Description of Problem: Running a threaded application with memusage causes a segmentation violation in the memusage code. How Reproducible: See attachment (main.c) for a sample threaded application that breaks memusage. Steps to Reproduce: 1. gcc -o main main.c 2. memusage ./main 3. OR memusage --no-timer ./main Actual Results: $ memusage ./main /usr/bin/memusage: line 1: 1837 Segmentation fault (core dumped) LD_PRELOAD=/lib/libmemusage.so "$@" $ memusage --no-timer ./main /usr/bin/memusage: line 1: 1839 Segmentation fault (core dumped) LD_PRELOAD=/lib/libmemusage.so MEMUSAGE_NO_TIMER=yes "$@" Expected Results: Program runs to completion w/ histogram output of memory usage. Additional Information: Will attach the source file shortly.
Created attachment 25792 [details] A threaded application that breaks memusage.
A slight correction on building the main program... gcc -o main main.c -lpthread I also tried (just in case...) gcc -D_REENTRANT -o main main.c -lpthread and they continue to fail with the segmentation violation.
Should be fixed by http://sources.redhat.com/ml/libc-hacker/2001-08/msg00018.html. This will appear probably in glibc-2.2.4-3.
Thanks for the fix. That certainly helps the start up problem but may have uncovered another bug. I got the following output from a threaded app that uses about 34 meg of memory... Memory usage summary: heap total: 30733622, heap peak: 30731086, stack peak: 2143715564 total calls total memory failed calls malloc| 312 30732854 0 realloc| 0 0 0 (in place: 0, dec: 0) calloc| 6 768 0 free| 15 2536 Note the "stack peak" at about 2G. Should I submit this as a new bug? Thanks.
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