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android_system_core/libunwindstack/tests/UnwinderTest.cpp
Christopher Ferris be788d891d Allow multiple threads sharing a map to unwind. 
Add a mutex in MapInfo, and a mutex in Elf. Lock the creation of an Elf
file using the MapInfo mutex, and lock when calling Step, GetFunctionName,
or GetSoname since they can modify information in the object. It might
be beneficial to use a fine grained lock in the future.

Change the Maps object to contain a vector of MapInfo pointers rather
than the total objects. This avoids copying this data around.

Add a test to libbacktrace to verify that sharing a map while doing
unwinds in different threads works.

Add concurrency tests in libunwindstack to verify the locking works.

Add always inline to the RegsGetLocal arm and aarch64 functions. I had
a case where clang did not inline the code, so make sure this is specified.

Bug: 68813077

Test: New unit tests to cover the case. Passes all unit tests.
Test: Ran a monkey test while dumping bugreports and verified that
Test: no crashes in libunwind.
Test: Remove the locking and verified that all of the concurrenty tests fail.
Change-Id: I769e728c676f6bdae9e64ce4cdc03b6749beae03
2017-11-28 15:20:38 -08:00

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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <elf.h>
#include <stdint.h>
#include <sys/mman.h>
#include <memory>
#include <set>
#include <string>
#include <gtest/gtest.h>
#include <unwindstack/Elf.h>
#include <unwindstack/Maps.h>
#include <unwindstack/Memory.h>
#include <unwindstack/Regs.h>
#include <unwindstack/Unwinder.h>
#include "ElfFake.h"
#include "MemoryFake.h"
#include "RegsFake.h"
namespace unwindstack {
class MapsFake : public Maps {
public:
MapsFake() = default;
virtual ~MapsFake() = default;
bool Parse() { return true; }
void FakeClear() { maps_.clear(); }
void FakeAddMapInfo(MapInfo* map_info) { maps_.push_back(map_info); }
};
class UnwinderTest : public ::testing::Test {
protected:
static void SetUpTestCase() {
maps_.FakeClear();
MapInfo* info = new MapInfo(0x1000, 0x8000, 0, PROT_READ | PROT_WRITE, "/system/fake/libc.so");
ElfFake* elf = new ElfFake(nullptr);
info->elf = elf;
elf->FakeSetInterface(new ElfInterfaceFake(nullptr));
maps_.FakeAddMapInfo(info);
info = new MapInfo(0x10000, 0x12000, 0, PROT_READ | PROT_WRITE, "[stack]");
maps_.FakeAddMapInfo(info);
info = new MapInfo(0x13000, 0x15000, 0, PROT_READ | PROT_WRITE | MAPS_FLAGS_DEVICE_MAP,
"/dev/fake_device");
maps_.FakeAddMapInfo(info);
info = new MapInfo(0x20000, 0x22000, 0, PROT_READ | PROT_WRITE, "/system/fake/libunwind.so");
elf = new ElfFake(nullptr);
info->elf = elf;
elf->FakeSetInterface(new ElfInterfaceFake(nullptr));
maps_.FakeAddMapInfo(info);
info = new MapInfo(0x23000, 0x24000, 0, PROT_READ | PROT_WRITE, "/fake/libanother.so");
elf = new ElfFake(nullptr);
info->elf = elf;
elf->FakeSetInterface(new ElfInterfaceFake(nullptr));
maps_.FakeAddMapInfo(info);
info = new MapInfo(0x33000, 0x34000, 0, PROT_READ | PROT_WRITE, "/fake/compressed.so");
elf = new ElfFake(nullptr);
info->elf = elf;
elf->FakeSetInterface(new ElfInterfaceFake(nullptr));
maps_.FakeAddMapInfo(info);
info = new MapInfo(0x43000, 0x44000, 0x1d000, PROT_READ | PROT_WRITE, "/fake/fake.apk");
elf = new ElfFake(nullptr);
info->elf = elf;
elf->FakeSetInterface(new ElfInterfaceFake(nullptr));
maps_.FakeAddMapInfo(info);
info = new MapInfo(0x53000, 0x54000, 0, PROT_READ | PROT_WRITE, "/fake/fake.oat");
maps_.FakeAddMapInfo(info);
}
void SetUp() override {
ElfInterfaceFake::FakeClear();
regs_.FakeSetMachineType(EM_ARM);
regs_.FakeSetReturnAddressValid(false);
}
static MapsFake maps_;
static RegsFake regs_;
static std::shared_ptr<Memory> process_memory_;
};
MapsFake UnwinderTest::maps_;
RegsFake UnwinderTest::regs_(5, 0);
std::shared_ptr<Memory> UnwinderTest::process_memory_(nullptr);
TEST_F(UnwinderTest, multiple_frames) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame1", 1));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame2", 2));
regs_.FakeSetPc(0x1000);
regs_.FakeSetSp(0x10000);
ElfInterfaceFake::FakePushStepData(StepData(0x1102, 0x10010, false));
ElfInterfaceFake::FakePushStepData(StepData(0x1202, 0x10020, false));
ElfInterfaceFake::FakePushStepData(StepData(0, 0, true));
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(3U, unwinder.NumFrames());
auto* frame = &unwinder.frames()[0];
EXPECT_EQ(0U, frame->num);
EXPECT_EQ(0U, frame->rel_pc);
EXPECT_EQ(0x1000U, frame->pc);
EXPECT_EQ(0x10000U, frame->sp);
EXPECT_EQ("Frame0", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("/system/fake/libc.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x1000U, frame->map_start);
EXPECT_EQ(0x8000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
frame = &unwinder.frames()[1];
EXPECT_EQ(1U, frame->num);
EXPECT_EQ(0x100U, frame->rel_pc);
EXPECT_EQ(0x1100U, frame->pc);
EXPECT_EQ(0x10010U, frame->sp);
EXPECT_EQ("Frame1", frame->function_name);
EXPECT_EQ(1U, frame->function_offset);
EXPECT_EQ("/system/fake/libc.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x1000U, frame->map_start);
EXPECT_EQ(0x8000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
frame = &unwinder.frames()[2];
EXPECT_EQ(2U, frame->num);
EXPECT_EQ(0x200U, frame->rel_pc);
EXPECT_EQ(0x1200U, frame->pc);
EXPECT_EQ(0x10020U, frame->sp);
EXPECT_EQ("Frame2", frame->function_name);
EXPECT_EQ(2U, frame->function_offset);
EXPECT_EQ("/system/fake/libc.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x1000U, frame->map_start);
EXPECT_EQ(0x8000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
}
TEST_F(UnwinderTest, non_zero_map_offset) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
regs_.FakeSetPc(0x43000);
regs_.FakeSetSp(0x10000);
ElfInterfaceFake::FakePushStepData(StepData(0, 0, true));
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(1U, unwinder.NumFrames());
auto* frame = &unwinder.frames()[0];
EXPECT_EQ(0U, frame->num);
EXPECT_EQ(0U, frame->rel_pc);
EXPECT_EQ(0x43000U, frame->pc);
EXPECT_EQ(0x10000U, frame->sp);
EXPECT_EQ("Frame0", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("/fake/fake.apk", frame->map_name);
EXPECT_EQ(0x1d000U, frame->map_offset);
EXPECT_EQ(0x43000U, frame->map_start);
EXPECT_EQ(0x44000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
}
// Verify that no attempt to continue after the step indicates it is done.
TEST_F(UnwinderTest, no_frames_after_finished) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame1", 1));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame2", 2));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame3", 3));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame4", 4));
regs_.FakeSetPc(0x1000);
regs_.FakeSetSp(0x10000);
ElfInterfaceFake::FakePushStepData(StepData(0x1000, 0x10000, true));
ElfInterfaceFake::FakePushStepData(StepData(0x1102, 0x10010, false));
ElfInterfaceFake::FakePushStepData(StepData(0x1202, 0x10020, false));
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(1U, unwinder.NumFrames());
auto* frame = &unwinder.frames()[0];
EXPECT_EQ(0U, frame->num);
EXPECT_EQ(0U, frame->rel_pc);
EXPECT_EQ(0x1000U, frame->pc);
EXPECT_EQ(0x10000U, frame->sp);
EXPECT_EQ("Frame0", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("/system/fake/libc.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x1000U, frame->map_start);
EXPECT_EQ(0x8000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
}
// Verify the maximum frames to save.
TEST_F(UnwinderTest, max_frames) {
for (size_t i = 0; i < 30; i++) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame" + std::to_string(i), i));
ElfInterfaceFake::FakePushStepData(StepData(0x1102 + i * 0x100, 0x10010 + i * 0x10, false));
}
regs_.FakeSetPc(0x1000);
regs_.FakeSetSp(0x10000);
Unwinder unwinder(20, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(20U, unwinder.NumFrames());
for (size_t i = 0; i < 20; i++) {
auto* frame = &unwinder.frames()[i];
EXPECT_EQ(i, frame->num);
EXPECT_EQ(i * 0x100, frame->rel_pc) << "Failed at frame " << i;
EXPECT_EQ(0x1000 + i * 0x100, frame->pc) << "Failed at frame " << i;
EXPECT_EQ(0x10000 + 0x10 * i, frame->sp) << "Failed at frame " << i;
EXPECT_EQ("Frame" + std::to_string(i), frame->function_name) << "Failed at frame " << i;
EXPECT_EQ(i, frame->function_offset) << "Failed at frame " << i;
EXPECT_EQ("/system/fake/libc.so", frame->map_name) << "Failed at frame " << i;
EXPECT_EQ(0U, frame->map_offset) << "Failed at frame " << i;
EXPECT_EQ(0x1000U, frame->map_start) << "Failed at frame " << i;
EXPECT_EQ(0x8000U, frame->map_end) << "Failed at frame " << i;
EXPECT_EQ(0U, frame->map_load_bias) << "Failed at frame " << i;
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags) << "Failed at frame " << i;
}
}
// Verify that initial map names frames are removed.
TEST_F(UnwinderTest, verify_frames_skipped) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame1", 1));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame2", 2));
regs_.FakeSetPc(0x20000);
regs_.FakeSetSp(0x10000);
ElfInterfaceFake::FakePushStepData(StepData(0x23002, 0x10010, false));
ElfInterfaceFake::FakePushStepData(StepData(0x23102, 0x10020, false));
ElfInterfaceFake::FakePushStepData(StepData(0x20002, 0x10030, false));
ElfInterfaceFake::FakePushStepData(StepData(0x21002, 0x10040, false));
ElfInterfaceFake::FakePushStepData(StepData(0x1002, 0x10050, false));
ElfInterfaceFake::FakePushStepData(StepData(0x21002, 0x10060, false));
ElfInterfaceFake::FakePushStepData(StepData(0x23002, 0x10070, false));
ElfInterfaceFake::FakePushStepData(StepData(0, 0, true));
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
std::vector<std::string> skip_libs{"libunwind.so", "libanother.so"};
unwinder.Unwind(&skip_libs);
ASSERT_EQ(3U, unwinder.NumFrames());
auto* frame = &unwinder.frames()[0];
EXPECT_EQ(0U, frame->num);
EXPECT_EQ(0U, frame->rel_pc);
EXPECT_EQ(0x1000U, frame->pc);
EXPECT_EQ(0x10050U, frame->sp);
EXPECT_EQ("Frame0", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("/system/fake/libc.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x1000U, frame->map_start);
EXPECT_EQ(0x8000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
frame = &unwinder.frames()[1];
EXPECT_EQ(1U, frame->num);
EXPECT_EQ(0x1000U, frame->rel_pc);
EXPECT_EQ(0x21000U, frame->pc);
EXPECT_EQ(0x10060U, frame->sp);
EXPECT_EQ("Frame1", frame->function_name);
EXPECT_EQ(1U, frame->function_offset);
EXPECT_EQ("/system/fake/libunwind.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x20000U, frame->map_start);
EXPECT_EQ(0x22000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
frame = &unwinder.frames()[2];
EXPECT_EQ(2U, frame->num);
EXPECT_EQ(0U, frame->rel_pc);
EXPECT_EQ(0x23000U, frame->pc);
EXPECT_EQ(0x10070U, frame->sp);
EXPECT_EQ("Frame2", frame->function_name);
EXPECT_EQ(2U, frame->function_offset);
EXPECT_EQ("/fake/libanother.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x23000U, frame->map_start);
EXPECT_EQ(0x24000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
}
// Verify SP in a non-existant map is okay.
TEST_F(UnwinderTest, sp_not_in_map) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame1", 1));
regs_.FakeSetPc(0x1000);
regs_.FakeSetSp(0x63000);
ElfInterfaceFake::FakePushStepData(StepData(0x21002, 0x50020, false));
ElfInterfaceFake::FakePushStepData(StepData(0, 0, true));
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(2U, unwinder.NumFrames());
auto* frame = &unwinder.frames()[0];
EXPECT_EQ(0U, frame->num);
EXPECT_EQ(0U, frame->rel_pc);
EXPECT_EQ(0x1000U, frame->pc);
EXPECT_EQ(0x63000U, frame->sp);
EXPECT_EQ("Frame0", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("/system/fake/libc.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x1000U, frame->map_start);
EXPECT_EQ(0x8000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
frame = &unwinder.frames()[1];
EXPECT_EQ(1U, frame->num);
EXPECT_EQ(0x1000U, frame->rel_pc);
EXPECT_EQ(0x21000U, frame->pc);
EXPECT_EQ(0x50020U, frame->sp);
EXPECT_EQ("Frame1", frame->function_name);
EXPECT_EQ(1U, frame->function_offset);
EXPECT_EQ("/system/fake/libunwind.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x20000U, frame->map_start);
EXPECT_EQ(0x22000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
}
// Verify PC in a device stops the unwind.
TEST_F(UnwinderTest, pc_in_device_stops_unwind) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame1", 1));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame2", 2));
regs_.FakeSetPc(0x13000);
regs_.FakeSetSp(0x10000);
ElfInterfaceFake::FakePushStepData(StepData(0x23002, 0x10010, false));
ElfInterfaceFake::FakePushStepData(StepData(0x23102, 0x10020, false));
ElfInterfaceFake::FakePushStepData(StepData(0, 0, true));
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(1U, unwinder.NumFrames());
}
// Verify SP in a device stops the unwind.
TEST_F(UnwinderTest, sp_in_device_stops_unwind) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame1", 1));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame2", 2));
regs_.FakeSetPc(0x1000);
regs_.FakeSetSp(0x13000);
ElfInterfaceFake::FakePushStepData(StepData(0x23002, 0x10010, false));
ElfInterfaceFake::FakePushStepData(StepData(0x23102, 0x10020, false));
ElfInterfaceFake::FakePushStepData(StepData(0, 0, true));
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(1U, unwinder.NumFrames());
}
// Verify a no map info frame gets a frame.
TEST_F(UnwinderTest, pc_without_map) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
regs_.FakeSetPc(0x41000);
regs_.FakeSetSp(0x13000);
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(1U, unwinder.NumFrames());
auto* frame = &unwinder.frames()[0];
EXPECT_EQ(0U, frame->num);
EXPECT_EQ(0x41000U, frame->rel_pc);
EXPECT_EQ(0x41000U, frame->pc);
EXPECT_EQ(0x13000U, frame->sp);
EXPECT_EQ("", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0U, frame->map_start);
EXPECT_EQ(0U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(0, frame->map_flags);
}
// Verify that a speculative frame is added.
TEST_F(UnwinderTest, speculative_frame) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame1", 1));
// Fake as if code called a nullptr function.
regs_.FakeSetPc(0);
regs_.FakeSetSp(0x10000);
regs_.FakeSetReturnAddress(0x1202);
regs_.FakeSetReturnAddressValid(true);
ElfInterfaceFake::FakePushStepData(StepData(0x23102, 0x10020, false));
ElfInterfaceFake::FakePushStepData(StepData(0, 0, true));
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(3U, unwinder.NumFrames());
auto* frame = &unwinder.frames()[0];
EXPECT_EQ(0U, frame->num);
EXPECT_EQ(0U, frame->rel_pc);
EXPECT_EQ(0U, frame->pc);
EXPECT_EQ(0x10000U, frame->sp);
EXPECT_EQ("", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0U, frame->map_start);
EXPECT_EQ(0U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(0, frame->map_flags);
frame = &unwinder.frames()[1];
EXPECT_EQ(1U, frame->num);
EXPECT_EQ(0x200U, frame->rel_pc);
EXPECT_EQ(0x1200U, frame->pc);
EXPECT_EQ(0x10000U, frame->sp);
EXPECT_EQ("Frame0", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("/system/fake/libc.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x1000U, frame->map_start);
EXPECT_EQ(0x8000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
frame = &unwinder.frames()[2];
EXPECT_EQ(2U, frame->num);
EXPECT_EQ(0x100U, frame->rel_pc);
EXPECT_EQ(0x23100U, frame->pc);
EXPECT_EQ(0x10020U, frame->sp);
EXPECT_EQ("Frame1", frame->function_name);
EXPECT_EQ(1U, frame->function_offset);
EXPECT_EQ("/fake/libanother.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x23000U, frame->map_start);
EXPECT_EQ(0x24000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
}
// Verify that a speculative frame is added then removed because no other
// frames are added.
TEST_F(UnwinderTest, speculative_frame_removed) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame1", 1));
// Fake as if code called a nullptr function.
regs_.FakeSetPc(0);
regs_.FakeSetSp(0x10000);
regs_.FakeSetReturnAddress(0x1202);
regs_.FakeSetReturnAddressValid(true);
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(1U, unwinder.NumFrames());
auto* frame = &unwinder.frames()[0];
EXPECT_EQ(0U, frame->num);
EXPECT_EQ(0U, frame->rel_pc);
EXPECT_EQ(0U, frame->pc);
EXPECT_EQ(0x10000U, frame->sp);
EXPECT_EQ("", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0U, frame->map_start);
EXPECT_EQ(0U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(0, frame->map_flags);
}
// Verify that an unwind stops when a frame is in given suffix.
TEST_F(UnwinderTest, map_ignore_suffixes) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame1", 1));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame2", 2));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame3", 3));
// Fake as if code called a nullptr function.
regs_.FakeSetPc(0x1000);
regs_.FakeSetSp(0x10000);
ElfInterfaceFake::FakePushStepData(StepData(0x43402, 0x10010, false));
ElfInterfaceFake::FakePushStepData(StepData(0x53502, 0x10020, false));
ElfInterfaceFake::FakePushStepData(StepData(0, 0, true));
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
std::vector<std::string> suffixes{"oat"};
unwinder.Unwind(nullptr, &suffixes);
ASSERT_EQ(2U, unwinder.NumFrames());
// Make sure the elf was not initialized.
MapInfo* map_info = maps_.Find(0x53000);
ASSERT_TRUE(map_info != nullptr);
EXPECT_TRUE(map_info->elf == nullptr);
auto* frame = &unwinder.frames()[0];
EXPECT_EQ(0U, frame->num);
EXPECT_EQ(0U, frame->rel_pc);
EXPECT_EQ(0x1000U, frame->pc);
EXPECT_EQ(0x10000U, frame->sp);
EXPECT_EQ("Frame0", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("/system/fake/libc.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x1000U, frame->map_start);
EXPECT_EQ(0x8000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
frame = &unwinder.frames()[1];
EXPECT_EQ(1U, frame->num);
EXPECT_EQ(0x400U, frame->rel_pc);
EXPECT_EQ(0x43400U, frame->pc);
EXPECT_EQ(0x10010U, frame->sp);
EXPECT_EQ("Frame1", frame->function_name);
EXPECT_EQ(1U, frame->function_offset);
EXPECT_EQ("/fake/fake.apk", frame->map_name);
EXPECT_EQ(0x1d000U, frame->map_offset);
EXPECT_EQ(0x43000U, frame->map_start);
EXPECT_EQ(0x44000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
}
// Verify that an unwind stops when the sp and pc don't change.
TEST_F(UnwinderTest, sp_pc_do_not_change) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 0));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame1", 1));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame2", 2));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame3", 3));
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame4", 4));
regs_.FakeSetPc(0x1000);
regs_.FakeSetSp(0x10000);
ElfInterfaceFake::FakePushStepData(StepData(0x33402, 0x10010, false));
ElfInterfaceFake::FakePushStepData(StepData(0x33502, 0x10020, false));
ElfInterfaceFake::FakePushStepData(StepData(0x33502, 0x10020, false));
ElfInterfaceFake::FakePushStepData(StepData(0x33502, 0x10020, false));
ElfInterfaceFake::FakePushStepData(StepData(0x33502, 0x10020, false));
ElfInterfaceFake::FakePushStepData(StepData(0, 0, true));
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(3U, unwinder.NumFrames());
auto* frame = &unwinder.frames()[0];
EXPECT_EQ(0U, frame->num);
EXPECT_EQ(0U, frame->rel_pc);
EXPECT_EQ(0x1000U, frame->pc);
EXPECT_EQ(0x10000U, frame->sp);
EXPECT_EQ("Frame0", frame->function_name);
EXPECT_EQ(0U, frame->function_offset);
EXPECT_EQ("/system/fake/libc.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x1000U, frame->map_start);
EXPECT_EQ(0x8000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
frame = &unwinder.frames()[1];
EXPECT_EQ(1U, frame->num);
EXPECT_EQ(0x400U, frame->rel_pc);
EXPECT_EQ(0x33400U, frame->pc);
EXPECT_EQ(0x10010U, frame->sp);
EXPECT_EQ("Frame1", frame->function_name);
EXPECT_EQ(1U, frame->function_offset);
EXPECT_EQ("/fake/compressed.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x33000U, frame->map_start);
EXPECT_EQ(0x34000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
frame = &unwinder.frames()[2];
EXPECT_EQ(2U, frame->num);
EXPECT_EQ(0x500U, frame->rel_pc);
EXPECT_EQ(0x33500U, frame->pc);
EXPECT_EQ(0x10020U, frame->sp);
EXPECT_EQ("Frame2", frame->function_name);
EXPECT_EQ(2U, frame->function_offset);
EXPECT_EQ("/fake/compressed.so", frame->map_name);
EXPECT_EQ(0U, frame->map_offset);
EXPECT_EQ(0x33000U, frame->map_start);
EXPECT_EQ(0x34000U, frame->map_end);
EXPECT_EQ(0U, frame->map_load_bias);
EXPECT_EQ(PROT_READ | PROT_WRITE, frame->map_flags);
}
// Verify format frame code.
TEST_F(UnwinderTest, format_frame_static) {
FrameData frame;
frame.num = 1;
frame.rel_pc = 0x1000;
frame.pc = 0x4000;
frame.sp = 0x1000;
frame.function_name = "function";
frame.function_offset = 100;
frame.map_name = "/fake/libfake.so";
frame.map_offset = 0x2000;
frame.map_start = 0x3000;
frame.map_end = 0x6000;
frame.map_flags = PROT_READ;
EXPECT_EQ(" #01 pc 0000000000001000 (offset 0x2000) /fake/libfake.so (function+100)",
Unwinder::FormatFrame(frame, false));
EXPECT_EQ(" #01 pc 00001000 (offset 0x2000) /fake/libfake.so (function+100)",
Unwinder::FormatFrame(frame, true));
frame.map_offset = 0;
EXPECT_EQ(" #01 pc 0000000000001000 /fake/libfake.so (function+100)",
Unwinder::FormatFrame(frame, false));
EXPECT_EQ(" #01 pc 00001000 /fake/libfake.so (function+100)",
Unwinder::FormatFrame(frame, true));
frame.function_offset = 0;
EXPECT_EQ(" #01 pc 0000000000001000 /fake/libfake.so (function)",
Unwinder::FormatFrame(frame, false));
EXPECT_EQ(" #01 pc 00001000 /fake/libfake.so (function)", Unwinder::FormatFrame(frame, true));
frame.function_name = "";
EXPECT_EQ(" #01 pc 0000000000001000 /fake/libfake.so", Unwinder::FormatFrame(frame, false));
EXPECT_EQ(" #01 pc 00001000 /fake/libfake.so", Unwinder::FormatFrame(frame, true));
frame.map_name = "";
EXPECT_EQ(" #01 pc 0000000000001000 <anonymous:3000>", Unwinder::FormatFrame(frame, false));
EXPECT_EQ(" #01 pc 00001000 <anonymous:3000>", Unwinder::FormatFrame(frame, true));
frame.map_start = 0;
frame.map_end = 0;
EXPECT_EQ(" #01 pc 0000000000001000 <unknown>", Unwinder::FormatFrame(frame, false));
EXPECT_EQ(" #01 pc 00001000 <unknown>", Unwinder::FormatFrame(frame, true));
}
// Verify format frame code.
TEST_F(UnwinderTest, format_frame) {
ElfInterfaceFake::FakePushFunctionData(FunctionData("Frame0", 10));
regs_.FakeSetPc(0x2300);
regs_.FakeSetSp(0x10000);
Unwinder unwinder(64, &maps_, &regs_, process_memory_);
unwinder.Unwind();
ASSERT_EQ(1U, unwinder.NumFrames());
regs_.FakeSetMachineType(EM_ARM);
EXPECT_EQ(" #00 pc 00001300 /system/fake/libc.so (Frame0+10)", unwinder.FormatFrame(0));
regs_.FakeSetMachineType(EM_386);
EXPECT_EQ(" #00 pc 00001300 /system/fake/libc.so (Frame0+10)", unwinder.FormatFrame(0));
regs_.FakeSetMachineType(EM_AARCH64);
EXPECT_EQ(" #00 pc 0000000000001300 /system/fake/libc.so (Frame0+10)", unwinder.FormatFrame(0));
regs_.FakeSetMachineType(EM_X86_64);
EXPECT_EQ(" #00 pc 0000000000001300 /system/fake/libc.so (Frame0+10)", unwinder.FormatFrame(0));
EXPECT_EQ("", unwinder.FormatFrame(1));
}
} // namespace unwindstack
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