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Diffstat (limited to 'externals/breakpad/src/common/dwarf/dwarf2reader_splitfunctions_unittest.cc')
| -rw-r--r-- | externals/breakpad/src/common/dwarf/dwarf2reader_splitfunctions_unittest.cc | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/externals/breakpad/src/common/dwarf/dwarf2reader_splitfunctions_unittest.cc b/externals/breakpad/src/common/dwarf/dwarf2reader_splitfunctions_unittest.cc new file mode 100644 index 0000000000..12b27e6863 --- /dev/null +++ b/externals/breakpad/src/common/dwarf/dwarf2reader_splitfunctions_unittest.cc @@ -0,0 +1,129 @@ +// Copyright 2020 Google LLC +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google LLC nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Original author: Snehasish Kumar <snehasishk@google.com> + +// dwarf2reader_splitfunctions_unittest.cc: Unit tests for with a focus on debug +// information generated when with splitting optimizations such as +// -fsplit-machine-functions (clang) -freorder-blocks-and-partition (gcc). + +#ifdef HAVE_CONFIG_H +#include <config.h> // Must come first +#endif + +#include <stdint.h> +#include <stdlib.h> + +#include <string> + +#include "breakpad_googletest_includes.h" +#include "common/dwarf/bytereader.h" +#include "common/dwarf/dwarf2reader.h" +#include "google_breakpad/common/breakpad_types.h" + +using testing::_; +using namespace google_breakpad; + +namespace { + +class MockLineInfoHandler: public LineInfoHandler { + public: + MOCK_METHOD(void, DefineFile, (const string& name, int32_t file_num, + uint32_t dir_num, uint64_t mod_time, + uint64_t length), (override)); + MOCK_METHOD(void, AddLine, (uint64_t address, uint64_t length, + uint32_t file_num, uint32_t line_num, + uint32_t column_num), (override)); +}; + +struct LineProgram: public testing::Test { + MockLineInfoHandler handler_; +}; + +// The debug information is generated from the following program -- +// $ cat -n split_functions.c +// 1 #include <stdio.h> +// 2 +// 3 __attribute__((noinline)) int foo(int i) { +// 4 if (i % 100) { +// 5 return i + 1; +// 6 } else { +// 7 return i * 10 % 3; +// 8 } +// 9 } +// 10 +// 11 +// 12 int main(int argc, char *argv[]) { +// 13 int total = 0; +// 14 for (int i = 0; i < 1000; ++i) { +// 15 total += foo(i); +// 16 } +// 17 printf("%d\n", total); +// 18 } +// +// $ bin/clang -fprofile-generate -O2 split_functions.c +// $ ./a.out > /dev/null +// $ bin/llvm-profdata merge -o default.profdata default_*.profraw +// $ bin/clang -fprofile-use -O2 -gmlt -gdwarf-5 -fsplit-machine-functions \ +// split_functions.c -o split.out +// +// For the test we pick the first instruction in foo.cold which should be the +// else part of the function foo above. + +const uint8_t debug_line[] = { + 0xb0,0x0,0x0,0x0,0x5,0x0,0x8,0x0,0x37,0x0,0x0,0x0,0x1,0x1,0x1,0xfb,0xe,0xd,0x0,0x1,0x1,0x1,0x1,0x0,0x0,0x0,0x1,0x0,0x0,0x1,0x1,0x1,0x1f,0x1,0x0,0x0,0x0,0x0,0x3,0x1,0x1f,0x2,0xf,0x5,0x1e,0x1,0x3d,0x0,0x0,0x0,0x0,0x24,0xb2,0xb6,0xb5,0xbb,0xf,0xf7,0x6d,0x27,0x92,0xab,0x55,0x3a,0x29,0x48,0x81,0x4,0x0,0x0,0x9,0x2,0x40,0x10,0x40,0x0,0x0,0x0,0x0,0x0,0x14,0x5,0x9,0xa,0x2f,0x5,0x7,0x6,0x8,0x4a,0x5,0xe,0x6,0x67,0x5,0x1,0x40,0x5,0x0,0xf5,0x5,0xe,0xa,0xf5,0x5,0xb,0x6,0x74,0x5,0x1d,0x6,0x2d,0x5,0x15,0x6,0x3c,0x5,0x3,0x66,0x2,0x7,0x0,0x1,0x1,0x4,0x0,0x5,0xe,0x0,0x9,0x2,0x84,0x11,0x40,0x0,0x0,0x0,0x0,0x0,0x18,0x5,0x13,0x6,0x58,0x5,0x1,0x6,0x8,0xa0,0x2,0x1,0x0,0x1,0x1,0x4,0x0,0x5,0x3,0x0,0x9,0x2,0xa5,0x11,0x40,0x0,0x0,0x0,0x0,0x0,0x3,0x10,0x1,0x5,0x1,0xd7,0x2,0x9,0x0,0x1,0x1 +}; + +const uint8_t debug_str[] = { + 0x63,0x6c,0x61,0x6e,0x67,0x20,0x76,0x65,0x72,0x73,0x69,0x6f,0x6e,0x20,0x31,0x32,0x2e,0x30,0x2e,0x30,0x20,0x28,0x67,0x69,0x74,0x40,0x67,0x69,0x74,0x68,0x75,0x62,0x2e,0x63,0x6f,0x6d,0x3a,0x6c,0x6c,0x76,0x6d,0x2f,0x6c,0x6c,0x76,0x6d,0x2d,0x70,0x72,0x6f,0x6a,0x65,0x63,0x74,0x2e,0x67,0x69,0x74,0x20,0x63,0x37,0x35,0x61,0x30,0x61,0x31,0x65,0x39,0x64,0x63,0x32,0x39,0x62,0x65,0x34,0x65,0x30,0x30,0x64,0x33,0x37,0x64,0x30,0x64,0x30,0x30,0x32,0x38,0x38,0x61,0x66,0x63,0x31,0x61,0x36,0x31,0x35,0x33,0x66,0x29,0x0,0x73,0x70,0x6c,0x69,0x74,0x5f,0x66,0x75,0x6e,0x63,0x74,0x69,0x6f,0x6e,0x73,0x2e,0x63,0x0,0x2f,0x75,0x73,0x72,0x2f,0x6c,0x6f,0x63,0x61,0x6c,0x2f,0x67,0x6f,0x6f,0x67,0x6c,0x65,0x2f,0x68,0x6f,0x6d,0x65,0x2f,0x73,0x6e,0x65,0x68,0x61,0x73,0x69,0x73,0x68,0x6b,0x2f,0x77,0x6f,0x72,0x6b,0x69,0x6e,0x67,0x2f,0x6c,0x6c,0x76,0x6d,0x2d,0x70,0x72,0x6f,0x6a,0x65,0x63,0x74,0x2f,0x62,0x75,0x69,0x6c,0x64,0x0,0x66,0x6f,0x6f,0x0,0x69,0x6e,0x74,0x0,0x6d,0x61,0x69,0x6e,0x0,0x69,0x0,0x61,0x72,0x67,0x63,0x0,0x61,0x72,0x67,0x76,0x0,0x63,0x68,0x61,0x72,0x0,0x74,0x6f,0x74,0x61,0x6c,0x0 +}; + +const uint8_t debug_line_str[] = { + 0x2f,0x75,0x73,0x72,0x2f,0x6c,0x6f,0x63,0x61,0x6c,0x2f,0x67,0x6f,0x6f,0x67,0x6c,0x65,0x2f,0x68,0x6f,0x6d,0x65,0x2f,0x73,0x6e,0x65,0x68,0x61,0x73,0x69,0x73,0x68,0x6b,0x2f,0x77,0x6f,0x72,0x6b,0x69,0x6e,0x67,0x2f,0x6c,0x6c,0x76,0x6d,0x2d,0x70,0x72,0x6f,0x6a,0x65,0x63,0x74,0x2f,0x62,0x75,0x69,0x6c,0x64,0x0,0x73,0x70,0x6c,0x69,0x74,0x5f,0x66,0x75,0x6e,0x63,0x74,0x69,0x6f,0x6e,0x73,0x2e,0x63,0x0 +}; + +TEST_F(LineProgram, ReadLinesSplitFunctions) { + ByteReader byte_reader(ENDIANNESS_LITTLE); + // LineTables don't specify the offset size like Compilation Units do. + byte_reader.SetOffsetSize(4); + LineInfo line_reader(debug_line, + sizeof(debug_line), + &byte_reader, + debug_str, + sizeof(debug_str), + debug_line_str, + sizeof(debug_line_str), + &handler_); + EXPECT_CALL(handler_, DefineFile("split_functions.c", 0, 0, 0, 0)).Times(1); + EXPECT_CALL(handler_, AddLine(_, _, _, _, _)).Times(testing::AtLeast(1)); + // Pick the first address from the foo.cold symbol and check the line number. + EXPECT_CALL(handler_, AddLine(testing::Eq(0x401184lu), _, _, /*line_num*/ 7, _)).Times(1); + EXPECT_EQ(line_reader.Start(), sizeof(debug_line)); +} + +} // anonymous namespace |