https://bugs.kde.org/show_bug.cgi?id=471032
Bug ID: 471032
Summary: s390x: helgrind/tests/tc11_XCHG.c expects code to be
at a low address space
Classification: Developer tools
Product: valgrind
Version: 3.22 GIT
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: helgrind
Assignee: jsew...@acm.org
Reporter: tul...@quites.com.br
Target Milestone: ---
Created attachment 159659
--> https://bugs.kde.org/attachment.cgi?id=159659&action=edit
Suggested fix for this issue
SUMMARY
The bne instruction used in the s390x implementation of XCHG_M_R(_addr,_lval)
expects an absolute address and shouldn't be used in this case.
I'm attaching a patch fixing this issue.
STEPS TO REPRODUCE
1. ./configure && make && make check
2. Disassemble the test with: objdump -d ./helgrind/tests/tc11_XCHG | less
OBSERVED RESULT
Look for the child_fn function and see how bne (address 0x100128e) may jump to
nowhere (address 646):
0000000001001260 <child_fn>:
...
1001286: 58 00 20 00 l %r0,0(%r2)
100128a: ba 01 20 00 cs %r0,%r1,0(%r2)
100128e: 47 70 02 86 bne 646
EXPECTED RESULT
That instruction should jump to 2 instructions before at address 0x1001286.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
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