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authorAndi Kleen <ak@linux.intel.com>2018-12-04 03:18:48 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-12-17 20:57:07 +0300
commitdd2e18e9ac20e3ffc27cabf318e83b43ed5ddb92 (patch)
treedc66716b24bad19fbb27f572e31541a9169c4000 /tools/perf/util/map.c
parent42da438c1bc4ad9b904401aff03678ddbf1329b0 (diff)
downloadlinux-dd2e18e9ac20e3ffc27cabf318e83b43ed5ddb92.tar.xz
perf tools: Support 'srccode' output
When looking at PT or brstackinsn traces with 'perf script' it can be very useful to see the source code. This adds a simple facility to print them with 'perf script', if the information is available through dwarf % perf record ... % perf script -F insn,ip,sym,srccode ... 4004c6 main 5 for (i = 0; i < 10000000; i++) 4004cd main 5 for (i = 0; i < 10000000; i++) 4004c6 main 5 for (i = 0; i < 10000000; i++) 4004cd main 5 for (i = 0; i < 10000000; i++) 4004cd main 5 for (i = 0; i < 10000000; i++) 4004cd main 5 for (i = 0; i < 10000000; i++) 4004cd main 5 for (i = 0; i < 10000000; i++) 4004cd main 5 for (i = 0; i < 10000000; i++) 4004b3 main 6 v++; % perf record -b ... % perf script -F insn,ip,sym,srccode,brstackinsn ... main+22: 0000000000400543 insn: e8 ca ff ff ff # PRED |18 f1(); f1: 0000000000400512 insn: 55 |10 { 0000000000400513 insn: 48 89 e5 0000000000400516 insn: b8 00 00 00 00 |11 f2(); 000000000040051b insn: e8 d6 ff ff ff # PRED f2: 00000000004004f6 insn: 55 |5 { 00000000004004f7 insn: 48 89 e5 00000000004004fa insn: 8b 05 2c 0b 20 00 |6 c = a / b; 0000000000400500 insn: 8b 0d 2a 0b 20 00 0000000000400506 insn: 99 0000000000400507 insn: f7 f9 0000000000400509 insn: 89 05 29 0b 20 00 000000000040050f insn: 90 |7 } 0000000000400510 insn: 5d 0000000000400511 insn: c3 # PRED f1+14: 0000000000400520 insn: b8 00 00 00 00 |12 f2(); 0000000000400525 insn: e8 cc ff ff ff # PRED f2: 00000000004004f6 insn: 55 |5 { 00000000004004f7 insn: 48 89 e5 00000000004004fa insn: 8b 05 2c 0b 20 00 |6 c = a / b; Not supported for callchains currently, would need some layout changes there. Committer notes: Fixed the build on Alpine Linux (3.4 .. 3.8) by addressing this warning: In file included from util/srccode.c:19:0: /usr/include/sys/fcntl.h:1:2: error: #warning redirecting incorrect #include <sys/fcntl.h> to <fcntl.h> [-Werror=cpp] #warning redirecting incorrect #include <sys/fcntl.h> to <fcntl.h> ^~~~~~~ cc1: all warnings being treated as errors Signed-off-by: Andi Kleen <ak@linux.intel.com> Tested-by: Jiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/20181204001848.24769-1-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/map.c')
-rw-r--r--tools/perf/util/map.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index a0d58b4d9c32..6751301a755c 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -19,6 +19,7 @@
#include "srcline.h"
#include "namespaces.h"
#include "unwind.h"
+#include "srccode.h"
static void __maps__insert(struct maps *maps, struct map *map);
static void __maps__insert_name(struct maps *maps, struct map *map);
@@ -421,6 +422,54 @@ int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
return ret;
}
+int map__fprintf_srccode(struct map *map, u64 addr,
+ FILE *fp,
+ struct srccode_state *state)
+{
+ char *srcfile;
+ int ret = 0;
+ unsigned line;
+ int len;
+ char *srccode;
+
+ if (!map || !map->dso)
+ return 0;
+ srcfile = get_srcline_split(map->dso,
+ map__rip_2objdump(map, addr),
+ &line);
+ if (!srcfile)
+ return 0;
+
+ /* Avoid redundant printing */
+ if (state &&
+ state->srcfile &&
+ !strcmp(state->srcfile, srcfile) &&
+ state->line == line) {
+ free(srcfile);
+ return 0;
+ }
+
+ srccode = find_sourceline(srcfile, line, &len);
+ if (!srccode)
+ goto out_free_line;
+
+ ret = fprintf(fp, "|%-8d %.*s", line, len, srccode);
+ state->srcfile = srcfile;
+ state->line = line;
+ return ret;
+
+out_free_line:
+ free(srcfile);
+ return ret;
+}
+
+
+void srccode_state_free(struct srccode_state *state)
+{
+ zfree(&state->srcfile);
+ state->line = 0;
+}
+
/**
* map__rip_2objdump - convert symbol start address to objdump address.
* @map: memory map