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Re: [PATCH RFA] utils.c: Fix xcalloc (0, 0) behavior
- To: gdb-patches at sources dot redhat dot com
- Subject: Re: [PATCH RFA] utils.c: Fix xcalloc (0, 0) behavior
- From: Kevin Buettner <kevinb at cygnus dot com>
- Date: Sat, 3 Mar 2001 01:02:01 -0700
- References: <1010303075808.ZM24102@ocotillo.lan>
On Mar 3, 12:58am, Kevin Buettner wrote:
> Unfortunately, our implementation of xcalloc() and xmrealloc() choose
> to treat the NULL return value as an error condition and call nomem()
> as a result.
It just occurred to me that someone reviewing this patch may want
to know which xcalloc() call in gdb was responsible for generating
a zero-sized request. See below for the backtrace...
Breakpoint 3, nomem (size=0) at /saguaro1/sourceware-ia64/src/gdb/utils.c:1005
1005 if (size > 0)
(top-gdb) bt 8
#0 nomem (size=0) at /saguaro1/sourceware-ia64/src/gdb/utils.c:1005
During symbol reading, type qualifier 'const' ignored.
#1 0x20000100f0162380 in xcalloc (number=0, size=8)
at /saguaro1/sourceware-ia64/src/gdb/utils.c:1076
#2 0x20000100f00f6760 in alloc_gdbarch_data (gdbarch=0x10000024f18)
at /saguaro1/sourceware-ia64/src/gdb/gdbarch.c:4229
#3 0x20000100f00eb8d0 in gdbarch_alloc (info=0x3fefffff3d7c0,
tdep=0x10000024eb0) at /saguaro1/sourceware-ia64/src/gdb/gdbarch.c:393
#4 0x20000100f01a4ee0 in ia64_gdbarch_init (info={
bfd_architecture = bfd_arch_ia64, bfd_arch_info = 0x300341fb8,
byte_order = 1234, abfd = 0x0, tdep_info = 0x0}, arches=0x0)
at /saguaro1/sourceware-ia64/src/gdb/ia64-tdep.c:1971
#5 0x20000100f00f7aa0 in gdbarch_update_p (info={
bfd_architecture = bfd_arch_ia64, bfd_arch_info = 0x300341fb8,
byte_order = 1234, abfd = 0x0, tdep_info = 0x0})
at /saguaro1/sourceware-ia64/src/gdb/gdbarch.c:4579
#6 0x20000100f00f90a0 in initialize_current_architecture ()
at /saguaro1/sourceware-ia64/src/gdb/arch-utils.c:685
During symbol reading, type qualifier 'volatile' ignored.
#7 0x20000100f015b070 in gdb_init (
argv0=0x3fefffffff880 "/home/kev/sourceware-ia64-bld/gdb/gdb")
at /saguaro1/sourceware-ia64/src/gdb/top.c:685