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37 * Implements classes and functions in exceptions.h.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
40 * \ingroup module_utility
44 #include "exceptions.h"
54 #include <boost/shared_ptr.hpp>
55 #include <boost/exception/get_error_info.hpp>
57 #include "thread_mpi/system_error.h"
59 #include "gromacs/utility/basenetwork.h"
60 #include "gromacs/utility/errorcodes.h"
61 #include "gromacs/utility/gmxassert.h"
62 #include "gromacs/utility/stringutil.h"
63 #include "gromacs/utility/textwriter.h"
65 #include "errorformat.h"
73 /********************************************************************
78 * Error message or error context text item.
80 * Error messages for an exception are represented as a chain of ErrorMessage
81 * objects: the elements at the bottom of the chain (with no children) is the
82 * error message, and other elements are the context strings added.
84 * \ingroup module_utility
90 * Creates an error message object with the specified text.
92 * \param[in] text Text for the message.
94 explicit ErrorMessage(const std::string &text);
96 //! Whether this object is a context string.
97 bool isContext() const { return static_cast<bool>(child_); }
98 //! Returns the text for this object.
99 const std::string &text() const { return text_; }
101 * Returns the child object for a context object.
103 * Must not be called if isContext() returns false.
105 const ErrorMessage &child() const
107 GMX_ASSERT(isContext(),
108 "Attempting to access nonexistent message object");
113 * Creates a new message object with context prepended.
115 * \param[in] context Context string to add.
116 * \returns New error message object that has \p context as its text
117 * and \c this as its child.
118 * \throws std::bad_alloc if out of memory.
120 ErrorMessage prependContext(const std::string &context) const;
124 boost::shared_ptr<ErrorMessage> child_;
128 * Stores a reason or the top-most context string of an exception.
130 * \ingroup module_utility
132 typedef boost::error_info<struct errinfo_message_, ErrorMessage>
135 ErrorMessage::ErrorMessage(const std::string &text)
138 size_t length = text_.find_last_not_of(" \n");
139 if (length == std::string::npos)
141 length = text_.length() - 1;
143 text_.resize(length + 1);
147 ErrorMessage::prependContext(const std::string &context) const
149 ErrorMessage newMessage(context);
150 newMessage.child_.reset(new ErrorMessage(*this));
155 * Stores list of nested exceptions for Gromacs exceptions.
157 * \ingroup module_utility
159 typedef boost::error_info<struct errinfo_message_, internal::NestedExceptionList>
160 errinfo_nested_exceptions;
164 /********************************************************************
168 GromacsException::GromacsException(const ExceptionInitializer &details)
170 *this << errinfo_message(ErrorMessage(details.reason_));
171 if (details.hasNestedExceptions())
173 *this << errinfo_nested_exceptions(details.nested_);
177 const char *GromacsException::what() const throw()
179 const ErrorMessage *msg = boost::get_error_info<errinfo_message>(*this);
182 return "No reason provided";
184 while (msg->isContext())
188 return msg->text().c_str();
191 void GromacsException::prependContext(const std::string &context)
193 const ErrorMessage *msg = boost::get_error_info<errinfo_message>(*this);
194 GMX_RELEASE_ASSERT(msg != NULL, "Message should always be set");
195 *this << errinfo_message(msg->prependContext(context));
198 /********************************************************************
199 * Derived exception classes
202 int FileIOError::errorCode() const
207 int InvalidInputError::errorCode() const
209 return eeInvalidInput;
212 int InconsistentInputError::errorCode() const
214 return eeInconsistentInput;
217 int SimulationInstabilityError::errorCode() const
219 return eeInstability;
222 int InternalError::errorCode() const
224 return eeInternalError;
227 int APIError::errorCode() const
232 int NotImplementedError::errorCode() const
234 return eeNotImplemented;
238 /********************************************************************
245 //! \addtogroup module_utility
249 * Abstracts actual output from the other logic in exception formatting.
251 * Object that implements this interface is passed to
252 * formatExceptionMessageInternal(), and is responsible for composing the
253 * output. This allows using the same implementation of interpreting the
254 * exceptions while still supporting output to different formats (e.g., to a
255 * string or to \c stderr).
257 class MessageWriterInterface
260 virtual ~MessageWriterInterface() {}
263 * Writes a single line of text into the output.
265 * \param[in] text Text to write on the line.
266 * \param[in] indent Suggested number of spaces to indent the line.
268 virtual void writeLine(const char *text, int indent) = 0;
270 * Writes information about a system error (errno-based).
272 * \param[in] errorNumber errno value
273 * \param[in] funcName Name of the system call (can be NULL).
274 * \param[in] indent Suggested number of spaces to indent the output.
276 virtual void writeErrNoInfo(int errorNumber, const char *funcName,
281 * Exception information writer for cases where exceptions should be avoided.
283 * Formats the messages into the provided FILE handle without checking for
284 * errors in std::fprintf() calls.
286 class MessageWriterFileNoThrow : public MessageWriterInterface
289 //! Initializes a writer that writes to the given file handle.
290 explicit MessageWriterFileNoThrow(FILE *fp) : fp_(fp) {}
292 virtual void writeLine(const char *text, int indent)
294 internal::printFatalErrorMessageLine(fp_, text, indent);
296 virtual void writeErrNoInfo(int errorNumber, const char *funcName,
299 std::fprintf(fp_, "%*sReason: %s\n", indent, "",
300 std::strerror(errorNumber));
301 if (funcName != NULL)
303 std::fprintf(fp_, "%*s(call to %s() returned error code %d)\n",
304 indent, "", funcName, errorNumber);
313 * Exception information writer to format into a TextOutputStream.
315 class MessageWriterTextWriter : public MessageWriterInterface
318 //! Initializes a writer that writes to the given stream.
319 explicit MessageWriterTextWriter(TextWriter *writer) : writer_(writer)
323 virtual void writeLine(const char *text, int indent)
325 // TODO: Line wrapping.
326 writer_->writeString(std::string(indent, ' '));
327 writer_->writeLine(text);
329 virtual void writeErrNoInfo(int errorNumber, const char *funcName,
332 writeLine(formatString("Reason: %s", std::strerror(errorNumber)).c_str(),
334 if (funcName != NULL)
336 writeLine(formatString("(call to %s() returned error code %d)",
337 funcName, errorNumber).c_str(),
347 * Exception information writer to format into an std::string.
349 class MessageWriterString : public MessageWriterInterface
352 //! Post-processes the output string to not end in a line feed.
353 void removeTerminatingLineFeed()
355 if (result_.size() > 0U)
357 result_.erase(result_.size() - 1);
360 //! Returns the constructed string.
361 const std::string &result() const { return result_; }
363 virtual void writeLine(const char *text, int indent)
365 result_.append(indent, ' ');
366 result_.append(text);
367 result_.append("\n");
369 virtual void writeErrNoInfo(int errorNumber, const char *funcName,
372 writeLine(formatString("Reason: %s", std::strerror(errorNumber)).c_str(),
374 if (funcName != NULL)
376 writeLine(formatString("(call to %s() returned error code %d)",
377 funcName, errorNumber).c_str(),
387 * Prints error information for an exception object.
389 * \param[in] writer Writer to write out the information.
390 * \param[in] ex Exception object to print.
391 * \param[in] indent Indentation for the information.
393 * If the exception contains nested exceptions, information from them is
394 * recursively printed.
396 * Does not throw unless the writer throws.
398 void formatExceptionMessageInternal(MessageWriterInterface *writer,
399 const std::exception &ex, int indent)
401 const boost::exception *boostEx = dynamic_cast<const boost::exception *>(&ex);
404 // TODO: Add an option to print this information for the tests
405 // const char *const *funcPtr =
406 // boost::get_error_info<boost::throw_function>(*boostEx);
407 // const char *const *filePtr =
408 // boost::get_error_info<boost::throw_file>(*boostEx);
409 // const int *linePtr =
410 // boost::get_error_info<boost::throw_line>(*boostEx);
412 // std::string result;
413 // if (filePtr != NULL && linePtr != NULL)
415 // result = formatString("%s:%d: %s\n", *filePtr, *linePtr,
416 // funcPtr != NULL ? *funcPtr : "");
419 bool bAnythingWritten = false;
420 // TODO: Remove duplicate context if present in multiple nested exceptions.
421 const ErrorMessage *msg = boost::get_error_info<errinfo_message>(*boostEx);
424 while (msg != NULL && msg->isContext())
426 writer->writeLine(msg->text().c_str(), indent*2);
430 if (msg != NULL && !msg->text().empty())
432 writer->writeLine(msg->text().c_str(), indent*2);
433 bAnythingWritten = true;
438 writer->writeLine(ex.what(), indent*2);
439 bAnythingWritten = true;
442 const int *errorNumber
443 = boost::get_error_info<boost::errinfo_errno>(*boostEx);
444 if (errorNumber != NULL)
446 const char * const *funcName
447 = boost::get_error_info<boost::errinfo_api_function>(*boostEx);
448 writer->writeErrNoInfo(*errorNumber,
449 funcName != NULL ? *funcName : NULL,
451 bAnythingWritten = true;
454 // TODO: Treat also boost::nested_exception (not currently used, though)
456 const internal::NestedExceptionList *nested
457 = boost::get_error_info<errinfo_nested_exceptions>(*boostEx);
460 internal::NestedExceptionList::const_iterator ni;
461 for (ni = nested->begin(); ni != nested->end(); ++ni)
465 rethrow_exception(*ni);
467 catch (const std::exception &nestedEx)
469 const int newIndent = indent + (bAnythingWritten ? 1 : 0);
470 formatExceptionMessageInternal(writer, nestedEx, newIndent);
477 writer->writeLine(ex.what(), indent*2);
485 void printFatalErrorMessage(FILE *fp, const std::exception &ex)
487 const char *title = "Unknown exception";
488 bool bPrintType = false;
489 const GromacsException *gmxEx = dynamic_cast<const GromacsException *>(&ex);
490 // TODO: Treat more of the standard exceptions
493 title = getErrorCodeString(gmxEx->errorCode());
495 else if (dynamic_cast<const tMPI::system_error *>(&ex) != NULL)
497 title = "System error in thread synchronization";
499 else if (dynamic_cast<const std::bad_alloc *>(&ex) != NULL)
501 title = "Memory allocation failed";
503 else if (dynamic_cast<const std::logic_error *>(&ex) != NULL)
505 title = "Standard library logic error (bug)";
508 else if (dynamic_cast<const std::runtime_error *>(&ex) != NULL)
510 title = "Standard library runtime error (possible bug)";
517 // We can't call get_error_info directly on ex since our internal boost
518 // needs to be compiled with BOOST_NO_RTTI. So we do the dynamic_cast
520 const char *const *funcPtr = NULL;
521 const char *const *filePtr = NULL;
522 const int *linePtr = NULL;
523 const boost::exception *boostEx = dynamic_cast<const boost::exception *>(&ex);
526 funcPtr = boost::get_error_info<boost::throw_function>(*boostEx);
527 filePtr = boost::get_error_info<boost::throw_file>(*boostEx);
528 linePtr = boost::get_error_info<boost::throw_line>(*boostEx);
530 internal::printFatalErrorHeader(fp, title,
531 funcPtr != NULL ? *funcPtr : NULL,
532 filePtr != NULL ? *filePtr : NULL,
533 linePtr != NULL ? *linePtr : 0);
536 std::fprintf(fp, "(exception type: %s)\n", typeid(ex).name());
538 MessageWriterFileNoThrow writer(fp);
539 formatExceptionMessageInternal(&writer, ex, 0);
540 internal::printFatalErrorFooter(fp);
543 std::string formatExceptionMessageToString(const std::exception &ex)
545 MessageWriterString writer;
546 formatExceptionMessageInternal(&writer, ex, 0);
547 writer.removeTerminatingLineFeed();
548 return writer.result();
551 void formatExceptionMessageToFile(FILE *fp, const std::exception &ex)
553 MessageWriterFileNoThrow writer(fp);
554 formatExceptionMessageInternal(&writer, ex, 0);
557 void formatExceptionMessageToWriter(TextWriter *writer,
558 const std::exception &ex)
560 MessageWriterTextWriter messageWriter(writer);
561 formatExceptionMessageInternal(&messageWriter, ex, 0);
564 int processExceptionAtExit(const std::exception & /*ex*/)
568 // TODO: Consider moving the output done in gmx_abort() into the message
569 // printing routine above, so that this could become a simple MPI_Abort().
570 gmx_abort(returnCode);