2 * Copyright 2017 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <folly/experimental/symbolizer/Elf.h>
18 #include <folly/portability/GTest.h>
20 using folly::symbolizer::ElfFile;
22 // Add some symbols for testing. Note that we have to be careful with type
23 // signatures here to prevent name mangling
24 uint64_t kIntegerValue = 1234567890UL;
25 const char* kStringValue = "coconuts";
27 class ElfTest : public ::testing::Test {
29 // Path to the test binary itself; set by main()
30 static std::string binaryPath;
32 ElfTest() : elfFile_(binaryPath.c_str()) {}
33 ~ElfTest() override {}
39 std::string ElfTest::binaryPath;
41 TEST_F(ElfTest, IntegerValue) {
42 auto sym = elfFile_.getSymbolByName("kIntegerValue");
43 EXPECT_NE(nullptr, sym.first) << "Failed to look up symbol kIntegerValue";
44 EXPECT_EQ(kIntegerValue, elfFile_.getSymbolValue<uint64_t>(sym.second));
47 TEST_F(ElfTest, PointerValue) {
48 auto sym = elfFile_.getSymbolByName("kStringValue");
49 EXPECT_NE(nullptr, sym.first) << "Failed to look up symbol kStringValue";
50 ElfW(Addr) addr = elfFile_.getSymbolValue<ElfW(Addr)>(sym.second);
51 const char* str = &elfFile_.getAddressValue<const char>(addr);
52 EXPECT_STREQ(kStringValue, str);
55 TEST_F(ElfTest, iterateProgramHeaders) {
56 auto phdr = elfFile_.iterateProgramHeaders(
57 [](auto& h) { return h.p_type == PT_LOAD; });
58 EXPECT_NE(nullptr, phdr);
59 EXPECT_GE(phdr->p_filesz, 0);
62 int main(int argc, char** argv) {
63 testing::InitGoogleTest(&argc, argv);
64 gflags::ParseCommandLineFlags(&argc, &argv, true);
65 ElfTest::binaryPath = argv[0];
66 return RUN_ALL_TESTS();