| Summary: | Uninitialized variable of type double is reported twice in intel-compiled application. | ||
|---|---|---|---|
| Product: | [Developer tools] valgrind | Reporter: | Tanya <tatyana.a.volnina> |
| Component: | memcheck | Assignee: | Julian Seward <jseward> |
| Status: | RESOLVED NOT A BUG | ||
| Severity: | minor | CC: | tom |
| Priority: | NOR | ||
| Version First Reported In: | 3.10 SVN | ||
| Target Milestone: | --- | ||
| Platform: | RedHat Enterprise Linux | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed/Implemented In: | ||
| Sentry Crash Report: | |||
| Attachments: | a reproducer application | ||
Unfortunately because you've blanked out the addresses it's hard to tell what's going on here... If the addresses are different then the answer would seem to be simply that the compiler is generating code that reads the variable twice. Even if they're the same then the only reasonable explanation I can see is that the compiled code is passing through that instruction twice when run. In short I suspect this is simply an artefact of the code generated by the compiler rather than any bug in valgrind. Tom Hughes, yes, you are correct, the variable is actually read twice. Please feel free to close/discard the ticket. Thanks for confirming that. |
Created attachment 96257 [details] a reproducer application If an application is built with intel compiler, memcheck reports uninitialized variables of type double twice. Steps to build and run the test: icc -O0 double_report.c -o double_report_icc valgrind -q ./double_report_icc A reproducer (double_report.c) is attached. Expected result (reported for gcc-compiled application): ==xxxx== Conditional jump or move depends on uninitialised value(s) ==xxxx== at 0xxxxxxx: main (in /<file_path>/double_report_icc) ==xxxx== Actual result: ==xxxx== Conditional jump or move depends on uninitialised value(s) ==xxxx== at 0xxxxxxx: main (in /<file_path>/double_report_icc) ==xxxx== ==xxxx== Conditional jump or move depends on uninitialised value(s) ==xxxx== at 0xxxxxxx: main (in /<file_path>/double_report_icc) ==xxxx==