You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
108 lines
3.1 KiB
108 lines
3.1 KiB
/* simple.c -- The backtrace_simple function. |
|
Copyright (C) 2012-2021 Free Software Foundation, Inc. |
|
Written by Ian Lance Taylor, Google. |
|
|
|
Redistribution and use in source and binary forms, with or without |
|
modification, are permitted provided that the following conditions are |
|
met: |
|
|
|
(1) Redistributions of source code must retain the above copyright |
|
notice, this list of conditions and the following disclaimer. |
|
|
|
(2) Redistributions in binary form must reproduce the above copyright |
|
notice, this list of conditions and the following disclaimer in |
|
the documentation and/or other materials provided with the |
|
distribution. |
|
|
|
(3) The name of the author may not be used to |
|
endorse or promote products derived from this software without |
|
specific prior written permission. |
|
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
|
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
|
DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
|
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
|
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
|
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
|
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
|
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
|
POSSIBILITY OF SUCH DAMAGE. */ |
|
|
|
#include "config.h" |
|
|
|
#include "unwind.h" |
|
#include "backtrace.h" |
|
|
|
/* The simple_backtrace routine. */ |
|
|
|
/* Data passed through _Unwind_Backtrace. */ |
|
|
|
struct backtrace_simple_data |
|
{ |
|
/* Number of frames to skip. */ |
|
int skip; |
|
/* Library state. */ |
|
struct backtrace_state *state; |
|
/* Callback routine. */ |
|
backtrace_simple_callback callback; |
|
/* Error callback routine. */ |
|
backtrace_error_callback error_callback; |
|
/* Data to pass to callback routine. */ |
|
void *data; |
|
/* Value to return from backtrace. */ |
|
int ret; |
|
}; |
|
|
|
/* Unwind library callback routine. This is passed to |
|
_Unwind_Backtrace. */ |
|
|
|
static _Unwind_Reason_Code |
|
simple_unwind (struct _Unwind_Context *context, void *vdata) |
|
{ |
|
struct backtrace_simple_data *bdata = (struct backtrace_simple_data *) vdata; |
|
uintptr_t pc; |
|
int ip_before_insn = 0; |
|
|
|
#ifdef HAVE_GETIPINFO |
|
pc = _Unwind_GetIPInfo (context, &ip_before_insn); |
|
#else |
|
pc = _Unwind_GetIP (context); |
|
#endif |
|
|
|
if (bdata->skip > 0) |
|
{ |
|
--bdata->skip; |
|
return _URC_NO_REASON; |
|
} |
|
|
|
if (!ip_before_insn) |
|
--pc; |
|
|
|
bdata->ret = bdata->callback (bdata->data, pc); |
|
|
|
if (bdata->ret != 0) |
|
return _URC_END_OF_STACK; |
|
|
|
return _URC_NO_REASON; |
|
} |
|
|
|
/* Get a simple stack backtrace. */ |
|
|
|
int __attribute__((noinline)) |
|
backtrace_simple (struct backtrace_state *state, int skip, |
|
backtrace_simple_callback callback, |
|
backtrace_error_callback error_callback, void *data) |
|
{ |
|
struct backtrace_simple_data bdata; |
|
|
|
bdata.skip = skip + 1; |
|
bdata.state = state; |
|
bdata.callback = callback; |
|
bdata.error_callback = error_callback; |
|
bdata.data = data; |
|
bdata.ret = 0; |
|
_Unwind_Backtrace (simple_unwind, &bdata); |
|
return bdata.ret; |
|
}
|
|
|