https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84439
Bug ID: 84439 Summary: call to backtrace fails after about 6000 iterations (32-bit executable) Product: gcc Version: 4.8.5 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libfortran Assignee: unassigned at gcc dot gnu.org Reporter: kapfell at gmx dot de Target Milestone: --- Created attachment 43448 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43448&action=edit Test calling backtrace() repeatedly, fails after about 5600 iteration (32-bit executable) There appears to be a memory leak in backtrace(). At about 5500 iterations mmap complains about insufficient memory and stack trace no longer shows function names: [...] #0 0xf7667245 in ??? #1 0xf7667289 in ??? #2 0x804874b in fun5_ at [...]/gf_backtrace.f:44 #3 0x80486c6 in fun4_ at [...]/gf_backtrace.f:37 #4 0x80486b3 in fun3_ at [...]/gf_backtrace.f:31 #5 0x80486a0 in fun2_ at [...]/gf_backtrace.f:25 #6 0x804868d in fun1_ at [...]/gf_backtrace.f:19 #7 0x804877b in testbacktrace at [...]/gf_backtrace.f:12 #8 0x80487ce in main at [...]/gf_backtrace.f:14 5696 calls to backtrace() Could not print backtrace: mmap: Cannot allocate memory #0 0xf7633273 #1 0xf7633289 #2 0x80487bd #3 0x804871a #4 0x80486f2 #5 0x80486ca #6 0x80486a2 #7 0x8048802 #8 0x8048855 #9 0xf73c0672 #10 0x80485a0 [fun5 ( 46)] 5697 calls to backtrace() [...] System: OpenSUSE 42.3, x86_64, kernel 4.4.114. Test program is attached, compile with : gfortran -m32 -o bug-report-backtrace -g -Wall -Wextra -std=gnu bug-report-backtrace.f Thanks