http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51124
--- Comment #2 from Jack Howarth <howarth at nitro dot med.uc.edu> 2011-12-16 15:19:55 UTC --- On x86_64-apple-darwin11, the failure of... FAIL: libitm.c/clone-1.c execution test at -m32/-m64 appears to be due to the -pie linker default when targeting darwin11. If I append -Wl,-no_pie to the compilation of the clone-1.exe testcase, the resulting binaries for both -m32 and -m64 execute fine. For... /sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/gcc/xgcc -B/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/gcc/ /sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20111215/libitm/testsuite/libitm.c/clone-1.c -B/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.2.0/./libitm/ -I/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.2.0/./libitm -I/sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20111215/libitm/testsuite/.. -shared-libgcc -fmessage-length=0 -fgnu-tm -O2 -L/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.2.0/./libitm/.libs -litm -lm -m64 -o ./clone-1.exe the failing PIE executable debugs in gdb (with aslr enabled) as... gdb ./clone-1.exeGNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Thu Nov 3 21:59:02 UTC 2011)Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "x86_64-apple-darwin"...Reading symbols for shared libraries .... done (gdb) set disable-aslr 0 (gdb) r Starting program: /sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/x86_64-apple-darwin11.2.0/libitm/testsuite/clone-1.exe Reading symbols for shared libraries + done Reading symbols for shared libraries ++++........................ done Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x00000001000010a8 clone_entry_compare (a=0x100001098, b=0x1000010a8) at ../../../gcc-4.7-20111215/libitm/clone.cc:105 105 if (aa->orig < bb->orig) (gdb) bt #0 clone_entry_compare (a=0x100001098, b=0x1000010a8) at ../../../gcc-4.7-20111215/libitm/clone.cc:105 #1 0x00007fff8ddd4894 in _qsort () #2 0x0000000104e388e6 in _ITM_registerTMCloneTable (xent=0x100001098, size=2) at ../../../gcc-4.7-20111215/libitm/clone.cc:155 Current language: auto; currently c++ (gdb) The remaining failures at -m64-only of... FAIL: libitm.c/memcpy-1.c execution test FAIL: libitm.c/memset-1.c execution test are not solved with -Wl,-no_pie and the binaries fail with the output... libitm: pr_undoLogCode not supported
