![Tom Zanussi](/assets/img/avatar_default.png)
The Perl scripting support for perf trace allows most of a trace event's data to be accessed directly as handler arguments, but not all of it e.g. the less common fields aren't passed in. To give scripts access to the other fields and/or any other data or metadata in the main perf executable that might be useful, a way to access the C data in perf from Perl is needed; this patch uses the Perl XS facility to do it for the common_xxx event fields not passed to handler functions. Context.pm exports three functions to Perl scripts that access fields for the current event by calling back into perf: common_pc(), common_flags() and common_lock_depth(). Support for common_flags() field values was added to Core.pm and a script used to sanity check these and other basic scripting features, check-perf-trace.pl, was also added. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org Cc: anton@samba.org Cc: hch@infradead.org LKML-Reference: <1259133352-23685-6-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
286 lines
5.9 KiB
C
286 lines
5.9 KiB
C
#ifndef __PERF_TRACE_EVENTS_H
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#define __PERF_TRACE_EVENTS_H
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#include "parse-events.h"
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#define __unused __attribute__((unused))
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#ifndef PAGE_MASK
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#define PAGE_MASK (page_size - 1)
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#endif
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enum {
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RINGBUF_TYPE_PADDING = 29,
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RINGBUF_TYPE_TIME_EXTEND = 30,
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RINGBUF_TYPE_TIME_STAMP = 31,
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};
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#ifndef TS_SHIFT
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#define TS_SHIFT 27
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#endif
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#define NSECS_PER_SEC 1000000000ULL
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#define NSECS_PER_USEC 1000ULL
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enum format_flags {
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FIELD_IS_ARRAY = 1,
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FIELD_IS_POINTER = 2,
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FIELD_IS_SIGNED = 4,
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FIELD_IS_STRING = 8,
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FIELD_IS_DYNAMIC = 16,
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FIELD_IS_FLAG = 32,
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FIELD_IS_SYMBOLIC = 64,
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};
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struct format_field {
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struct format_field *next;
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char *type;
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char *name;
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int offset;
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int size;
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unsigned long flags;
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};
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struct format {
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int nr_common;
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int nr_fields;
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struct format_field *common_fields;
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struct format_field *fields;
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};
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struct print_arg_atom {
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char *atom;
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};
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struct print_arg_string {
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char *string;
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int offset;
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};
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struct print_arg_field {
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char *name;
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struct format_field *field;
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};
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struct print_flag_sym {
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struct print_flag_sym *next;
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char *value;
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char *str;
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};
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struct print_arg_typecast {
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char *type;
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struct print_arg *item;
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};
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struct print_arg_flags {
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struct print_arg *field;
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char *delim;
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struct print_flag_sym *flags;
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};
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struct print_arg_symbol {
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struct print_arg *field;
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struct print_flag_sym *symbols;
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};
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struct print_arg;
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struct print_arg_op {
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char *op;
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int prio;
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struct print_arg *left;
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struct print_arg *right;
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};
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struct print_arg_func {
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char *name;
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struct print_arg *args;
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};
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enum print_arg_type {
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PRINT_NULL,
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PRINT_ATOM,
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PRINT_FIELD,
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PRINT_FLAGS,
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PRINT_SYMBOL,
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PRINT_TYPE,
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PRINT_STRING,
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PRINT_OP,
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};
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struct print_arg {
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struct print_arg *next;
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enum print_arg_type type;
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union {
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struct print_arg_atom atom;
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struct print_arg_field field;
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struct print_arg_typecast typecast;
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struct print_arg_flags flags;
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struct print_arg_symbol symbol;
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struct print_arg_func func;
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struct print_arg_string string;
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struct print_arg_op op;
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};
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};
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struct print_fmt {
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char *format;
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struct print_arg *args;
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};
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struct event {
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struct event *next;
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char *name;
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int id;
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int flags;
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struct format format;
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struct print_fmt print_fmt;
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char *system;
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};
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enum {
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EVENT_FL_ISFTRACE = 0x01,
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EVENT_FL_ISPRINT = 0x02,
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EVENT_FL_ISBPRINT = 0x04,
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EVENT_FL_ISFUNC = 0x08,
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EVENT_FL_ISFUNCENT = 0x10,
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EVENT_FL_ISFUNCRET = 0x20,
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EVENT_FL_FAILED = 0x80000000
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};
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struct record {
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unsigned long long ts;
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int size;
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void *data;
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};
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struct record *trace_peek_data(int cpu);
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struct record *trace_read_data(int cpu);
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void parse_set_info(int nr_cpus, int long_sz);
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void trace_report(int fd);
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void *malloc_or_die(unsigned int size);
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void parse_cmdlines(char *file, int size);
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void parse_proc_kallsyms(char *file, unsigned int size);
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void parse_ftrace_printk(char *file, unsigned int size);
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void print_funcs(void);
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void print_printk(void);
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int parse_ftrace_file(char *buf, unsigned long size);
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int parse_event_file(char *buf, unsigned long size, char *sys);
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void print_event(int cpu, void *data, int size, unsigned long long nsecs,
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char *comm);
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extern int file_bigendian;
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extern int host_bigendian;
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int bigendian(void);
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static inline unsigned short __data2host2(unsigned short data)
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{
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unsigned short swap;
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if (host_bigendian == file_bigendian)
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return data;
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swap = ((data & 0xffULL) << 8) |
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((data & (0xffULL << 8)) >> 8);
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return swap;
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}
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static inline unsigned int __data2host4(unsigned int data)
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{
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unsigned int swap;
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if (host_bigendian == file_bigendian)
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return data;
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swap = ((data & 0xffULL) << 24) |
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((data & (0xffULL << 8)) << 8) |
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((data & (0xffULL << 16)) >> 8) |
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((data & (0xffULL << 24)) >> 24);
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return swap;
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}
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static inline unsigned long long __data2host8(unsigned long long data)
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{
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unsigned long long swap;
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if (host_bigendian == file_bigendian)
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return data;
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swap = ((data & 0xffULL) << 56) |
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((data & (0xffULL << 8)) << 40) |
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((data & (0xffULL << 16)) << 24) |
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((data & (0xffULL << 24)) << 8) |
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((data & (0xffULL << 32)) >> 8) |
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((data & (0xffULL << 40)) >> 24) |
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((data & (0xffULL << 48)) >> 40) |
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((data & (0xffULL << 56)) >> 56);
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return swap;
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}
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#define data2host2(ptr) __data2host2(*(unsigned short *)ptr)
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#define data2host4(ptr) __data2host4(*(unsigned int *)ptr)
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#define data2host8(ptr) __data2host8(*(unsigned long long *)ptr)
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extern int header_page_ts_offset;
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extern int header_page_ts_size;
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extern int header_page_size_offset;
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extern int header_page_size_size;
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extern int header_page_data_offset;
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extern int header_page_data_size;
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extern int latency_format;
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int parse_header_page(char *buf, unsigned long size);
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int trace_parse_common_type(void *data);
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int trace_parse_common_pid(void *data);
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int parse_common_pc(void *data);
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int parse_common_flags(void *data);
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int parse_common_lock_depth(void *data);
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struct event *trace_find_event(int id);
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struct event *trace_find_next_event(struct event *event);
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unsigned long long read_size(void *ptr, int size);
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unsigned long long
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raw_field_value(struct event *event, const char *name, void *data);
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void *raw_field_ptr(struct event *event, const char *name, void *data);
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unsigned long long eval_flag(const char *flag);
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int read_tracing_data(int fd, struct perf_event_attr *pattrs, int nb_events);
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/* taken from kernel/trace/trace.h */
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enum trace_flag_type {
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TRACE_FLAG_IRQS_OFF = 0x01,
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TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
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TRACE_FLAG_NEED_RESCHED = 0x04,
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TRACE_FLAG_HARDIRQ = 0x08,
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TRACE_FLAG_SOFTIRQ = 0x10,
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};
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struct scripting_ops {
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const char *name;
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int (*start_script) (const char *);
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int (*stop_script) (void);
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void (*process_event) (int cpu, void *data, int size,
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unsigned long long nsecs, char *comm);
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int (*generate_script) (const char *outfile);
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};
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int script_spec_register(const char *spec, struct scripting_ops *ops);
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extern struct scripting_ops perl_scripting_ops;
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void setup_perl_scripting(void);
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#endif /* __PERF_TRACE_EVENTS_H */
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