(&s);
+ trace_seq_destroy(&s);
+ printf(")");
+ break;
+ case PRINT_SYMBOL:
+ printf("__print_symbolic(");
+ print_args(args->symbol.field);
+ printf(", ");
+ trace_seq_init(&s);
+ print_fields(&s, args->symbol.symbols);
+ trace_seq_do_printf(&s);
+ trace_seq_destroy(&s);
+ printf(")");
+ break;
+ case PRINT_HEX:
+ printf("__print_hex(");
+ print_args(args->hex.field);
+ printf(", ");
+ print_args(args->hex.size);
+ printf(")");
+ break;
+ case PRINT_STRING:
+ case PRINT_BSTRING:
+ printf("__get_str(%s)", args->string.string);
+ break;
+ case PRINT_BITMASK:
+ printf("__get_bitmask(%s)", args->bitmask.bitmask);
+ break;
+ case PRINT_TYPE:
+ printf("(%s)", args->typecast.type);
+ print_args(args->typecast.item);
+ break;
+ case PRINT_OP:
+ if (strcmp(args->op.op, ":") == 0)
+ print_paren = 0;
+ if (print_paren)
+ printf("(");
+ print_args(args->op.left);
+ printf(" %s ", args->op.op);
+ print_args(args->op.right);
+ if (print_paren)
+ printf(")");
+ break;
+ default:
+ /* we should warn... */
+ return;
+ }
+ if (args->next) {
+ printf("\n");
+ print_args(args->next);
+ }
+}
+
+static void parse_header_field(const char *field,
+ int *offset, int *size, int mandatory)
+{
+ unsigned long long save_input_buf_ptr;
+ unsigned long long save_input_buf_siz;
+ char *token;
+ int type;
+
+ save_input_buf_ptr = input_buf_ptr;
+ save_input_buf_siz = input_buf_siz;
+
+ if (read_expected(EVENT_ITEM, "field") < 0)
+ return;
+ if (read_expected(EVENT_OP, ":") < 0)
+ return;
+
+ /* type */
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto fail;
+ free_token(token);
+
+ /*
+ * If this is not a mandatory field, then test it first.
+ */
+ if (mandatory) {
+ if (read_expected(EVENT_ITEM, field) < 0)
+ return;
+ } else {
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto fail;
+ if (strcmp(token, field) != 0)
+ goto discard;
+ free_token(token);
+ }
+
+ if (read_expected(EVENT_OP, ";") < 0)
+ return;
+ if (read_expected(EVENT_ITEM, "offset") < 0)
+ return;
+ if (read_expected(EVENT_OP, ":") < 0)
+ return;
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto fail;
+ *offset = atoi(token);
+ free_token(token);
+ if (read_expected(EVENT_OP, ";") < 0)
+ return;
+ if (read_expected(EVENT_ITEM, "size") < 0)
+ return;
+ if (read_expected(EVENT_OP, ":") < 0)
+ return;
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto fail;
+ *size = atoi(token);
+ free_token(token);
+ if (read_expected(EVENT_OP, ";") < 0)
+ return;
+ type = read_token(&token);
+ if (type != EVENT_NEWLINE) {
+ /* newer versions of the kernel have a "signed" type */
+ if (type != EVENT_ITEM)
+ goto fail;
+
+ if (strcmp(token, "signed") != 0)
+ goto fail;
+
+ free_token(token);
+
+ if (read_expected(EVENT_OP, ":") < 0)
+ return;
+
+ if (read_expect_type(EVENT_ITEM, &token))
+ goto fail;
+
+ free_token(token);
+ if (read_expected(EVENT_OP, ";") < 0)
+ return;
+
+ if (read_expect_type(EVENT_NEWLINE, &token))
+ goto fail;
+ }
+ fail:
+ free_token(token);
+ return;
+
+ discard:
+ input_buf_ptr = save_input_buf_ptr;
+ input_buf_siz = save_input_buf_siz;
+ *offset = 0;
+ *size = 0;
+ free_token(token);
+}
+
+/**
+ * pevent_parse_header_page - parse the data stored in the header page
+ * @pevent: the handle to the pevent
+ * @buf: the buffer storing the header page format string
+ * @size: the size of @buf
+ * @long_size: the long size to use if there is no header
+ *
+ * This parses the header page format for information on the
+ * ring buffer used. The @buf should be copied from
+ *
+ * /sys/kernel/debug/tracing/events/header_page
+ */
+int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
+ int long_size)
+{
+ int ignore;
+
+ if (!size) {
+ /*
+ * Old kernels did not have header page info.
+ * Sorry but we just use what we find here in user space.
+ */
+ pevent->header_page_ts_size = sizeof(long long);
+ pevent->header_page_size_size = long_size;
+ pevent->header_page_data_offset = sizeof(long long) + long_size;
+ pevent->old_format = 1;
+ return -1;
+ }
+ init_input_buf(buf, size);
+
+ parse_header_field("timestamp", &pevent->header_page_ts_offset,
+ &pevent->header_page_ts_size, 1);
+ parse_header_field("commit", &pevent->header_page_size_offset,
+ &pevent->header_page_size_size, 1);
+ parse_header_field("overwrite", &pevent->header_page_overwrite,
+ &ignore, 0);
+ parse_header_field("data", &pevent->header_page_data_offset,
+ &pevent->header_page_data_size, 1);
+
+ return 0;
+}
+
+static int event_matches(struct event_format *event,
+ int id, const char *sys_name,
+ const char *event_name)
+{
+ if (id >= 0 && id != event->id)
+ return 0;
+
+ if (event_name && (strcmp(event_name, event->name) != 0))
+ return 0;
+
+ if (sys_name && (strcmp(sys_name, event->system) != 0))
+ return 0;
+
+ return 1;
+}
+
+static void free_handler(struct event_handler *handle)
+{
+ free((void *)handle->sys_name);
+ free((void *)handle->event_name);
+ free(handle);
+}
+
+static int find_event_handle(struct pevent *pevent, struct event_format *event)
+{
+ struct event_handler *handle, **next;
+
+ for (next = &pevent->handlers; *next;
+ next = &(*next)->next) {
+ handle = *next;
+ if (event_matches(event, handle->id,
+ handle->sys_name,
+ handle->event_name))
+ break;
+ }
+
+ if (!(*next))
+ return 0;
+
+ pr_stat("overriding event (%d) %s:%s with new print handler",
+ event->id, event->system, event->name);
+
+ event->handler = handle->func;
+ event->context = handle->context;
+
+ *next = handle->next;
+ free_handler(handle);
+
+ return 1;
+}
+
+/**
+ * __pevent_parse_format - parse the event format
+ * @buf: the buffer storing the event format string
+ * @size: the size of @buf
+ * @sys: the system the event belongs to
+ *
+ * This parses the event format and creates an event structure
+ * to quickly parse raw data for a given event.
+ *
+ * These files currently come from:
+ *
+ * /sys/kernel/debug/tracing/events/.../.../format
+ */
+enum pevent_errno __pevent_parse_format(struct event_format **eventp,
+ struct pevent *pevent, const char *buf,
+ unsigned long size, const char *sys)
+{
+ struct event_format *event;
+ int ret;
+
+ init_input_buf(buf, size);
+
+ *eventp = event = alloc_event();
+ if (!event)
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+
+ event->name = event_read_name();
+ if (!event->name) {
+ /* Bad event? */
+ ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
+ goto event_alloc_failed;
+ }
+
+ if (strcmp(sys, "ftrace") == 0) {
+ event->flags |= EVENT_FL_ISFTRACE;
+
+ if (strcmp(event->name, "bprint") == 0)
+ event->flags |= EVENT_FL_ISBPRINT;
+ }
+
+ event->id = event_read_id();
+ if (event->id < 0) {
+ ret = PEVENT_ERRNO__READ_ID_FAILED;
+ /*
+ * This isn't an allocation error actually.
+ * But as the ID is critical, just bail out.
+ */
+ goto event_alloc_failed;
+ }
+
+ event->system = strdup(sys);
+ if (!event->system) {
+ ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
+ goto event_alloc_failed;
+ }
+
+ /* Add pevent to event so that it can be referenced */
+ event->pevent = pevent;
+
+ ret = event_read_format(event);
+ if (ret < 0) {
+ ret = PEVENT_ERRNO__READ_FORMAT_FAILED;
+ goto event_parse_failed;
+ }
+
+ /*
+ * If the event has an override, don't print warnings if the event
+ * print format fails to parse.
+ */
+ if (pevent && find_event_handle(pevent, event))
+ show_warning = 0;
+
+ ret = event_read_print(event);
+ show_warning = 1;
+
+ if (ret < 0) {
+ ret = PEVENT_ERRNO__READ_PRINT_FAILED;
+ goto event_parse_failed;
+ }
+
+ if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
+ struct format_field *field;
+ struct print_arg *arg, **list;
+
+ /* old ftrace had no args */
+ list = &event->print_fmt.args;
+ for (field = event->format.fields; field; field = field->next) {
+ arg = alloc_arg();
+ if (!arg) {
+ event->flags |= EVENT_FL_FAILED;
+ return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
+ }
+ arg->type = PRINT_FIELD;
+ arg->field.name = strdup(field->name);
+ if (!arg->field.name) {
+ event->flags |= EVENT_FL_FAILED;
+ free_arg(arg);
+ return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
+ }
+ arg->field.field = field;
+ *list = arg;
+ list = &arg->next;
+ }
+ return 0;
+ }
+
+ return 0;
+
+ event_parse_failed:
+ event->flags |= EVENT_FL_FAILED;
+ return ret;
+
+ event_alloc_failed:
+ free(event->system);
+ free(event->name);
+ free(event);
+ *eventp = NULL;
+ return ret;
+}
+
+static enum pevent_errno
+__pevent_parse_event(struct pevent *pevent,
+ struct event_format **eventp,
+ const char *buf, unsigned long size,
+ const char *sys)
+{
+ int ret = __pevent_parse_format(eventp, pevent, buf, size, sys);
+ struct event_format *event = *eventp;
+
+ if (event == NULL)
+ return ret;
+
+ if (pevent && add_event(pevent, event)) {
+ ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
+ goto event_add_failed;
+ }
+
+#define PRINT_ARGS 0
+ if (PRINT_ARGS && event->print_fmt.args)
+ print_args(event->print_fmt.args);
+
+ return 0;
+
+event_add_failed:
+ pevent_free_format(event);
+ return ret;
+}
+
+/**
+ * pevent_parse_format - parse the event format
+ * @pevent: the handle to the pevent
+ * @eventp: returned format
+ * @buf: the buffer storing the event format string
+ * @size: the size of @buf
+ * @sys: the system the event belongs to
+ *
+ * This parses the event format and creates an event structure
+ * to quickly parse raw data for a given event.
+ *
+ * These files currently come from:
+ *
+ * /sys/kernel/debug/tracing/events/.../.../format
+ */
+enum pevent_errno pevent_parse_format(struct pevent *pevent,
+ struct event_format **eventp,
+ const char *buf,
+ unsigned long size, const char *sys)
+{
+ return __pevent_parse_event(pevent, eventp, buf, size, sys);
+}
+
+/**
+ * pevent_parse_event - parse the event format
+ * @pevent: the handle to the pevent
+ * @buf: the buffer storing the event format string
+ * @size: the size of @buf
+ * @sys: the system the event belongs to
+ *
+ * This parses the event format and creates an event structure
+ * to quickly parse raw data for a given event.
+ *
+ * These files currently come from:
+ *
+ * /sys/kernel/debug/tracing/events/.../.../format
+ */
+enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
+ unsigned long size, const char *sys)
+{
+ struct event_format *event = NULL;
+ return __pevent_parse_event(pevent, &event, buf, size, sys);
+}
+
+#undef _PE
+#define _PE(code, str) str
+static const char * const pevent_error_str[] = {
+ PEVENT_ERRORS
+};
+#undef _PE
+
+int pevent_strerror(struct pevent *pevent __maybe_unused,
+ enum pevent_errno errnum, char *buf, size_t buflen)
+{
+ int idx;
+ const char *msg;
+
+ if (errnum >= 0) {
+ msg = strerror_r(errnum, buf, buflen);
+ if (msg != buf) {
+ size_t len = strlen(msg);
+ memcpy(buf, msg, min(buflen - 1, len));
+ *(buf + min(buflen - 1, len)) = '\0';
+ }
+ return 0;
+ }
+
+ if (errnum <= __PEVENT_ERRNO__START ||
+ errnum >= __PEVENT_ERRNO__END)
+ return -1;
+
+ idx = errnum - __PEVENT_ERRNO__START - 1;
+ msg = pevent_error_str[idx];
+ snprintf(buf, buflen, "%s", msg);
+
+ return 0;
+}
+
+int get_field_val(struct trace_seq *s, struct format_field *field,
+ const char *name, struct pevent_record *record,
+ unsigned long long *val, int err)
+{
+ if (!field) {
+ if (err)
+ trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
+ return -1;
+ }
+
+ if (pevent_read_number_field(field, record->data, val)) {
+ if (err)
+ trace_seq_printf(s, " %s=INVALID", name);
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * pevent_get_field_raw - return the raw pointer into the data field
+ * @s: The seq to print to on error
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @len: place to store the field length.
+ * @err: print default error if failed.
+ *
+ * Returns a pointer into record->data of the field and places
+ * the length of the field in @len.
+ *
+ * On failure, it returns NULL.
+ */
+void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
+ const char *name, struct pevent_record *record,
+ int *len, int err)
+{
+ struct format_field *field;
+ void *data = record->data;
+ unsigned offset;
+ int dummy;
+
+ if (!event)
+ return NULL;
+
+ field = pevent_find_field(event, name);
+
+ if (!field) {
+ if (err)
+ trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
+ return NULL;
+ }
+
+ /* Allow @len to be NULL */
+ if (!len)
+ len = &dummy;
+
+ offset = field->offset;
+ if (field->flags & FIELD_IS_DYNAMIC) {
+ offset = pevent_read_number(event->pevent,
+ data + offset, field->size);
+ *len = offset >> 16;
+ offset &= 0xffff;
+ } else
+ *len = field->size;
+
+ return data + offset;
+}
+
+/**
+ * pevent_get_field_val - find a field and return its value
+ * @s: The seq to print to on error
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @val: place to store the value of the field.
+ * @err: print default error if failed.
+ *
+ * Returns 0 on success -1 on field not found.
+ */
+int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
+ const char *name, struct pevent_record *record,
+ unsigned long long *val, int err)
+{
+ struct format_field *field;
+
+ if (!event)
+ return -1;
+
+ field = pevent_find_field(event, name);
+
+ return get_field_val(s, field, name, record, val, err);
+}
+
+/**
+ * pevent_get_common_field_val - find a common field and return its value
+ * @s: The seq to print to on error
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @val: place to store the value of the field.
+ * @err: print default error if failed.
+ *
+ * Returns 0 on success -1 on field not found.
+ */
+int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
+ const char *name, struct pevent_record *record,
+ unsigned long long *val, int err)
+{
+ struct format_field *field;
+
+ if (!event)
+ return -1;
+
+ field = pevent_find_common_field(event, name);
+
+ return get_field_val(s, field, name, record, val, err);
+}
+
+/**
+ * pevent_get_any_field_val - find a any field and return its value
+ * @s: The seq to print to on error
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @val: place to store the value of the field.
+ * @err: print default error if failed.
+ *
+ * Returns 0 on success -1 on field not found.
+ */
+int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
+ const char *name, struct pevent_record *record,
+ unsigned long long *val, int err)
+{
+ struct format_field *field;
+
+ if (!event)
+ return -1;
+
+ field = pevent_find_any_field(event, name);
+
+ return get_field_val(s, field, name, record, val, err);
+}
+
+/**
+ * pevent_print_num_field - print a field and a format
+ * @s: The seq to print to
+ * @fmt: The printf format to print the field with.
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @err: print default error if failed.
+ *
+ * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
+ */
+int pevent_print_num_field(struct trace_seq *s, const char *fmt,
+ struct event_format *event, const char *name,
+ struct pevent_record *record, int err)
+{
+ struct format_field *field = pevent_find_field(event, name);
+ unsigned long long val;
+
+ if (!field)
+ goto failed;
+
+ if (pevent_read_number_field(field, record->data, &val))
+ goto failed;
+
+ return trace_seq_printf(s, fmt, val);
+
+ failed:
+ if (err)
+ trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
+ return -1;
+}
+
+/**
+ * pevent_print_func_field - print a field and a format for function pointers
+ * @s: The seq to print to
+ * @fmt: The printf format to print the field with.
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @err: print default error if failed.
+ *
+ * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
+ */
+int pevent_print_func_field(struct trace_seq *s, const char *fmt,
+ struct event_format *event, const char *name,
+ struct pevent_record *record, int err)
+{
+ struct format_field *field = pevent_find_field(event, name);
+ struct pevent *pevent = event->pevent;
+ unsigned long long val;
+ struct func_map *func;
+ char tmp[128];
+
+ if (!field)
+ goto failed;
+
+ if (pevent_read_number_field(field, record->data, &val))
+ goto failed;
+
+ func = find_func(pevent, val);
+
+ if (func)
+ snprintf(tmp, 128, "%s/0x%llx", func->func, func->addr - val);
+ else
+ sprintf(tmp, "0x%08llx", val);
+
+ return trace_seq_printf(s, fmt, tmp);
+
+ failed:
+ if (err)
+ trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
+ return -1;
+}
+
+static void free_func_handle(struct pevent_function_handler *func)
+{
+ struct pevent_func_params *params;
+
+ free(func->name);
+
+ while (func->params) {
+ params = func->params;
+ func->params = params->next;
+ free(params);
+ }
+
+ free(func);
+}
+
+/**
+ * pevent_register_print_function - register a helper function
+ * @pevent: the handle to the pevent
+ * @func: the function to process the helper function
+ * @ret_type: the return type of the helper function
+ * @name: the name of the helper function
+ * @parameters: A list of enum pevent_func_arg_type
+ *
+ * Some events may have helper functions in the print format arguments.
+ * This allows a plugin to dynamically create a way to process one
+ * of these functions.
+ *
+ * The @parameters is a variable list of pevent_func_arg_type enums that
+ * must end with PEVENT_FUNC_ARG_VOID.
+ */
+int pevent_register_print_function(struct pevent *pevent,
+ pevent_func_handler func,
+ enum pevent_func_arg_type ret_type,
+ char *name, ...)
+{
+ struct pevent_function_handler *func_handle;
+ struct pevent_func_params **next_param;
+ struct pevent_func_params *param;
+ enum pevent_func_arg_type type;
+ va_list ap;
+ int ret;
+
+ func_handle = find_func_handler(pevent, name);
+ if (func_handle) {
+ /*
+ * This is most like caused by the users own
+ * plugins updating the function. This overrides the
+ * system defaults.
+ */
+ pr_stat("override of function helper '%s'", name);
+ remove_func_handler(pevent, name);
+ }
+
+ func_handle = calloc(1, sizeof(*func_handle));
+ if (!func_handle) {
+ do_warning("Failed to allocate function handler");
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ func_handle->ret_type = ret_type;
+ func_handle->name = strdup(name);
+ func_handle->func = func;
+ if (!func_handle->name) {
+ do_warning("Failed to allocate function name");
+ free(func_handle);
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ next_param = &(func_handle->params);
+ va_start(ap, name);
+ for (;;) {
+ type = va_arg(ap, enum pevent_func_arg_type);
+ if (type == PEVENT_FUNC_ARG_VOID)
+ break;
+
+ if (type >= PEVENT_FUNC_ARG_MAX_TYPES) {
+ do_warning("Invalid argument type %d", type);
+ ret = PEVENT_ERRNO__INVALID_ARG_TYPE;
+ goto out_free;
+ }
+
+ param = malloc(sizeof(*param));
+ if (!param) {
+ do_warning("Failed to allocate function param");
+ ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
+ goto out_free;
+ }
+ param->type = type;
+ param->next = NULL;
+
+ *next_param = param;
+ next_param = &(param->next);
+
+ func_handle->nr_args++;
+ }
+ va_end(ap);
+
+ func_handle->next = pevent->func_handlers;
+ pevent->func_handlers = func_handle;
+
+ return 0;
+ out_free:
+ va_end(ap);
+ free_func_handle(func_handle);
+ return ret;
+}
+
+/**
+ * pevent_unregister_print_function - unregister a helper function
+ * @pevent: the handle to the pevent
+ * @func: the function to process the helper function
+ * @name: the name of the helper function
+ *
+ * This function removes existing print handler for function @name.
+ *
+ * Returns 0 if the handler was removed successully, -1 otherwise.
+ */
+int pevent_unregister_print_function(struct pevent *pevent,
+ pevent_func_handler func, char *name)
+{
+ struct pevent_function_handler *func_handle;
+
+ func_handle = find_func_handler(pevent, name);
+ if (func_handle && func_handle->func == func) {
+ remove_func_handler(pevent, name);
+ return 0;
+ }
+ return -1;
+}
+
+static struct event_format *pevent_search_event(struct pevent *pevent, int id,
+ const char *sys_name,
+ const char *event_name)
+{
+ struct event_format *event;
+
+ if (id >= 0) {
+ /* search by id */
+ event = pevent_find_event(pevent, id);
+ if (!event)
+ return NULL;
+ if (event_name && (strcmp(event_name, event->name) != 0))
+ return NULL;
+ if (sys_name && (strcmp(sys_name, event->system) != 0))
+ return NULL;
+ } else {
+ event = pevent_find_event_by_name(pevent, sys_name, event_name);
+ if (!event)
+ return NULL;
+ }
+ return event;
+}
+
+/**
+ * pevent_register_event_handler - register a way to parse an event
+ * @pevent: the handle to the pevent
+ * @id: the id of the event to register
+ * @sys_name: the system name the event belongs to
+ * @event_name: the name of the event
+ * @func: the function to call to parse the event information
+ * @context: the data to be passed to @func
+ *
+ * This function allows a developer to override the parsing of
+ * a given event. If for some reason the default print format
+ * is not sufficient, this function will register a function
+ * for an event to be used to parse the data instead.
+ *
+ * If @id is >= 0, then it is used to find the event.
+ * else @sys_name and @event_name are used.
+ */
+int pevent_register_event_handler(struct pevent *pevent, int id,
+ const char *sys_name, const char *event_name,
+ pevent_event_handler_func func, void *context)
+{
+ struct event_format *event;
+ struct event_handler *handle;
+
+ event = pevent_search_event(pevent, id, sys_name, event_name);
+ if (event == NULL)
+ goto not_found;
+
+ pr_stat("overriding event (%d) %s:%s with new print handler",
+ event->id, event->system, event->name);
+
+ event->handler = func;
+ event->context = context;
+ return 0;
+
+ not_found:
+ /* Save for later use. */
+ handle = calloc(1, sizeof(*handle));
+ if (!handle) {
+ do_warning("Failed to allocate event handler");
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ handle->id = id;
+ if (event_name)
+ handle->event_name = strdup(event_name);
+ if (sys_name)
+ handle->sys_name = strdup(sys_name);
+
+ if ((event_name && !handle->event_name) ||
+ (sys_name && !handle->sys_name)) {
+ do_warning("Failed to allocate event/sys name");
+ free((void *)handle->event_name);
+ free((void *)handle->sys_name);
+ free(handle);
+ return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+ }
+
+ handle->func = func;
+ handle->next = pevent->handlers;
+ pevent->handlers = handle;
+ handle->context = context;
+
+ return -1;
+}
+
+static int handle_matches(struct event_handler *handler, int id,
+ const char *sys_name, const char *event_name,
+ pevent_event_handler_func func, void *context)
+{
+ if (id >= 0 && id != handler->id)
+ return 0;
+
+ if (event_name && (strcmp(event_name, handler->event_name) != 0))
+ return 0;
+
+ if (sys_name && (strcmp(sys_name, handler->sys_name) != 0))
+ return 0;
+
+ if (func != handler->func || context != handler->context)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * pevent_unregister_event_handler - unregister an existing event handler
+ * @pevent: the handle to the pevent
+ * @id: the id of the event to unregister
+ * @sys_name: the system name the handler belongs to
+ * @event_name: the name of the event handler
+ * @func: the function to call to parse the event information
+ * @context: the data to be passed to @func
+ *
+ * This function removes existing event handler (parser).
+ *
+ * If @id is >= 0, then it is used to find the event.
+ * else @sys_name and @event_name are used.
+ *
+ * Returns 0 if handler was removed successfully, -1 if event was not found.
+ */
+int pevent_unregister_event_handler(struct pevent *pevent, int id,
+ const char *sys_name, const char *event_name,
+ pevent_event_handler_func func, void *context)
+{
+ struct event_format *event;
+ struct event_handler *handle;
+ struct event_handler **next;
+
+ event = pevent_search_event(pevent, id, sys_name, event_name);
+ if (event == NULL)
+ goto not_found;
+
+ if (event->handler == func && event->context == context) {
+ pr_stat("removing override handler for event (%d) %s:%s. Going back to default handler.",
+ event->id, event->system, event->name);
+
+ event->handler = NULL;
+ event->context = NULL;
+ return 0;
+ }
+
+not_found:
+ for (next = &pevent->handlers; *next; next = &(*next)->next) {
+ handle = *next;
+ if (handle_matches(handle, id, sys_name, event_name,
+ func, context))
+ break;
+ }
+
+ if (!(*next))
+ return -1;
+
+ *next = handle->next;
+ free_handler(handle);
+
+ return 0;
+}
+
+/**
+ * pevent_alloc - create a pevent handle
+ */
+struct pevent *pevent_alloc(void)
+{
+ struct pevent *pevent = calloc(1, sizeof(*pevent));
+
+ if (pevent)
+ pevent->ref_count = 1;
+
+ return pevent;
+}
+
+void pevent_ref(struct pevent *pevent)
+{
+ pevent->ref_count++;
+}
+
+static void free_format_fields(struct format_field *field)
+{
+ struct format_field *next;
+
+ while (field) {
+ next = field->next;
+ free(field->type);
+ free(field->name);
+ free(field);
+ field = next;
+ }
+}
+
+static void free_formats(struct format *format)
+{
+ free_format_fields(format->common_fields);
+ free_format_fields(format->fields);
+}
+
+void pevent_free_format(struct event_format *event)
+{
+ free(event->name);
+ free(event->system);
+
+ free_formats(&event->format);
+
+ free(event->print_fmt.format);
+ free_args(event->print_fmt.args);
+
+ free(event);
+}
+
+/**
+ * pevent_free - free a pevent handle
+ * @pevent: the pevent handle to free
+ */
+void pevent_free(struct pevent *pevent)
+{
+ struct cmdline_list *cmdlist, *cmdnext;
+ struct func_list *funclist, *funcnext;
+ struct printk_list *printklist, *printknext;
+ struct pevent_function_handler *func_handler;
+ struct event_handler *handle;
+ int i;
+
+ if (!pevent)
+ return;
+
+ cmdlist = pevent->cmdlist;
+ funclist = pevent->funclist;
+ printklist = pevent->printklist;
+
+ pevent->ref_count--;
+ if (pevent->ref_count)
+ return;
+
+ if (pevent->cmdlines) {
+ for (i = 0; i < pevent->cmdline_count; i++)
+ free(pevent->cmdlines[i].comm);
+ free(pevent->cmdlines);
+ }
+
+ while (cmdlist) {
+ cmdnext = cmdlist->next;
+ free(cmdlist->comm);
+ free(cmdlist);
+ cmdlist = cmdnext;
+ }
+
+ if (pevent->func_map) {
+ for (i = 0; i < (int)pevent->func_count; i++) {
+ free(pevent->func_map[i].func);
+ free(pevent->func_map[i].mod);
+ }
+ free(pevent->func_map);
+ }
+
+ while (funclist) {
+ funcnext = funclist->next;
+ free(funclist->func);
+ free(funclist->mod);
+ free(funclist);
+ funclist = funcnext;
+ }
+
+ while (pevent->func_handlers) {
+ func_handler = pevent->func_handlers;
+ pevent->func_handlers = func_handler->next;
+ free_func_handle(func_handler);
+ }
+
+ if (pevent->printk_map) {
+ for (i = 0; i < (int)pevent->printk_count; i++)
+ free(pevent->printk_map[i].printk);
+ free(pevent->printk_map);
+ }
+
+ while (printklist) {
+ printknext = printklist->next;
+ free(printklist->printk);
+ free(printklist);
+ printklist = printknext;
+ }
+
+ for (i = 0; i < pevent->nr_events; i++)
+ pevent_free_format(pevent->events[i]);
+
+ while (pevent->handlers) {
+ handle = pevent->handlers;
+ pevent->handlers = handle->next;
+ free_handler(handle);
+ }
+
+ free(pevent->events);
+ free(pevent->sort_events);
+
+ free(pevent);
+}
+
+void pevent_unref(struct pevent *pevent)
+{
+ pevent_free(pevent);
+}
diff --git a/src/trace-seq.c b/src/trace-seq.c
new file mode 100644
index 0000000..1d5f0b4
--- /dev/null
+++ b/src/trace-seq.c
@@ -0,0 +1,250 @@
+/* Copied from tools/lib/traceevent/trace-seq.c and adapted to rasd */
+
+/*
+ * Copyright (C) 2009 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License (not later!)
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include <asm/bug.h>
+#include "event-parse.h"
+
+/*
+ * The TRACE_SEQ_POISON is to catch the use of using
+ * a trace_seq structure after it was destroyed.
+ */
+#define TRACE_SEQ_POISON ((void *)0xdeadbeef)
+#define TRACE_SEQ_CHECK(s) \
+do { \
+ if (WARN_ONCE((s)->buffer == TRACE_SEQ_POISON, \
+ "Usage of trace_seq after it was destroyed")) \
+ (s)->state = TRACE_SEQ__BUFFER_POISONED; \
+} while (0)
+
+#define TRACE_SEQ_CHECK_RET_N(s, n) \
+do { \
+ TRACE_SEQ_CHECK(s); \
+ if ((s)->state != TRACE_SEQ__GOOD) \
+ return n; \
+} while (0)
+
+#define TRACE_SEQ_CHECK_RET(s) TRACE_SEQ_CHECK_RET_N(s, )
+#define TRACE_SEQ_CHECK_RET0(s) TRACE_SEQ_CHECK_RET_N(s, 0)
+
+/**
+ * trace_seq_init - initialize the trace_seq structure
+ * @s: a pointer to the trace_seq structure to initialize
+ */
+void trace_seq_init(struct trace_seq *s)
+{
+ s->len = 0;
+ s->readpos = 0;
+ s->buffer_size = TRACE_SEQ_BUF_SIZE;
+ s->buffer = malloc(s->buffer_size);
+ if (s->buffer != NULL)
+ s->state = TRACE_SEQ__GOOD;
+ else
+ s->state = TRACE_SEQ__MEM_ALLOC_FAILED;
+}
+
+/**
+ * trace_seq_reset - re-initialize the trace_seq structure
+ * @s: a pointer to the trace_seq structure to reset
+ */
+void trace_seq_reset(struct trace_seq *s)
+{
+ if (!s)
+ return;
+ TRACE_SEQ_CHECK(s);
+ s->len = 0;
+ s->readpos = 0;
+}
+
+/**
+ * trace_seq_destroy - free up memory of a trace_seq
+ * @s: a pointer to the trace_seq to free the buffer
+ *
+ * Only frees the buffer, not the trace_seq struct itself.
+ */
+void trace_seq_destroy(struct trace_seq *s)
+{
+ if (!s)
+ return;
+ TRACE_SEQ_CHECK_RET(s);
+ free(s->buffer);
+ s->buffer = TRACE_SEQ_POISON;
+}
+
+static void expand_buffer(struct trace_seq *s)
+{
+ char *buf;
+
+ buf = realloc(s->buffer, s->buffer_size + TRACE_SEQ_BUF_SIZE);
+ if (WARN_ONCE(!buf, "Can't allocate trace_seq buffer memory")) {
+ s->state = TRACE_SEQ__MEM_ALLOC_FAILED;
+ return;
+ }
+
+ s->buffer = buf;
+ s->buffer_size += TRACE_SEQ_BUF_SIZE;
+}
+
+/**
+ * trace_seq_printf - sequence printing of trace information
+ * @s: trace sequence descriptor
+ * @fmt: printf format string
+ *
+ * It returns 0 if the trace oversizes the buffer's free
+ * space, 1 otherwise.
+ *
+ * The tracer may use either sequence operations or its own
+ * copy to user routines. To simplify formating of a trace
+ * trace_seq_printf is used to store strings into a special
+ * buffer (@s). Then the output may be either used by
+ * the sequencer or pulled into another buffer.
+ */
+int
+trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
+{
+ va_list ap;
+ int len;
+ int ret;
+
+ try_again:
+ TRACE_SEQ_CHECK_RET0(s);
+
+ len = (s->buffer_size - 1) - s->len;
+
+ va_start(ap, fmt);
+ ret = vsnprintf(s->buffer + s->len, len, fmt, ap);
+ va_end(ap);
+
+ if (ret >= len) {
+ expand_buffer(s);
+ goto try_again;
+ }
+
+ s->len += ret;
+
+ return 1;
+}
+
+/**
+ * trace_seq_vprintf - sequence printing of trace information
+ * @s: trace sequence descriptor
+ * @fmt: printf format string
+ *
+ * The tracer may use either sequence operations or its own
+ * copy to user routines. To simplify formating of a trace
+ * trace_seq_printf is used to store strings into a special
+ * buffer (@s). Then the output may be either used by
+ * the sequencer or pulled into another buffer.
+ */
+int
+trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
+{
+ int len;
+ int ret;
+
+ try_again:
+ TRACE_SEQ_CHECK_RET0(s);
+
+ len = (s->buffer_size - 1) - s->len;
+
+ ret = vsnprintf(s->buffer + s->len, len, fmt, args);
+
+ if (ret >= len) {
+ expand_buffer(s);
+ goto try_again;
+ }
+
+ s->len += ret;
+
+ return len;
+}
+
+/**
+ * trace_seq_puts - trace sequence printing of simple string
+ * @s: trace sequence descriptor
+ * @str: simple string to record
+ *
+ * The tracer may use either the sequence operations or its own
+ * copy to user routines. This function records a simple string
+ * into a special buffer (@s) for later retrieval by a sequencer
+ * or other mechanism.
+ */
+int trace_seq_puts(struct trace_seq *s, const char *str)
+{
+ int len;
+
+ TRACE_SEQ_CHECK_RET0(s);
+
+ len = strlen(str);
+
+ while (len > (((int) s->buffer_size - 1) - (int) s->len))
+ expand_buffer(s);
+
+ TRACE_SEQ_CHECK_RET0(s);
+
+ memcpy(s->buffer + s->len, str, len);
+ s->len += len;
+
+ return len;
+}
+
+int trace_seq_putc(struct trace_seq *s, unsigned char c)
+{
+ TRACE_SEQ_CHECK_RET0(s);
+
+ while (s->len >= (s->buffer_size - 1))
+ expand_buffer(s);
+
+ TRACE_SEQ_CHECK_RET0(s);
+
+ s->buffer[s->len++] = c;
+
+ return 1;
+}
+
+void trace_seq_terminate(struct trace_seq *s)
+{
+ TRACE_SEQ_CHECK_RET(s);
+
+ /* There's always one character left on the buffer */
+ s->buffer[s->len] = 0;
+}
+
+int trace_seq_do_printf(struct trace_seq *s)
+{
+ TRACE_SEQ_CHECK(s);
+
+ switch (s->state) {
+ case TRACE_SEQ__GOOD:
+ return printf("%.*s", s->len, s->buffer);
+ case TRACE_SEQ__BUFFER_POISONED:
+ puts("Usage of trace_seq after it was destroyed");
+ break;
+ case TRACE_SEQ__MEM_ALLOC_FAILED:
+ puts("Can't allocate trace_seq buffer memory");
+ break;
+ }
+ return -1;
+}
