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30 // Author: wan@google.com (Zhanyong Wan)
32 #include "gtest/internal/gtest-port.h"
39 #if GTEST_OS_WINDOWS_MOBILE
40 # include <windows.h> // For TerminateProcess()
41 #elif GTEST_OS_WINDOWS
43 # include <sys/stat.h>
46 #endif // GTEST_OS_WINDOWS_MOBILE
49 # include <mach/mach_init.h>
50 # include <mach/task.h>
51 # include <mach/vm_map.h>
52 #endif // GTEST_OS_MAC
54 #include "gtest/gtest-spi.h"
55 #include "gtest/gtest-message.h"
56 #include "gtest/internal/gtest-internal.h"
57 #include "gtest/internal/gtest-string.h"
59 // Indicates that this translation unit is part of Google Test's
60 // implementation. It must come before gtest-internal-inl.h is
61 // included, or there will be a compiler error. This trick is to
62 // prevent a user from accidentally including gtest-internal-inl.h in
64 #define GTEST_IMPLEMENTATION_ 1
65 #include "gtest/internal/gtest-internal-inl.h"
66 #undef GTEST_IMPLEMENTATION_
71 #if defined(_MSC_VER) || defined(__BORLANDC__)
72 // MSVC and C++Builder do not provide a definition of STDERR_FILENO.
73 const int kStdOutFileno = 1;
74 const int kStdErrFileno = 2;
76 const int kStdOutFileno = STDOUT_FILENO;
77 const int kStdErrFileno = STDERR_FILENO;
82 // Returns the number of threads running in the process, or 0 to indicate that
83 // we cannot detect it.
84 size_t GetThreadCount() {
85 const task_t task = mach_task_self();
86 mach_msg_type_number_t thread_count;
87 thread_act_array_t thread_list;
88 const kern_return_t status = task_threads(task, &thread_list, &thread_count);
89 if (status == KERN_SUCCESS) {
90 // task_threads allocates resources in thread_list and we need to free them
93 reinterpret_cast<vm_address_t>(thread_list),
94 sizeof(thread_t) * thread_count);
95 return static_cast<size_t>(thread_count);
103 size_t GetThreadCount() {
104 // There's no portable way to detect the number of threads, so we just
105 // return 0 to indicate that we cannot detect it.
109 #endif // GTEST_OS_MAC
111 #if GTEST_USES_POSIX_RE
113 // Implements RE. Currently only needed for death tests.
117 // regfree'ing an invalid regex might crash because the content
118 // of the regex is undefined. Since the regex's are essentially
119 // the same, one cannot be valid (or invalid) without the other
121 regfree(&partial_regex_);
122 regfree(&full_regex_);
124 free(const_cast<char*>(pattern_));
127 // Returns true iff regular expression re matches the entire str.
128 bool RE::FullMatch(const char* str, const RE& re) {
129 if (!re.is_valid_) return false;
132 return regexec(&re.full_regex_, str, 1, &match, 0) == 0;
135 // Returns true iff regular expression re matches a substring of str
136 // (including str itself).
137 bool RE::PartialMatch(const char* str, const RE& re) {
138 if (!re.is_valid_) return false;
141 return regexec(&re.partial_regex_, str, 1, &match, 0) == 0;
144 // Initializes an RE from its string representation.
145 void RE::Init(const char* regex) {
146 pattern_ = posix::StrDup(regex);
148 // Reserves enough bytes to hold the regular expression used for a
150 const size_t full_regex_len = strlen(regex) + 10;
151 char* const full_pattern = new char[full_regex_len];
153 snprintf(full_pattern, full_regex_len, "^(%s)$", regex);
154 is_valid_ = regcomp(&full_regex_, full_pattern, REG_EXTENDED) == 0;
155 // We want to call regcomp(&partial_regex_, ...) even if the
156 // previous expression returns false. Otherwise partial_regex_ may
157 // not be properly initialized can may cause trouble when it's
160 // Some implementation of POSIX regex (e.g. on at least some
161 // versions of Cygwin) doesn't accept the empty string as a valid
162 // regex. We change it to an equivalent form "()" to be safe.
164 const char* const partial_regex = (*regex == '\0') ? "()" : regex;
165 is_valid_ = regcomp(&partial_regex_, partial_regex, REG_EXTENDED) == 0;
167 EXPECT_TRUE(is_valid_)
168 << "Regular expression \"" << regex
169 << "\" is not a valid POSIX Extended regular expression.";
171 delete[] full_pattern;
174 #elif GTEST_USES_SIMPLE_RE
176 // Returns true iff ch appears anywhere in str (excluding the
177 // terminating '\0' character).
178 bool IsInSet(char ch, const char* str) {
179 return ch != '\0' && strchr(str, ch) != NULL;
182 // Returns true iff ch belongs to the given classification. Unlike
183 // similar functions in <ctype.h>, these aren't affected by the
185 bool IsAsciiDigit(char ch) { return '0' <= ch && ch <= '9'; }
186 bool IsAsciiPunct(char ch) {
187 return IsInSet(ch, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~");
189 bool IsRepeat(char ch) { return IsInSet(ch, "?*+"); }
190 bool IsAsciiWhiteSpace(char ch) { return IsInSet(ch, " \f\n\r\t\v"); }
191 bool IsAsciiWordChar(char ch) {
192 return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') ||
193 ('0' <= ch && ch <= '9') || ch == '_';
196 // Returns true iff "\\c" is a supported escape sequence.
197 bool IsValidEscape(char c) {
198 return (IsAsciiPunct(c) || IsInSet(c, "dDfnrsStvwW"));
201 // Returns true iff the given atom (specified by escaped and pattern)
202 // matches ch. The result is undefined if the atom is invalid.
203 bool AtomMatchesChar(bool escaped, char pattern_char, char ch) {
204 if (escaped) { // "\\p" where p is pattern_char.
205 switch (pattern_char) {
206 case 'd': return IsAsciiDigit(ch);
207 case 'D': return !IsAsciiDigit(ch);
208 case 'f': return ch == '\f';
209 case 'n': return ch == '\n';
210 case 'r': return ch == '\r';
211 case 's': return IsAsciiWhiteSpace(ch);
212 case 'S': return !IsAsciiWhiteSpace(ch);
213 case 't': return ch == '\t';
214 case 'v': return ch == '\v';
215 case 'w': return IsAsciiWordChar(ch);
216 case 'W': return !IsAsciiWordChar(ch);
218 return IsAsciiPunct(pattern_char) && pattern_char == ch;
221 return (pattern_char == '.' && ch != '\n') || pattern_char == ch;
224 // Helper function used by ValidateRegex() to format error messages.
225 String FormatRegexSyntaxError(const char* regex, int index) {
226 return (Message() << "Syntax error at index " << index
227 << " in simple regular expression \"" << regex << "\": ").GetString();
230 // Generates non-fatal failures and returns false if regex is invalid;
231 // otherwise returns true.
232 bool ValidateRegex(const char* regex) {
234 // TODO(wan@google.com): fix the source file location in the
235 // assertion failures to match where the regex is used in user
237 ADD_FAILURE() << "NULL is not a valid simple regular expression.";
241 bool is_valid = true;
243 // True iff ?, *, or + can follow the previous atom.
244 bool prev_repeatable = false;
245 for (int i = 0; regex[i]; i++) {
246 if (regex[i] == '\\') { // An escape sequence
248 if (regex[i] == '\0') {
249 ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
250 << "'\\' cannot appear at the end.";
254 if (!IsValidEscape(regex[i])) {
255 ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
256 << "invalid escape sequence \"\\" << regex[i] << "\".";
259 prev_repeatable = true;
260 } else { // Not an escape sequence.
261 const char ch = regex[i];
263 if (ch == '^' && i > 0) {
264 ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
265 << "'^' can only appear at the beginning.";
267 } else if (ch == '$' && regex[i + 1] != '\0') {
268 ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
269 << "'$' can only appear at the end.";
271 } else if (IsInSet(ch, "()[]{}|")) {
272 ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
273 << "'" << ch << "' is unsupported.";
275 } else if (IsRepeat(ch) && !prev_repeatable) {
276 ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
277 << "'" << ch << "' can only follow a repeatable token.";
281 prev_repeatable = !IsInSet(ch, "^$?*+");
288 // Matches a repeated regex atom followed by a valid simple regular
289 // expression. The regex atom is defined as c if escaped is false,
290 // or \c otherwise. repeat is the repetition meta character (?, *,
291 // or +). The behavior is undefined if str contains too many
292 // characters to be indexable by size_t, in which case the test will
293 // probably time out anyway. We are fine with this limitation as
294 // std::string has it too.
295 bool MatchRepetitionAndRegexAtHead(
296 bool escaped, char c, char repeat, const char* regex,
298 const size_t min_count = (repeat == '+') ? 1 : 0;
299 const size_t max_count = (repeat == '?') ? 1 :
300 static_cast<size_t>(-1) - 1;
301 // We cannot call numeric_limits::max() as it conflicts with the
302 // max() macro on Windows.
304 for (size_t i = 0; i <= max_count; ++i) {
305 // We know that the atom matches each of the first i characters in str.
306 if (i >= min_count && MatchRegexAtHead(regex, str + i)) {
307 // We have enough matches at the head, and the tail matches too.
308 // Since we only care about *whether* the pattern matches str
309 // (as opposed to *how* it matches), there is no need to find a
313 if (str[i] == '\0' || !AtomMatchesChar(escaped, c, str[i]))
319 // Returns true iff regex matches a prefix of str. regex must be a
320 // valid simple regular expression and not start with "^", or the
321 // result is undefined.
322 bool MatchRegexAtHead(const char* regex, const char* str) {
323 if (*regex == '\0') // An empty regex matches a prefix of anything.
326 // "$" only matches the end of a string. Note that regex being
327 // valid guarantees that there's nothing after "$" in it.
331 // Is the first thing in regex an escape sequence?
332 const bool escaped = *regex == '\\';
335 if (IsRepeat(regex[1])) {
336 // MatchRepetitionAndRegexAtHead() calls MatchRegexAtHead(), so
337 // here's an indirect recursion. It terminates as the regex gets
338 // shorter in each recursion.
339 return MatchRepetitionAndRegexAtHead(
340 escaped, regex[0], regex[1], regex + 2, str);
342 // regex isn't empty, isn't "$", and doesn't start with a
343 // repetition. We match the first atom of regex with the first
344 // character of str and recurse.
345 return (*str != '\0') && AtomMatchesChar(escaped, *regex, *str) &&
346 MatchRegexAtHead(regex + 1, str + 1);
350 // Returns true iff regex matches any substring of str. regex must be
351 // a valid simple regular expression, or the result is undefined.
353 // The algorithm is recursive, but the recursion depth doesn't exceed
354 // the regex length, so we won't need to worry about running out of
355 // stack space normally. In rare cases the time complexity can be
356 // exponential with respect to the regex length + the string length,
357 // but usually it's must faster (often close to linear).
358 bool MatchRegexAnywhere(const char* regex, const char* str) {
359 if (regex == NULL || str == NULL)
363 return MatchRegexAtHead(regex + 1, str);
365 // A successful match can be anywhere in str.
367 if (MatchRegexAtHead(regex, str))
369 } while (*str++ != '\0');
373 // Implements the RE class.
376 free(const_cast<char*>(pattern_));
377 free(const_cast<char*>(full_pattern_));
380 // Returns true iff regular expression re matches the entire str.
381 bool RE::FullMatch(const char* str, const RE& re) {
382 return re.is_valid_ && MatchRegexAnywhere(re.full_pattern_, str);
385 // Returns true iff regular expression re matches a substring of str
386 // (including str itself).
387 bool RE::PartialMatch(const char* str, const RE& re) {
388 return re.is_valid_ && MatchRegexAnywhere(re.pattern_, str);
391 // Initializes an RE from its string representation.
392 void RE::Init(const char* regex) {
393 pattern_ = full_pattern_ = NULL;
395 pattern_ = posix::StrDup(regex);
398 is_valid_ = ValidateRegex(regex);
400 // No need to calculate the full pattern when the regex is invalid.
404 const size_t len = strlen(regex);
405 // Reserves enough bytes to hold the regular expression used for a
406 // full match: we need space to prepend a '^', append a '$', and
407 // terminate the string with '\0'.
408 char* buffer = static_cast<char*>(malloc(len + 3));
409 full_pattern_ = buffer;
412 *buffer++ = '^'; // Makes sure full_pattern_ starts with '^'.
414 // We don't use snprintf or strncpy, as they trigger a warning when
415 // compiled with VC++ 8.0.
416 memcpy(buffer, regex, len);
419 if (len == 0 || regex[len - 1] != '$')
420 *buffer++ = '$'; // Makes sure full_pattern_ ends with '$'.
425 #endif // GTEST_USES_POSIX_RE
427 const char kUnknownFile[] = "unknown file";
429 // Formats a source file path and a line number as they would appear
430 // in an error message from the compiler used to compile this code.
431 GTEST_API_ ::std::string FormatFileLocation(const char* file, int line) {
432 const char* const file_name = file == NULL ? kUnknownFile : file;
435 return String::Format("%s:", file_name).c_str();
438 return String::Format("%s(%d):", file_name, line).c_str();
440 return String::Format("%s:%d:", file_name, line).c_str();
444 // Formats a file location for compiler-independent XML output.
445 // Although this function is not platform dependent, we put it next to
446 // FormatFileLocation in order to contrast the two functions.
447 // Note that FormatCompilerIndependentFileLocation() does NOT append colon
448 // to the file location it produces, unlike FormatFileLocation().
449 GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(
450 const char* file, int line) {
451 const char* const file_name = file == NULL ? kUnknownFile : file;
456 return String::Format("%s:%d", file_name, line).c_str();
460 GTestLog::GTestLog(GTestLogSeverity severity, const char* file, int line)
461 : severity_(severity) {
462 const char* const marker =
463 severity == GTEST_INFO ? "[ INFO ]" :
464 severity == GTEST_WARNING ? "[WARNING]" :
465 severity == GTEST_ERROR ? "[ ERROR ]" : "[ FATAL ]";
466 GetStream() << ::std::endl << marker << " "
467 << FormatFileLocation(file, line).c_str() << ": ";
470 // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
471 GTestLog::~GTestLog() {
472 GetStream() << ::std::endl;
473 if (severity_ == GTEST_FATAL) {
478 // Disable Microsoft deprecation warnings for POSIX functions called from
479 // this class (creat, dup, dup2, and close)
481 # pragma warning(push)
482 # pragma warning(disable: 4996)
485 #if GTEST_HAS_STREAM_REDIRECTION
487 // Object that captures an output stream (stdout/stderr).
488 class CapturedStream {
490 // The ctor redirects the stream to a temporary file.
491 CapturedStream(int fd) : fd_(fd), uncaptured_fd_(dup(fd)) {
493 # if GTEST_OS_WINDOWS
494 char temp_dir_path[MAX_PATH + 1] = { '\0' }; // NOLINT
495 char temp_file_path[MAX_PATH + 1] = { '\0' }; // NOLINT
497 ::GetTempPathA(sizeof(temp_dir_path), temp_dir_path);
498 const UINT success = ::GetTempFileNameA(temp_dir_path,
500 0, // Generate unique file name.
502 GTEST_CHECK_(success != 0)
503 << "Unable to create a temporary file in " << temp_dir_path;
504 const int captured_fd = creat(temp_file_path, _S_IREAD | _S_IWRITE);
505 GTEST_CHECK_(captured_fd != -1) << "Unable to open temporary file "
507 filename_ = temp_file_path;
508 #elif GTEST_OS_LINUX_ANDROID
509 char name_template[] = "/sdcard/captured_stderr.XXXXXX";
510 const int captured_fd = mkstemp(name_template);
511 filename_ = name_template;
513 // There's no guarantee that a test has write access to the
514 // current directory, so we create the temporary file in the /tmp
515 // directory instead.
516 char name_template[] = "/tmp/captured_stream.XXXXXX";
517 const int captured_fd = mkstemp(name_template);
518 filename_ = name_template;
519 # endif // GTEST_OS_WINDOWS
521 dup2(captured_fd, fd_);
526 remove(filename_.c_str());
529 String GetCapturedString() {
530 if (uncaptured_fd_ != -1) {
531 // Restores the original stream.
533 dup2(uncaptured_fd_, fd_);
534 close(uncaptured_fd_);
538 FILE* const file = posix::FOpen(filename_.c_str(), "r");
539 const String content = ReadEntireFile(file);
545 // Reads the entire content of a file as a String.
546 static String ReadEntireFile(FILE* file);
548 // Returns the size (in bytes) of a file.
549 static size_t GetFileSize(FILE* file);
551 const int fd_; // A stream to capture.
553 // Name of the temporary file holding the stderr output.
554 ::std::string filename_;
556 GTEST_DISALLOW_COPY_AND_ASSIGN_(CapturedStream);
559 // Returns the size (in bytes) of a file.
560 size_t CapturedStream::GetFileSize(FILE* file) {
561 fseek(file, 0, SEEK_END);
562 return static_cast<size_t>(ftell(file));
565 // Reads the entire content of a file as a string.
566 String CapturedStream::ReadEntireFile(FILE* file) {
567 const size_t file_size = GetFileSize(file);
568 char* const buffer = new char[file_size];
570 size_t bytes_last_read = 0; // # of bytes read in the last fread()
571 size_t bytes_read = 0; // # of bytes read so far
573 fseek(file, 0, SEEK_SET);
575 // Keeps reading the file until we cannot read further or the
576 // pre-determined file size is reached.
578 bytes_last_read = fread(buffer+bytes_read, 1, file_size-bytes_read, file);
579 bytes_read += bytes_last_read;
580 } while (bytes_last_read > 0 && bytes_read < file_size);
582 const String content(buffer, bytes_read);
589 # pragma warning(pop)
592 static CapturedStream* g_captured_stderr = NULL;
593 static CapturedStream* g_captured_stdout = NULL;
595 // Starts capturing an output stream (stdout/stderr).
596 void CaptureStream(int fd, const char* stream_name, CapturedStream** stream) {
597 if (*stream != NULL) {
598 GTEST_LOG_(FATAL) << "Only one " << stream_name
599 << " capturer can exist at a time.";
601 *stream = new CapturedStream(fd);
604 // Stops capturing the output stream and returns the captured string.
605 String GetCapturedStream(CapturedStream** captured_stream) {
606 const String content = (*captured_stream)->GetCapturedString();
608 delete *captured_stream;
609 *captured_stream = NULL;
614 // Starts capturing stdout.
615 void CaptureStdout() {
616 CaptureStream(kStdOutFileno, "stdout", &g_captured_stdout);
619 // Starts capturing stderr.
620 void CaptureStderr() {
621 CaptureStream(kStdErrFileno, "stderr", &g_captured_stderr);
624 // Stops capturing stdout and returns the captured string.
625 String GetCapturedStdout() { return GetCapturedStream(&g_captured_stdout); }
627 // Stops capturing stderr and returns the captured string.
628 String GetCapturedStderr() { return GetCapturedStream(&g_captured_stderr); }
630 #endif // GTEST_HAS_STREAM_REDIRECTION
632 #if GTEST_HAS_DEATH_TEST
634 // A copy of all command line arguments. Set by InitGoogleTest().
635 ::std::vector<String> g_argvs;
637 // Returns the command line as a vector of strings.
638 const ::std::vector<String>& GetArgvs() { return g_argvs; }
640 #endif // GTEST_HAS_DEATH_TEST
642 #if GTEST_OS_WINDOWS_MOBILE
646 TerminateProcess(GetCurrentProcess(), 1);
649 #endif // GTEST_OS_WINDOWS_MOBILE
651 // Returns the name of the environment variable corresponding to the
652 // given flag. For example, FlagToEnvVar("foo") will return
653 // "GTEST_FOO" in the open-source version.
654 static String FlagToEnvVar(const char* flag) {
655 const String full_flag =
656 (Message() << GTEST_FLAG_PREFIX_ << flag).GetString();
659 for (size_t i = 0; i != full_flag.length(); i++) {
660 env_var << ToUpper(full_flag.c_str()[i]);
663 return env_var.GetString();
666 // Parses 'str' for a 32-bit signed integer. If successful, writes
667 // the result to *value and returns true; otherwise leaves *value
668 // unchanged and returns false.
669 bool ParseInt32(const Message& src_text, const char* str, Int32* value) {
670 // Parses the environment variable as a decimal integer.
672 const long long_value = strtol(str, &end, 10); // NOLINT
674 // Has strtol() consumed all characters in the string?
676 // No - an invalid character was encountered.
678 msg << "WARNING: " << src_text
679 << " is expected to be a 32-bit integer, but actually"
680 << " has value \"" << str << "\".\n";
681 printf("%s", msg.GetString().c_str());
686 // Is the parsed value in the range of an Int32?
687 const Int32 result = static_cast<Int32>(long_value);
688 if (long_value == LONG_MAX || long_value == LONG_MIN ||
689 // The parsed value overflows as a long. (strtol() returns
690 // LONG_MAX or LONG_MIN when the input overflows.)
692 // The parsed value overflows as an Int32.
695 msg << "WARNING: " << src_text
696 << " is expected to be a 32-bit integer, but actually"
697 << " has value " << str << ", which overflows.\n";
698 printf("%s", msg.GetString().c_str());
707 // Reads and returns the Boolean environment variable corresponding to
708 // the given flag; if it's not set, returns default_value.
710 // The value is considered true iff it's not "0".
711 bool BoolFromGTestEnv(const char* flag, bool default_value) {
712 const String env_var = FlagToEnvVar(flag);
713 const char* const string_value = posix::GetEnv(env_var.c_str());
714 return string_value == NULL ?
715 default_value : strcmp(string_value, "0") != 0;
718 // Reads and returns a 32-bit integer stored in the environment
719 // variable corresponding to the given flag; if it isn't set or
720 // doesn't represent a valid 32-bit integer, returns default_value.
721 Int32 Int32FromGTestEnv(const char* flag, Int32 default_value) {
722 const String env_var = FlagToEnvVar(flag);
723 const char* const string_value = posix::GetEnv(env_var.c_str());
724 if (string_value == NULL) {
725 // The environment variable is not set.
726 return default_value;
729 Int32 result = default_value;
730 if (!ParseInt32(Message() << "Environment variable " << env_var,
731 string_value, &result)) {
732 printf("The default value %s is used.\n",
733 (Message() << default_value).GetString().c_str());
735 return default_value;
741 // Reads and returns the string environment variable corresponding to
742 // the given flag; if it's not set, returns default_value.
743 const char* StringFromGTestEnv(const char* flag, const char* default_value) {
744 const String env_var = FlagToEnvVar(flag);
745 const char* const value = posix::GetEnv(env_var.c_str());
746 return value == NULL ? default_value : value;
749 } // namespace internal
750 } // namespace testing