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Re: 64-bit gdb: invalid decimal " 0x22DBF0"

On 27/07/2013 6:30 AM, Daniel Brown wrote:
I have also ran into this problem, in my case though I have managed to reduce the issue down to an fgets call when reading a pipe.
The following code causes the issue for me if I try and debug it:
<STC snipped>

That STC let me get a stack trace of gdb:
#0  write (fd=2, ptr=ptr@entry=0x600298c70, len=len@entry=27)
    at /usr/src/debug/cygwin-1.7.22-1/winsup/cygwin/
#1  0x00000001801aef93 in _write_r (ptr=ptr@entry=0xc2d440,
    fd=<optimized out>, buf=buf@entry=0x600298c70, cnt=cnt@entry=27)
    at /usr/src/debug/cygwin-1.7.22-1/newlib/libc/reent/writer.c:58
#2  0x000000018019c2bf in __swrite64 (ptr=0xc2d440,
    cookie=0x1801cb608 <reent_data+1704>,
    buf=0x600298c70 "invalid decimal \" 0x22DBF0\"", n=27)
    at /usr/src/debug/cygwin-1.7.22-1/newlib/libc/stdio64/stdio64.c:71
#3  0x000000018019bc00 in __sfvwrite_r (ptr=ptr@entry=0xc2d440,
    fp=fp@entry=0x1801cb608 <reent_data+1704>, uio=uio@entry=0xc2a690)
    at /usr/src/debug/cygwin-1.7.22-1/newlib/libc/stdio/fvwrite.c:97
#4  0x00000001801752e4 in _fputs_r (ptr=0xc2d440, s=<optimized out>,
    fp=0x1801cb608 <reent_data+1704>)
    at /usr/src/debug/cygwin-1.7.22-1/newlib/libc/stdio/fputs.c:94
#5  0x00000001801130cb in _sigfe () from /usr/bin/cygwin1.dll
... ten frames of garbage...
#15 0x0000000100513f7a in print_exception (file=0x60017c920, file@entry=0x0, e=...)
    at /usr/src/debug/gdb-7.6-2/gdb/exceptions.c:303
#16 0x00000001005144e4 in exception_print (file=0x0, e=...)
    at /usr/src/debug/gdb-7.6-2/gdb/exceptions.c:333
#17 0x000000010051c8bc in start_event_loop ()
    at /usr/src/debug/gdb-7.6-2/gdb/event-loop.c:435
#18 0x00000001005160c6 in captured_command_loop (data=data@entry=0x0)
    at /usr/src/debug/gdb-7.6-2/gdb/main.c:258
#19 0x000000010051484a in catch_errors (
    func=func@entry=0x1005160b0 <captured_command_loop>,
errstring=errstring@entry=0x100753ea3 <__PRETTY_FUNCTION__.13175+221> "",
    at /usr/src/debug/gdb-7.6-2/gdb/exceptions.c:546
#20 0x0000000100516f7d in captured_main (data=data@entry=0xc2aaa0)
    at /usr/src/debug/gdb-7.6-2/gdb/main.c:1041
#21 0x000000010051484a in catch_errors (
    func=func@entry=0x1005163a0 <captured_main>,
errstring=errstring@entry=0x100753ea3 <__PRETTY_FUNCTION__.13175+221> "",
    at /usr/src/debug/gdb-7.6-2/gdb/exceptions.c:546
#22 0x00000001005174ec in gdb_main (args=args@entry=0xc2aaa0)
    at /usr/src/debug/gdb-7.6-2/gdb/main.c:1050
#23 0x00000001006e0721 in main (argc=2, argv=0xc2ab20)
    at /usr/src/debug/gdb-7.6-2/gdb/gdb.c:34

Maybe that will help?

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