Separate the creation of the Premature Exit File from supporting Death Tests.

The [Premature Exit File](https://google.github.io/googletest/advanced.html#detecting-test-premature-exit)
can be used for more than just death tests. Runners can use it to detect any
kind of unexpected exit.

Presently, its creation is tied to whether a platform supports Death
Tests. This change removes that coupling (though if Death Tests are supported,
then the Premature Exit file is implicitly supported).

PiperOrigin-RevId: 853416224
Change-Id: I5354730b82bc8a20981120f4e1df59b58cb31f6e

googletest/include/gtest/internal/gtest-port-arch.h

@@ -119,6 +119,8 @@
 #define GTEST_OS_NXP_QN9090 1
 #elif defined(NRF52)
 #define GTEST_OS_NRF52 1
+#elif defined(__EMSCRIPTEN__)
+#define GTEST_OS_EMSCRIPTEN 1
 #endif  // __CYGWIN__
 
 #endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_

googletest/include/gtest/internal/gtest-port.h

@@ -664,12 +664,22 @@ typedef struct _RTL_CRITICAL_SECTION GTEST_CRITICAL_SECTION;
      defined(GTEST_OS_NETBSD) || defined(GTEST_OS_FUCHSIA) ||         \
      defined(GTEST_OS_DRAGONFLY) || defined(GTEST_OS_GNU_KFREEBSD) || \
      defined(GTEST_OS_HAIKU) || defined(GTEST_OS_GNU_HURD))
+
 // Death tests require a file system to work properly.
 #if GTEST_HAS_FILE_SYSTEM
 #define GTEST_HAS_DEATH_TEST 1
 #endif  // GTEST_HAS_FILE_SYSTEM
 #endif
 
+// Determines whether the Premature Exit file can be created.
+// Created by default when Death tests are supported, but other platforms can
+// use the Premature exit file without Death test support (e.g. for detecting
+// crashes).
+#if GTEST_HAS_DEATH_TEST || \
+    (defined(GTEST_OS_EMSCRIPTEN) && GTEST_HAS_FILE_SYSTEM)
+#define GTEST_INTERNAL_HAS_PREMATURE_EXIT_FILE 1
+#endif
+
 // Determines whether to support type-driven tests.
 
 // Typed tests need <typeinfo> and variadic macros, which GCC, VC++ 8.0,

googletest/src/gtest.cc

@@ -5132,7 +5132,7 @@ void OsStackTraceGetter::UponLeavingGTest() GTEST_LOCK_EXCLUDED_(mutex_) {
 #endif  // GTEST_HAS_ABSL
 }
 
-#ifdef GTEST_HAS_DEATH_TEST
+#ifdef GTEST_INTERNAL_HAS_PREMATURE_EXIT_FILE
 // A helper class that creates the premature-exit file in its
 // constructor and deletes the file in its destructor.
 class ScopedPrematureExitFile {
@@ -5170,7 +5170,7 @@ class ScopedPrematureExitFile {
   ScopedPrematureExitFile(const ScopedPrematureExitFile&) = delete;
   ScopedPrematureExitFile& operator=(const ScopedPrematureExitFile&) = delete;
 };
-#endif  // GTEST_HAS_DEATH_TEST
+#endif  // GTEST_INTERNAL_HAS_PREMATURE_EXIT_FILE
 
 }  // namespace internal
 
@@ -5515,7 +5515,7 @@ void UnitTest::RecordProperty(const std::string& key,
 // We don't protect this under mutex_, as we only support calling it
 // from the main thread.
 int UnitTest::Run() {
-#ifdef GTEST_HAS_DEATH_TEST
+#ifdef GTEST_INTERNAL_HAS_PREMATURE_EXIT_FILE
   const bool in_death_test_child_process =
       !GTEST_FLAG_GET(internal_run_death_test).empty();
 
@@ -5546,7 +5546,7 @@ int UnitTest::Run() {
           : internal::posix::GetEnv("TEST_PREMATURE_EXIT_FILE"));
 #else
   const bool in_death_test_child_process = false;
-#endif  // GTEST_HAS_DEATH_TEST
+#endif  // GTEST_INTERNAL_HAS_PREMATURE_EXIT_FILE
 
   // Captures the value of GTEST_FLAG(catch_exceptions).  This value will be
   // used for the duration of the program.