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/**********************************************************************
*
* Name: cpl_error.cpp
* Project: CPL - Common Portability Library
* Purpose: Error handling functions.
* Author: Daniel Morissette, danmo@videotron.ca
*
**********************************************************************
* Copyright (c) 1998, Daniel Morissette
* Copyright (c) 2007-2013, Even Rouault <even dot rouault at spatialys.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include "cpl_error.h"
#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include "cpl_config.h"
#include "cpl_conv.h"
#include "cpl_multiproc.h"
#include "cpl_string.h"
#include "cpl_vsi.h"
#include "cpl_error_internal.h"
#if !defined(va_copy) && defined(__va_copy)
#define va_copy __va_copy
#endif
#define TIMESTAMP_DEBUG
// #define MEMORY_DEBUG
static CPLMutex *hErrorMutex = nullptr;
static void *pErrorHandlerUserData = nullptr;
static CPLErrorHandler pfnErrorHandler = CPLDefaultErrorHandler;
static bool gbCatchDebug = true;
constexpr int DEFAULT_LAST_ERR_MSG_SIZE =
#if !defined(HAVE_VSNPRINTF)
20000
#else
500
#endif
;
typedef struct errHandler
{
struct errHandler *psNext;
void *pUserData;
CPLErrorHandler pfnHandler;
bool bCatchDebug;
} CPLErrorHandlerNode;
typedef struct
{
CPLErrorNum nLastErrNo;
CPLErr eLastErrType;
CPLErrorHandlerNode *psHandlerStack;
int nLastErrMsgMax;
int nFailureIntoWarning;
GUInt32 nErrorCounter;
char szLastErrMsg[DEFAULT_LAST_ERR_MSG_SIZE];
// Do not add anything here. szLastErrMsg must be the last field.
// See CPLRealloc() below.
} CPLErrorContext;
constexpr CPLErrorContext sNoErrorContext = {0, CE_None, nullptr, 0, 0, 0, ""};
constexpr CPLErrorContext sWarningContext = {
0, CE_Warning, nullptr, 0, 0, 0, "A warning was emitted"};
constexpr CPLErrorContext sFailureContext = {
0, CE_Warning, nullptr, 0, 0, 0, "A failure was emitted"};
#define IS_PREFEFINED_ERROR_CTX(psCtxt) \
(psCtx == &sNoErrorContext || psCtx == &sWarningContext || \
psCtxt == &sFailureContext)
/************************************************************************/
/* CPLErrorContextGetString() */
/************************************************************************/
// Makes clang -fsanitize=undefined happy since it doesn't like
// dereferencing szLastErrMsg[i>=DEFAULT_LAST_ERR_MSG_SIZE]
static char *CPLErrorContextGetString(CPLErrorContext *psCtxt)
{
return psCtxt->szLastErrMsg;
}
/************************************************************************/
/* CPLGetErrorContext() */
/************************************************************************/
static CPLErrorContext *CPLGetErrorContext()
{
int bError = FALSE;
CPLErrorContext *psCtx = reinterpret_cast<CPLErrorContext *>(
CPLGetTLSEx(CTLS_ERRORCONTEXT, &bError));
if (bError)
return nullptr;
if (psCtx == nullptr)
{
psCtx = static_cast<CPLErrorContext *>(
VSICalloc(sizeof(CPLErrorContext), 1));
if (psCtx == nullptr)
{
fprintf(stderr, "Out of memory attempting to report error.\n");
return nullptr;
}
psCtx->eLastErrType = CE_None;
psCtx->nLastErrMsgMax = sizeof(psCtx->szLastErrMsg);
CPLSetTLS(CTLS_ERRORCONTEXT, psCtx, TRUE);
}
return psCtx;
}
/************************************************************************/
/* CPLGetErrorHandlerUserData() */
/************************************************************************/
/**
* Fetch the user data for the error context
*
* Fetches the user data for the current error context. You can
* set the user data for the error context when you add your handler by
* issuing CPLSetErrorHandlerEx() and CPLPushErrorHandlerEx(). Note that
* user data is primarily intended for providing context within error handlers
* themselves, but they could potentially be abused in other useful ways with
* the usual caveat emptor understanding.
*
* @return the user data pointer for the error context
*/
void *CPL_STDCALL CPLGetErrorHandlerUserData(void)
{
int bError = FALSE;
// check if there is an active error being propagated through the handlers
void **pActiveUserData = reinterpret_cast<void **>(
CPLGetTLSEx(CTLS_ERRORHANDLERACTIVEDATA, &bError));
if (bError)
return nullptr;
if (pActiveUserData != nullptr)
{
return *pActiveUserData;
}
// get the current threadlocal or global error context user data
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr || IS_PREFEFINED_ERROR_CTX(psCtx))
abort();
return reinterpret_cast<void *>(psCtx->psHandlerStack
? psCtx->psHandlerStack->pUserData
: pErrorHandlerUserData);
}
static void ApplyErrorHandler(CPLErrorContext *psCtx, CPLErr eErrClass,
CPLErrorNum err_no, const char *pszMessage)
{
void **pActiveUserData;
bool bProcessed = false;
// CTLS_ERRORHANDLERACTIVEDATA holds the active error handler userData
if (psCtx->psHandlerStack != nullptr)
{
// iterate through the threadlocal handler stack
if ((eErrClass != CE_Debug) || psCtx->psHandlerStack->bCatchDebug)
{
// call the error handler
pActiveUserData = &(psCtx->psHandlerStack->pUserData);
CPLSetTLS(CTLS_ERRORHANDLERACTIVEDATA, pActiveUserData, false);
psCtx->psHandlerStack->pfnHandler(eErrClass, err_no, pszMessage);
bProcessed = true;
}
else
{
// need to iterate to a parent handler for debug messages
CPLErrorHandlerNode *psNode = psCtx->psHandlerStack->psNext;
while (psNode != nullptr)
{
if (psNode->bCatchDebug)
{
pActiveUserData = &(psNode->pUserData);
CPLSetTLS(CTLS_ERRORHANDLERACTIVEDATA, pActiveUserData,
false);
psNode->pfnHandler(eErrClass, err_no, pszMessage);
bProcessed = true;
break;
}
psNode = psNode->psNext;
}
}
}
if (!bProcessed)
{
// hit the global error handler
CPLMutexHolderD(&hErrorMutex);
if ((eErrClass != CE_Debug) || gbCatchDebug)
{
if (pfnErrorHandler != nullptr)
{
pActiveUserData = &pErrorHandlerUserData;
CPLSetTLS(CTLS_ERRORHANDLERACTIVEDATA, pActiveUserData, false);
pfnErrorHandler(eErrClass, err_no, pszMessage);
}
}
else /* if( eErrClass == CE_Debug ) */
{
// for CPLDebug messages we propagate to the default error handler
pActiveUserData = nullptr;
CPLSetTLS(CTLS_ERRORHANDLERACTIVEDATA, pActiveUserData, false);
CPLDefaultErrorHandler(eErrClass, err_no, pszMessage);
}
}
CPLSetTLS(CTLS_ERRORHANDLERACTIVEDATA, nullptr, false);
}
/**********************************************************************
* CPLError()
**********************************************************************/
/**
* Report an error.
*
* This function reports an error in a manner that can be hooked
* and reported appropriate by different applications.
*
* The effect of this function can be altered by applications by installing
* a custom error handling using CPLSetErrorHandler().
*
* The eErrClass argument can have the value CE_Warning indicating that the
* message is an informational warning, CE_Failure indicating that the
* action failed, but that normal recover mechanisms will be used or
* CE_Fatal meaning that a fatal error has occurred, and that CPLError()
* should not return.
*
* The default behavior of CPLError() is to report errors to stderr,
* and to abort() after reporting a CE_Fatal error. It is expected that
* some applications will want to suppress error reporting, and will want to
* install a C++ exception, or longjmp() approach to no local fatal error
* recovery.
*
* Regardless of how application error handlers or the default error
* handler choose to handle an error, the error number, and message will
* be stored for recovery with CPLGetLastErrorNo() and CPLGetLastErrorMsg().
*
* @param eErrClass one of CE_Warning, CE_Failure or CE_Fatal.
* @param err_no the error number (CPLE_*) from cpl_error.h.
* @param fmt a printf() style format string. Any additional arguments
* will be treated as arguments to fill in this format in a manner
* similar to printf().
*/
void CPLError(CPLErr eErrClass, CPLErrorNum err_no,
CPL_FORMAT_STRING(const char *fmt), ...)
{
va_list args;
// Expand the error message.
va_start(args, fmt);
CPLErrorV(eErrClass, err_no, fmt, args);
va_end(args);
}
/************************************************************************/
/* CPLErrorV() */
/************************************************************************/
/** Same as CPLError() but with a va_list */
void CPLErrorV(CPLErr eErrClass, CPLErrorNum err_no, const char *fmt,
va_list args)
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr || IS_PREFEFINED_ERROR_CTX(psCtx))
{
int bMemoryError = FALSE;
if (eErrClass == CE_Warning)
{
CPLSetTLSWithFreeFuncEx(
CTLS_ERRORCONTEXT,
reinterpret_cast<void *>(
const_cast<CPLErrorContext *>(&sWarningContext)),
nullptr, &bMemoryError);
}
else if (eErrClass == CE_Failure)
{
CPLSetTLSWithFreeFuncEx(
CTLS_ERRORCONTEXT,
reinterpret_cast<void *>(
const_cast<CPLErrorContext *>(&sFailureContext)),
nullptr, &bMemoryError);
}
// TODO: Is it possible to move the entire szShortMessage under the if
// pfnErrorHandler?
char szShortMessage[80] = {};
CPLvsnprintf(szShortMessage, sizeof(szShortMessage), fmt, args);
CPLMutexHolderD(&hErrorMutex);
if (pfnErrorHandler != nullptr)
pfnErrorHandler(eErrClass, err_no, szShortMessage);
return;
}
if (psCtx->nFailureIntoWarning > 0 && eErrClass == CE_Failure)
eErrClass = CE_Warning;
/* -------------------------------------------------------------------- */
/* Expand the error message */
/* -------------------------------------------------------------------- */
#if defined(HAVE_VSNPRINTF)
{
va_list wrk_args;
#ifdef va_copy
va_copy(wrk_args, args);
#else
wrk_args = args;
#endif
/* --------------------------------------------------------------------
*/
/* If CPL_ACCUM_ERROR_MSG=ON accumulate the error messages, */
/* rather than just replacing the last error message. */
/* --------------------------------------------------------------------
*/
int nPreviousSize = 0;
if (psCtx->psHandlerStack != nullptr &&
EQUAL(CPLGetConfigOption("CPL_ACCUM_ERROR_MSG", ""), "ON"))
{
nPreviousSize = static_cast<int>(strlen(psCtx->szLastErrMsg));
if (nPreviousSize)
{
if (nPreviousSize + 1 + 1 >= psCtx->nLastErrMsgMax)
{
psCtx->nLastErrMsgMax *= 3;
psCtx = static_cast<CPLErrorContext *>(
CPLRealloc(psCtx, sizeof(CPLErrorContext) -
DEFAULT_LAST_ERR_MSG_SIZE +
psCtx->nLastErrMsgMax + 1));
CPLSetTLS(CTLS_ERRORCONTEXT, psCtx, TRUE);
}
char *pszLastErrMsg = CPLErrorContextGetString(psCtx);
pszLastErrMsg[nPreviousSize] = '\n';
pszLastErrMsg[nPreviousSize + 1] = '\0';
nPreviousSize++;
}
}
int nPR = 0;
while (((nPR = CPLvsnprintf(psCtx->szLastErrMsg + nPreviousSize,
psCtx->nLastErrMsgMax - nPreviousSize, fmt,
wrk_args)) == -1 ||
nPR >= psCtx->nLastErrMsgMax - nPreviousSize - 1) &&
psCtx->nLastErrMsgMax < 1000000)
{
#ifdef va_copy
va_end(wrk_args);
va_copy(wrk_args, args);
#else
wrk_args = args;
#endif
psCtx->nLastErrMsgMax *= 3;
psCtx = static_cast<CPLErrorContext *>(CPLRealloc(
psCtx, sizeof(CPLErrorContext) - DEFAULT_LAST_ERR_MSG_SIZE +
psCtx->nLastErrMsgMax + 1));
CPLSetTLS(CTLS_ERRORCONTEXT, psCtx, TRUE);
}
va_end(wrk_args);
}
#else
// !HAVE_VSNPRINTF
CPLvsnprintf(psCtx->szLastErrMsg, psCtx->nLastErrMsgMax, fmt, args);
#endif
/* -------------------------------------------------------------------- */
/* Obfuscate any password in error message */
/* -------------------------------------------------------------------- */
char *pszPassword = strstr(psCtx->szLastErrMsg, "password=");
if (pszPassword != nullptr)
{
char *pszIter = pszPassword + strlen("password=");
while (*pszIter != ' ' && *pszIter != '\0')
{
*pszIter = 'X';
pszIter++;
}
}
/* -------------------------------------------------------------------- */
/* If the user provided an handling function, then */
/* call it, otherwise print the error to stderr and return. */
/* -------------------------------------------------------------------- */
psCtx->nLastErrNo = err_no;
psCtx->eLastErrType = eErrClass;
if (psCtx->nErrorCounter == ~(0U))
psCtx->nErrorCounter = 0;
else
psCtx->nErrorCounter++;
if (CPLGetConfigOption("CPL_LOG_ERRORS", nullptr) != nullptr)
CPLDebug("CPLError", "%s", psCtx->szLastErrMsg);
/* -------------------------------------------------------------------- */
/* Invoke the current error handler. */
/* -------------------------------------------------------------------- */
ApplyErrorHandler(psCtx, eErrClass, err_no, psCtx->szLastErrMsg);
if (eErrClass == CE_Fatal)
abort();
}
/************************************************************************/
/* CPLEmergencyError() */
/************************************************************************/
/**
* Fatal error when things are bad.
*
* This function should be called in an emergency situation where
* it is unlikely that a regular error report would work. This would
* include in the case of heap exhaustion for even small allocations,
* or any failure in the process of reporting an error (such as TLS
* allocations).
*
* This function should never return. After the error message has been
* reported as best possible, the application will abort() similarly to how
* CPLError() aborts on CE_Fatal class errors.
*
* @param pszMessage the error message to report.
*/
void CPLEmergencyError(const char *pszMessage)
{
static bool bInEmergencyError = false;
// If we are already in emergency error then one of the
// following failed, so avoid them the second time through.
if (!bInEmergencyError)
{
bInEmergencyError = true;
CPLErrorContext *psCtx =
static_cast<CPLErrorContext *>(CPLGetTLS(CTLS_ERRORCONTEXT));
ApplyErrorHandler(psCtx, CE_Fatal, CPLE_AppDefined, pszMessage);
}
// Ultimate fallback.
fprintf(stderr, "FATAL: %s\n", pszMessage);
abort();
}
/************************************************************************/
/* CPLGetProcessMemorySize() */
/************************************************************************/
#ifdef MEMORY_DEBUG
#ifdef __linux
static int CPLGetProcessMemorySize()
{
FILE *fp = fopen("/proc/self/status", "r");
if (fp == nullptr)
return -1;
int nRet = -1;
char szLine[128] = {};
while (fgets(szLine, sizeof(szLine), fp) != nullptr)
{
if (STARTS_WITH(szLine, "VmSize:"))
{
const char *pszPtr = szLine;
while (!(*pszPtr == '\0' || (*pszPtr >= '0' && *pszPtr <= '9')))
pszPtr++;
nRet = atoi(pszPtr);
break;
}
}
fclose(fp);
return nRet;
}
#else
#error CPLGetProcessMemorySize() unimplemented for this OS
#endif
#endif // def MEMORY_DEBUG
/************************************************************************/
/* CPLGettimeofday() */
/************************************************************************/
#if defined(_WIN32) && !defined(__CYGWIN__)
#include <sys/timeb.h>
namespace
{
struct CPLTimeVal
{
time_t tv_sec; /* seconds */
long tv_usec; /* and microseconds */
};
} // namespace
static int CPLGettimeofday(struct CPLTimeVal *tp, void * /* timezonep*/)
{
struct _timeb theTime;
_ftime(&theTime);
tp->tv_sec = static_cast<time_t>(theTime.time);
tp->tv_usec = theTime.millitm * 1000;
return 0;
}
#else
#include <sys/time.h> /* for gettimeofday() */
#define CPLTimeVal timeval
#define CPLGettimeofday(t, u) gettimeofday(t, u)
#endif
/************************************************************************/
/* CPLDebug() */
/************************************************************************/
/**
* Display a debugging message.
*
* The category argument is used in conjunction with the CPL_DEBUG
* environment variable to establish if the message should be displayed.
* If the CPL_DEBUG environment variable is not set, no debug messages
* are emitted (use CPLError(CE_Warning, ...) to ensure messages are displayed).
* If CPL_DEBUG is set, but is an empty string or the word "ON" then all
* debug messages are shown. Otherwise only messages whose category appears
* somewhere within the CPL_DEBUG value are displayed (as determined by
* strstr()).
*
* Categories are usually an identifier for the subsystem producing the
* error. For instance "GDAL" might be used for the GDAL core, and "TIFF"
* for messages from the TIFF translator.
*
* @param pszCategory name of the debugging message category.
* @param pszFormat printf() style format string for message to display.
* Remaining arguments are assumed to be for format.
*/
#ifdef WITHOUT_CPLDEBUG
// Do not include CPLDebug. Only available in custom builds.
#else
void CPLDebug(const char *pszCategory, CPL_FORMAT_STRING(const char *pszFormat),
...)
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr || IS_PREFEFINED_ERROR_CTX(psCtx))
return;
const char *pszDebug = CPLGetConfigOption("CPL_DEBUG", nullptr);
/* -------------------------------------------------------------------- */
/* Does this message pass our current criteria? */
/* -------------------------------------------------------------------- */
if (pszDebug == nullptr)
return;
if (!EQUAL(pszDebug, "ON") && !EQUAL(pszDebug, ""))
{
const size_t nLen = strlen(pszCategory);
size_t i = 0;
for (i = 0; pszDebug[i] != '\0'; i++)
{
if (EQUALN(pszCategory, pszDebug + i, nLen))
break;
}
if (pszDebug[i] == '\0')
return;
}
/* -------------------------------------------------------------------- */
/* Allocate a block for the error. */
/* -------------------------------------------------------------------- */
const int ERROR_MAX = 25000;
char *pszMessage = static_cast<char *>(VSIMalloc(ERROR_MAX));
if (pszMessage == nullptr)
return;
/* -------------------------------------------------------------------- */
/* Dal -- always log a timestamp as the first part of the line */
/* to ensure one is looking at what one should be looking at! */
/* -------------------------------------------------------------------- */
pszMessage[0] = '\0';
#ifdef TIMESTAMP_DEBUG
if (CPLGetConfigOption("CPL_TIMESTAMP", nullptr) != nullptr)
{
static struct CPLTimeVal tvStart;
static const auto unused = CPLGettimeofday(&tvStart, nullptr);
CPL_IGNORE_RET_VAL(unused);
struct CPLTimeVal tv;
CPLGettimeofday(&tv, nullptr);
strcpy(pszMessage, "[");
strcat(pszMessage, VSICTime(static_cast<unsigned long>(tv.tv_sec)));
// On windows anyway, ctime puts a \n at the end, but I'm not
// convinced this is standard behavior, so we'll get rid of it
// carefully
if (pszMessage[strlen(pszMessage) - 1] == '\n')
{
pszMessage[strlen(pszMessage) - 1] = 0; // blow it out
}
CPLsnprintf(pszMessage + strlen(pszMessage),
ERROR_MAX - strlen(pszMessage),
"].%04d, %03.04f: ", static_cast<int>(tv.tv_usec / 100),
tv.tv_sec + tv.tv_usec * 1e-6 -
(tvStart.tv_sec + tvStart.tv_usec * 1e-6));
}
#endif
/* -------------------------------------------------------------------- */
/* Add the process memory size. */
/* -------------------------------------------------------------------- */
#ifdef MEMORY_DEBUG
char szVmSize[32] = {};
CPLsprintf(szVmSize, "[VmSize: %d] ", CPLGetProcessMemorySize());
strcat(pszMessage, szVmSize);
#endif
/* -------------------------------------------------------------------- */
/* Add the category. */
/* -------------------------------------------------------------------- */
strcat(pszMessage, pszCategory);
strcat(pszMessage, ": ");
/* -------------------------------------------------------------------- */
/* Format the application provided portion of the debug message. */
/* -------------------------------------------------------------------- */
va_list args;
va_start(args, pszFormat);
CPLvsnprintf(pszMessage + strlen(pszMessage),
ERROR_MAX - strlen(pszMessage), pszFormat, args);
va_end(args);
/* -------------------------------------------------------------------- */
/* Obfuscate any password in error message */
/* -------------------------------------------------------------------- */
char *pszPassword = strstr(pszMessage, "password=");
if (pszPassword != nullptr)
{
char *pszIter = pszPassword + strlen("password=");
while (*pszIter != ' ' && *pszIter != '\0')
{
*pszIter = 'X';
pszIter++;
}
}
/* -------------------------------------------------------------------- */
/* Invoke the current error handler. */
/* -------------------------------------------------------------------- */
ApplyErrorHandler(psCtx, CE_Debug, CPLE_None, pszMessage);
VSIFree(pszMessage);
}
#endif // !WITHOUT_CPLDEBUG
/**********************************************************************
* CPLErrorReset()
**********************************************************************/
/**
* Erase any traces of previous errors.
*
* This is normally used to ensure that an error which has been recovered
* from does not appear to be still in play with high level functions.
*/
void CPL_STDCALL CPLErrorReset()
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr)
return;
if (IS_PREFEFINED_ERROR_CTX(psCtx))
{
int bMemoryError = FALSE;
CPLSetTLSWithFreeFuncEx(
CTLS_ERRORCONTEXT,
reinterpret_cast<void *>(
const_cast<CPLErrorContext *>(&sNoErrorContext)),
nullptr, &bMemoryError);
return;
}
psCtx->nLastErrNo = CPLE_None;
psCtx->szLastErrMsg[0] = '\0';
psCtx->eLastErrType = CE_None;
psCtx->nErrorCounter = 0;
}
/**********************************************************************
* CPLErrorSetState()
**********************************************************************/
/**
* Restore an error state, without emitting an error.
*
* Can be useful if a routine might call CPLErrorReset() and one wants to
* preserve the previous error state.
*
* @since GDAL 2.0
*/
void CPL_DLL CPLErrorSetState(CPLErr eErrClass, CPLErrorNum err_no,
const char *pszMsg)
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr)
return;
if (IS_PREFEFINED_ERROR_CTX(psCtx))
{
int bMemoryError = FALSE;
if (eErrClass == CE_None)
CPLSetTLSWithFreeFuncEx(
CTLS_ERRORCONTEXT,
reinterpret_cast<void *>(
const_cast<CPLErrorContext *>(&sNoErrorContext)),
nullptr, &bMemoryError);
else if (eErrClass == CE_Warning)
CPLSetTLSWithFreeFuncEx(
CTLS_ERRORCONTEXT,
reinterpret_cast<void *>(
const_cast<CPLErrorContext *>(&sWarningContext)),
nullptr, &bMemoryError);
else if (eErrClass == CE_Failure)
CPLSetTLSWithFreeFuncEx(
CTLS_ERRORCONTEXT,
reinterpret_cast<void *>(
const_cast<CPLErrorContext *>(&sFailureContext)),
nullptr, &bMemoryError);
return;
}
psCtx->nLastErrNo = err_no;
const size_t size = std::min(static_cast<size_t>(psCtx->nLastErrMsgMax - 1),
strlen(pszMsg));
char *pszLastErrMsg = CPLErrorContextGetString(psCtx);
memcpy(pszLastErrMsg, pszMsg, size);
pszLastErrMsg[size] = '\0';
psCtx->eLastErrType = eErrClass;
}
/**********************************************************************
* CPLGetLastErrorNo()
**********************************************************************/
/**
* Fetch the last error number.
*
* Fetches the last error number posted with CPLError(), that hasn't
* been cleared by CPLErrorReset(). This is the error number, not the error
* class.
*
* @return the error number of the last error to occur, or CPLE_None (0)
* if there are no posted errors.
*/
CPLErrorNum CPL_STDCALL CPLGetLastErrorNo()
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr)
return 0;
return psCtx->nLastErrNo;
}
/**********************************************************************
* CPLGetLastErrorType()
**********************************************************************/
/**
* Fetch the last error type.
*
* Fetches the last error type posted with CPLError(), that hasn't
* been cleared by CPLErrorReset(). This is the error class, not the error
* number.
*
* @return the error type of the last error to occur, or CE_None (0)
* if there are no posted errors.
*/
CPLErr CPL_STDCALL CPLGetLastErrorType()
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr)
return CE_None;
return psCtx->eLastErrType;
}
/**********************************************************************
* CPLGetLastErrorMsg()
**********************************************************************/
/**
* Get the last error message.
*
* Fetches the last error message posted with CPLError(), that hasn't
* been cleared by CPLErrorReset(). The returned pointer is to an internal
* string that should not be altered or freed.
*
* @return the last error message, or NULL if there is no posted error
* message.
*/
const char *CPL_STDCALL CPLGetLastErrorMsg()
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr)
return "";
return psCtx->szLastErrMsg;
}
/**********************************************************************
* CPLGetErrorCounter()
**********************************************************************/
/**
* Get the error counter
*
* Fetches the number of errors emitted in the current error context,
* since the last call to CPLErrorReset()
*
* @return the error counter.
* @since GDAL 2.3
*/
GUInt32 CPL_STDCALL CPLGetErrorCounter()
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr)
return 0;
return psCtx->nErrorCounter;
}
/************************************************************************/
/* CPLDefaultErrorHandler() */
/************************************************************************/
static FILE *fpLog = stderr;
static bool bLogInit = false;
static FILE *CPLfopenUTF8(const char *pszFilename, const char *pszAccess)
{
FILE *f;
#ifdef _WIN32
wchar_t *pwszFilename =
CPLRecodeToWChar(pszFilename, CPL_ENC_UTF8, CPL_ENC_UCS2);
wchar_t *pwszAccess =
CPLRecodeToWChar(pszAccess, CPL_ENC_UTF8, CPL_ENC_UCS2);
f = _wfopen(pwszFilename, pwszAccess);
VSIFree(pwszFilename);
VSIFree(pwszAccess);
#else
f = fopen(pszFilename, pszAccess);
#endif
return f;
}
/** Default error handler. */
void CPL_STDCALL CPLDefaultErrorHandler(CPLErr eErrClass, CPLErrorNum nError,
const char *pszErrorMsg)
{
static int nCount = 0;
static int nMaxErrors = -1;
static const char *pszErrorSeparator = ":";
if (eErrClass != CE_Debug)
{
if (nMaxErrors == -1)
{
nMaxErrors =
atoi(CPLGetConfigOption("CPL_MAX_ERROR_REPORTS", "1000"));
// If running GDAL as a CustomBuild Command os MSBuild, "ERROR bla:"
// is considered as failing the job. This is rarely the intended
// behavior
pszErrorSeparator = CPLGetConfigOption("CPL_ERROR_SEPARATOR", ":");
}
nCount++;
if (nCount > nMaxErrors && nMaxErrors > 0)
return;
}
if (!bLogInit)
{
bLogInit = true;
fpLog = stderr;
const char *pszLog = CPLGetConfigOption("CPL_LOG", nullptr);
if (pszLog != nullptr)
{
const bool bAppend =
CPLGetConfigOption("CPL_LOG_APPEND", nullptr) != nullptr;
const char *pszAccess = bAppend ? "at" : "wt";
fpLog = CPLfopenUTF8(pszLog, pszAccess);
if (fpLog == nullptr)
fpLog = stderr;
}
}
if (eErrClass == CE_Debug)
fprintf(fpLog, "%s\n", pszErrorMsg);
else if (eErrClass == CE_Warning)
fprintf(fpLog, "Warning %d: %s\n", nError, pszErrorMsg);
else
fprintf(fpLog, "ERROR %d%s %s\n", nError, pszErrorSeparator,
pszErrorMsg);
if (eErrClass != CE_Debug && nMaxErrors > 0 && nCount == nMaxErrors)
{
fprintf(fpLog,
"More than %d errors or warnings have been reported. "
"No more will be reported from now.\n",
nMaxErrors);
}
fflush(fpLog);
}
/************************************************************************/
/* CPLQuietErrorHandler() */
/************************************************************************/
/** Error handler that does not do anything, except for debug messages. */
void CPL_STDCALL CPLQuietErrorHandler(CPLErr eErrClass, CPLErrorNum nError,
const char *pszErrorMsg)
{
if (eErrClass == CE_Debug)
CPLDefaultErrorHandler(eErrClass, nError, pszErrorMsg);
}
/************************************************************************/
/* CPLLoggingErrorHandler() */
/************************************************************************/
/** Error handler that logs into the file defined by the CPL_LOG configuration
* option, or stderr otherwise.
*/
void CPL_STDCALL CPLLoggingErrorHandler(CPLErr eErrClass, CPLErrorNum nError,
const char *pszErrorMsg)
{
if (!bLogInit)
{
bLogInit = true;
CPLSetConfigOption("CPL_TIMESTAMP", "ON");
const char *cpl_log = CPLGetConfigOption("CPL_LOG", nullptr);
fpLog = stderr;
if (cpl_log != nullptr && EQUAL(cpl_log, "OFF"))
{
fpLog = nullptr;
}
else if (cpl_log != nullptr)
{
size_t nPathLen = strlen(cpl_log) + 20;
char *pszPath = static_cast<char *>(CPLMalloc(nPathLen));
strcpy(pszPath, cpl_log);
int i = 0;
while ((fpLog = CPLfopenUTF8(pszPath, "rt")) != nullptr)
{
fclose(fpLog);
// Generate sequenced log file names, inserting # before ext.
if (strrchr(cpl_log, '.') == nullptr)
{
snprintf(pszPath, nPathLen, "%s_%d%s", cpl_log, i++,
".log");
}
else
{
size_t pos = 0;
char *cpl_log_base = CPLStrdup(cpl_log);
pos = strcspn(cpl_log_base, ".");
if (pos > 0)
{
cpl_log_base[pos] = '\0';
}
snprintf(pszPath, nPathLen, "%s_%d%s", cpl_log_base, i++,
".log");
CPLFree(cpl_log_base);
}
}
fpLog = CPLfopenUTF8(pszPath, "wt");
CPLFree(pszPath);
}
}
if (fpLog == nullptr)
return;
if (eErrClass == CE_Debug)
fprintf(fpLog, "%s\n", pszErrorMsg);
else if (eErrClass == CE_Warning)
fprintf(fpLog, "Warning %d: %s\n", nError, pszErrorMsg);
else
fprintf(fpLog, "ERROR %d: %s\n", nError, pszErrorMsg);
fflush(fpLog);
}
/**********************************************************************
* CPLTurnFailureIntoWarning() *
**********************************************************************/
/** Whether failures should be turned into warnings.
*/
void CPLTurnFailureIntoWarning(int bOn)
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr || IS_PREFEFINED_ERROR_CTX(psCtx))
{
fprintf(stderr, "CPLTurnFailureIntoWarning() failed.\n");
return;
}
psCtx->nFailureIntoWarning += (bOn) ? 1 : -1;
if (psCtx->nFailureIntoWarning < 0)
{
CPLDebug("CPL", "Wrong nesting of CPLTurnFailureIntoWarning(TRUE) / "
"CPLTurnFailureIntoWarning(FALSE)");
}
}
/**********************************************************************
* CPLSetErrorHandlerEx() *
**********************************************************************/
/**
* Install custom error handle with user's data. This method is
* essentially CPLSetErrorHandler with an added pointer to pUserData.
* The pUserData is not returned in the CPLErrorHandler, however, and
* must be fetched via CPLGetErrorHandlerUserData.
*
* @param pfnErrorHandlerNew new error handler function.
* @param pUserData User data to carry along with the error context.
* @return returns the previously installed error handler.
*/
CPLErrorHandler CPL_STDCALL
CPLSetErrorHandlerEx(CPLErrorHandler pfnErrorHandlerNew, void *pUserData)
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr || IS_PREFEFINED_ERROR_CTX(psCtx))
{
fprintf(stderr, "CPLSetErrorHandlerEx() failed.\n");
return nullptr;
}
if (psCtx->psHandlerStack != nullptr)
{
CPLDebug("CPL", "CPLSetErrorHandler() called with an error handler on "
"the local stack. New error handler will not be used "
"immediately.");
}
CPLErrorHandler pfnOldHandler = nullptr;
{
CPLMutexHolderD(&hErrorMutex);
pfnOldHandler = pfnErrorHandler;
pfnErrorHandler = pfnErrorHandlerNew;
pErrorHandlerUserData = pUserData;
}
return pfnOldHandler;
}
/**********************************************************************
* CPLSetErrorHandler() *
**********************************************************************/
/**
* Install custom error handler.
*
* Allow the library's user to specify an error handler function.
* A valid error handler is a C function with the following prototype:
*
* <pre>
* void MyErrorHandler(CPLErr eErrClass, int err_no, const char *msg)
* </pre>
*
* Pass NULL to come back to the default behavior. The default behavior
* (CPLDefaultErrorHandler()) is to write the message to stderr.
*
* The msg will be a partially formatted error message not containing the
* "ERROR %d:" portion emitted by the default handler. Message formatting
* is handled by CPLError() before calling the handler. If the error
* handler function is passed a CE_Fatal class error and returns, then
* CPLError() will call abort(). Applications wanting to interrupt this
* fatal behavior will have to use longjmp(), or a C++ exception to
* indirectly exit the function.
*
* Another standard error handler is CPLQuietErrorHandler() which doesn't
* make any attempt to report the passed error or warning messages but
* will process debug messages via CPLDefaultErrorHandler.
*
* Note that error handlers set with CPLSetErrorHandler() apply to all
* threads in an application, while error handlers set with CPLPushErrorHandler
* are thread-local. However, any error handlers pushed with
* CPLPushErrorHandler (and not removed with CPLPopErrorHandler) take
* precedence over the global error handlers set with CPLSetErrorHandler().
* Generally speaking CPLSetErrorHandler() would be used to set a desired
* global error handler, while CPLPushErrorHandler() would be used to install
* a temporary local error handler, such as CPLQuietErrorHandler() to suppress
* error reporting in a limited segment of code.
*
* @param pfnErrorHandlerNew new error handler function.
* @return returns the previously installed error handler.
*/
CPLErrorHandler CPL_STDCALL
CPLSetErrorHandler(CPLErrorHandler pfnErrorHandlerNew)
{
return CPLSetErrorHandlerEx(pfnErrorHandlerNew, nullptr);
}
/************************************************************************/
/* CPLPushErrorHandler() */
/************************************************************************/
/**
* Push a new CPLError handler.
*
* This pushes a new error handler on the thread-local error handler
* stack. This handler will be used until removed with CPLPopErrorHandler().
*
* The CPLSetErrorHandler() docs have further information on how
* CPLError handlers work.
*
* @param pfnErrorHandlerNew new error handler function.
*/
void CPL_STDCALL CPLPushErrorHandler(CPLErrorHandler pfnErrorHandlerNew)
{
CPLPushErrorHandlerEx(pfnErrorHandlerNew, nullptr);
}
/************************************************************************/
/* CPLPushErrorHandlerEx() */
/************************************************************************/
/**
* Push a new CPLError handler with user data on the error context.
*
* This pushes a new error handler on the thread-local error handler
* stack. This handler will be used until removed with CPLPopErrorHandler().
* Obtain the user data back by using CPLGetErrorContext().
*
* The CPLSetErrorHandler() docs have further information on how
* CPLError handlers work.
*
* @param pfnErrorHandlerNew new error handler function.
* @param pUserData User data to put on the error context.
*/
void CPL_STDCALL CPLPushErrorHandlerEx(CPLErrorHandler pfnErrorHandlerNew,
void *pUserData)
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr || IS_PREFEFINED_ERROR_CTX(psCtx))
{
fprintf(stderr, "CPLPushErrorHandlerEx() failed.\n");
return;
}
CPLErrorHandlerNode *psNode = static_cast<CPLErrorHandlerNode *>(
CPLMalloc(sizeof(CPLErrorHandlerNode)));
psNode->psNext = psCtx->psHandlerStack;
psNode->pfnHandler = pfnErrorHandlerNew;
psNode->pUserData = pUserData;
psNode->bCatchDebug = true;
psCtx->psHandlerStack = psNode;
}
/************************************************************************/
/* CPLPopErrorHandler() */
/************************************************************************/
/**
* Pop error handler off stack.
*
* Discards the current error handler on the error handler stack, and restores
* the one in use before the last CPLPushErrorHandler() call. This method
* has no effect if there are no error handlers on the current threads error
* handler stack.
*/
void CPL_STDCALL CPLPopErrorHandler()
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr || IS_PREFEFINED_ERROR_CTX(psCtx))
{
fprintf(stderr, "CPLPopErrorHandler() failed.\n");
return;
}
if (psCtx->psHandlerStack != nullptr)
{
CPLErrorHandlerNode *psNode = psCtx->psHandlerStack;
psCtx->psHandlerStack = psNode->psNext;
VSIFree(psNode);
}
}
/************************************************************************/
/* CPLSetCurrentErrorHandlerCatchDebug() */
/************************************************************************/
/**
* Set if the current error handler should intercept debug messages, or if
* they should be processed by the previous handler.
*
* By default when installing a custom error handler, this one intercepts
* debug messages. In some cases, this might not be desirable and the user
* would prefer that the previous installed handler (or the default one if no
* previous installed handler exists in the stack) deal with it. In which
* case, this function should be called with bCatchDebug = FALSE.
*
* @param bCatchDebug FALSE if the current error handler should not intercept
* debug messages
* @since GDAL 2.1
*/
void CPL_STDCALL CPLSetCurrentErrorHandlerCatchDebug(int bCatchDebug)
{
CPLErrorContext *psCtx = CPLGetErrorContext();
if (psCtx == nullptr || IS_PREFEFINED_ERROR_CTX(psCtx))
{
fprintf(stderr, "CPLSetCurrentErrorHandlerCatchDebug() failed.\n");
return;
}
if (psCtx->psHandlerStack != nullptr)
psCtx->psHandlerStack->bCatchDebug = CPL_TO_BOOL(bCatchDebug);
else
gbCatchDebug = CPL_TO_BOOL(bCatchDebug);
}
/************************************************************************/
/* _CPLAssert() */
/* */
/* This function is called only when an assertion fails. */
/************************************************************************/
/**
* Report failure of a logical assertion.
*
* Applications would normally use the CPLAssert() macro which expands
* into code calling _CPLAssert() only if the condition fails. _CPLAssert()
* will generate a CE_Fatal error call to CPLError(), indicating the file
* name, and line number of the failed assertion, as well as containing
* the assertion itself.
*
* There is no reason for application code to call _CPLAssert() directly.
*/
void CPL_STDCALL _CPLAssert(const char *pszExpression, const char *pszFile,
int iLine)
{
CPLError(CE_Fatal, CPLE_AssertionFailed,
"Assertion `%s' failed "
"in file `%s', line %d",
pszExpression, pszFile, iLine);
// Just to please compiler so it is aware the function does not return.
abort();
}
/************************************************************************/
/* CPLCleanupErrorMutex() */
/************************************************************************/
void CPLCleanupErrorMutex()
{
if (hErrorMutex != nullptr)
{
CPLDestroyMutex(hErrorMutex);
hErrorMutex = nullptr;
}
if (fpLog != nullptr && fpLog != stderr)
{
fclose(fpLog);
fpLog = nullptr;
bLogInit = false;
}
}
bool CPLIsDefaultErrorHandlerAndCatchDebug()
{
CPLErrorContext *psCtx = CPLGetErrorContext();
return (psCtx == nullptr || psCtx->psHandlerStack == nullptr) &&
gbCatchDebug && pfnErrorHandler == CPLDefaultErrorHandler;
}
/************************************************************************/
/* CPLErrorHandlerAccumulator() */
/************************************************************************/
static void CPL_STDCALL CPLErrorHandlerAccumulator(CPLErr eErr, CPLErrorNum no,
const char *msg)
{
std::vector<CPLErrorHandlerAccumulatorStruct> *paoErrors =
static_cast<std::vector<CPLErrorHandlerAccumulatorStruct> *>(
CPLGetErrorHandlerUserData());
paoErrors->push_back(CPLErrorHandlerAccumulatorStruct(eErr, no, msg));
}
void CPLInstallErrorHandlerAccumulator(
std::vector<CPLErrorHandlerAccumulatorStruct> &aoErrors)
{
CPLPushErrorHandlerEx(CPLErrorHandlerAccumulator, &aoErrors);
}
void CPLUninstallErrorHandlerAccumulator()
{
CPLPopErrorHandler();
}
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