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- /*
- * Copyright 2013-present Facebook, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #include <folly/experimental/symbolizer/Symbolizer.h>
- #include <cstdlib>
- #include <folly/Range.h>
- #include <folly/String.h>
- #include <folly/portability/GTest.h>
- namespace folly {
- namespace symbolizer {
- namespace test {
- void foo() {}
- TEST(Symbolizer, Single) {
- Symbolizer symbolizer;
- SymbolizedFrame a;
- ASSERT_TRUE(symbolizer.symbolize(reinterpret_cast<uintptr_t>(foo), a));
- EXPECT_EQ("folly::symbolizer::test::foo()", a.demangledName());
- // The version of clang we use doesn't generate a `.debug_aranges` section,
- // which the symbolizer needs to lookup the filename.
- constexpr bool built_with_clang =
- #ifdef __clang__
- true;
- #else
- false;
- #endif
- if (!built_with_clang) {
- auto path = a.location.file.toString();
- folly::StringPiece basename(path);
- auto pos = basename.rfind('/');
- if (pos != folly::StringPiece::npos) {
- basename.advance(pos + 1);
- }
- EXPECT_EQ("SymbolizerTest.cpp", basename.str());
- }
- }
- FrameArray<100>* framesToFill{nullptr};
- int comparator(const void* ap, const void* bp) {
- getStackTrace(*framesToFill);
- int a = *static_cast<const int*>(ap);
- int b = *static_cast<const int*>(bp);
- return a < b ? -1 : a > b ? 1 : 0;
- }
- // Test stack frames...
- FOLLY_NOINLINE void bar();
- void bar(FrameArray<100>& frames) {
- framesToFill = &frames;
- int a[2] = {1, 2};
- // Use qsort, which is in a different library
- qsort(a, 2, sizeof(int), comparator);
- framesToFill = nullptr;
- }
- class ElfCacheTest : public testing::Test {
- protected:
- void SetUp() override;
- };
- // Capture "golden" stack trace with default-configured Symbolizer
- FrameArray<100> goldenFrames;
- void ElfCacheTest::SetUp() {
- bar(goldenFrames);
- Symbolizer symbolizer;
- symbolizer.symbolize(goldenFrames);
- // At least 3 stack frames from us + getStackTrace()
- ASSERT_LE(4, goldenFrames.frameCount);
- }
- void runElfCacheTest(Symbolizer& symbolizer) {
- FrameArray<100> frames = goldenFrames;
- for (size_t i = 0; i < frames.frameCount; ++i) {
- frames.frames[i].clear();
- }
- symbolizer.symbolize(frames);
- ASSERT_LE(4, frames.frameCount);
- for (size_t i = 1; i < 4; ++i) {
- EXPECT_STREQ(goldenFrames.frames[i].name, frames.frames[i].name);
- }
- }
- TEST_F(ElfCacheTest, TinyElfCache) {
- ElfCache cache(1);
- Symbolizer symbolizer(&cache);
- // Run twice, in case the wrong stuff gets evicted?
- for (size_t i = 0; i < 2; ++i) {
- runElfCacheTest(symbolizer);
- }
- }
- TEST_F(ElfCacheTest, SignalSafeElfCache) {
- SignalSafeElfCache cache(100);
- Symbolizer symbolizer(&cache);
- for (size_t i = 0; i < 2; ++i) {
- runElfCacheTest(symbolizer);
- }
- }
- TEST(SymbolizerTest, SymbolCache) {
- Symbolizer symbolizer(nullptr, Dwarf::LocationInfoMode::FULL, 100);
- FrameArray<100> frames;
- bar(frames);
- symbolizer.symbolize(frames);
- FrameArray<100> frames2;
- bar(frames2);
- symbolizer.symbolize(frames2);
- for (size_t i = 0; i < frames.frameCount; i++) {
- EXPECT_STREQ(frames.frames[i].name, frames2.frames[i].name);
- }
- }
- } // namespace test
- } // namespace symbolizer
- } // namespace folly
- // Can't use initFacebookLight since that would install its own signal handlers
- // Can't use initFacebookNoSignals since we cannot depend on common
- int main(int argc, char** argv) {
- ::testing::InitGoogleTest(&argc, argv);
- return RUN_ALL_TESTS();
- }
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