Bug 43569 - libgomp: Conditional jump or move depends on uninitialised value
Summary: libgomp: Conditional jump or move depends on uninitialised value
Status: RESOLVED FIXED
Alias: None
Product: gcc
Classification: Unclassified
Component: libgomp (show other bugs)
Version: 4.5.0
: P3 normal
Target Milestone: 4.4.4
Assignee: Jakub Jelinek
URL:
Keywords: openmp
Depends on:
Blocks:
 
Reported: 2010-03-29 14:03 UTC by Tobias Burnus
Modified: 2010-04-21 14:07 UTC (History)
1 user (show)

See Also:
Host:
Target:
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Known to work:
Known to fail:
Last reconfirmed:

Attachments
gcc46-pr43569.patch (660 bytes, patch)
2010-04-20 09:54 UTC, Jakub Jelinek 		Details | Diff
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Description Tobias Burnus 2010-03-29 14:03:18 UTC 
$ cd libgomp/testsuite/libgomp.fortran
$ gfortran -g -fopenmp allocatable5.f90
$ valgrind ./a.out

shows with 4.5.0 20100329 on a dual-core x86_64-unknown-linux-gnu:

==16553== Conditional jump or move depends on uninitialised value(s)
==16553==    at 0x536E12E: gomp_iter_dynamic_next (iter.c:190)
==16553==    by 0x5370A19: GOMP_sections_start (sections.c:65)
==16553==    by 0x400D65: MAIN__.omp_fn.0 (allocatable5.f90:9)
==16553==    by 0x400BD0: MAIN__ (allocatable5.f90:8)
==16553==    by 0x400CAC: main (allocatable5.f90:17)
==16553==
==16553== Conditional jump or move depends on uninitialised value(s)
==16553==    at 0x536E12E: gomp_iter_dynamic_next (iter.c:190)
==16553==    by 0x5370A50: GOMP_sections_next (sections.c:96)
==16553==    by 0x400E54: MAIN__.omp_fn.0 (allocatable5.f90:9)
==16553==    by 0x400BD0: MAIN__ (allocatable5.f90:8)
==16553==    by 0x400CAC: main (allocatable5.f90:17)
==16553==
==16553== Thread 2:
==16553== Conditional jump or move depends on uninitialised value(s)
==16553==    at 0x536E12E: gomp_iter_dynamic_next (iter.c:190)
==16553==    by 0x5370A19: GOMP_sections_start (sections.c:65)
==16553==    by 0x400D65: MAIN__.omp_fn.0 (allocatable5.f90:9)
==16553==    by 0x5371721: gomp_thread_start (team.c:115)
==16553==    by 0x5793A3E: start_thread (in /lib64/libpthread-2.11.1.so)
==16553==    by 0x5A7AC1C: clone (in /lib64/libc-2.11.1.so)
Comment 1 Tobias Burnus 2010-03-29 14:12:54 UTC 
Analogously for omp_parse1.f90, reduction5.f90.

Same output for GCC 4.4.4.
Comment 2 Jakub Jelinek 2010-04-20 09:54:43 UTC 
Created attachment 20440 [details]
gcc46-pr43569.patch

Fix.
Comment 3 Jakub Jelinek 2010-04-20 15:37:06 UTC 
Subject: Bug 43569

Author: jakub
Date: Tue Apr 20 15:36:45 2010
New Revision: 158564

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=158564
Log:
	PR libgomp/43569
	* sections.c (gomp_sections_init): Initialize ws->mode.

Modified:
    trunk/libgomp/ChangeLog
    trunk/libgomp/sections.c
Comment 4 Jakub Jelinek 2010-04-21 13:59:05 UTC 
Subject: Bug 43569

Author: jakub
Date: Wed Apr 21 13:58:49 2010
New Revision: 158598

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=158598
Log:
	PR libgomp/43569
	* sections.c (gomp_sections_init): Initialize ws->mode.

Modified:
    branches/gcc-4_5-branch/libgomp/ChangeLog
    branches/gcc-4_5-branch/libgomp/sections.c
Comment 5 Jakub Jelinek 2010-04-21 13:59:12 UTC 
Subject: Bug 43569

Author: jakub
Date: Wed Apr 21 13:58:59 2010
New Revision: 158599

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=158599
Log:
	PR libgomp/43569
	* sections.c (gomp_sections_init): Initialize ws->mode.

Modified:
    branches/gcc-4_4-branch/libgomp/ChangeLog
    branches/gcc-4_4-branch/libgomp/sections.c
Comment 6 Jakub Jelinek 2010-04-21 14:05:15 UTC 
Fixed for 4.4.4/4.5.1/4.6.