[Bug c/24724] New: _Unwind_Backtrace() calls malloc

[arun dot sharma at google dot com]

As this stacktrace shows:

#3  0x00000000004044e2 in malloc (size=36024) at tcmalloc.cc:1314
#4  0x000000000047a938 in search_object ()
#5  0x000000000047b189 in _Unwind_Find_FDE ()
#6  0x0000000000478049 in uw_frame_state_for ()
#7  0x0000000000478eca in uw_init_context_1 ()
#8  0x00000000004790b0 in _Unwind_Backtrace ()

there are code paths from _Unwind_Backtrace to malloc. This makes the unwinder
deadlock prone when called from applications that have their own customized
malloc.


-- 
           Summary: _Unwind_Backtrace() calls malloc
           Product: gcc
           Version: 4.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: arun dot sharma at google dot com
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24724