187 lines
8.5 KiB
C++
187 lines
8.5 KiB
C++
|
/* backtrace.h -- Public header file for stack backtrace library.
|
||
|
|
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. */
|
||
|
|
|
||
|
|
#ifndef BACKTRACE_H
|
||
|
|
#define BACKTRACE_H
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
namespace tracy
|
||
|
|
{
|
||
|
|
|
||
|
|
/* The backtrace state. This struct is intentionally not defined in
|
||
|
|
the public interface. */
|
||
|
|
|
||
|
|
struct backtrace_state;
|
||
|
|
|
||
|
|
/* The type of the error callback argument to backtrace functions.
|
||
|
|
This function, if not NULL, will be called for certain error cases.
|
||
|
|
The DATA argument is passed to the function that calls this one.
|
||
|
|
The MSG argument is an error message. The ERRNUM argument, if
|
||
|
|
greater than 0, holds an errno value. The MSG buffer may become
|
||
|
|
invalid after this function returns.
|
||
|
|
|
||
|
|
As a special case, the ERRNUM argument will be passed as -1 if no
|
||
|
|
debug info can be found for the executable, or if the debug info
|
||
|
|
exists but has an unsupported version, but the function requires
|
||
|
|
debug info (e.g., backtrace_full, backtrace_pcinfo). The MSG in
|
||
|
|
this case will be something along the lines of "no debug info".
|
||
|
|
Similarly, ERRNUM will be passed as -1 if there is no symbol table,
|
||
|
|
but the function requires a symbol table (e.g., backtrace_syminfo).
|
||
|
|
This may be used as a signal that some other approach should be
|
||
|
|
tried. */
|
||
|
|
|
||
|
|
typedef void (*backtrace_error_callback) (void *data, const char *msg,
|
||
|
|
int errnum);
|
||
|
|
|
||
|
|
/* Create state information for the backtrace routines. This must be
|
||
|
|
called before any of the other routines, and its return value must
|
||
|
|
be passed to all of the other routines. FILENAME is the path name
|
||
|
|
of the executable file; if it is NULL the library will try
|
||
|
|
system-specific path names. If not NULL, FILENAME must point to a
|
||
|
|
permanent buffer. If THREADED is non-zero the state may be
|
||
|
|
accessed by multiple threads simultaneously, and the library will
|
||
|
|
use appropriate atomic operations. If THREADED is zero the state
|
||
|
|
may only be accessed by one thread at a time. This returns a state
|
||
|
|
pointer on success, NULL on error. If an error occurs, this will
|
||
|
|
call the ERROR_CALLBACK routine.
|
||
|
|
|
||
|
|
Calling this function allocates resources that cannot be freed.
|
||
|
|
There is no backtrace_free_state function. The state is used to
|
||
|
|
cache information that is expensive to recompute. Programs are
|
||
|
|
expected to call this function at most once and to save the return
|
||
|
|
value for all later calls to backtrace functions. */
|
||
|
|
|
||
|
|
extern struct backtrace_state *backtrace_create_state (
|
||
|
|
const char *filename, int threaded,
|
||
|
|
backtrace_error_callback error_callback, void *data);
|
||
|
|
|
||
|
|
/* The type of the callback argument to the backtrace_full function.
|
||
|
|
DATA is the argument passed to backtrace_full. PC is the program
|
||
|
|
counter. FILENAME is the name of the file containing PC, or NULL
|
||
|
|
if not available. LINENO is the line number in FILENAME containing
|
||
|
|
PC, or 0 if not available. FUNCTION is the name of the function
|
||
|
|
containing PC, or NULL if not available. This should return 0 to
|
||
|
|
continuing tracing. The FILENAME and FUNCTION buffers may become
|
||
|
|
invalid after this function returns. */
|
||
|
|
|
||
|
|
typedef int (*backtrace_full_callback) (void *data, uintptr_t pc, uintptr_t lowaddr,
|
||
|
|
const char *filename, int lineno,
|
||
|
|
const char *function);
|
||
|
|
|
||
|
|
/* Get a full stack backtrace. SKIP is the number of frames to skip;
|
||
|
|
passing 0 will start the trace with the function calling
|
||
|
|
backtrace_full. DATA is passed to the callback routine. If any
|
||
|
|
call to CALLBACK returns a non-zero value, the stack backtrace
|
||
|
|
stops, and backtrace returns that value; this may be used to limit
|
||
|
|
the number of stack frames desired. If all calls to CALLBACK
|
||
|
|
return 0, backtrace returns 0. The backtrace_full function will
|
||
|
|
make at least one call to either CALLBACK or ERROR_CALLBACK. This
|
||
|
|
function requires debug info for the executable. */
|
||
|
|
|
||
|
|
extern int backtrace_full (struct backtrace_state *state, int skip,
|
||
|
|
backtrace_full_callback callback,
|
||
|
|
backtrace_error_callback error_callback,
|
||
|
|
void *data);
|
||
|
|
|
||
|
|
/* The type of the callback argument to the backtrace_simple function.
|
||
|
|
DATA is the argument passed to simple_backtrace. PC is the program
|
||
|
|
counter. This should return 0 to continue tracing. */
|
||
|
|
|
||
|
|
typedef int (*backtrace_simple_callback) (void *data, uintptr_t pc);
|
||
|
|
|
||
|
|
/* Get a simple backtrace. SKIP is the number of frames to skip, as
|
||
|
|
in backtrace. DATA is passed to the callback routine. If any call
|
||
|
|
to CALLBACK returns a non-zero value, the stack backtrace stops,
|
||
|
|
and backtrace_simple returns that value. Otherwise
|
||
|
|
backtrace_simple returns 0. The backtrace_simple function will
|
||
|
|
make at least one call to either CALLBACK or ERROR_CALLBACK. This
|
||
|
|
function does not require any debug info for the executable. */
|
||
|
|
|
||
|
|
extern int backtrace_simple (struct backtrace_state *state, int skip,
|
||
|
|
backtrace_simple_callback callback,
|
||
|
|
backtrace_error_callback error_callback,
|
||
|
|
void *data);
|
||
|
|
|
||
|
|
/* Print the current backtrace in a user readable format to a FILE.
|
||
|
|
SKIP is the number of frames to skip, as in backtrace_full. Any
|
||
|
|
error messages are printed to stderr. This function requires debug
|
||
|
|
info for the executable. */
|
||
|
|
|
||
|
|
extern void backtrace_print (struct backtrace_state *state, int skip, FILE *);
|
||
|
|
|
||
|
|
/* Given PC, a program counter in the current program, call the
|
||
|
|
callback function with filename, line number, and function name
|
||
|
|
information. This will normally call the callback function exactly
|
||
|
|
once. However, if the PC happens to describe an inlined call, and
|
||
|
|
the debugging information contains the necessary information, then
|
||
|
|
this may call the callback function multiple times. This will make
|
||
|
|
at least one call to either CALLBACK or ERROR_CALLBACK. This
|
||
|
|
returns the first non-zero value returned by CALLBACK, or 0. */
|
||
|
|
|
||
|
|
extern int backtrace_pcinfo (struct backtrace_state *state, uintptr_t pc,
|
||
|
|
backtrace_full_callback callback,
|
||
|
|
backtrace_error_callback error_callback,
|
||
|
|
void *data);
|
||
|
|
|
||
|
|
/* The type of the callback argument to backtrace_syminfo. DATA and
|
||
|
|
PC are the arguments passed to backtrace_syminfo. SYMNAME is the
|
||
|
|
name of the symbol for the corresponding code. SYMVAL is the
|
||
|
|
value and SYMSIZE is the size of the symbol. SYMNAME will be NULL
|
||
|
|
if no error occurred but the symbol could not be found. */
|
||
|
|
|
||
|
|
typedef void (*backtrace_syminfo_callback) (void *data, uintptr_t pc,
|
||
|
|
const char *symname,
|
||
|
|
uintptr_t symval,
|
||
|
|
uintptr_t symsize);
|
||
|
|
|
||
|
|
/* Given ADDR, an address or program counter in the current program,
|
||
|
|
call the callback information with the symbol name and value
|
||
|
|
describing the function or variable in which ADDR may be found.
|
||
|
|
This will call either CALLBACK or ERROR_CALLBACK exactly once.
|
||
|
|
This returns 1 on success, 0 on failure. This function requires
|
||
|
|
the symbol table but does not require the debug info. Note that if
|
||
|
|
the symbol table is present but ADDR could not be found in the
|
||
|
|
table, CALLBACK will be called with a NULL SYMNAME argument.
|
||
|
|
Returns 1 on success, 0 on error. */
|
||
|
|
|
||
|
|
extern int backtrace_syminfo (struct backtrace_state *state, uintptr_t addr,
|
||
|
|
backtrace_syminfo_callback callback,
|
||
|
|
backtrace_error_callback error_callback,
|
||
|
|
void *data);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|