fix github CI tests on windows

Summary:
These were [failing on github](https://github.com/facebook/folly/actions/runs/9923539772/job/27413784313#step:43:30071)

 * Fix use of regex in test in FsUtilTest.cpp
 * MSVC std::current_exception() exception_ptr return values are not comparable, was breaking ExceptionTest
 * Fix lookup of executable path on windows, which was breaking SSL test

X-link: facebook/folly#2256

Reviewed By: ndmitchell

Differential Revision: D59751594

Pulled By: ahornby

fbshipit-source-id: 6822abeb3ab73abd4643c2c680855f8f7ba61dbb

third-party/folly/src/folly/io/FsUtil.cpp

@@ -24,6 +24,10 @@
 #include <mach-o/dyld.h> // @manual
 #endif
 
+#if defined(_WIN32)
+#include <folly/portability/Windows.h>
+#endif
+
 namespace bsys = ::boost::system;
 
 namespace folly {
@@ -83,6 +87,10 @@ path executable_path() {
   auto data = const_cast<char*>(&*buf.data());
   _NSGetExecutablePath(data, &size);
   return path(std::move(buf));
+#elif defined(_WIN32)
+  WCHAR buf[MAX_PATH];
+  GetModuleFileNameW(NULL, buf, MAX_PATH);
+  return path(std::move(buf));
 #else
   return read_symlink("/proc/self/exe");
 #endif

third-party/folly/src/folly/io/test/FsUtilTest.cpp

@@ -26,6 +26,7 @@
 #include <folly/String.h>
 #include <folly/portability/GMock.h>
 #include <folly/portability/GTest.h>
+#include <folly/testing/TestUtil.h>
 
 using namespace folly;
 using namespace folly::fs;
@@ -100,23 +101,23 @@ TEST(Simple, UniquePath) {
   constexpr auto tags =
       std::array{"foo", "bar", "baz", "cat", "dog", "bat", "rat", "tar", "bar"};
   auto const model = join("-%%-", tags);
-  auto const match = testing::MatchesRegex(join("-[0-9a-f]{2}-", tags));
+  auto const pattern = join("-[0-9a-f]{2}-", tags);
   std::unordered_set<std::string> paths;
   for (size_t i = 0; i < size; ++i) {
     auto res = std_fs_unique_path(std_fs::path(model)).string();
-    EXPECT_THAT(res, match);
+    EXPECT_PCRE_MATCH(pattern, res);
     paths.insert(std::move(res));
   }
   EXPECT_EQ(size, paths.size());
 }
 
 TEST(Simple, UniquePathDefaultModel) {
   constexpr auto size = size_t(1) << 10;
-  auto const match = testing::MatchesRegex("([0-9a-f]{4}-){3}[0-9a-f]{4}");
+  auto const pattern = "([0-9a-f]{4}-){3}[0-9a-f]{4}";
   std::unordered_set<std::string> paths;
   for (size_t i = 0; i < size; ++i) {
     auto res = std_fs_unique_path().string();
-    EXPECT_THAT(res, match);
+    EXPECT_PCRE_MATCH(pattern, res);
     paths.insert(std::move(res));
   }
   EXPECT_EQ(size, paths.size());

third-party/folly/src/folly/lang/test/ExceptionTest.cpp

@@ -235,7 +235,16 @@ TEST_F(ExceptionTest, current_exception) {
     throw std::exception();
   } catch (...) {
     // primary exception?
+#if defined(_CPPLIB_VER)
+    // As per
+    // https://learn.microsoft.com/en-us/cpp/standard-library/exception-functions?view=msvc-170
+    // current_exception() returns a new value each time, so its not directly
+    // comparable on MSVC
+    EXPECT_NE(nullptr, std::current_exception());
+    EXPECT_NE(nullptr, folly::current_exception());
+#else
     EXPECT_EQ(std::current_exception(), folly::current_exception());
+#endif
   }
   try {
     throw std::exception();
@@ -244,7 +253,12 @@ TEST_F(ExceptionTest, current_exception) {
       throw;
     } catch (...) {
       // dependent exception?
+#if defined(_CPPLIB_VER)
+      EXPECT_NE(nullptr, std::current_exception());
+      EXPECT_NE(nullptr, folly::current_exception());
+#else
       EXPECT_EQ(std::current_exception(), folly::current_exception());
+#endif
     }
   }
 }