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Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/processor/stackwalker_x86_unittest.cc')
| -rw-r--r-- | toolkit/crashreporter/google-breakpad/src/processor/stackwalker_x86_unittest.cc | 2128 |
1 files changed, 0 insertions, 2128 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/processor/stackwalker_x86_unittest.cc b/toolkit/crashreporter/google-breakpad/src/processor/stackwalker_x86_unittest.cc deleted file mode 100644 index d4c61c8c4..000000000 --- a/toolkit/crashreporter/google-breakpad/src/processor/stackwalker_x86_unittest.cc +++ /dev/null @@ -1,2128 +0,0 @@ -// Copyright (c) 2010, Google Inc. -// All rights reserved. -// -// 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 Inc. 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: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> - -// stackwalker_x86_unittest.cc: Unit tests for StackwalkerX86 class. - -#include <string> -#include <vector> - -#include "breakpad_googletest_includes.h" -#include "common/test_assembler.h" -#include "common/using_std_string.h" -#include "google_breakpad/common/minidump_format.h" -#include "google_breakpad/processor/basic_source_line_resolver.h" -#include "google_breakpad/processor/call_stack.h" -#include "google_breakpad/processor/code_module.h" -#include "google_breakpad/processor/source_line_resolver_interface.h" -#include "google_breakpad/processor/stack_frame_cpu.h" -#include "processor/stackwalker_unittest_utils.h" -#include "processor/stackwalker_x86.h" -#include "processor/windows_frame_info.h" - -using google_breakpad::BasicSourceLineResolver; -using google_breakpad::CallStack; -using google_breakpad::CodeModule; -using google_breakpad::StackFrameSymbolizer; -using google_breakpad::StackFrame; -using google_breakpad::StackFrameX86; -using google_breakpad::Stackwalker; -using google_breakpad::StackwalkerX86; -using google_breakpad::SystemInfo; -using google_breakpad::WindowsFrameInfo; -using google_breakpad::test_assembler::kLittleEndian; -using google_breakpad::test_assembler::Label; -using google_breakpad::test_assembler::Section; -using std::vector; -using testing::_; -using testing::AnyNumber; -using testing::Return; -using testing::SetArgumentPointee; -using testing::Test; - -class StackwalkerX86Fixture { - public: - StackwalkerX86Fixture() - : stack_section(kLittleEndian), - // Give the two modules reasonable standard locations and names - // for tests to play with. - module1(0x40000000, 0x10000, "module1", "version1"), - module2(0x50000000, 0x10000, "module2", "version2"), - module3(0x771d0000, 0x180000, "module3", "version3"), - module4(0x75f90000, 0x46000, "module4", "version4"), - module5(0x75730000, 0x110000, "module5", "version5"), - module6(0x647f0000, 0x1ba8000, "module6", "version6") { - // Identify the system as a Linux system. - system_info.os = "Linux"; - system_info.os_short = "linux"; - system_info.os_version = "Salacious Skink"; - system_info.cpu = "x86"; - system_info.cpu_info = ""; - - // Put distinctive values in the raw CPU context. - BrandContext(&raw_context); - - // Create some modules with some stock debugging information. - modules.Add(&module1); - modules.Add(&module2); - modules.Add(&module3); - modules.Add(&module4); - modules.Add(&module5); - modules.Add(&module6); - - // By default, none of the modules have symbol info; call - // SetModuleSymbols to override this. - EXPECT_CALL(supplier, GetCStringSymbolData(_, _, _, _, _)) - .WillRepeatedly(Return(MockSymbolSupplier::NOT_FOUND)); - - // Avoid GMOCK WARNING "Uninteresting mock function call - returning - // directly" for FreeSymbolData(). - EXPECT_CALL(supplier, FreeSymbolData(_)).Times(AnyNumber()); - - // Reset max_frames_scanned since it's static. - Stackwalker::set_max_frames_scanned(1024); - } - - // Set the Breakpad symbol information that supplier should return for - // MODULE to INFO. - void SetModuleSymbols(MockCodeModule *module, const string &info) { - size_t buffer_size; - char *buffer = supplier.CopySymbolDataAndOwnTheCopy(info, &buffer_size); - EXPECT_CALL(supplier, GetCStringSymbolData(module, &system_info, _, _, _)) - .WillRepeatedly(DoAll(SetArgumentPointee<3>(buffer), - SetArgumentPointee<4>(buffer_size), - Return(MockSymbolSupplier::FOUND))); - } - - // Populate stack_region with the contents of stack_section. Use - // stack_section.start() as the region's starting address. - void RegionFromSection() { - string contents; - ASSERT_TRUE(stack_section.GetContents(&contents)); - stack_region.Init(stack_section.start().Value(), contents); - } - - // Fill RAW_CONTEXT with pseudo-random data, for round-trip checking. - void BrandContext(MDRawContextX86 *raw_context) { - uint8_t x = 173; - for (size_t i = 0; i < sizeof(*raw_context); i++) - reinterpret_cast<uint8_t *>(raw_context)[i] = (x += 17); - } - - SystemInfo system_info; - MDRawContextX86 raw_context; - Section stack_section; - MockMemoryRegion stack_region; - MockCodeModule module1; - MockCodeModule module2; - MockCodeModule module3; - MockCodeModule module4; - MockCodeModule module5; - MockCodeModule module6; - MockCodeModules modules; - MockSymbolSupplier supplier; - BasicSourceLineResolver resolver; - CallStack call_stack; - const vector<StackFrame *> *frames; -}; - -class SanityCheck: public StackwalkerX86Fixture, public Test { }; - -TEST_F(SanityCheck, NoResolver) { - stack_section.start() = 0x80000000; - stack_section.D32(0).D32(0); // end-of-stack marker - RegionFromSection(); - raw_context.eip = 0x40000200; - raw_context.ebp = 0x80000000; - - StackFrameSymbolizer frame_symbolizer(NULL, NULL); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - // This should succeed, even without a resolver or supplier. - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(1U, modules_without_symbols.size()); - ASSERT_EQ("module1", modules_without_symbols[0]->debug_file()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - StackFrameX86 *frame = static_cast<StackFrameX86 *>(frames->at(0)); - // Check that the values from the original raw context made it - // through to the context in the stack frame. - EXPECT_EQ(0, memcmp(&raw_context, &frame->context, sizeof(raw_context))); -} - -class GetContextFrame: public StackwalkerX86Fixture, public Test { }; - -TEST_F(GetContextFrame, Simple) { - stack_section.start() = 0x80000000; - stack_section.D32(0).D32(0); // end-of-stack marker - RegionFromSection(); - raw_context.eip = 0x40000200; - raw_context.ebp = 0x80000000; - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(1U, modules_without_symbols.size()); - ASSERT_EQ("module1", modules_without_symbols[0]->debug_file()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - StackFrameX86 *frame = static_cast<StackFrameX86 *>(frames->at(0)); - // Check that the values from the original raw context made it - // through to the context in the stack frame. - EXPECT_EQ(0, memcmp(&raw_context, &frame->context, sizeof(raw_context))); -} - -// The stackwalker should be able to produce the context frame even -// without stack memory present. -TEST_F(GetContextFrame, NoStackMemory) { - raw_context.eip = 0x40000200; - raw_context.ebp = 0x80000000; - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, NULL, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(1U, modules_without_symbols.size()); - ASSERT_EQ("module1", modules_without_symbols[0]->debug_file()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - StackFrameX86 *frame = static_cast<StackFrameX86 *>(frames->at(0)); - // Check that the values from the original raw context made it - // through to the context in the stack frame. - EXPECT_EQ(0, memcmp(&raw_context, &frame->context, sizeof(raw_context))); -} - -class GetCallerFrame: public StackwalkerX86Fixture, public Test { - protected: - void IPAddressIsNotInKnownModuleTestImpl(bool has_corrupt_symbols); -}; - -// Walk a traditional frame. A traditional frame saves the caller's -// %ebp just below the return address, and has its own %ebp pointing -// at the saved %ebp. -TEST_F(GetCallerFrame, Traditional) { - stack_section.start() = 0x80000000; - Label frame0_ebp, frame1_ebp; - stack_section - .Append(12, 0) // frame 0: space - .Mark(&frame0_ebp) // frame 0 %ebp points here - .D32(frame1_ebp) // frame 0: saved %ebp - .D32(0x40008679) // frame 0: return address - .Append(8, 0) // frame 1: space - .Mark(&frame1_ebp) // frame 1 %ebp points here - .D32(0) // frame 1: saved %ebp (stack end) - .D32(0); // frame 1: return address (stack end) - RegionFromSection(); - raw_context.eip = 0x4000c7a5; - raw_context.esp = stack_section.start().Value(); - raw_context.ebp = frame0_ebp.Value(); - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(1U, modules_without_symbols.size()); - ASSERT_EQ("module1", modules_without_symbols[0]->debug_file()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(2U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - EXPECT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x4000c7a5U, frame0->instruction); - EXPECT_EQ(0x4000c7a5U, frame0->context.eip); - EXPECT_EQ(frame0_ebp.Value(), frame0->context.ebp); - EXPECT_EQ(NULL, frame0->windows_frame_info); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_FP, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x40008679U, frame1->instruction + 1); - EXPECT_EQ(0x40008679U, frame1->context.eip); - EXPECT_EQ(frame1_ebp.Value(), frame1->context.ebp); - EXPECT_EQ(NULL, frame1->windows_frame_info); - } -} - -// Walk a traditional frame, but use a bogus %ebp value, forcing a scan -// of the stack for something that looks like a return address. -TEST_F(GetCallerFrame, TraditionalScan) { - stack_section.start() = 0x80000000; - Label frame1_ebp; - Label frame1_esp; - stack_section - // frame 0 - .D32(0xf065dc76) // locals area: - .D32(0x46ee2167) // garbage that doesn't look like - .D32(0xbab023ec) // a return address - .D32(frame1_ebp) // saved %ebp (%ebp fails to point here, forcing scan) - .D32(0x4000129d) // return address - // frame 1 - .Mark(&frame1_esp) - .Append(8, 0) // space - .Mark(&frame1_ebp) // %ebp points here - .D32(0) // saved %ebp (stack end) - .D32(0); // return address (stack end) - - RegionFromSection(); - raw_context.eip = 0x4000f49d; - raw_context.esp = stack_section.start().Value(); - // Make the frame pointer bogus, to make the stackwalker scan the stack - // for something that looks like a return address. - raw_context.ebp = 0xd43eed6e; - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(1U, modules_without_symbols.size()); - ASSERT_EQ("module1", modules_without_symbols[0]->debug_file()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(2U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x4000f49dU, frame0->instruction); - EXPECT_EQ(0x4000f49dU, frame0->context.eip); - EXPECT_EQ(stack_section.start().Value(), frame0->context.esp); - EXPECT_EQ(0xd43eed6eU, frame0->context.ebp); - EXPECT_EQ(NULL, frame0->windows_frame_info); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x4000129dU, frame1->instruction + 1); - EXPECT_EQ(0x4000129dU, frame1->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_EQ(frame1_ebp.Value(), frame1->context.ebp); - EXPECT_EQ(NULL, frame1->windows_frame_info); - } -} - -// Force scanning for a return address a long way down the stack -TEST_F(GetCallerFrame, TraditionalScanLongWay) { - stack_section.start() = 0x80000000; - Label frame1_ebp; - Label frame1_esp; - stack_section - // frame 0 - .D32(0xf065dc76) // locals area: - .D32(0x46ee2167) // garbage that doesn't look like - .D32(0xbab023ec) // a return address - .Append(20 * 4, 0) // a bunch of space - .D32(frame1_ebp) // saved %ebp (%ebp fails to point here, forcing scan) - .D32(0x4000129d) // return address - // frame 1 - .Mark(&frame1_esp) - .Append(8, 0) // space - .Mark(&frame1_ebp) // %ebp points here - .D32(0) // saved %ebp (stack end) - .D32(0); // return address (stack end) - - RegionFromSection(); - raw_context.eip = 0x4000f49d; - raw_context.esp = stack_section.start().Value(); - // Make the frame pointer bogus, to make the stackwalker scan the stack - // for something that looks like a return address. - raw_context.ebp = 0xd43eed6e; - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(1U, modules_without_symbols.size()); - ASSERT_EQ("module1", modules_without_symbols[0]->debug_file()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(2U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x4000f49dU, frame0->instruction); - EXPECT_EQ(0x4000f49dU, frame0->context.eip); - EXPECT_EQ(stack_section.start().Value(), frame0->context.esp); - EXPECT_EQ(0xd43eed6eU, frame0->context.ebp); - EXPECT_EQ(NULL, frame0->windows_frame_info); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x4000129dU, frame1->instruction + 1); - EXPECT_EQ(0x4000129dU, frame1->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_EQ(frame1_ebp.Value(), frame1->context.ebp); - EXPECT_EQ(NULL, frame1->windows_frame_info); - } -} - -// Test that set_max_frames_scanned prevents using stack scanning -// to find caller frames. -TEST_F(GetCallerFrame, ScanningNotAllowed) { - stack_section.start() = 0x80000000; - Label frame1_ebp; - stack_section - // frame 0 - .D32(0xf065dc76) // locals area: - .D32(0x46ee2167) // garbage that doesn't look like - .D32(0xbab023ec) // a return address - .D32(frame1_ebp) // saved %ebp (%ebp fails to point here, forcing scan) - .D32(0x4000129d) // return address - // frame 1 - .Append(8, 0) // space - .Mark(&frame1_ebp) // %ebp points here - .D32(0) // saved %ebp (stack end) - .D32(0); // return address (stack end) - - RegionFromSection(); - raw_context.eip = 0x4000f49d; - raw_context.esp = stack_section.start().Value(); - // Make the frame pointer bogus, to make the stackwalker scan the stack - // for something that looks like a return address. - raw_context.ebp = 0xd43eed6e; - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - Stackwalker::set_max_frames_scanned(0); - - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(1U, modules_without_symbols.size()); - ASSERT_EQ("module1", modules_without_symbols[0]->debug_file()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(1U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x4000f49dU, frame0->instruction); - EXPECT_EQ(0x4000f49dU, frame0->context.eip); - EXPECT_EQ(stack_section.start().Value(), frame0->context.esp); - EXPECT_EQ(0xd43eed6eU, frame0->context.ebp); - EXPECT_EQ(NULL, frame0->windows_frame_info); - } -} - -// Use Windows frame data (a "STACK WIN 4" record, from a -// FrameTypeFrameData DIA record) to walk a stack frame. -TEST_F(GetCallerFrame, WindowsFrameData) { - SetModuleSymbols(&module1, - "STACK WIN 4 aa85 176 0 0 4 10 4 0 1" - " $T2 $esp .cbSavedRegs + =" - " $T0 .raSearchStart =" - " $eip $T0 ^ =" - " $esp $T0 4 + =" - " $ebx $T2 4 - ^ =" - " $edi $T2 8 - ^ =" - " $esi $T2 12 - ^ =" - " $ebp $T2 16 - ^ =\n"); - Label frame1_esp, frame1_ebp; - stack_section.start() = 0x80000000; - stack_section - // frame 0 - .D32(frame1_ebp) // saved regs: %ebp - .D32(0xa7120d1a) // %esi - .D32(0x630891be) // %edi - .D32(0x9068a878) // %ebx - .D32(0xa08ea45f) // locals: unused - .D32(0x40001350) // return address - // frame 1 - .Mark(&frame1_esp) - .Append(12, 0) // empty space - .Mark(&frame1_ebp) - .D32(0) // saved %ebp (stack end) - .D32(0); // saved %eip (stack end) - - RegionFromSection(); - raw_context.eip = 0x4000aa85; - raw_context.esp = stack_section.start().Value(); - raw_context.ebp = 0xf052c1de; // should not be needed to walk frame - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(2U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x4000aa85U, frame0->instruction); - EXPECT_EQ(0x4000aa85U, frame0->context.eip); - EXPECT_EQ(stack_section.start().Value(), frame0->context.esp); - EXPECT_EQ(0xf052c1deU, frame0->context.ebp); - EXPECT_TRUE(frame0->windows_frame_info != NULL); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP - | StackFrameX86::CONTEXT_VALID_EBX - | StackFrameX86::CONTEXT_VALID_ESI - | StackFrameX86::CONTEXT_VALID_EDI), - frame1->context_validity); - EXPECT_EQ(0x40001350U, frame1->instruction + 1); - EXPECT_EQ(0x40001350U, frame1->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_EQ(frame1_ebp.Value(), frame1->context.ebp); - EXPECT_EQ(0x9068a878U, frame1->context.ebx); - EXPECT_EQ(0xa7120d1aU, frame1->context.esi); - EXPECT_EQ(0x630891beU, frame1->context.edi); - EXPECT_EQ(NULL, frame1->windows_frame_info); - } -} - -// Use Windows frame data (a "STACK WIN 4" record, from a -// FrameTypeFrameData DIA record) to walk a stack frame where the stack -// is aligned and we must search -TEST_F(GetCallerFrame, WindowsFrameDataAligned) { - SetModuleSymbols(&module1, - "STACK WIN 4 aa85 176 0 0 4 4 8 0 1" - " $T1 .raSearch =" - " $T0 $T1 4 - 8 @ =" - " $ebp $T1 4 - ^ =" - " $eip $T1 ^ =" - " $esp $T1 4 + ="); - Label frame0_esp, frame0_ebp; - Label frame1_esp, frame1_ebp; - stack_section.start() = 0x80000000; - stack_section - // frame 0 - .Mark(&frame0_esp) - .D32(0x0ffa0ffa) // unused saved register - .D32(0xdeaddead) // locals - .D32(0xbeefbeef) - .D32(0) // 8-byte alignment - .Mark(&frame0_ebp) - .D32(frame1_ebp) // saved %ebp - .D32(0x5000129d) // return address - // frame 1 - .Mark(&frame1_esp) - .D32(0x1) // parameter - .Mark(&frame1_ebp) - .D32(0) // saved %ebp (stack end) - .D32(0); // saved %eip (stack end) - - RegionFromSection(); - raw_context.eip = 0x4000aa85; - raw_context.esp = frame0_esp.Value(); - raw_context.ebp = frame0_ebp.Value(); - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(1U, modules_without_symbols.size()); - ASSERT_EQ("module2", modules_without_symbols[0]->debug_file()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(2U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x4000aa85U, frame0->instruction); - EXPECT_EQ(0x4000aa85U, frame0->context.eip); - EXPECT_EQ(frame0_esp.Value(), frame0->context.esp); - EXPECT_EQ(frame0_ebp.Value(), frame0->context.ebp); - EXPECT_TRUE(frame0->windows_frame_info != NULL); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x5000129dU, frame1->instruction + 1); - EXPECT_EQ(0x5000129dU, frame1->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_EQ(frame1_ebp.Value(), frame1->context.ebp); - EXPECT_EQ(NULL, frame1->windows_frame_info); - } -} - -// Use Windows frame data (a "STACK WIN 4" record, from a -// FrameTypeFrameData DIA record) to walk a frame, and depend on the -// parameter size from the callee as well. -TEST_F(GetCallerFrame, WindowsFrameDataParameterSize) { - SetModuleSymbols(&module1, "FUNC 1000 100 c module1::wheedle\n"); - SetModuleSymbols(&module2, - // Note bogus parameter size in FUNC record; the stack walker - // should prefer the STACK WIN record, and see '4' below. - "FUNC aa85 176 beef module2::whine\n" - "STACK WIN 4 aa85 176 0 0 4 10 4 0 1" - " $T2 $esp .cbLocals + .cbSavedRegs + =" - " $T0 .raSearchStart =" - " $eip $T0 ^ =" - " $esp $T0 4 + =" - " $ebp $T0 20 - ^ =" - " $ebx $T0 8 - ^ =\n"); - Label frame0_esp, frame0_ebp; - Label frame1_esp; - Label frame2_esp, frame2_ebp; - stack_section.start() = 0x80000000; - stack_section - // frame 0, in module1::wheedle. Traditional frame. - .Mark(&frame0_esp) - .Append(16, 0) // frame space - .Mark(&frame0_ebp) - .D32(0x6fa902e0) // saved %ebp. Not a frame pointer. - .D32(0x5000aa95) // return address, in module2::whine - // frame 1, in module2::whine. FrameData frame. - .Mark(&frame1_esp) - .D32(0xbaa0cb7a) // argument 3 passed to module1::wheedle - .D32(0xbdc92f9f) // argument 2 - .D32(0x0b1d8442) // argument 1 - .D32(frame2_ebp) // saved %ebp - .D32(0xb1b90a15) // unused - .D32(0xf18e072d) // unused - .D32(0x2558c7f3) // saved %ebx - .D32(0x0365e25e) // unused - .D32(0x2a179e38) // return address; $T0 points here - // frame 2, in no module - .Mark(&frame2_esp) - .Append(12, 0) // empty space - .Mark(&frame2_ebp) - .D32(0) // saved %ebp (stack end) - .D32(0); // saved %eip (stack end) - - RegionFromSection(); - raw_context.eip = 0x40001004; // in module1::wheedle - raw_context.esp = stack_section.start().Value(); - raw_context.ebp = frame0_ebp.Value(); - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(3U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x40001004U, frame0->instruction); - EXPECT_EQ(0x40001004U, frame0->context.eip); - EXPECT_EQ(frame0_esp.Value(), frame0->context.esp); - EXPECT_EQ(frame0_ebp.Value(), frame0->context.ebp); - EXPECT_EQ(&module1, frame0->module); - EXPECT_EQ("module1::wheedle", frame0->function_name); - EXPECT_EQ(0x40001000U, frame0->function_base); - // The FUNC record for module1::wheedle should have produced a - // WindowsFrameInfo structure with only the parameter size valid. - ASSERT_TRUE(frame0->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_PARAMETER_SIZE, - frame0->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_UNKNOWN, - frame0->windows_frame_info->type_); - EXPECT_EQ(12U, frame0->windows_frame_info->parameter_size); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_FP, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x5000aa95U, frame1->instruction + 1); - EXPECT_EQ(0x5000aa95U, frame1->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_EQ(0x6fa902e0U, frame1->context.ebp); - EXPECT_EQ(&module2, frame1->module); - EXPECT_EQ("module2::whine", frame1->function_name); - EXPECT_EQ(0x5000aa85U, frame1->function_base); - ASSERT_TRUE(frame1->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame1->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame1->windows_frame_info->type_); - // This should not see the 0xbeef parameter size from the FUNC - // record, but should instead see the STACK WIN record. - EXPECT_EQ(4U, frame1->windows_frame_info->parameter_size); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame2 = static_cast<StackFrameX86 *>(frames->at(2)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame2->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP - | StackFrameX86::CONTEXT_VALID_EBX), - frame2->context_validity); - EXPECT_EQ(0x2a179e38U, frame2->instruction + 1); - EXPECT_EQ(0x2a179e38U, frame2->context.eip); - EXPECT_EQ(frame2_esp.Value(), frame2->context.esp); - EXPECT_EQ(frame2_ebp.Value(), frame2->context.ebp); - EXPECT_EQ(0x2558c7f3U, frame2->context.ebx); - EXPECT_EQ(NULL, frame2->module); - EXPECT_EQ(NULL, frame2->windows_frame_info); - } -} - -// Use Windows frame data (a "STACK WIN 4" record, from a -// FrameTypeFrameData DIA record) to walk a stack frame, where the -// expression fails to yield both an $eip and an $ebp value, and the stack -// walker must scan. -TEST_F(GetCallerFrame, WindowsFrameDataScan) { - SetModuleSymbols(&module1, - "STACK WIN 4 c8c 111 0 0 4 10 4 0 1 bad program string\n"); - // Mark frame 1's PC as the end of the stack. - SetModuleSymbols(&module2, - "FUNC 7c38 accf 0 module2::function\n" - "STACK WIN 4 7c38 accf 0 0 4 10 4 0 1 $eip 0 = $ebp 0 =\n"); - Label frame1_esp; - stack_section.start() = 0x80000000; - stack_section - // frame 0 - .Append(16, 0x2a) // unused, garbage - .D32(0x50007ce9) // return address - // frame 1 - .Mark(&frame1_esp) - .Append(8, 0); // empty space - - RegionFromSection(); - raw_context.eip = 0x40000c9c; - raw_context.esp = stack_section.start().Value(); - raw_context.ebp = 0x2ae314cd; // should not be needed to walk frame - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(2U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x40000c9cU, frame0->instruction); - EXPECT_EQ(0x40000c9cU, frame0->context.eip); - EXPECT_EQ(stack_section.start().Value(), frame0->context.esp); - EXPECT_EQ(0x2ae314cdU, frame0->context.ebp); - EXPECT_TRUE(frame0->windows_frame_info != NULL); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame1->trust); - // I'd argue that CONTEXT_VALID_EBP shouldn't be here, since the walker - // does not actually fetch the EBP after a scan (forcing the next frame - // to be scanned as well). But let's grandfather the existing behavior in - // for now. - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x50007ce9U, frame1->instruction + 1); - EXPECT_EQ(0x50007ce9U, frame1->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_TRUE(frame1->windows_frame_info != NULL); - } -} - -// Use Windows frame data (a "STACK WIN 4" record, from a -// FrameTypeFrameData DIA record) to walk a stack frame, where the -// expression yields an $eip that falls outside of any module, and the -// stack walker must scan. -TEST_F(GetCallerFrame, WindowsFrameDataBadEIPScan) { - SetModuleSymbols(&module1, - "STACK WIN 4 6e6 e7 0 0 0 8 4 0 1" - // A traditional frame, actually. - " $eip $ebp 4 + ^ = $esp $ebp 8 + = $ebp $ebp ^ =\n"); - // Mark frame 1's PC as the end of the stack. - SetModuleSymbols(&module2, - "FUNC cfdb 8406 0 module2::function\n" - "STACK WIN 4 cfdb 8406 0 0 0 0 0 0 1 $eip 0 = $ebp 0 =\n"); - stack_section.start() = 0x80000000; - - // In this stack, the context's %ebp is pointing at the wrong place, so - // the stack walker needs to scan to find the return address, and then - // scan again to find the caller's saved %ebp. - Label frame0_ebp, frame1_ebp, frame1_esp; - stack_section - // frame 0 - .Append(8, 0x2a) // garbage - .Mark(&frame0_ebp) // frame 0 %ebp points here, but should point - // at *** below - // The STACK WIN record says that the following two values are - // frame 1's saved %ebp and return address, but the %ebp is wrong; - // they're garbage. The stack walker will scan for the right values. - .D32(0x3d937b2b) // alleged to be frame 1's saved %ebp - .D32(0x17847f5b) // alleged to be frame 1's return address - .D32(frame1_ebp) // frame 1's real saved %ebp; scan will find - .D32(0x2b2b2b2b) // first word of realigned register save area - // *** frame 0 %ebp ought to be pointing here - .D32(0x2c2c2c2c) // realigned locals area - .D32(0x5000d000) // frame 1's real saved %eip; scan will find - // Frame 1, in module2::function. The STACK WIN record describes - // this as the oldest frame, without referring to its contents, so - // we needn't to provide any actual data here. - .Mark(&frame1_esp) - .Mark(&frame1_ebp) // frame 1 %ebp points here - // A dummy value for frame 1's %ebp to point at. The scan recognizes the - // saved %ebp because it points to a valid word in the stack memory region. - .D32(0x2d2d2d2d); - - RegionFromSection(); - raw_context.eip = 0x40000700; - raw_context.esp = stack_section.start().Value(); - raw_context.ebp = frame0_ebp.Value(); - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(2U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x40000700U, frame0->instruction); - EXPECT_EQ(0x40000700U, frame0->context.eip); - EXPECT_EQ(stack_section.start().Value(), frame0->context.esp); - EXPECT_EQ(frame0_ebp.Value(), frame0->context.ebp); - EXPECT_TRUE(frame0->windows_frame_info != NULL); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI_SCAN, frame1->trust); - // I'd argue that CONTEXT_VALID_EBP shouldn't be here, since the - // walker does not actually fetch the EBP after a scan (forcing the - // next frame to be scanned as well). But let's grandfather the existing - // behavior in for now. - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x5000d000U, frame1->instruction + 1); - EXPECT_EQ(0x5000d000U, frame1->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_EQ(frame1_ebp.Value(), frame1->context.ebp); - EXPECT_TRUE(frame1->windows_frame_info != NULL); - } -} - -// Use Windows FrameTypeFPO data to walk a stack frame for a function that -// does not modify %ebp from the value it had in the caller. -TEST_F(GetCallerFrame, WindowsFPOUnchangedEBP) { - SetModuleSymbols(&module1, - // Note bogus parameter size in FUNC record; the walker - // should prefer the STACK WIN record, and see the '8' below. - "FUNC e8a8 100 feeb module1::discombobulated\n" - "STACK WIN 0 e8a8 100 0 0 8 4 10 0 0 0\n"); - Label frame0_esp; - Label frame1_esp, frame1_ebp; - stack_section.start() = 0x80000000; - stack_section - // frame 0, in module1::wheedle. FrameTypeFPO (STACK WIN 0) frame. - .Mark(&frame0_esp) - // no outgoing parameters; this is the youngest frame. - .D32(0x7c521352) // four bytes of saved registers - .Append(0x10, 0x42) // local area - .D32(0x40009b5b) // return address, in module1, no function - // frame 1, in module1, no function. - .Mark(&frame1_esp) - .D32(0xf60ea7fc) // junk - .Mark(&frame1_ebp) - .D32(0) // saved %ebp (stack end) - .D32(0); // saved %eip (stack end) - - RegionFromSection(); - raw_context.eip = 0x4000e8b8; // in module1::whine - raw_context.esp = stack_section.start().Value(); - // Frame pointer unchanged from caller. - raw_context.ebp = frame1_ebp.Value(); - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(2U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x4000e8b8U, frame0->instruction); - EXPECT_EQ(0x4000e8b8U, frame0->context.eip); - EXPECT_EQ(frame0_esp.Value(), frame0->context.esp); - // unchanged from caller - EXPECT_EQ(frame1_ebp.Value(), frame0->context.ebp); - EXPECT_EQ(&module1, frame0->module); - EXPECT_EQ("module1::discombobulated", frame0->function_name); - EXPECT_EQ(0x4000e8a8U, frame0->function_base); - // The STACK WIN record for module1::discombobulated should have - // produced a fully populated WindowsFrameInfo structure. - ASSERT_TRUE(frame0->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame0->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FPO, - frame0->windows_frame_info->type_); - EXPECT_EQ(0x10U, frame0->windows_frame_info->local_size); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x40009b5bU, frame1->instruction + 1); - EXPECT_EQ(0x40009b5bU, frame1->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_EQ(frame1_ebp.Value(), frame1->context.ebp); - EXPECT_EQ(&module1, frame1->module); - EXPECT_EQ("", frame1->function_name); - EXPECT_EQ(NULL, frame1->windows_frame_info); - } -} - -// Use Windows FrameTypeFPO data to walk a stack frame for a function -// that uses %ebp for its own purposes, saving the value it had in the -// caller in the standard place in the saved register area. -TEST_F(GetCallerFrame, WindowsFPOUsedEBP) { - SetModuleSymbols(&module1, - // Note bogus parameter size in FUNC record; the walker - // should prefer the STACK WIN record, and see the '8' below. - "FUNC 9aa8 e6 abbe module1::RaisedByTheAliens\n" - "STACK WIN 0 9aa8 e6 a 0 10 8 4 0 0 1\n"); - Label frame0_esp; - Label frame1_esp, frame1_ebp; - stack_section.start() = 0x80000000; - stack_section - // frame 0, in module1::wheedle. FrameTypeFPO (STACK WIN 0) frame. - .Mark(&frame0_esp) - // no outgoing parameters; this is the youngest frame. - .D32(frame1_ebp) // saved register area: saved %ebp - .D32(0xb68bd5f9) // saved register area: something else - .D32(0xd25d05fc) // local area - .D32(0x4000debe) // return address, in module1, no function - // frame 1, in module1, no function. - .Mark(&frame1_esp) - .D32(0xf0c9a974) // junk - .Mark(&frame1_ebp) - .D32(0) // saved %ebp (stack end) - .D32(0); // saved %eip (stack end) - - RegionFromSection(); - raw_context.eip = 0x40009ab8; // in module1::RaisedByTheAliens - raw_context.esp = stack_section.start().Value(); - // RaisedByTheAliens uses %ebp for its own mysterious purposes. - raw_context.ebp = 0xecbdd1a5; - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(2U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x40009ab8U, frame0->instruction); - EXPECT_EQ(0x40009ab8U, frame0->context.eip); - EXPECT_EQ(frame0_esp.Value(), frame0->context.esp); - EXPECT_EQ(0xecbdd1a5, frame0->context.ebp); - EXPECT_EQ(&module1, frame0->module); - EXPECT_EQ("module1::RaisedByTheAliens", frame0->function_name); - EXPECT_EQ(0x40009aa8U, frame0->function_base); - // The STACK WIN record for module1::RaisedByTheAliens should have - // produced a fully populated WindowsFrameInfo structure. - ASSERT_TRUE(frame0->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame0->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FPO, - frame0->windows_frame_info->type_); - EXPECT_EQ("", frame0->windows_frame_info->program_string); - EXPECT_TRUE(frame0->windows_frame_info->allocates_base_pointer); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x4000debeU, frame1->instruction + 1); - EXPECT_EQ(0x4000debeU, frame1->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_EQ(frame1_ebp.Value(), frame1->context.ebp); - EXPECT_EQ(&module1, frame1->module); - EXPECT_EQ("", frame1->function_name); - EXPECT_EQ(NULL, frame1->windows_frame_info); - } -} - -// This is a regression unit test which covers a bug which has to do with -// FPO-optimized Windows system call stubs in the context frame. There is -// a more recent Windows system call dispatch mechanism which differs from -// the one which is being tested here. The newer system call dispatch -// mechanism creates an extra context frame (KiFastSystemCallRet). -TEST_F(GetCallerFrame, WindowsFPOSystemCall) { - SetModuleSymbols(&module3, // ntdll.dll - "PUBLIC 1f8ac c ZwWaitForSingleObject\n" - "STACK WIN 0 1f8ac 1b 0 0 c 0 0 0 0 0\n"); - SetModuleSymbols(&module4, // kernelbase.dll - "PUBLIC 109f9 c WaitForSingleObjectEx\n" - "PUBLIC 36590 0 _except_handler4\n" - "STACK WIN 4 109f9 df c 0 c c 48 0 1 $T0 $ebp = $eip " - "$T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + = $L " - "$T0 .cbSavedRegs - = $P $T0 8 + .cbParams + =\n" - "STACK WIN 4 36590 154 17 0 10 0 14 0 1 $T0 $ebp = $eip " - "$T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + = $L $T0 " - ".cbSavedRegs - = $P $T0 8 + .cbParams + =\n"); - SetModuleSymbols(&module5, // kernel32.dll - "PUBLIC 11136 8 WaitForSingleObject\n" - "PUBLIC 11151 c WaitForSingleObjectExImplementation\n" - "STACK WIN 4 11136 16 5 0 8 0 0 0 1 $T0 $ebp = $eip " - "$T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + = $L " - "$T0 .cbSavedRegs - = $P $T0 8 + .cbParams + =\n" - "STACK WIN 4 11151 7a 5 0 c 0 0 0 1 $T0 $ebp = $eip " - "$T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + = $L " - "$T0 .cbSavedRegs - = $P $T0 8 + .cbParams + =\n"); - SetModuleSymbols(&module6, // chrome.dll - "FILE 7038 some_file_name.h\n" - "FILE 839776 some_file_name.cc\n" - "FUNC 217fda 17 4 function_217fda\n" - "217fda 4 102 839776\n" - "FUNC 217ff1 a 4 function_217ff1\n" - "217ff1 0 594 7038\n" - "217ff1 a 596 7038\n" - "STACK WIN 0 217ff1 a 0 0 4 0 0 0 0 0\n"); - - Label frame0_esp, frame1_esp; - Label frame1_ebp, frame2_ebp, frame3_ebp; - stack_section.start() = 0x002ff290; - stack_section - .Mark(&frame0_esp) - .D32(0x771ef8c1) // EIP in frame 0 (system call) - .D32(0x75fa0a91) // return address of frame 0 - .Mark(&frame1_esp) - .D32(0x000017b0) // args to child - .D32(0x00000000) - .D32(0x002ff2d8) - .D32(0x88014a2e) - .D32(0x002ff364) - .D32(0x000017b0) - .D32(0x00000000) - .D32(0x00000024) - .D32(0x00000001) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x9e3b9800) - .D32(0xfffffff7) - .D32(0x00000000) - .D32(0x002ff2a4) - .D32(0x64a07ff1) // random value to be confused with a return address - .D32(0x002ff8dc) - .D32(0x75fc6590) // random value to be confused with a return address - .D32(0xfdd2c6ea) - .D32(0x00000000) - .Mark(&frame1_ebp) - .D32(frame2_ebp) // Child EBP - .D32(0x75741194) // return address of frame 1 - .D32(0x000017b0) // args to child - .D32(0x0036ee80) - .D32(0x00000000) - .D32(0x65bc7d14) - .Mark(&frame2_ebp) - .D32(frame3_ebp) // Child EBP - .D32(0x75741148) // return address of frame 2 - .D32(0x000017b0) // args to child - .D32(0x0036ee80) - .D32(0x00000000) - .Mark(&frame3_ebp) - .D32(0) // saved %ebp (stack end) - .D32(0); // saved %eip (stack end) - - RegionFromSection(); - raw_context.eip = 0x771ef8c1; // in ntdll::ZwWaitForSingleObject - raw_context.esp = stack_section.start().Value(); - ASSERT_TRUE(raw_context.esp == frame0_esp.Value()); - raw_context.ebp = frame1_ebp.Value(); - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - - ASSERT_EQ(4U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x771ef8c1U, frame0->instruction); - EXPECT_EQ(0x771ef8c1U, frame0->context.eip); - EXPECT_EQ(frame0_esp.Value(), frame0->context.esp); - EXPECT_EQ(frame1_ebp.Value(), frame0->context.ebp); - EXPECT_EQ(&module3, frame0->module); - EXPECT_EQ("ZwWaitForSingleObject", frame0->function_name); - // The STACK WIN record for module3!ZwWaitForSingleObject should have - // produced a fully populated WindowsFrameInfo structure. - ASSERT_TRUE(frame0->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame0->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FPO, - frame0->windows_frame_info->type_); - EXPECT_EQ("", frame0->windows_frame_info->program_string); - EXPECT_FALSE(frame0->windows_frame_info->allocates_base_pointer); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP - | StackFrameX86::CONTEXT_VALID_ESP - | StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x75fa0a91U, frame1->instruction + 1); - EXPECT_EQ(0x75fa0a91U, frame1->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_EQ(frame1_ebp.Value(), frame1->context.ebp); - EXPECT_EQ(&module4, frame1->module); - EXPECT_EQ("WaitForSingleObjectEx", frame1->function_name); - // The STACK WIN record for module4!WaitForSingleObjectEx should have - // produced a fully populated WindowsFrameInfo structure. - ASSERT_TRUE(frame1->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame1->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame1->windows_frame_info->type_); - EXPECT_EQ("$T0 $ebp = $eip $T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + = $L " - "$T0 .cbSavedRegs - = $P $T0 8 + .cbParams + =", - frame1->windows_frame_info->program_string); - EXPECT_FALSE(frame1->windows_frame_info->allocates_base_pointer); - } -} - -// Scan the stack for a better return address and potentially skip frames -// when the calculated return address is not in a known module. Note, that -// the span of this scan is somewhat arbitrarily limited to 160 search words -// for the context frame and 40 search words (pointers) for the other frames: -// const int kRASearchWords = 40; -// This means that frames can be skipped only when their size is relatively -// small: smaller than 4 * kRASearchWords * sizeof(InstructionType) -TEST_F(GetCallerFrame, ReturnAddressIsNotInKnownModule) { - MockCodeModule msvcrt_dll(0x77be0000, 0x58000, "msvcrt.dll", "version1"); - SetModuleSymbols(&msvcrt_dll, // msvcrt.dll - "PUBLIC 38180 0 wcsstr\n" - "STACK WIN 4 38180 61 10 0 8 0 0 0 1 $T0 $ebp = $eip $T0 " - "4 + ^ = $ebp $T0 ^ = $esp $T0 8 + = $L $T0 .cbSavedRegs " - "- = $P $T0 4 + .cbParams + =\n"); - - MockCodeModule kernel32_dll(0x7c800000, 0x103000, "kernel32.dll", "version1"); - SetModuleSymbols(&kernel32_dll, // kernel32.dll - "PUBLIC efda 8 FindNextFileW\n" - "STACK WIN 4 efda 1bb c 0 8 8 3c 0 1 $T0 $ebp = $eip $T0 " - "4 + ^ = $ebp $T0 ^ = $esp $T0 8 + = $L $T0 .cbSavedRegs " - "- = $P $T0 4 + .cbParams + =\n"); - - MockCodeModule chrome_dll(0x1c30000, 0x28C8000, "chrome.dll", "version1"); - SetModuleSymbols(&chrome_dll, // chrome.dll - "FUNC e3cff 4af 0 file_util::FileEnumerator::Next()\n" - "e3cff 1a 711 2505\n" - "STACK WIN 4 e3cff 4af 20 0 4 c 94 0 1 $T1 .raSearch = " - "$T0 $T1 4 - 8 @ = $ebp $T1 4 - ^ = $eip $T1 ^ = $esp " - "$T1 4 + = $20 $T0 152 - ^ = $23 $T0 156 - ^ = $24 " - "$T0 160 - ^ =\n"); - - // Create some modules with some stock debugging information. - MockCodeModules local_modules; - local_modules.Add(&msvcrt_dll); - local_modules.Add(&kernel32_dll); - local_modules.Add(&chrome_dll); - - Label frame0_esp; - Label frame0_ebp; - Label frame1_ebp; - Label frame2_ebp; - Label frame3_ebp; - - stack_section.start() = 0x0932f2d0; - stack_section - .Mark(&frame0_esp) - .D32(0x0764e000) - .D32(0x0764e068) - .Mark(&frame0_ebp) - .D32(frame1_ebp) // Child EBP - .D32(0x001767a0) // return address of frame 0 - // Not in known module - .D32(0x0764e0c6) - .D32(0x001bb1b8) - .D32(0x0764e068) - .D32(0x00000003) - .D32(0x0764e068) - .D32(0x00000003) - .D32(0x07578828) - .D32(0x0764e000) - .D32(0x00000000) - .D32(0x001c0010) - .D32(0x0764e0c6) - .Mark(&frame1_ebp) - .D32(frame2_ebp) // Child EBP - .D32(0x7c80f10f) // return address of frame 1 - // inside kernel32!FindNextFileW - .D32(0x000008f8) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x0932f34c) - .D32(0x0764e000) - .D32(0x00001000) - .D32(0x00000000) - .D32(0x00000001) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x0932f6a8) - .D32(0x00000000) - .D32(0x0932f6d8) - .D32(0x00000000) - .D32(0x000000d6) - .D32(0x0764e000) - .D32(0x7ff9a000) - .D32(0x0932f3fc) - .D32(0x00000001) - .D32(0x00000001) - .D32(0x07578828) - .D32(0x0000002e) - .D32(0x0932f340) - .D32(0x0932eef4) - .D32(0x0932ffdc) - .D32(0x7c839ad8) - .D32(0x7c80f0d8) - .D32(0x00000000) - .Mark(&frame2_ebp) - .D32(frame3_ebp) // Child EBP - .D32(0x01d13f91) // return address of frame 2 - // inside chrome_dll!file_util::FileEnumerator::Next - .D32(0x07578828) - .D32(0x0932f6ac) - .D32(0x0932f9c4) - .D32(0x0932f9b4) - .D32(0x00000000) - .D32(0x00000003) - .D32(0x0932f978) - .D32(0x01094330) - .D32(0x00000000) - .D32(0x00000001) - .D32(0x01094330) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x07f30000) - .D32(0x01c3ba17) - .D32(0x08bab840) - .D32(0x07f31580) - .D32(0x00000000) - .D32(0x00000007) - .D32(0x0932f940) - .D32(0x0000002e) - .D32(0x0932f40c) - .D32(0x01d13b53) - .D32(0x0932f958) - .D32(0x00000001) - .D32(0x00000007) - .D32(0x0932f940) - .D32(0x0000002e) - .D32(0x00000000) - .D32(0x0932f6ac) - .D32(0x01e13ef0) - .D32(0x00000001) - .D32(0x00000007) - .D32(0x0932f958) - .D32(0x08bab840) - .D32(0x0932f9b4) - .D32(0x00000000) - .D32(0x0932f9b4) - .D32(0x000000a7) - .D32(0x000000a7) - .D32(0x0932f998) - .D32(0x579627a2) - .Mark(&frame3_ebp) - .D32(0) // saved %ebp (stack end) - .D32(0); // saved %eip (stack end) - - RegionFromSection(); - raw_context.eip = 0x77c181cd; // inside msvcrt!wcsstr - raw_context.esp = frame0_esp.Value(); - raw_context.ebp = frame0_ebp.Value(); - // sanity - ASSERT_TRUE(raw_context.esp == stack_section.start().Value()); - ASSERT_TRUE(raw_context.ebp == stack_section.start().Value() + 8); - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, - &local_modules, &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - - ASSERT_EQ(3U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(0x77c181cdU, frame0->instruction); - EXPECT_EQ(0x77c181cdU, frame0->context.eip); - EXPECT_EQ(frame0_esp.Value(), frame0->context.esp); - EXPECT_EQ(frame0_ebp.Value(), frame0->context.ebp); - EXPECT_EQ(&msvcrt_dll, frame0->module); - EXPECT_EQ("wcsstr", frame0->function_name); - ASSERT_TRUE(frame0->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame0->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame0->windows_frame_info->type_); - EXPECT_EQ("$T0 $ebp = $eip $T0 " - "4 + ^ = $ebp $T0 ^ = $esp $T0 8 + = $L $T0 .cbSavedRegs " - "- = $P $T0 4 + .cbParams + =", - frame0->windows_frame_info->program_string); - // It has program string, so allocates_base_pointer is not expected - EXPECT_FALSE(frame0->windows_frame_info->allocates_base_pointer); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI_SCAN, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP | - StackFrameX86::CONTEXT_VALID_ESP | - StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(0x7c80f10fU, frame1->instruction + 1); - EXPECT_EQ(0x7c80f10fU, frame1->context.eip); - // frame 1 was skipped, so intead of frame1_ebp compare with frame2_ebp. - EXPECT_EQ(frame2_ebp.Value(), frame1->context.ebp); - EXPECT_EQ(&kernel32_dll, frame1->module); - EXPECT_EQ("FindNextFileW", frame1->function_name); - ASSERT_TRUE(frame1->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame1->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame1->windows_frame_info->type_); - EXPECT_EQ("$T0 $ebp = $eip $T0 " - "4 + ^ = $ebp $T0 ^ = $esp $T0 8 + = $L $T0 .cbSavedRegs " - "- = $P $T0 4 + .cbParams + =", - frame1->windows_frame_info->program_string); - EXPECT_FALSE(frame1->windows_frame_info->allocates_base_pointer); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame2 = static_cast<StackFrameX86 *>(frames->at(2)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame2->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP | - StackFrameX86::CONTEXT_VALID_ESP | - StackFrameX86::CONTEXT_VALID_EBP), - frame2->context_validity); - EXPECT_EQ(0x01d13f91U, frame2->instruction + 1); - EXPECT_EQ(0x01d13f91U, frame2->context.eip); - // frame 1 was skipped, so intead of frame2_ebp compare with frame3_ebp. - EXPECT_EQ(frame3_ebp.Value(), frame2->context.ebp); - EXPECT_EQ(&chrome_dll, frame2->module); - EXPECT_EQ("file_util::FileEnumerator::Next()", frame2->function_name); - ASSERT_TRUE(frame2->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame2->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame2->windows_frame_info->type_); - EXPECT_EQ("$T1 .raSearch = " - "$T0 $T1 4 - 8 @ = $ebp $T1 4 - ^ = $eip $T1 ^ = $esp " - "$T1 4 + = $20 $T0 152 - ^ = $23 $T0 156 - ^ = $24 " - "$T0 160 - ^ =", - frame2->windows_frame_info->program_string); - EXPECT_FALSE(frame2->windows_frame_info->allocates_base_pointer); - } -} - -// Test the .raSearchStart/.raSearch calculation when alignment operators are -// used in the program string. The current %ebp must be valid and it is the -// only reliable data point that can be used for that calculation. -TEST_F(GetCallerFrame, HandleAlignmentInProgramString) { - MockCodeModule chrome_dll(0x59630000, 0x19e3000, "chrome.dll", "version1"); - SetModuleSymbols(&chrome_dll, // chrome.dll - "FUNC 56422 50c 8 base::MessageLoop::RunTask" - "(base::PendingTask const &)\n" - "56422 e 458 4589\n" - "STACK WIN 4 56422 50c 11 0 8 c ac 0 1 $T1 .raSearch = $T0 " - "$T1 4 - 8 @ = $ebp $T1 4 - ^ = $eip $T1 ^ = $esp $T1 4 + = " - "$20 $T0 176 - ^ = $23 $T0 180 - ^ = $24 $T0 184 - ^ =\n" - "FUNC 55d34 34a 0 base::MessageLoop::DoWork()\n" - "55d34 11 596 4589\n" - "STACK WIN 4 55d34 34a 19 0 0 c 134 0 1 $T1 .raSearch = " - "$T0 $T1 4 - 8 @ = $ebp $T1 4 - ^ = $eip $T1 ^ = $esp " - "$T1 4 + = $20 $T0 312 - ^ = $23 $T0 316 - ^ = $24 $T0 " - "320 - ^ =\n" - "FUNC 55c39 fb 0 base::MessagePumpForIO::DoRunLoop()\n" - "55c39 d 518 19962\n" - "STACK WIN 4 55c39 fb d 0 0 c 34 0 1 $T1 .raSearch = $T0 " - "$T1 4 - 64 @ = $ebp $T1 4 - ^ = $eip $T1 ^ = $esp $T1 4 + " - "= $20 $T0 56 - ^ = $23 $T0 60 - ^ = $24 $T0 64 - ^ =\n" - "FUNC 55bf0 49 4 base::MessagePumpWin::Run(base::" - "MessagePump::Delegate *)\n" - "55bf0 49 48 4724\n" - "STACK WIN 4 55bf0 49 c 0 4 0 10 0 1 $T0 $ebp = $eip $T0 4 " - "+ ^ = $ebp $T0 ^ = $esp $T0 8 + =\n" - "FUNC 165d de 4 malloc\n" - "165d 6 119 54\n" - "STACK WIN 4 165d de d 0 4 8 0 0 1 $T1 .raSearch = $T0 " - "$T1 4 - 8 @ = $ebp $T1 4 - ^ = $eip $T1 ^ = $esp $T1 4 " - "+ = $23 $T0 4 - ^ = $24 $T0 8 - ^ =\n" - "FUNC 55ac9 79 0 base::MessageLoop::RunInternal()\n" - "55ac9 d 427 4589\n" - "STACK WIN 4 55ac9 79 d 0 0 8 10 0 1 $T1 .raSearch = $T0 " - "$T1 4 - 8 @ = $ebp $T1 4 - ^ = $eip $T1 ^ = $esp $T1 4 + = " - "$23 $T0 20 - ^ = $24 $T0 24 - ^ =\n"); - - // Create some modules with some stock debugging information. - MockCodeModules local_modules; - local_modules.Add(&chrome_dll); - - Label frame0_esp; - Label frame0_ebp; - Label frame1_esp; - Label frame1_ebp; - Label frame2_esp; - Label frame2_ebp; - Label frame3_esp; - Label frame3_ebp; - - stack_section.start() = 0x046bfc80; - stack_section - .D32(0) - .Mark(&frame0_esp) - .D32(0x01e235a0) - .D32(0x00000000) - .D32(0x01e9f580) - .D32(0x01e9f580) - .D32(0x00000020) - .D32(0x00000000) - .D32(0x00463674) - .D32(0x00000020) - .D32(0x00000000) - .D32(0x046bfcd8) - .D32(0x046bfcd8) - .D32(0x0001204b) - .D32(0x00000000) - .D32(0xfdddb523) - .D32(0x00000000) - .D32(0x00000007) - .D32(0x00000040) - .D32(0x00000000) - .D32(0x59631693) // chrome_59630000!malloc+0x36 - .D32(0x01e9f580) - .D32(0x01e9f580) - .D32(0x046bfcf8) - .D32(0x77da6704) // ntdll!NtSetIoCompletion+0xc - .D32(0x046bfd4c) - .D32(0x59685bec) // chrome_59630000!base::MessageLoop::StartHistogrammer.. - .D32(0x01e235a0) - - .Mark(&frame0_ebp) - .D32(frame1_ebp) // Child EBP .D32(0x046bfd0c) - .D32(0x59685c2e) // Return address in - // chrome_59630000!base::MessagePumpWin::Run+0x3e - .Mark(&frame1_esp) - .D32(0x01e75a90) - .D32(0x046bfd4c) - .D32(0x01e75a90) - .D32(0x00000000) - .D32(0x00000300) - .D32(0x00000001) - - .Mark(&frame1_ebp) - .D32(frame2_ebp) // Child EBP .D32(0x046bfd30) - .D32(0x59685b3c) // Return address in - // chrome_59630000!base::MessageLoop::RunInternal+0x73 - .Mark(&frame2_esp) - .D32(0x01e75a90) - .D32(0x00000000) - .D32(0x046bfd4c) - .D32(0x59658123) // chrome_59630000!std::deque.. - .D32(0x046bfda0) - .D32(0x01e79d70) - .D32(0x046bfda0) - - .Mark(&frame2_ebp) // .D32(0x046bfd40) - .D32(0) // saved %ebp (stack end) - .D32(0); // saved %eip (stack end) - - RegionFromSection(); - raw_context.eip = 0x59685c46; // Context frame in - // base::MessagePumpForIO::DoRunLoop - raw_context.esp = frame0_esp.Value(); - raw_context.ebp = frame0_ebp.Value(); - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, - &local_modules, &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - - ASSERT_EQ(3U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame->context_validity); - EXPECT_EQ("base::MessagePumpForIO::DoRunLoop()", frame->function_name); - EXPECT_EQ(0x59685c46U, frame->instruction); - EXPECT_EQ(0x59685c46U, frame->context.eip); - EXPECT_EQ(frame0_esp.Value(), frame->context.esp); - EXPECT_EQ(frame0_ebp.Value(), frame->context.ebp); - EXPECT_EQ(&chrome_dll, frame->module); - ASSERT_TRUE(frame->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame->windows_frame_info->type_); - EXPECT_EQ("$T1 .raSearch = $T0 " - "$T1 4 - 64 @ = $ebp $T1 4 - ^ = $eip $T1 ^ = $esp $T1 4 + " - "= $20 $T0 56 - ^ = $23 $T0 60 - ^ = $24 $T0 64 - ^ =", - frame->windows_frame_info->program_string); - EXPECT_FALSE(frame->windows_frame_info->allocates_base_pointer); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP | - StackFrameX86::CONTEXT_VALID_ESP | - StackFrameX86::CONTEXT_VALID_EBP), - frame->context_validity); - EXPECT_EQ("base::MessagePumpWin::Run(base::MessagePump::Delegate *)", - frame->function_name); - EXPECT_EQ(1500011566U, frame->instruction + 1); - EXPECT_EQ(1500011566U, frame->context.eip); - EXPECT_EQ(frame1_esp.Value(), frame->context.esp); - EXPECT_EQ(frame1_ebp.Value(), frame->context.ebp); - EXPECT_EQ(&chrome_dll, frame->module); - ASSERT_TRUE(frame->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame->windows_frame_info->type_); - EXPECT_EQ("$T0 $ebp = $eip $T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + =", - frame->windows_frame_info->program_string); - EXPECT_FALSE(frame->windows_frame_info->allocates_base_pointer); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame = static_cast<StackFrameX86 *>(frames->at(2)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP | - StackFrameX86::CONTEXT_VALID_ESP | - StackFrameX86::CONTEXT_VALID_EBP), - frame->context_validity); - EXPECT_EQ("base::MessageLoop::RunInternal()", frame->function_name); - EXPECT_EQ(1500011324U, frame->instruction + 1); - EXPECT_EQ(1500011324U, frame->context.eip); - EXPECT_EQ(frame2_esp.Value(), frame->context.esp); - EXPECT_EQ(frame2_ebp.Value(), frame->context.ebp); - EXPECT_EQ(&chrome_dll, frame->module); - ASSERT_TRUE(frame->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame->windows_frame_info->type_); - EXPECT_EQ("$T1 .raSearch = $T0 " - "$T1 4 - 8 @ = $ebp $T1 4 - ^ = $eip $T1 ^ = $esp $T1 4 + = " - "$23 $T0 20 - ^ = $24 $T0 24 - ^ =", - frame->windows_frame_info->program_string); - EXPECT_FALSE(frame->windows_frame_info->allocates_base_pointer); - } -} - -// Scan the stack for a return address and potentially skip frames when the -// current IP address is not in a known module. Note, that that the span of -// this scan is limited to 120 search words for the context frame and 30 -// search words (pointers) for the other frames: -// const int kRASearchWords = 30; -void GetCallerFrame::IPAddressIsNotInKnownModuleTestImpl( - bool has_corrupt_symbols) { - MockCodeModule remoting_core_dll(0x54080000, 0x501000, "remoting_core.dll", - "version1"); - string symbols_func_section = - "FUNC 137214 17d 10 PK11_Verify\n" - "FUNC 15c834 37 14 nsc_ECDSAVerifyStub\n" - "FUNC 1611d3 91 14 NSC_Verify\n" - "FUNC 162ff7 60 4 sftk_SessionFromHandle\n"; - string symbols_stack_section = - "STACK WIN 4 137214 17d 9 0 10 0 10 0 1 $T0 $ebp = " - "$eip $T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + =\n" - "STACK WIN 4 15c834 37 6 0 14 0 18 0 1 $T0 $ebp = " - "$eip $T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + =\n" - "STACK WIN 4 1611d3 91 7 0 14 0 8 0 1 $T0 $ebp = " - "$eip $T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + =\n" - "STACK WIN 4 162ff7 60 5 0 4 0 0 0 1 $T0 $ebp = " - "$eip $T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + =\n"; - - string symbols = symbols_func_section; - if (has_corrupt_symbols) { - symbols.append(string(1, '\0')); // null terminator in the middle - symbols.append("\n"); - symbols.append("FUNC 1234\n" // invalid FUNC records - "FUNNC 1234\n" - "STACK WIN 4 1234 234 23 " // invalid STACK record - "23423423 234 23 234 234 " - "234 23 234 23 234 234 " - "234 234 234\n"); - } - symbols.append(symbols_stack_section); - SetModuleSymbols(&remoting_core_dll, symbols); - - // Create some modules with some stock debugging information. - MockCodeModules local_modules; - local_modules.Add(&remoting_core_dll); - - Label frame0_esp; - Label frame0_ebp; - Label frame1_ebp; - Label frame1_esp; - Label frame2_ebp; - Label frame2_esp; - Label frame3_ebp; - Label frame3_esp; - Label bogus_stack_location_1; - Label bogus_stack_location_2; - Label bogus_stack_location_3; - - stack_section.start() = 0x01a3ea28; - stack_section - .Mark(&frame0_esp) - .D32(bogus_stack_location_2) - .D32(bogus_stack_location_1) - .D32(0x042478e4) - .D32(bogus_stack_location_2) - .D32(0x00000000) - .D32(0x041f0420) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x00000040) - .D32(0x00000001) - .D32(0x00b7e0d0) - .D32(0x00000000) - .D32(0x00000040) - .D32(0x00000001) - .D32(0x00b7f570) - .Mark(&bogus_stack_location_1) - .D32(0x00000000) - .D32(0x00000040) - .D32(0x00000008) - .D32(0x04289530) - .D32(0x00000000) - .D32(0x00000040) - .D32(0x00000008) - .D32(0x00b7e910) - .D32(0x00000000) - .D32(0x00000040) - .D32(0x00000008) - .D32(0x00b7d998) - .D32(0x00000000) - .D32(0x00000040) - .D32(0x00000008) - .D32(0x00b7dec0) - .Mark(&bogus_stack_location_2) - .D32(0x00000000) - .D32(0x00000040) - .D32(0x00000008) - .D32(0x04289428) - .D32(0x00000000) - .D32(0x00000040) - .D32(0x00000008) - .D32(0x00b7f258) - .Mark(&bogus_stack_location_3) - .D32(0x00000000) - .D32(0x041f3560) - .D32(0x00000041) - .D32(0x00000020) - .D32(0xffffffff) - .Mark(&frame0_ebp) - .D32(frame1_ebp) // Child %ebp - .D32(0x541dc866) // return address of frame 0 - // inside remoting_core!nsc_ECDSAVerifyStub+0x32 - .Mark(&frame1_esp) - .D32(0x04247860) - .D32(0x01a3eaec) - .D32(0x01a3eaf8) - .D32(0x541e304f) // remoting_core!sftk_SessionFromHandle+0x58 - .D32(0x0404c620) - .D32(0x00000040) - .D32(0x01a3eb2c) - .D32(0x01a3ec08) - .D32(0x00000014) - .Mark(&frame1_ebp) - .D32(frame2_ebp) // Child %ebp - .D32(0x541e1234) // return address of frame 1 - // inside remoting_core!NSC_Verify+0x61 - .Mark(&frame2_esp) - .D32(0x04247858) - .D32(0x0404c620) - .D32(0x00000040) - .D32(0x01a3ec08) - .D32(0x00000014) - .D32(0x01000005) - .D32(0x00b2f7a0) - .D32(0x041f0420) - .D32(0x041f3650) - .Mark(&frame2_ebp) - .D32(frame3_ebp) // Child %ebp - .D32(0x541b734d) // return address of frame 1 - // inside remoting_core!PK11_Verify+0x139 - .Mark(&frame3_esp) - .D32(0x01000005) - .D32(0x01a3ec08) - .D32(0x00000014) - .D32(0x0404c620) - .D32(0x00000040) - .D32(0x04073e00) - .D32(0x04073e00) - .D32(0x04247050) - .D32(0x00001041) - .D32(0x00000000) - .D32(0x00000000) - .D32(0x00000000) - .Mark(&frame3_ebp) - .D32(0) // saved %ebp (stack end) - .D32(0); // saved %eip (stack end) - - RegionFromSection(); - raw_context.eip = 0x4247860; // IP address not in known module - raw_context.ebp = 0x5420362d; // bogus - raw_context.esp = frame0_esp.Value(); - - // sanity - ASSERT_TRUE(raw_context.esp == stack_section.start().Value()); - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, - &local_modules, &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - if (has_corrupt_symbols) { - ASSERT_EQ(1U, modules_with_corrupt_symbols.size()); - ASSERT_EQ("remoting_core.dll", - modules_with_corrupt_symbols[0]->debug_file()); - } else { - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - } - frames = call_stack.frames(); - - ASSERT_EQ(4U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ(raw_context.eip, frame0->context.eip); - EXPECT_EQ(raw_context.ebp, frame0->context.ebp); - EXPECT_EQ(raw_context.esp, frame0->context.esp); - EXPECT_EQ(NULL, frame0->module); // IP not in known module - EXPECT_EQ("", frame0->function_name); - ASSERT_EQ(NULL, frame0->windows_frame_info); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP | - StackFrameX86::CONTEXT_VALID_ESP | - StackFrameX86::CONTEXT_VALID_EBP), - frame1->context_validity); - EXPECT_EQ(frame1_ebp.Value(), frame1->context.ebp); - EXPECT_EQ(frame1_esp.Value(), frame1->context.esp); - EXPECT_EQ(&remoting_core_dll, frame1->module); - EXPECT_EQ("nsc_ECDSAVerifyStub", frame1->function_name); - ASSERT_TRUE(frame1->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame1->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame1->windows_frame_info->type_); - EXPECT_EQ("$T0 $ebp = $eip $T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + =", - frame1->windows_frame_info->program_string); - EXPECT_FALSE(frame1->windows_frame_info->allocates_base_pointer); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame2 = static_cast<StackFrameX86 *>(frames->at(2)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame2->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP | - StackFrameX86::CONTEXT_VALID_ESP | - StackFrameX86::CONTEXT_VALID_EBP), - frame2->context_validity); - EXPECT_EQ(frame2_ebp.Value(), frame2->context.ebp); - EXPECT_EQ(frame2_esp.Value(), frame2->context.esp); - EXPECT_EQ(&remoting_core_dll, frame2->module); - EXPECT_EQ("NSC_Verify", frame2->function_name); - ASSERT_TRUE(frame2->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame2->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame2->windows_frame_info->type_); - EXPECT_EQ("$T0 $ebp = $eip $T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + =", - frame2->windows_frame_info->program_string); - EXPECT_FALSE(frame2->windows_frame_info->allocates_base_pointer); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame3 = static_cast<StackFrameX86 *>(frames->at(3)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame3->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP | - StackFrameX86::CONTEXT_VALID_ESP | - StackFrameX86::CONTEXT_VALID_EBP), - frame3->context_validity); - EXPECT_EQ(frame3_ebp.Value(), frame3->context.ebp); - EXPECT_EQ(frame3_esp.Value(), frame3->context.esp); - EXPECT_EQ(&remoting_core_dll, frame3->module); - EXPECT_EQ("PK11_Verify", frame3->function_name); - ASSERT_TRUE(frame3->windows_frame_info != NULL); - EXPECT_EQ(WindowsFrameInfo::VALID_ALL, frame3->windows_frame_info->valid); - EXPECT_EQ(WindowsFrameInfo::STACK_INFO_FRAME_DATA, - frame3->windows_frame_info->type_); - EXPECT_EQ("$T0 $ebp = $eip $T0 4 + ^ = $ebp $T0 ^ = $esp $T0 8 + =", - frame3->windows_frame_info->program_string); - EXPECT_FALSE(frame3->windows_frame_info->allocates_base_pointer); - } -} - -// Runs IPAddressIsNotInKnownModule test with good symbols -TEST_F(GetCallerFrame, IPAddressIsNotInKnownModule) { - IPAddressIsNotInKnownModuleTestImpl(false /* has_corrupt_modules */); -} - -// Runs IPAddressIsNotInKnownModule test with corrupt symbols -TEST_F(GetCallerFrame, IPAddressIsNotInKnownModule_CorruptSymbols) { - IPAddressIsNotInKnownModuleTestImpl(true /* has_corrupt_modules */); -} - -struct CFIFixture: public StackwalkerX86Fixture { - CFIFixture() { - // Provide a bunch of STACK CFI records; individual tests walk to the - // caller from every point in this series, expecting to find the same - // set of register values. - SetModuleSymbols(&module1, - // The youngest frame's function. - "FUNC 4000 1000 10 enchiridion\n" - // Initially, just a return address. - "STACK CFI INIT 4000 100 .cfa: $esp 4 + .ra: .cfa 4 - ^\n" - // Push %ebx. - "STACK CFI 4001 .cfa: $esp 8 + $ebx: .cfa 8 - ^\n" - // Move %esi into %ebx. Weird, but permitted. - "STACK CFI 4002 $esi: $ebx\n" - // Allocate frame space, and save %edi. - "STACK CFI 4003 .cfa: $esp 20 + $edi: .cfa 16 - ^\n" - // Put the return address in %edi. - "STACK CFI 4005 .ra: $edi\n" - // Save %ebp, and use it as a frame pointer. - "STACK CFI 4006 .cfa: $ebp 8 + $ebp: .cfa 12 - ^\n" - - // The calling function. - "FUNC 5000 1000 10 epictetus\n" - // Mark it as end of stack. - "STACK CFI INIT 5000 1000 .cfa: $esp .ra 0\n"); - - // Provide some distinctive values for the caller's registers. - expected.esp = 0x80000000; - expected.eip = 0x40005510; - expected.ebp = 0xc0d4aab9; - expected.ebx = 0x60f20ce6; - expected.esi = 0x53d1379d; - expected.edi = 0xafbae234; - - // By default, registers are unchanged. - raw_context = expected; - } - - // Walk the stack, using stack_section as the contents of the stack - // and raw_context as the current register values. (Set - // raw_context.esp to the stack's starting address.) Expect two - // stack frames; in the older frame, expect the callee-saves - // registers to have values matching those in 'expected'. - void CheckWalk() { - RegionFromSection(); - raw_context.esp = stack_section.start().Value(); - - StackFrameSymbolizer frame_symbolizer(&supplier, &resolver); - StackwalkerX86 walker(&system_info, &raw_context, &stack_region, &modules, - &frame_symbolizer); - vector<const CodeModule*> modules_without_symbols; - vector<const CodeModule*> modules_with_corrupt_symbols; - ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols, - &modules_with_corrupt_symbols)); - ASSERT_EQ(0U, modules_without_symbols.size()); - ASSERT_EQ(0U, modules_with_corrupt_symbols.size()); - frames = call_stack.frames(); - ASSERT_EQ(2U, frames->size()); - - { // To avoid reusing locals by mistake - StackFrameX86 *frame0 = static_cast<StackFrameX86 *>(frames->at(0)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); - ASSERT_EQ(StackFrameX86::CONTEXT_VALID_ALL, frame0->context_validity); - EXPECT_EQ("enchiridion", frame0->function_name); - EXPECT_EQ(0x40004000U, frame0->function_base); - ASSERT_TRUE(frame0->windows_frame_info != NULL); - ASSERT_EQ(WindowsFrameInfo::VALID_PARAMETER_SIZE, - frame0->windows_frame_info->valid); - ASSERT_TRUE(frame0->cfi_frame_info != NULL); - } - - { // To avoid reusing locals by mistake - StackFrameX86 *frame1 = static_cast<StackFrameX86 *>(frames->at(1)); - EXPECT_EQ(StackFrame::FRAME_TRUST_CFI, frame1->trust); - ASSERT_EQ((StackFrameX86::CONTEXT_VALID_EIP | - StackFrameX86::CONTEXT_VALID_ESP | - StackFrameX86::CONTEXT_VALID_EBP | - StackFrameX86::CONTEXT_VALID_EBX | - StackFrameX86::CONTEXT_VALID_ESI | - StackFrameX86::CONTEXT_VALID_EDI), - frame1->context_validity); - EXPECT_EQ(expected.eip, frame1->context.eip); - EXPECT_EQ(expected.esp, frame1->context.esp); - EXPECT_EQ(expected.ebp, frame1->context.ebp); - EXPECT_EQ(expected.ebx, frame1->context.ebx); - EXPECT_EQ(expected.esi, frame1->context.esi); - EXPECT_EQ(expected.edi, frame1->context.edi); - EXPECT_EQ("epictetus", frame1->function_name); - } - } - - // The values the stack walker should find for the caller's registers. - MDRawContextX86 expected; -}; - -class CFI: public CFIFixture, public Test { }; - -TEST_F(CFI, At4000) { - Label frame1_esp = expected.esp; - stack_section - .D32(0x40005510) // return address - .Mark(&frame1_esp); // This effectively sets stack_section.start(). - raw_context.eip = 0x40004000; - CheckWalk(); -} - -TEST_F(CFI, At4001) { - Label frame1_esp = expected.esp; - stack_section - .D32(0x60f20ce6) // saved %ebx - .D32(0x40005510) // return address - .Mark(&frame1_esp); // This effectively sets stack_section.start(). - raw_context.eip = 0x40004001; - raw_context.ebx = 0x91aa9a8b; // callee's %ebx value - CheckWalk(); -} - -TEST_F(CFI, At4002) { - Label frame1_esp = expected.esp; - stack_section - .D32(0x60f20ce6) // saved %ebx - .D32(0x40005510) // return address - .Mark(&frame1_esp); // This effectively sets stack_section.start(). - raw_context.eip = 0x40004002; - raw_context.ebx = 0x53d1379d; // saved %esi - raw_context.esi = 0xa5c790ed; // callee's %esi value - CheckWalk(); -} - -TEST_F(CFI, At4003) { - Label frame1_esp = expected.esp; - stack_section - .D32(0x56ec3db7) // garbage - .D32(0xafbae234) // saved %edi - .D32(0x53d67131) // garbage - .D32(0x60f20ce6) // saved %ebx - .D32(0x40005510) // return address - .Mark(&frame1_esp); // This effectively sets stack_section.start(). - raw_context.eip = 0x40004003; - raw_context.ebx = 0x53d1379d; // saved %esi - raw_context.esi = 0xa97f229d; // callee's %esi - raw_context.edi = 0xb05cc997; // callee's %edi - CheckWalk(); -} - -// The results here should be the same as those at module offset -// 0x4003. -TEST_F(CFI, At4004) { - Label frame1_esp = expected.esp; - stack_section - .D32(0xe29782c2) // garbage - .D32(0xafbae234) // saved %edi - .D32(0x5ba29ce9) // garbage - .D32(0x60f20ce6) // saved %ebx - .D32(0x40005510) // return address - .Mark(&frame1_esp); // This effectively sets stack_section.start(). - raw_context.eip = 0x40004004; - raw_context.ebx = 0x53d1379d; // saved %esi - raw_context.esi = 0x0fb7dc4e; // callee's %esi - raw_context.edi = 0x993b4280; // callee's %edi - CheckWalk(); -} - -TEST_F(CFI, At4005) { - Label frame1_esp = expected.esp; - stack_section - .D32(0xe29782c2) // garbage - .D32(0xafbae234) // saved %edi - .D32(0x5ba29ce9) // garbage - .D32(0x60f20ce6) // saved %ebx - .D32(0x8036cc02) // garbage - .Mark(&frame1_esp); // This effectively sets stack_section.start(). - raw_context.eip = 0x40004005; - raw_context.ebx = 0x53d1379d; // saved %esi - raw_context.esi = 0x0fb7dc4e; // callee's %esi - raw_context.edi = 0x40005510; // return address - CheckWalk(); -} - -TEST_F(CFI, At4006) { - Label frame0_ebp; - Label frame1_esp = expected.esp; - stack_section - .D32(0xdcdd25cd) // garbage - .D32(0xafbae234) // saved %edi - .D32(0xc0d4aab9) // saved %ebp - .Mark(&frame0_ebp) // frame pointer points here - .D32(0x60f20ce6) // saved %ebx - .D32(0x8036cc02) // garbage - .Mark(&frame1_esp); // This effectively sets stack_section.start(). - raw_context.eip = 0x40004006; - raw_context.ebp = frame0_ebp.Value(); - raw_context.ebx = 0x53d1379d; // saved %esi - raw_context.esi = 0x743833c9; // callee's %esi - raw_context.edi = 0x40005510; // return address - CheckWalk(); -} - |