[Bug malloc/15160] New: memusagestat crashes with FPE with programs that don't use malloc

[Bug malloc/15160] New: memusagestat crashes with FPE with programs that don't use malloc

[siddhesh at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15160

             Bug #: 15160
           Summary: memusagestat crashes with FPE with programs that don't
                    use malloc
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: malloc
        AssignedTo: siddhesh@redhat.com
        ReportedBy: siddhesh@redhat.com
    Classification: Unclassified


For programs that don't use malloc, memusage generates statistics with 0
maxheap_size, which results in a divide-by-zero FPE when it tries to generate
the graph image.

Steps to reproduce:

$ cat > foo.c
#include <stdio.h>

int main (int argc, char **argv)
{
  int i;

  for (i = 0; i < 10000; i++)
    puts (argv[0]);
  return 0;
}
^D

$ gcc foo.c

$ LD_PRELOAD=/glibc-build/malloc/libmemusage.so \
MEMUSAGE_OUTPUT=/tmp/memusage.TSY4YO ./a.out

/glibc-build/malloc/memusagestat /tmp/memusage.TSY4YO x.png

Actual Result:

Floating point exception

Expected Result:

Graph showing 0 utilization for dynamic memory allocation and actual stack
utilization.

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[Bug malloc/15160] memusagestat crashes with FPE with programs that don't use malloc

[siddhesh at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15160

Siddhesh Poyarekar <siddhesh at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED

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[Bug malloc/15160] memusagestat crashes with FPE with programs that don't use malloc

[siddhesh at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15160

Siddhesh Poyarekar <siddhesh at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #1 from Siddhesh Poyarekar <siddhesh at redhat dot com> 2013-02-26 08:56:56 UTC ---
Fixed in master:

http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=7da6d9ed266105e0ebefd01a4b6bf08bf56257c3

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[Bug malloc/15160] memusagestat crashes with FPE with programs that don't use malloc

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=15160

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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