mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/* Return backtrace of current program state.
|
|
Copyright (C) 2003-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <execinfo.h>
|
|
#include <stdlib.h>
|
|
#include <unwind.h>
|
|
#include <unwind-link.h>
|
|
|
|
struct trace_arg
|
|
{
|
|
void **array;
|
|
struct unwind_link *unwind_link;
|
|
_Unwind_Word cfa;
|
|
int cnt;
|
|
int size;
|
|
};
|
|
|
|
static _Unwind_Reason_Code
|
|
backtrace_helper (struct _Unwind_Context *ctx, void *a)
|
|
{
|
|
struct trace_arg *arg = a;
|
|
|
|
/* We are first called with address in the __backtrace function.
|
|
Skip it. */
|
|
if (arg->cnt != -1)
|
|
{
|
|
arg->array[arg->cnt]
|
|
= (void *) UNWIND_LINK_PTR (arg->unwind_link, _Unwind_GetIP) (ctx);
|
|
if (arg->cnt > 0)
|
|
arg->array[arg->cnt]
|
|
= unwind_arch_adjustment (arg->array[arg->cnt - 1],
|
|
arg->array[arg->cnt]);
|
|
|
|
/* Check whether we make any progress. */
|
|
_Unwind_Word cfa
|
|
= UNWIND_LINK_PTR (arg->unwind_link, _Unwind_GetCFA) (ctx);
|
|
|
|
if (arg->cnt > 0 && arg->array[arg->cnt - 1] == arg->array[arg->cnt]
|
|
&& cfa == arg->cfa)
|
|
return _URC_END_OF_STACK;
|
|
arg->cfa = cfa;
|
|
}
|
|
if (++arg->cnt == arg->size)
|
|
return _URC_END_OF_STACK;
|
|
return _URC_NO_REASON;
|
|
}
|
|
|
|
int
|
|
__backtrace (void **array, int size)
|
|
{
|
|
struct trace_arg arg =
|
|
{
|
|
.array = array,
|
|
.unwind_link = __libc_unwind_link_get (),
|
|
.cfa = 0,
|
|
.size = size,
|
|
.cnt = -1
|
|
};
|
|
|
|
if (size <= 0 || arg.unwind_link == NULL)
|
|
return 0;
|
|
|
|
UNWIND_LINK_PTR (arg.unwind_link, _Unwind_Backtrace)
|
|
(backtrace_helper, &arg);
|
|
|
|
/* _Unwind_Backtrace seems to put NULL address above
|
|
_start. Fix it up here. */
|
|
if (arg.cnt > 1 && arg.array[arg.cnt - 1] == NULL)
|
|
--arg.cnt;
|
|
return arg.cnt != -1 ? arg.cnt : 0;
|
|
}
|
|
weak_alias (__backtrace, backtrace)
|
|
libc_hidden_def (__backtrace)
|