* [Bug default/27643] New: [dwz] more low mem memory leaks
@ 2021-03-24 8:40 vries at gcc dot gnu.org
2021-03-24 8:43 ` [Bug default/27643] " vries at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2021-03-24 8:40 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27643
Bug ID: 27643
Summary: [dwz] more low mem memory leaks
Product: dwz
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: default
Assignee: nobody at sourceware dot org
Reporter: vries at gcc dot gnu.org
CC: dwz at sourceware dot org
Target Milestone: ---
After applying this patch to make the problem visible:
...
diff --git a/testsuite/dwz.tests/twice-multifile.sh
b/testsuite/dwz.tests/twice-multifile.s
h
index 8a66e25..1ff0166 100644
--- a/testsuite/dwz.tests/twice-multifile.sh
+++ b/testsuite/dwz.tests/twice-multifile.sh
@@ -24,7 +24,10 @@ if [ $(grep -qv "DWARF compression not beneficial" dwz.err \
exit 1
fi
-[ $status -eq 0 ]
+if [ $status -ne 0 ]; then
+ cat dwz.err
+ exit 1
+fi
smaller-than.sh 1 1.saved
...
we have:
...
Running /home/vries/dwz/dwz.git/testsuite/dwz.tests/dwz-tests.exp ...
dwz: 1: DWARF compression not beneficial - old size 3372 new size 3372
dwz: 2: DWARF compression not beneficial - old size 3372 new size 3372
=================================================================
==14974==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 432 byte(s) in 6 object(s) allocated from:
#0 0x7fc5a266d6d8 in __interceptor_calloc (/usr/lib64/libasan.so.4+0xdc6d8)
#1 0x475dc1 in htab_try_create /home/vries/dwz/dwz.git/hashtab.c:164
#2 0x44c610 in build_abbrevs /home/vries/dwz/dwz.git/dwz.c:11230
#3 0x44ee00 in compute_abbrevs /home/vries/dwz/dwz.git/dwz.c:11510
#4 0x46f07c in dwz /home/vries/dwz/dwz.git/dwz.c:15396
#5 0x474e0d in dwz_files_1 /home/vries/dwz/dwz.git/dwz.c:16327
#6 0x475699 in dwz_files /home/vries/dwz/dwz.git/dwz.c:16417
#7 0x4759fc in main /home/vries/dwz/dwz.git/dwz.c:16458
#8 0x7fc5a1fe2349 in __libc_start_main (/lib64/libc.so.6+0x24349)
Indirect leak of 2928 byte(s) in 6 object(s) allocated from:
#0 0x7fc5a266d6d8 in __interceptor_calloc (/usr/lib64/libasan.so.4+0xdc6d8)
#1 0x475de7 in htab_try_create /home/vries/dwz/dwz.git/hashtab.c:168
#2 0x44c610 in build_abbrevs /home/vries/dwz/dwz.git/dwz.c:11230
#3 0x44ee00 in compute_abbrevs /home/vries/dwz/dwz.git/dwz.c:11510
#4 0x46f07c in dwz /home/vries/dwz/dwz.git/dwz.c:15396
#5 0x474e0d in dwz_files_1 /home/vries/dwz/dwz.git/dwz.c:16327
#6 0x475699 in dwz_files /home/vries/dwz/dwz.git/dwz.c:16417
#7 0x4759fc in main /home/vries/dwz/dwz.git/dwz.c:16458
#8 0x7fc5a1fe2349 in __libc_start_main (/lib64/libc.so.6+0x24349)
SUMMARY: AddressSanitizer: 3360 byte(s) leaked in 12 allocation(s).
child process exited abnormally
FAIL: /home/vries/dwz/dwz.git/testsuite/dwz.tests/twice-multifile.sh
...
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* [Bug default/27643] [dwz] more low mem memory leaks
2021-03-24 8:40 [Bug default/27643] New: [dwz] more low mem memory leaks vries at gcc dot gnu.org
@ 2021-03-24 8:43 ` vries at gcc dot gnu.org
2021-03-24 9:06 ` [Bug default/27643] [dwz] build_abbrevs memory leak vries at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2021-03-24 8:43 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27643
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
To reproduce:
...
$ make hello; cp hello 1; ./dwz 1; cp 1 2; ./dwz -m 3 1 2
...
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* [Bug default/27643] [dwz] build_abbrevs memory leak
2021-03-24 8:40 [Bug default/27643] New: [dwz] more low mem memory leaks vries at gcc dot gnu.org
2021-03-24 8:43 ` [Bug default/27643] " vries at gcc dot gnu.org
@ 2021-03-24 9:06 ` vries at gcc dot gnu.org
2021-03-24 10:52 ` vries at gcc dot gnu.org
2021-03-24 17:08 ` vries at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2021-03-24 9:06 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27643
Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[dwz] more low mem memory |[dwz] build_abbrevs memory
|leaks |leak
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
OK, the test run was on top of a few proposed patches, which moves the
dwz_with_low_mem call into a separate process, such that we only see the
problem later, which explains why we don't see dwz_with_low_mem in comment 0.
On trunk, we do get dwz_with_low_mem instead of dwz:
...
Direct leak of 432 byte(s) in 6 object(s) allocated from:
#0 0x7f8d6a37d6d8 in __interceptor_calloc (/usr/lib64/libasan.so.4+0xdc6d8)
#1 0x475e34 in htab_try_create /home/vries/dwz/dwz.git/hashtab.c:164
#2 0x44c610 in build_abbrevs /home/vries/dwz/dwz.git/dwz.c:11230
#3 0x44ee00 in compute_abbrevs /home/vries/dwz/dwz.git/dwz.c:11510
#4 0x46f07c in dwz /home/vries/dwz/dwz.git/dwz.c:15396
#5 0x4748f5 in dwz_with_low_mem /home/vries/dwz/dwz.git/dwz.c:16274
#6 0x474eb5 in dwz_files_1 /home/vries/dwz/dwz.git/dwz.c:16343
#7 0x47570c in dwz_files /home/vries/dwz/dwz.git/dwz.c:16427
#8 0x475a6f in main /home/vries/dwz/dwz.git/dwz.c:16468
#9 0x7f8d69cf2349 in __libc_start_main (/lib64/libc.so.6+0x24349)
...
Anyway, looks like the problem is not specific to low-mem, adapting summary.
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* [Bug default/27643] [dwz] build_abbrevs memory leak
2021-03-24 8:40 [Bug default/27643] New: [dwz] more low mem memory leaks vries at gcc dot gnu.org
2021-03-24 8:43 ` [Bug default/27643] " vries at gcc dot gnu.org
2021-03-24 9:06 ` [Bug default/27643] [dwz] build_abbrevs memory leak vries at gcc dot gnu.org
@ 2021-03-24 10:52 ` vries at gcc dot gnu.org
2021-03-24 17:08 ` vries at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2021-03-24 10:52 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27643
--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Tentative patch:
...
diff --git a/dwz.c b/dwz.c
index c115b54..b212d6d 100644
--- a/dwz.c
+++ b/dwz.c
@@ -15092,10 +15092,15 @@ write_multifile (DSO *dso)
dw_cu_ref *cup;
for (cup = &first_cu; *cup && (*cup)->cu_kind != CU_TYPES; )
- if ((*cup)->cu_die->die_no_multifile == 0)
- cup = &(*cup)->cu_next;
- else
- *cup = (*cup)->cu_next;
+ {
+ if ((*cup)->cu_new_abbrev)
+ htab_delete ((*cup)->cu_new_abbrev);
+
+ if ((*cup)->cu_die->die_no_multifile == 0)
+ cup = &(*cup)->cu_next;
+ else
+ *cup = (*cup)->cu_next;
+ }
*cup = NULL;
multifile_mode = MULTIFILE_MODE_WR;
if (tracing)
...
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* [Bug default/27643] [dwz] build_abbrevs memory leak
2021-03-24 8:40 [Bug default/27643] New: [dwz] more low mem memory leaks vries at gcc dot gnu.org
` (2 preceding siblings ...)
2021-03-24 10:52 ` vries at gcc dot gnu.org
@ 2021-03-24 17:08 ` vries at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2021-03-24 17:08 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27643
Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
https://sourceware.org/git/?p=dwz.git;a=commit;h=e948e307737dd7034692b886b07522aba8c98415
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2021-03-24 8:43 ` [Bug default/27643] " vries at gcc dot gnu.org
2021-03-24 9:06 ` [Bug default/27643] [dwz] build_abbrevs memory leak vries at gcc dot gnu.org
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