http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51447
Jack Howarth <howarth at nitro dot med.uc.edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |howarth at nitro dot
| |med.uc.edu
--- Comment #16 from Jack Howarth <howarth at nitro dot med.uc.edu> 2013-01-20
22:18:04 UTC ---
The test case gcc.c-torture/execute/pr51447.c fails its execution test at -m32
(but not -m64) on x86_64-apple-darwin12 in gcc trunk. Adding -fno-PIC to the
compile flags eliminates the execution failure at all optimization levels for
-m32 on x86_64-apple-darwin12.
# gdb ./pr51447.x0
GNU gdb 6.3.50-20050815 (Apple version gdb-1822) (Sun Aug 5 03:00:42 UTC 2012)
Copyright 2004 Free Software Foundation, Inc.
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welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
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This GDB was configured as "x86_64-apple-darwin"...Reading symbols for shared
libraries ... done
(gdb) b main
Breakpoint 1 at 0x1eed: file
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c,
line 13.
Breakpoint 2 at 0x1ec8: file
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c,
line 18.
warning: Multiple breakpoints were set.
Use the "delete" command to delete unwanted breakpoints.
(gdb) disp/i $pc
(gdb) r
Starting program:
/sw/src/fink.build/gcc48-4.8.0-1000/darwin_objdir/gcc/testsuite/gcc/pr51447.x0
warning: posix_spawn failed, trying execvp, error: 86
Reading symbols for shared libraries ++......................... done
Breakpoint 1, 0x00001eed in main () at
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c:13
13 {
1: x/i $pc 0x1eed <main+9>: call 0x1f3e <__x86.get_pc_thunk.bx>
(gdb) si
0x00001f3e in __x86.get_pc_thunk.bx ()
1: x/i $pc 0x1f3e <__x86.get_pc_thunk.bx>: mov (%esp),%ebx
(gdb)
0x00001f41 in __x86.get_pc_thunk.bx ()
1: x/i $pc 0x1f41 <__x86.get_pc_thunk.bx+3>: ret
(gdb)
0x00001ef2 in main () at
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c:13
13 {
1: x/i $pc 0x1ef2 <main+14>: lea -0x18(%ebp),%eax
(gdb)
0x00001ef5 13 {
1: x/i $pc 0x1ef5 <main+17>: mov %eax,-0x24(%ebp)
(gdb)
0x00001ef8 13 {
1: x/i $pc 0x1ef8 <main+20>: mov %esp,-0x20(%ebp)
(gdb)
21 bar (&&nonlocal_lab);
1: x/i $pc 0x1efb <main+23>: lea -0x24(%ebp),%eax
(gdb)
0x00001efe 21 bar (&&nonlocal_lab);
1: x/i $pc 0x1efe <main+26>: lea 0x26(%ebx),%edx
(gdb)
0x00001f04 21 bar (&&nonlocal_lab);
1: x/i $pc 0x1f04 <main+32>: mov %edx,(%esp)
(gdb)
0x00001f07 21 bar (&&nonlocal_lab);
1: x/i $pc 0x1f07 <main+35>: mov %eax,%ecx
(gdb)
0x00001f09 21 bar (&&nonlocal_lab);
1: x/i $pc 0x1f09 <main+37>: call 0x1ebd <bar>
(gdb)
bar (func=0x1f18) at
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c:17
17 {
1: x/i $pc 0x1ebd <bar>: push %ebp
(gdb)
0x00001ebe 17 {
1: x/i $pc 0x1ebe <bar+1>: mov %esp,%ebp
(gdb)
0x00001ec0 17 {
1: x/i $pc 0x1ec0 <bar+3>: push %ebx
(gdb)
0x00001ec1 17 {
1: x/i $pc 0x1ec1 <bar+4>: call 0x1f3e <__x86.get_pc_thunk.bx>
(gdb)
0x00001f3e in __x86.get_pc_thunk.bx ()
1: x/i $pc 0x1f3e <__x86.get_pc_thunk.bx>: mov (%esp),%ebx
(gdb)
0x00001f41 in __x86.get_pc_thunk.bx ()
1: x/i $pc 0x1f41 <__x86.get_pc_thunk.bx+3>: ret
(gdb)
0x00001ec6 in bar (func=0x1f18) at
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c:17
17 {
1: x/i $pc 0x1ec6 <bar+9>: mov %ecx,%edx
(gdb)
Breakpoint 2, bar (func=0x1f18) at
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c:18
18 ptr = func;
1: x/i $pc 0x1ec8 <bar+11>: lea 0x142(%ebx),%eax
(gdb)
0x00001ece 18 ptr = func;
1: x/i $pc 0x1ece <bar+17>: mov (%eax),%eax
(gdb)
0x00001ed0 18 ptr = func;
1: x/i $pc 0x1ed0 <bar+19>: mov 0x8(%ebp),%ecx
(gdb)
0x00001ed3 18 ptr = func;
1: x/i $pc 0x1ed3 <bar+22>: mov %ecx,(%eax)
(gdb)
19 goto nonlocal_lab;
1: x/i $pc 0x1ed5 <bar+24>: mov %edx,%eax
(gdb)
0x00001ed7 19 goto nonlocal_lab;
1: x/i $pc 0x1ed7 <bar+26>: lea 0x4f(%ebx),%edx
(gdb)
0x00001edd 19 goto nonlocal_lab;
1: x/i $pc 0x1edd <bar+32>: mov (%eax),%ebp
(gdb)
0x00001edf in bar (func=0xbffff8e0) at
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c:19
19 goto nonlocal_lab;
1: x/i $pc 0x1edf <bar+34>: mov 0x4(%eax),%esp
(gdb)
0x00001ee2 19 goto nonlocal_lab;
1: x/i $pc 0x1ee2 <bar+37>: jmp *%edx
(gdb)
0x00001f15 in main () at
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c:22
22 return 1;
1: x/i $pc 0x1f15 <main+49>: lea 0x18(%ebp),%ebp
(gdb)
main () at
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c:24
24 if (ptr != &&nonlocal_lab)
1: x/i $pc 0x1f18 <main+52>: lea 0x116(%ebx),%eax
(gdb)
0x00001f1e 24 if (ptr != &&nonlocal_lab)
1: x/i $pc 0x1f1e <main+58>: mov (%eax),%eax
(gdb)
0x00001f20 24 if (ptr != &&nonlocal_lab)
1: x/i $pc 0x1f20 <main+60>: mov (%eax),%edx
(gdb)
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0104c700
0x00001f20 in main () at
/sw/src/fink.build/gcc48-4.8.0-1000/gcc-4.8-20130120/gcc/testsuite/gcc.c-torture/execute/pr51447.c:24
24 if (ptr != &&nonlocal_lab)
