Jason House wrote: > The standard gdb 6.8 can show > backtraces but can't list code, even if the code is linked in libraries from > C++.
Can gdb *always* list code for you? For me, it sometimes does, sometimes doesn't. ---- cut here ---- % cat -n foo.d 1 import std.stdio; 2 3 void main() 4 { 5 *(cast(ubyte*)0) = 0; // intentional SEGV 6 // writefln("hello"); 7 } % dmd -gc foo.d; /usr/bin/gdb --quiet ./foo (gdb) run Starting program: /home/miura/work/foo [Thread debugging using libthread_db enabled] [New Thread 0xb7dde6f0 (LWP 12300)] Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0xb7dde6f0 (LWP 12300)] 0x08049239 in _Dmain () at foo.d:5 5 *(cast(ubyte*)0) = 0; // intentional SEGV (gdb) list 1 import std.stdio; 2 3 void main() 4 { 5 *(cast(ubyte*)0) = 0; // intentional SEGV 6 // writefln("hello"); 7 } (gdb) backtrace #0 0x08049239 in _Dmain () at foo.d:5 #1 0x08049514 in _D2rt6dmain24mainUiPPaZi7runMainMFZv () #2 0x0804931d in _D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv () #3 0x08049556 in _D2rt6dmain24mainUiPPaZi6runAllMFZv () #4 0x0804931d in _D2rt6dmain24mainUiPPaZi7tryExecMFMDFZvZv () #5 0x080492c8 in main () (gdb) ---- cut here ---- Uncomment the line 6, and gdb is now unable to list code: ---- cut here ---- % dmd -gc foo.d; /usr/bin/gdb --quiet ./foo (gdb) run Starting program: /home/miura/work/foo [Thread debugging using libthread_db enabled] [New Thread 0xb7d696f0 (LWP 12311)] Dwarf Error: Cannot find DIE at 0x846 referenced from DIE at 0x165 [in module /home/miura/work/foo] (gdb) list 1 // Written in the D programming language. 2 3 /** 4 Standard I/O functions that extend $(B std.c.stdio). $(B std.c.stdio) 5 is $(D_PARAM public)ally imported when importing $(B std.stdio). 6 7 Macros: 8 WIKI=Phobos/StdStdio 9 10 Copyright: Copyright Digital Mars 2007 - 2009. Dwarf Error: Cannot find DIE at 0x846 referenced from DIE at 0x165 [in module /home/miura/work/foo] (gdb) backtrace Dwarf Error: Cannot find DIE at 0x846 referenced from DIE at 0x165 [in module /home/miura/work/foo] Dwarf Error: Cannot find DIE at 0x846 referenced from DIE at 0x165 [in module /home/miura/work/foo] (gdb) ---- cut here ---- That's Kubuntu 32bit 9.04, gdb 6.8, and DMD 2.033.