Bug 893 – The profile flag no longer seems to work on Linux x86 64

The -profile flag no longer works for me. I am compiling under 64 bit linux on a dual core machine (the binaries are 32 bit of course). This is broken on 1.0 and 1.003 at least. If I look at it in gdb, I see this as the crash point. 0x0804a365 in _D6object6Object5opCmpMFC6ObjectZi () The insns at this point (I replace the mangled name from each line with "function" to make it easier to read, look for the line marked with <<<. Dump of assembler code for function _D6object6Object5opCmpMFC6ObjectZi: 0x0804a344 <function+0>: push %ebp 0x0804a345 <function+1>: mov %esp,%ebp 0x0804a347 <function+3>: sub $0xc,%esp 0x0804a34a <function+6>: push %ebx 0x0804a34b <function+7>: push %esi 0x0804a34c <function+8>: mov %eax,0xfffffff8(%ebp) 0x0804a34f <function+11>: mov $0x805e790,%ecx 0x0804a354 <function+16>: push %ecx 0x0804a355 <function+17>: call 0x80555e8 <_d_newclass> 0x0804a35a <function+22>: add $0x4,%esp 0x0804a35d <function+25>: mov %eax,0xfffffffc(%ebp) 0x0804a360 <function+28>: push $0x1 0x0804a362 <function+30>: mov 0xfffffff8(%ebp),%edx 0x0804a365 <function+33>: <<< mov (%edx),%ebx 0x0804a367 <function+35>: mov (%ebx),%esi 0x0804a369 <function+37>: pushl 0x14(%esi) 0x0804a36c <function+40>: pushl 0x10(%esi) 0x0804a36f <function+43>: pushl 0x805afd6 0x0804a375 <function+49>: pushl 0x805afd2 0x0804a37b <function+55>: call 0x80561c4 <_d_arraycat> 0x0804a380 <function+60>: add $0x14,%esp 0x0804a383 <function+63>: push %edx 0x0804a384 <function+64>: push %eax 0x0804a385 <function+65>: mov 0xfffffffc(%ebp),%eax 0x0804a388 <function+68>: call 0x804b404 <_D6object5Error5_ctorMFAaZC6object5Error> 0x0804a38d <function+73>: push %eax 0x0804a38e <function+74>: call 0x8057f5c <_d_throw@4> 0x0804a393 <function+79>: pop %esi 0x0804a394 <function+80>: pop %ebx 0x0804a395 <function+81>: mov %ebp,%esp 0x0804a397 <function+83>: pop %ebp 0x0804a398 <function+84>: ret $0x4 0x0804a39b <function+87>: nop End of assembler dump. (gdb) info reg eax 0x556e4fe0 1433292768 ecx 0x0 0 edx 0x18 24 ebx 0x1 1 esp 0xffffd0fc 0xffffd0fc ebp 0xffffd114 0xffffd114 esi 0x1 1 edi 0x1 1 eip 0x804a365 0x804a365 <_D6object6Object5opCmpMFC6ObjectZi+33> eflags 0x10296 66198 cs 0x23 35 ss 0x2b 43 ds 0x2b 43 es 0x2b 43 fs 0x0 0 gs 0x63 99 Just for completeness: //hello.d import std.stdio; int main(char[][] x) { writefln("hello."); return 0; } $ dmd -ofhello hello.d $ ./hello hello. $ dmd -ofhello hello.d -profile $ ./hello Segmentation fault

I could reproduce this on a Turion64 X2 (x86_64 dual core), running completely in 32 Bit mode. Interestingly the segfault occures in main (not _Dmain) when you have just an empty main function: $ cat proftst.d void main() { } $ dmd ./proftst.d gcc proftst.o -o proftst -m32 -lphobos -lpthread -lm $ ./proftst $ $ dmd -profile ./proftst.d gcc proftst.o -o proftst -m32 -lphobos -lpthread -lm $ ./proftst Segmentation fault $ With GDB: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1210202432 (LWP 3357)] 0x0804a333 in main () (gdb) info reg eax 0x9 9 ecx 0x1 1 edx 0xfefeff00 -16843008 ebx 0x1 1 esp 0xbfa48ba8 0xbfa48ba8 ebp 0xbfa48ba8 0xbfa48ba8 esi 0x1 1 edi 0x1 1 eip 0x804a333 0x804a333 <main+87> eflags 0x10216 [ PF AF IF RF ] cs 0x73 115 ss 0x7b 123 ds 0x7b 123 es 0x7b 123 fs 0x0 0 gs 0x33 51 (gdb) Critical row is marked below with ">>>": Disassembly of section .gnu.linkonce.tmain: 0804a2dc <main>: 804a2dc: 55 push %ebp 804a2dd: 8b ec mov %esp,%ebp 804a2df: 83 ec 14 sub $0x14,%esp 804a2e2: 53 push %ebx 804a2e3: 56 push %esi 804a2e4: 57 push %edi 804a2e5: 8b 7d 08 mov 0x8(%ebp),%edi 804a2e8: 8b 5d 0c mov 0xc(%ebp),%ebx 804a2eb: c7 45 f4 00 00 00 00 movl $0x0,0xfffffff4(%ebp) 804a2f2: e8 dd fb ff ff call 8049ed4 <_STI_monitor_staticctor> 804a2f7: e8 3c fb ff ff call 8049e38 <_STI_critical_init> 804a2fc: e8 53 95 00 00 call 8053854 <gc_init> 804a301: 8b cf mov %edi,%ecx 804a303: c1 e1 03 shl $0x3,%ecx 804a306: 51 push %ecx 804a307: e8 28 f3 ff ff call 8049634 <malloc@plt> 804a30c: 89 45 f0 mov %eax,0xfffffff0(%ebp) 804a30f: 83 c4 04 add $0x4,%esp 804a312: 80 3d 40 1e 06 08 00 cmpb $0x0,0x8061e40 804a319: 74 4b je 804a366 <main+0x8a> 804a31b: e8 0c 01 00 00 call 804a42c <_moduleCtor> 804a320: e8 cf 02 00 00 call 804a5f4 <_moduleUnitTests> 804a325: 31 f6 xor %esi,%esi 804a327: 85 ff test %edi,%edi 804a329: 7e 1d jle 804a348 <main+0x6c> 804a32b: ff 34 b3 pushl (%ebx,%esi,4) 804a32e: e8 11 f4 ff ff call 8049744 <strlen@plt> 804a333: >>> 8b 14 b3 mov (%ebx,%esi,4),%edx 804a336: 8b 4d f0 mov 0xfffffff0(%ebp),%ecx 804a339: 89 04 f1 mov %eax,(%ecx,%esi,8) 804a33c: 89 54 f1 04 mov %edx,0x4(%ecx,%esi,8) 804a340: 46 inc %esi 804a341: 83 c4 04 add $0x4,%esp 804a344: 39 fe cmp %edi,%esi 804a346: 7c e3 jl 804a32b <main+0x4f>

Fixed DMD 1.005