https://sourceware.org/bugzilla/show_bug.cgi?id=19435
Bug ID: 19435
Summary: objdump receives SIGABRT when disassembling Mach O
binary on OS X
Product: binutils
Version: 2.25
Status: NEW
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: iankronquist at gmail dot com
Target Milestone: ---
Created attachment 8887
--> https://sourceware.org/bugzilla/attachment.cgi?id=8887&action=edit
C Source code which can cause objdump to fail
On OS X 10.11, given certain Mach-O x86_64 binaries compiled with the '-g' flag
objdump vversion 2.25 receives SIGABRT when attempting to free a pointer which
was never allocated. It should at least fail gracefully, but preferably should
not fail at all.
Steps to reproduce:
Given the attached C source file, compile it with the '-g' flag with GCC 5.3.0
or clang Apple LLVM version 7.0.0 (clang-700.1.76).
$ gcc -g out.c
OR
$ clang -g out.c
Now run disassemble the resulting binary with the '-S' flag to mix in source
code with the binary:
$ objdump -S a.out
./a.out: file format mach-o-x86-64
Disassembly of section .text:
... many correct assembly instructions ...
gobjdump(13297,0x7fff791b1000) malloc: *** error for object 0x101203e00:
pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
Abort trap: 6
For your convenience, a binary which causes these problems is attached.
I would be willing to do further investigation into this, and, if I am not too
busy and this looks relatively approachable, work on providing a patch.
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