Messages in this thread Patch in this message | | | From | Tom Zanussi <> | Subject | [PATCH 09/12] perf tools: save syscall map | Date | Wed, 27 Jan 2010 02:28:00 -0600 |
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Read the exported syscall metadata and save it in the trace file for post-processing tools.
Signed-off-by: Tom Zanussi <tzanussi@gmail.com> --- tools/perf/util/trace-event-info.c | 25 ++++++++++++++ tools/perf/util/trace-event-parse.c | 63 +++++++++++++++++++++++++++++++++++ tools/perf/util/trace-event-read.c | 18 ++++++++++ tools/perf/util/trace-event.h | 10 +++++ 4 files changed, 116 insertions(+), 0 deletions(-)
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c index 5ea8973..6a6e5cc 100644 --- a/tools/perf/util/trace-event-info.c +++ b/tools/perf/util/trace-event-info.c @@ -461,6 +461,30 @@ out: put_tracing_file(path); } +static void read_syscall_map(void) +{ + unsigned int size, check_size; + char *path; + struct stat st; + int ret; + + path = get_tracing_file("syscall_map"); + ret = stat(path, &st); + if (ret < 0) { + /* not found */ + size = 0; + write_or_die(&size, 4); + goto out; + } + size = get_size(path); + write_or_die(&size, 4); + check_size = copy_file(path); + if (size != check_size) + die("error in size of file '%s'", path); +out: + put_tracing_file(path); +} + static struct tracepoint_path * get_tracepoints_path(struct perf_event_attr *pattrs, int nb_events) { @@ -523,6 +547,7 @@ int read_tracing_data(int fd, struct perf_event_attr *pattrs, int nb_events) read_event_files(tps); read_proc_kallsyms(); read_ftrace_printk(); + read_syscall_map(); return 0; } diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c index c1299ff..31bb6f2 100644 --- a/tools/perf/util/trace-event-parse.c +++ b/tools/perf/util/trace-event-parse.c @@ -336,6 +336,69 @@ void print_printk(void) } } +static struct syscall_metadata *syscalls; +static int syscall_count; + +void parse_syscall_map(char *file, int size __unused) +{ + struct syscall_list { + struct syscall_list *next; + char *name; + int nr; + } *list = NULL, *item; + char *line; + char *next = NULL; + int i; + + line = strtok_r(file, "\n", &next); + while (line) { + item = malloc_or_die(sizeof(*item)); + sscanf(line, "%d:%as", &item->nr, + (float *)(void *)&item->name); /* workaround gcc warning */ + item->next = list; + list = item; + line = strtok_r(NULL, "\n", &next); + syscall_count++; + } + + syscalls = malloc_or_die(sizeof(*syscalls) * syscall_count); + + i = 0; + while (list) { + syscalls[i].nr = list->nr; + syscalls[i].name = list->name; + i++; + item = list; + list = list->next; + free(item); + } +} + +int nr_syscalls(void) +{ + return syscall_count; +} + +const struct syscall_metadata *syscall_at_idx(int idx) +{ + if (idx >= syscall_count) + return NULL; + + return &syscalls[idx]; +} + +const struct syscall_metadata *find_syscall(int syscall_nr) +{ + int i; + + for (i = 0; i < syscall_count; i++) { + if (syscalls[i].nr == syscall_nr) + return &syscalls[i]; + } + + return NULL; +} + static struct event *alloc_event(void) { struct event *event; diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c index 1744422..70fcaec 100644 --- a/tools/perf/util/trace-event-read.c +++ b/tools/perf/util/trace-event-read.c @@ -171,6 +171,23 @@ static void read_ftrace_printk(void) free(buf); } +static void read_syscall_map(void) +{ + unsigned int size; + char *buf; + + size = read4(); + if (!size) + return; + + buf = malloc_or_die(size); + read_or_die(buf, size); + + parse_syscall_map(buf, size); + + free(buf); +} + static void read_header_files(void) { unsigned long long size; @@ -498,6 +515,7 @@ void trace_report(int fd) read_event_files(); read_proc_kallsyms(); read_ftrace_printk(); + read_syscall_map(); if (show_funcs) { print_funcs(); diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h index c3269b9..5313ad8 100644 --- a/tools/perf/util/trace-event.h +++ b/tools/perf/util/trace-event.h @@ -178,6 +178,16 @@ int parse_event_file(char *buf, unsigned long size, char *sys); void print_event(int cpu, void *data, int size, unsigned long long nsecs, char *comm); +struct syscall_metadata { + char *name; + int nr; +}; + +void parse_syscall_map(char *file, int size); +int nr_syscalls(void); +const struct syscall_metadata *syscall_at_idx(int idx); +const struct syscall_metadata *find_syscall(int syscall_nr); + extern int file_bigendian; extern int host_bigendian; -- 1.6.4.GIT
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