Process minidumps generated on ARM64 in iOS apps.

Patch by Colin Blundell <blundell@chromium.org>

BUG=542

Review URL: https://breakpad.appspot.com/704002/


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1236 4c0a9323-5329-0410-9bdc-e9ce6186880e

1 files changed, 536 insertions, 0 deletions

diff --git a/src/processor/stackwalker_arm64_unittest.cc b/src/processor/stackwalker_arm64_unittest.cc
new file mode 100644
index 00000000..1502c8f3
--- /dev/null
+++ b/src/processor/stackwalker_arm64_unittest.cc
@@ -0,0 +1,536 @@
+// 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_arm64_unittest.cc: Unit tests for StackwalkerARM64 class.
+
+#include <string.h>
+#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_arm64.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::StackFrameARM64;
+using google_breakpad::Stackwalker;
+using google_breakpad::StackwalkerARM64;
+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 StackwalkerARM64Fixture {
+ public:
+  StackwalkerARM64Fixture()
+    : 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") {
+    // Identify the system as an iOS system, since that is the only platform
+    // for which ARM64 support is currently enabled.
+    system_info.os = "iOS";
+    system_info.os_short = "ios";
+    system_info.cpu = "arm64";
+    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);
+
+    // 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(MDRawContextARM64 *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;
+  MDRawContextARM64 raw_context;
+  Section stack_section;
+  MockMemoryRegion stack_region;
+  MockCodeModule module1;
+  MockCodeModule module2;
+  MockCodeModules modules;
+  MockSymbolSupplier supplier;
+  BasicSourceLineResolver resolver;
+  CallStack call_stack;
+  const vector<StackFrame *> *frames;
+};
+
+class SanityCheck: public StackwalkerARM64Fixture, public Test { };
+
+TEST_F(SanityCheck, NoResolver) {
+  // Since the context's frame pointer is garbage, the stack walk will end after
+  // the first frame.
+  StackFrameSymbolizer frame_symbolizer(NULL, NULL);
+  StackwalkerARM64 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(0U, modules_without_symbols.size());
+  ASSERT_EQ(0U, modules_with_corrupt_symbols.size());
+  frames = call_stack.frames();
+  ASSERT_EQ(1U, frames->size());
+  StackFrameARM64 *frame = static_cast<StackFrameARM64 *>(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 StackwalkerARM64Fixture, public Test { };
+
+// The stackwalker should be able to produce the context frame even
+// without stack memory present.
+TEST_F(GetContextFrame, NoStackMemory) {
+  StackFrameSymbolizer frame_symbolizer(&supplier, &resolver);
+  StackwalkerARM64 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(0U, modules_without_symbols.size());
+  ASSERT_EQ(0U, modules_with_corrupt_symbols.size());
+  frames = call_stack.frames();
+  ASSERT_EQ(1U, frames->size());
+  StackFrameARM64 *frame = static_cast<StackFrameARM64 *>(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 StackwalkerARM64Fixture, public Test { };
+
+TEST_F(GetCallerFrame, ScanWithoutSymbols) {
+  // When the stack walker resorts to scanning the stack,
+  // only addresses located within loaded modules are
+  // considered valid return addresses.
+  // Force scanning through three frames to ensure that the
+  // stack pointer is set properly in scan-recovered frames.
+  stack_section.start() = 0x80000000;
+  uint64_t return_address1 = 0x50000100;
+  uint64_t return_address2 = 0x50000900;
+  Label frame1_sp, frame2_sp;
+  stack_section
+    // frame 0
+    .Append(16, 0)                      // space
+
+    .D64(0x40090000)                    // junk that's not
+    .D64(0x60000000)                    // a return address
+
+    .D64(return_address1)               // actual return address
+    // frame 1
+    .Mark(&frame1_sp)
+    .Append(16, 0)                      // space
+
+    .D64(0xF0000000)                    // more junk
+    .D64(0x0000000D)
+
+    .D64(return_address2)               // actual return address
+    // frame 2
+    .Mark(&frame2_sp)
+    .Append(64, 0);                     // end of stack
+  RegionFromSection();
+
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_PC] = 0x40005510;
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_SP] = stack_section.start().Value();
+
+  StackFrameSymbolizer frame_symbolizer(&supplier, &resolver);
+  StackwalkerARM64 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(2U, modules_without_symbols.size());
+  ASSERT_EQ("module1", modules_without_symbols[0]->debug_file());
+  ASSERT_EQ("module2", modules_without_symbols[1]->debug_file());
+  ASSERT_EQ(0U, modules_with_corrupt_symbols.size());
+  frames = call_stack.frames();
+  ASSERT_EQ(3U, frames->size());
+
+  StackFrameARM64 *frame0 = static_cast<StackFrameARM64 *>(frames->at(0));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust);
+  ASSERT_EQ(StackFrameARM64::CONTEXT_VALID_ALL,
+            frame0->context_validity);
+  EXPECT_EQ(0, memcmp(&raw_context, &frame0->context, sizeof(raw_context)));
+
+  StackFrameARM64 *frame1 = static_cast<StackFrameARM64 *>(frames->at(1));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame1->trust);
+  ASSERT_EQ((StackFrameARM64::CONTEXT_VALID_PC |
+             StackFrameARM64::CONTEXT_VALID_SP),
+            frame1->context_validity);
+  EXPECT_EQ(return_address1, frame1->context.iregs[MD_CONTEXT_ARM64_REG_PC]);
+  EXPECT_EQ(frame1_sp.Value(), frame1->context.iregs[MD_CONTEXT_ARM64_REG_SP]);
+
+  StackFrameARM64 *frame2 = static_cast<StackFrameARM64 *>(frames->at(2));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame2->trust);
+  ASSERT_EQ((StackFrameARM64::CONTEXT_VALID_PC |
+             StackFrameARM64::CONTEXT_VALID_SP),
+            frame2->context_validity);
+  EXPECT_EQ(return_address2, frame2->context.iregs[MD_CONTEXT_ARM64_REG_PC]);
+  EXPECT_EQ(frame2_sp.Value(), frame2->context.iregs[MD_CONTEXT_ARM64_REG_SP]);
+}
+
+TEST_F(GetCallerFrame, ScanWithFunctionSymbols) {
+  // During stack scanning, if a potential return address
+  // is located within a loaded module that has symbols,
+  // it is only considered a valid return address if it
+  // lies within a function's bounds.
+  stack_section.start() = 0x80000000;
+  uint64_t return_address = 0x50000200;
+  Label frame1_sp;
+
+  stack_section
+    // frame 0
+    .Append(16, 0)                      // space
+
+    .D64(0x40090000)                    // junk that's not
+    .D64(0x60000000)                    // a return address
+
+    .D64(0x40001000)                    // a couple of plausible addresses
+    .D64(0x5000F000)                    // that are not within functions
+
+    .D64(return_address)                // actual return address
+    // frame 1
+    .Mark(&frame1_sp)
+    .Append(64, 0);                     // end of stack
+  RegionFromSection();
+
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_PC] = 0x40000200;
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_SP] = stack_section.start().Value();
+
+  SetModuleSymbols(&module1,
+                   // The youngest frame's function.
+                   "FUNC 100 400 10 monotreme\n");
+  SetModuleSymbols(&module2,
+                   // The calling frame's function.
+                   "FUNC 100 400 10 marsupial\n");
+
+  StackFrameSymbolizer frame_symbolizer(&supplier, &resolver);
+  StackwalkerARM64 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());
+
+  StackFrameARM64 *frame0 = static_cast<StackFrameARM64 *>(frames->at(0));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust);
+  ASSERT_EQ(StackFrameARM64::CONTEXT_VALID_ALL,
+            frame0->context_validity);
+  EXPECT_EQ(0, memcmp(&raw_context, &frame0->context, sizeof(raw_context)));
+  EXPECT_EQ("monotreme", frame0->function_name);
+  EXPECT_EQ(0x40000100ULL, frame0->function_base);
+
+  StackFrameARM64 *frame1 = static_cast<StackFrameARM64 *>(frames->at(1));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame1->trust);
+  ASSERT_EQ((StackFrameARM64::CONTEXT_VALID_PC |
+             StackFrameARM64::CONTEXT_VALID_SP),
+            frame1->context_validity);
+  EXPECT_EQ(return_address, frame1->context.iregs[MD_CONTEXT_ARM64_REG_PC]);
+  EXPECT_EQ(frame1_sp.Value(), frame1->context.iregs[MD_CONTEXT_ARM64_REG_SP]);
+  EXPECT_EQ("marsupial", frame1->function_name);
+  EXPECT_EQ(0x50000100ULL, frame1->function_base);
+}
+
+TEST_F(GetCallerFrame, ScanFirstFrame) {
+  // If the stackwalker resorts to stack scanning, it will scan much
+  // farther to find the caller of the context frame.
+  stack_section.start() = 0x80000000;
+  uint64_t return_address1 = 0x50000100;
+  uint64_t return_address2 = 0x50000900;
+  Label frame1_sp, frame2_sp;
+  stack_section
+    // frame 0
+    .Append(32, 0)                      // space
+
+    .D64(0x40090000)                    // junk that's not
+    .D64(0x60000000)                    // a return address
+
+    .Append(96, 0)                      // more space
+
+    .D64(return_address1)               // actual return address
+    // frame 1
+    .Mark(&frame1_sp)
+    .Append(32, 0)                      // space
+
+    .D64(0xF0000000)                    // more junk
+    .D64(0x0000000D)
+
+    .Append(256, 0)                     // more space
+
+    .D64(return_address2)               // actual return address
+                                        // (won't be found)
+    // frame 2
+    .Mark(&frame2_sp)
+    .Append(64, 0);                     // end of stack
+  RegionFromSection();
+
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_PC] = 0x40005510;
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_SP] = stack_section.start().Value();
+
+  StackFrameSymbolizer frame_symbolizer(&supplier, &resolver);
+  StackwalkerARM64 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(2U, modules_without_symbols.size());
+  ASSERT_EQ("module1", modules_without_symbols[0]->debug_file());
+  ASSERT_EQ("module2", modules_without_symbols[1]->debug_file());
+  ASSERT_EQ(0U, modules_with_corrupt_symbols.size());
+  frames = call_stack.frames();
+  ASSERT_EQ(2U, frames->size());
+
+  StackFrameARM64 *frame0 = static_cast<StackFrameARM64 *>(frames->at(0));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust);
+  ASSERT_EQ(StackFrameARM64::CONTEXT_VALID_ALL,
+            frame0->context_validity);
+  EXPECT_EQ(0, memcmp(&raw_context, &frame0->context, sizeof(raw_context)));
+
+  StackFrameARM64 *frame1 = static_cast<StackFrameARM64 *>(frames->at(1));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame1->trust);
+  ASSERT_EQ((StackFrameARM64::CONTEXT_VALID_PC |
+             StackFrameARM64::CONTEXT_VALID_SP),
+            frame1->context_validity);
+  EXPECT_EQ(return_address1, frame1->context.iregs[MD_CONTEXT_ARM64_REG_PC]);
+  EXPECT_EQ(frame1_sp.Value(), frame1->context.iregs[MD_CONTEXT_ARM64_REG_SP]);
+}
+
+// Test that set_max_frames_scanned prevents using stack scanning
+// to find caller frames.
+TEST_F(GetCallerFrame, ScanningNotAllowed) {
+  // When the stack walker resorts to scanning the stack,
+  // only addresses located within loaded modules are
+  // considered valid return addresses.
+  stack_section.start() = 0x80000000;
+  uint64_t return_address1 = 0x50000100;
+  uint64_t return_address2 = 0x50000900;
+  Label frame1_sp, frame2_sp;
+  stack_section
+    // frame 0
+    .Append(16, 0)                      // space
+
+    .D64(0x40090000)                    // junk that's not
+    .D64(0x60000000)                    // a return address
+
+    .D64(return_address1)               // actual return address
+    // frame 1
+    .Mark(&frame1_sp)
+    .Append(16, 0)                      // space
+
+    .D64(0xF0000000)                    // more junk
+    .D64(0x0000000D)
+
+    .D64(return_address2)               // actual return address
+    // frame 2
+    .Mark(&frame2_sp)
+    .Append(64, 0);                     // end of stack
+  RegionFromSection();
+
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_PC] = 0x40005510;
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_SP] = stack_section.start().Value();
+
+  StackFrameSymbolizer frame_symbolizer(&supplier, &resolver);
+  StackwalkerARM64 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());
+
+  StackFrameARM64 *frame0 = static_cast<StackFrameARM64 *>(frames->at(0));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust);
+  ASSERT_EQ(StackFrameARM64::CONTEXT_VALID_ALL,
+            frame0->context_validity);
+  EXPECT_EQ(0, memcmp(&raw_context, &frame0->context, sizeof(raw_context)));
+}
+
+class GetFramesByFramePointer: public StackwalkerARM64Fixture, public Test { };
+
+TEST_F(GetFramesByFramePointer, OnlyFramePointer) {
+  stack_section.start() = 0x80000000;
+  uint64_t return_address1 = 0x50000100;
+  uint64_t return_address2 = 0x50000900;
+  Label frame1_sp, frame2_sp;
+  Label frame1_fp, frame2_fp;
+  stack_section
+    // frame 0
+    .Append(64, 0)           // Whatever values on the stack.
+    .D64(0x0000000D)         // junk that's not
+    .D64(0xF0000000)         // a return address.
+
+    .Mark(&frame1_fp)        // Next fp will point to the next value.
+    .D64(frame2_fp)          // Save current frame pointer.
+    .D64(return_address2)    // Save current link register.
+    .Mark(&frame1_sp)
+
+    // frame 1
+    .Append(64, 0)           // Whatever values on the stack.
+    .D64(0x0000000D)         // junk that's not
+    .D64(0xF0000000)         // a return address.
+
+    .Mark(&frame2_fp)
+    .D64(0)
+    .D64(0)
+    .Mark(&frame2_sp)
+
+    // frame 2
+    .Append(64, 0)           // Whatever values on the stack.
+    .D64(0x0000000D)         // junk that's not
+    .D64(0xF0000000);        // a return address.
+  RegionFromSection();
+
+
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_PC] = 0x40005510;
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_LR] = return_address1;
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_FP] = frame1_fp.Value();
+  raw_context.iregs[MD_CONTEXT_ARM64_REG_SP] = stack_section.start().Value();
+
+  StackFrameSymbolizer frame_symbolizer(&supplier, &resolver);
+  StackwalkerARM64 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(2U, modules_without_symbols.size());
+  ASSERT_EQ("module1", modules_without_symbols[0]->debug_file());
+  ASSERT_EQ("module2", modules_without_symbols[1]->debug_file());
+  ASSERT_EQ(0U, modules_with_corrupt_symbols.size());
+  frames = call_stack.frames();
+  ASSERT_EQ(3U, frames->size());
+
+  StackFrameARM64 *frame0 = static_cast<StackFrameARM64 *>(frames->at(0));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust);
+  ASSERT_EQ(StackFrameARM64::CONTEXT_VALID_ALL,
+            frame0->context_validity);
+  EXPECT_EQ(0, memcmp(&raw_context, &frame0->context, sizeof(raw_context)));
+
+  StackFrameARM64 *frame1 = static_cast<StackFrameARM64 *>(frames->at(1));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_FP, frame1->trust);
+  ASSERT_EQ((StackFrameARM64::CONTEXT_VALID_PC |
+             StackFrameARM64::CONTEXT_VALID_LR |
+             StackFrameARM64::CONTEXT_VALID_FP |
+             StackFrameARM64::CONTEXT_VALID_SP),
+            frame1->context_validity);
+  EXPECT_EQ(return_address1, frame1->context.iregs[MD_CONTEXT_ARM64_REG_PC]);
+  EXPECT_EQ(return_address2, frame1->context.iregs[MD_CONTEXT_ARM64_REG_LR]);
+  EXPECT_EQ(frame1_sp.Value(), frame1->context.iregs[MD_CONTEXT_ARM64_REG_SP]);
+  EXPECT_EQ(frame2_fp.Value(),
+            frame1->context.iregs[MD_CONTEXT_ARM64_REG_FP]);
+
+  StackFrameARM64 *frame2 = static_cast<StackFrameARM64 *>(frames->at(2));
+  EXPECT_EQ(StackFrame::FRAME_TRUST_FP, frame2->trust);
+  ASSERT_EQ((StackFrameARM64::CONTEXT_VALID_PC |
+             StackFrameARM64::CONTEXT_VALID_LR |
+             StackFrameARM64::CONTEXT_VALID_FP |
+             StackFrameARM64::CONTEXT_VALID_SP),
+            frame2->context_validity);
+  EXPECT_EQ(return_address2, frame2->context.iregs[MD_CONTEXT_ARM64_REG_PC]);
+  EXPECT_EQ(0U, frame2->context.iregs[MD_CONTEXT_ARM64_REG_LR]);
+  EXPECT_EQ(frame2_sp.Value(), frame2->context.iregs[MD_CONTEXT_ARM64_REG_SP]);
+  EXPECT_EQ(0U, frame2->context.iregs[MD_CONTEXT_ARM64_REG_FP]);
+}