Package: gdb
Version: 7.0-1
Severity: normal
Thanks for packaging gdb 7.0.
I've tested the process record/replay feature on amd64, it mostly works,
except for memset:
gdb: record error in memset: Process record doesn't support instruction 0xf6e
To reproduce:
$ cat >foo.c <<EOF
#include <string.h>
int main()
{
char foo[256*1024];
memset(foo, 0x5a, sizeof(foo));
return 0;
}
EOF
$ gcc foo.c -g
$ gdb ./a.out
...
(gdb) b main
(gdb) r
Starting program: /home/edwin/a.out
Breakpoint 1, main () at x.c:5
5 memset(foo, 0x5a, sizeof(foo));
(gdb) record
(gdb) c
Continuing.
Process record doesn't support instruction 0xf6e at address 0x341127b422.
Process record: failed to record execution log.
Program received signal SIGTRAP, Trace/breakpoint trap.
memset () at ../sysdeps/x86_64/memset.S:746
746 ../sysdeps/x86_64/memset.S: No such file or directory.
in ../sysdeps/x86_64/memset.S
Current language: auto
The current source language is "auto; currently asm".
This is a disassembly around 0x341127b422, note that 0x341127b422 is not
the beginning of an instruction:
0x000000341127b419 <memset+1369>: lea (%rcx,%r11,1),%r11
0x000000341127b41d <memset+1373>: jmpq *%r11
0x000000341127b420 <memset+1376>: movq %rdx,%xmm0
0x000000341127b425 <memset+1381>: punpcklqdq %xmm0,%xmm0
If I compile the program with -m32, then memset works, so it looks like
something wrong with handling of SSE instructions.
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (990, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.31.3 (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages gdb depends on:
ii libc6 2.9-27 GNU C Library: Shared libraries
ii libexpat1 2.0.1-4 XML parsing C library - runtime li
ii libncurses5 5.7+20090803-2 shared libraries for terminal hand
ii libreadline6 6.0-5 GNU readline and history libraries
ii python2.5 2.5.4-2 An interactive high-level object-o
ii zlib1g 1:1.2.3.3.dfsg-15 compression library - runtime
gdb recommends no packages.
Versions of packages gdb suggests:
ii gdb-doc 6.8.50.20090628-1 The GNU Debugger Documentation
-- no debconf information
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