dmd 1.048 and 2.033 releases
MIURA Masahiro
echochamber at gmail.com
Mon Oct 5 22:58:18 PDT 2009
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.
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