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Consider the following trivially simple program :
PROGRAM p IMPLICIT NONE !.. Local variables CHARACTER(LEN=2) :: StrBuffer INTEGER :: I I = 1 WRITE(StrBuffer, FMT='(I2)') I !.. STOP END PROGRAM p
When the code is compiled with Intel Fortran (version 14 or 2015 Beta) and the program is executed, Dr Memory utility indicates there is a memory leak associated with the WRITE statement. The output generated by the utility is as follows:
Dr. Memory version 1.7.0 Running "Debug\TestFor32.exe" Error #1: LEAK 12 bytes replace_malloc d:\drmemory_package\common\alloc_replace.c(2320): for__get_vm ??:0 for__acquire_lun ??:0 for_write_int_fmt ??:0 P TestFor.f90(10): main ??:0 ERRORS FOUND: 0 unique, 0 total unaddressable access(es) 0 unique, 0 total uninitialized access(es) 0 unique, 0 total invalid heap argument(s) 0 unique, 0 total GDI usage error(s) 0 unique, 0 total handle leak(s) 0 unique, 0 total warning(s) 1 unique, 1 total, 12 byte(s) of leak(s) 0 unique, 0 total, 0 byte(s) of possible leak(s) Details: C:\..\DrMemory-TestFor32.exe.4680.000\results.txt
Can someone at Intel please investigate and provide feedback on this memory leak? In one of my codes, such a WRITE operation on an internal file can occur many times and there are some performance issues with this code, hence I appreciate any clarification any one can provide.
Thanks,
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FWIW, when the above example is compiled and executed with gfortran 4.9, one gets the following:
Dr. Memory version 1.7.0 build 5 built on Apr 4 2014 23:38:05 Dr. Memory results for pid 1652: "TestFor.exe" Application cmdline: "Debug\GNU\TestFor.exe -show_reachable" =========================================================================== FINAL SUMMARY: DUPLICATE ERROR COUNTS: SUPPRESSIONS USED: NO ERRORS FOUND: 0 unique, 0 total unaddressable access(es) 0 unique, 0 total uninitialized access(es) 0 unique, 0 total invalid heap argument(s) 0 unique, 0 total GDI usage error(s) 0 unique, 0 total handle leak(s) 0 unique, 0 total warning(s) 0 unique, 0 total, 0 byte(s) of leak(s) 0 unique, 0 total, 0 byte(s) of possible leak(s) Details: C:\..\DrMemory-TestFor.exe.1652.000\results.txt
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Yep, we know about this one and recently fixed it. The fix should be in the final 15.0 release.
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Steve Lionel (Intel) wrote:
Yep, we know about this one and recently fixed it. The fix should be in the final 15.0 release.
Excellent, thanks!
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