From: Adrian Hunter adrian.hunter@intel.com
commit cf129830ee820f7fc90b98df193cd49d49344d09 upstream.
When a match has been made to the nth duplicate symbol, return success not error.
Example:
Before:
$ cat file.c cat: file.c: No such file or directory $ cat file1.c #include <stdio.h>
static void func(void) { printf("First func\n"); }
void other(void);
int main() { func(); other(); return 0; } $ cat file2.c #include <stdio.h>
static void func(void) { printf("Second func\n"); }
void other(void) { func(); }
$ gcc -Wall -Wextra -o test file1.c file2.c $ perf record -e intel_pt//u --filter 'filter func @ ./test' -- ./test Multiple symbols with name 'func' #1 0x1149 l func which is near main #2 0x1179 l func which is near other Disambiguate symbol name by inserting #n after the name e.g. func #2 Or select a global symbol by inserting #0 or #g or #G Failed to parse address filter: 'filter func @ ./test' Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>] Where multiple filters are separated by space or comma. $ perf record -e intel_pt//u --filter 'filter func #2 @ ./test' -- ./test Failed to parse address filter: 'filter func #2 @ ./test' Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>] Where multiple filters are separated by space or comma.
After:
$ perf record -e intel_pt//u --filter 'filter func #2 @ ./test' -- ./test First func Second func [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.016 MB perf.data ] $ perf script --itrace=b -Ftime,flags,ip,sym,addr --ns 1231062.526977619: tr strt 0 [unknown] => 558495708179 func 1231062.526977619: tr end call 558495708188 func => 558495708050 _init 1231062.526979286: tr strt 0 [unknown] => 55849570818d func 1231062.526979286: tr end return 55849570818f func => 55849570819d other
Fixes: 1b36c03e356936d6 ("perf record: Add support for using symbols in address filters") Reported-by: Dmitrii Dolgov 9erthalion6@gmail.com Signed-off-by: Adrian Hunter adrian.hunter@intel.com Tested-by: Dmitry Dolgov 9erthalion6@gmail.com Cc: Adrian Hunter adrian.hunter@intel.com Cc: Ian Rogers irogers@google.com Cc: Jiri Olsa jolsa@kernel.org Cc: Namhyung Kim namhyung@kernel.org Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230110185659.15979-1-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/perf/util/auxtrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -1945,7 +1945,7 @@ static int find_dso_sym(struct dso *dso, *size = sym->start - *start; if (idx > 0) { if (*size) - return 1; + return 0; } else if (dso_sym_match(sym, sym_name, &cnt, idx)) { print_duplicate_syms(dso, sym_name); return -EINVAL;