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/**
* WinPR: Windows Portable Runtime
* Debugging Utils
*
* Copyright 2014 Armin Novak <armin.novak@thincast.com>
* Copyright 2014 Thincast Technologies GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <winpr/config.h>
#define __STDC_WANT_LIB_EXT1__ 1
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <winpr/crt.h>
#include <winpr/string.h>
#if defined(USE_EXECINFO)
#include <execinfo/debug.h>
#endif
#if defined(USE_UNWIND)
#include <unwind/debug.h>
#endif
#if defined(WINPR_HAVE_CORKSCREW)
#include <corkscrew/debug.h>
#endif
#if defined(_WIN32) || defined(_WIN64)
#include <io.h>
#include <windows/debug.h>
#endif
#include <winpr/wlog.h>
#include <winpr/debug.h>
#ifndef MIN
#define MIN(a, b) (a) < (b) ? (a) : (b)
#endif
#define TAG "com.winpr.utils.debug"
#define LOGT(...) \
do \
{ \
WLog_Print(WLog_Get(TAG), WLOG_TRACE, __VA_ARGS__); \
} while (0)
#define LOGD(...) \
do \
{ \
WLog_Print(WLog_Get(TAG), WLOG_DEBUG, __VA_ARGS__); \
} while (0)
#define LOGI(...) \
do \
{ \
WLog_Print(WLog_Get(TAG), WLOG_INFO, __VA_ARGS__); \
} while (0)
#define LOGW(...) \
do \
{ \
WLog_Print(WLog_Get(TAG), WLOG_WARN, __VA_ARGS__); \
} while (0)
#define LOGE(...) \
do \
{ \
WLog_Print(WLog_Get(TAG), WLOG_ERROR, __VA_ARGS__); \
} while (0)
#define LOGF(...) \
do \
{ \
WLog_Print(WLog_Get(TAG), WLOG_FATAL, __VA_ARGS__); \
} while (0)
static const char* support_msg = "Invalid stacktrace buffer! check if platform is supported!";
void winpr_backtrace_free(void* buffer)
{
if (!buffer)
return;
#if defined(USE_UNWIND)
winpr_unwind_backtrace_free(buffer);
#elif defined(USE_EXECINFO)
winpr_execinfo_backtrace_free(buffer);
#elif defined(WINPR_HAVE_CORKSCREW)
winpr_corkscrew_backtrace_free(buffer);
#elif defined(_WIN32) || defined(_WIN64)
winpr_win_backtrace_free(buffer);
#else
free(buffer);
LOGF(support_msg);
#endif
}
void* winpr_backtrace(DWORD size)
{
#if defined(USE_UNWIND)
return winpr_unwind_backtrace(size);
#elif defined(USE_EXECINFO)
return winpr_execinfo_backtrace(size);
#elif defined(WINPR_HAVE_CORKSCREW)
return winpr_corkscrew_backtrace(size);
#elif (defined(_WIN32) || defined(_WIN64)) && !defined(_UWP)
return winpr_win_backtrace(size);
#else
LOGF(support_msg);
/* return a non NULL buffer to allow the backtrace function familiy to succeed without failing
*/
return _strdup(support_msg);
#endif
}
char** winpr_backtrace_symbols(void* buffer, size_t* used)
{
if (used)
*used = 0;
if (!buffer)
{
LOGF(support_msg);
return NULL;
}
#if defined(USE_UNWIND)
return winpr_unwind_backtrace_symbols(buffer, used);
#elif defined(USE_EXECINFO)
return winpr_execinfo_backtrace_symbols(buffer, used);
#elif defined(WINPR_HAVE_CORKSCREW)
return winpr_corkscrew_backtrace_symbols(buffer, used);
#elif (defined(_WIN32) || defined(_WIN64)) && !defined(_UWP)
return winpr_win_backtrace_symbols(buffer, used);
#else
LOGF(support_msg);
/* We return a char** on heap that is compatible with free:
*
* 1. We allocate sizeof(char*) + strlen + 1 bytes.
* 2. The first sizeof(char*) bytes contain the pointer to the string following the pointer.
* 3. The at data + sizeof(char*) contains the actual string
*/
size_t len = strlen(support_msg);
char* ppmsg = calloc(sizeof(char*) + len + 1, sizeof(char));
if (!ppmsg)
return NULL;
char** msgptr = (char**)ppmsg;
char* msg = &ppmsg[sizeof(char*)];
*msgptr = msg;
strncpy(msg, support_msg, len);
*used = 1;
return ppmsg;
#endif
}
void winpr_backtrace_symbols_fd(void* buffer, int fd)
{
if (!buffer)
{
LOGF(support_msg);
return;
}
#if defined(USE_EXECINFO) && !defined(USE_UNWIND)
winpr_execinfo_backtrace_symbols_fd(buffer, fd);
#elif !defined(ANDROID)
{
size_t used = 0;
char** lines = winpr_backtrace_symbols(buffer, &used);
if (!lines)
return;
for (size_t i = 0; i < used; i++)
_write(fd, lines[i], (unsigned)strnlen(lines[i], UINT32_MAX));
free(lines);
}
#else
LOGF(support_msg);
#endif
}
void winpr_log_backtrace(const char* tag, DWORD level, DWORD size)
{
winpr_log_backtrace_ex(WLog_Get(tag), level, size);
}
void winpr_log_backtrace_ex(wLog* log, DWORD level, DWORD size)
{
size_t used = 0;
char** msg = NULL;
void* stack = winpr_backtrace(20);
if (!stack)
{
WLog_Print(log, WLOG_ERROR, "winpr_backtrace failed!\n");
goto fail;
}
msg = winpr_backtrace_symbols(stack, &used);
if (msg)
{
for (size_t x = 0; x < used; x++)
WLog_Print(log, level, "%" PRIuz ": %s", x, msg[x]);
}
free(msg);
fail:
winpr_backtrace_free(stack);
}
char* winpr_strerror(DWORD dw, char* dmsg, size_t size)
{
#ifdef __STDC_LIB_EXT1__
strerror_s(dw, dmsg, size);
#elif defined(WINPR_HAVE_STRERROR_R)
strerror_r(dw, dmsg, size);
#else
_snprintf(dmsg, size, "%s", strerror(dw));
#endif
return dmsg;
}
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