http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49906
Summary: wrong .debug_line for -O0 -g prologue skip
Product: gcc
Version: 4.4.7
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: jan.kratoch...@redhat.com
Target: x86_64-unknown-linux-gnu
FAIL: gcc (GCC) 4.4.7 20110729 (prerelease)
FAIL: gcc (GCC) 4.5.4 20110729 (prerelease)
FAIL: gcc (GCC) 4.6.2 20110729 (prerelease)
FAIL: gcc (GCC) 4.7.0 20110728 (experimental)
-g
-------------------------------------------------------------------------------
static int i;
static void
f (void)
{
for (;;)
if (i++)
break;
}
int main (void) { f (); return 0; }
-------------------------------------------------------------------------------
(gdb) break f
Breakpoint 1 at 0x40045a: file src12932.c, line 8.
(gdb) run
Breakpoint 1, f () at src12932.c:8
8 }
(gdb) print i
Actual:
$1 = 1
Expected:
$1 = 0
-------------------------------------------------------------------------------
Original GDB bugreport:
http://sourceware.org/bugzilla/show_bug.cgi?id=12932
-------------------------------------------------------------------------------
Line Number Statements:
Extended opcode 2: set Address to 0x400454
Special opcode 8: advance Address by 0 to 0x400454 and Line by 3 to 4
Special opcode 93: advance Address by 6 to 0x40045a and Line by 4 to 8
Special opcode 17: advance Address by 1 to 0x40045b and Line by -2 to 6
-------------------------------------------------------------------------------
0000000000400454 <f>:
f():
/home/jkratoch/t/src12932.c:4
400454: 55 push %rbp
400455: 48 89 e5 mov %rsp,%rbp
400458: eb 01 jmp 40045b <f+0x7>
/home/jkratoch/t/src12932.c:8
40045a: 90 nop
/home/jkratoch/t/src12932.c:6
40045b: 8b 05 17 04 20 00 mov 0x200417(%rip),%eax #
600878 <i>
400461: 85 c0 test %eax,%eax
400463: 0f 95 c2 setne %dl
400466: 83 c0 01 add $0x1,%eax
400469: 89 05 09 04 20 00 mov %eax,0x200409(%rip) #
600878 <i>
40046f: 84 d2 test %dl,%dl
400471: 74 e7 je 40045a <f+0x6>
/home/jkratoch/t/src12932.c:7
400473: 90 nop
/home/jkratoch/t/src12932.c:8
400474: 5d pop %rbp
400475: c3 retq
