redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

perf/urgent fix: 

. Two functions from different binaries can have same start address. Thus,
   comparing only start address in match_chain() leads to inconsistent
   callchains. Fix this by adding a check for dsos as well (Ravi Bangoria)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEELb9bqkb7Te0zijNb1lAW81NSqkAFAlnWcjwACgkQ1lAW81NS
 qkD68A/9ERmY8DOKjUKudjLC2MtbN+BGhZNlFbKseNTouicFOSvEQxEP4lPAQbEE
 jdv8GvJppcrmXjqFBNjncKJxemldv6JIQNnOLB48wAhNVGld59qecC/piwFR/L94
 NIj8kCRvT1/wtCzgf22pGrLOb/EoHYVjGxYjSiohe10mWfrLTxErULTWX/2q42vX
 0eVL5dC4TKNKiLiVK2Yy/meXIPs6D+9EQh6hcQYOOjtxANnwU5yejDLlZrCaPPAT
 EF9DZ6I1bB04w6pp685mi5gGI+zDt5pOxpxAQldHAuyTomvty2bcWfm4Tve5UVoL
 /Kyrq5QbtQEFLF47w2wW3P+DG5gY5CR9L7U4Fzw8IbEnUuKfi32VANc5yvnpqfpp
 G+dNl4DugEBLgr3M9X5JDvVID4BWcbaYsGWtgQNMLncaB/O8uqDH3gkxPHabG/R0
 TNfMJpCUP3945F87I24r/um2l4vJgHPkbNAvW39dqiYHEIJXKh1ASTCTdXr6YKG/
 VRL63rYDjfhw+CyF+TRfNfpbRleL3w5pTVuRwEh5m6r+q5ybMi5q6JY3vzCI5Y1P
 LnB2CX2u3rZduh7DB9rWBs0NLuIdA7R3cbSn3ZkbviK8FEjktgOgSd58byYrGdxF
 opGqZ1QAh+plu2KzksGVvAPk8AZh7djZIjuMMuRSTXkl31EHEs4=
 =U+wc
 -----END PGP SIGNATURE-----

Merge tag 'perf-urgent-for-mingo-4.14-20171005' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fix from Arnaldo Carvalho de Melo:

- Two functions from different binaries can have the same start address. Thus,
  comparing only the start address in match_chain() leads to inconsistent
  callchains. Fix this by adding a check for DSOs as well (Ravi Bangoria)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
zero-colors
Ingo Molnar 2017-10-05 20:07:08 +02:00
parent 77ede3a014 c1fbc0cf81
commit 874d48f2af
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/perf/util/callchain.c
View File

@ -685,6 +685,8 @@ static enum match_result match_chain(struct callchain_cursor_node *node,
{
struct symbol *sym = node->sym;
u64 left, right;
struct dso *left_dso = NULL;
struct dso *right_dso = NULL;
if (callchain_param.key == CCKEY_SRCLINE) {
enum match_result match = match_chain_srcline(node, cnode);
@ -696,12 +698,14 @@ static enum match_result match_chain(struct callchain_cursor_node *node,
if (cnode->ms.sym && sym && callchain_param.key == CCKEY_FUNCTION) {
left = cnode->ms.sym->start;
right = sym->start;
left_dso = cnode->ms.map->dso;
right_dso = node->map->dso;
} else {
left = cnode->ip;
right = node->ip;
}
if (left == right) {
if (left == right && left_dso == right_dso) {
if (node->branch) {
cnode->branch_count++;