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android_system_core/libunwindstack/tests/ArmExidxExtractTest.cpp
Christopher Ferris 2fcf4cf13e Add error propagation into Unwinder/Elf objects. 
The backtrace offline code uses these error codes to diagnose errors.
In addtion, I've had cases where seeing these errors would help diagnose
failures.

This also allows us to add a few features to indicate why an unwind
terminated (such as max frames exceeded).

Bug: 65682279

Test: Updated unit tests pass.
Change-Id: If82b5092698e8a194016d670efff1320f9b44d50
2018-01-24 17:50:46 -08:00

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/*
* Copyright (C) 2016 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 <stdint.h>
#include <deque>
#include <vector>
#include <gtest/gtest.h>
#include <unwindstack/Log.h>
#include "ArmExidx.h"
#include "LogFake.h"
#include "MemoryFake.h"
namespace unwindstack {
class ArmExidxExtractTest : public ::testing::Test {
protected:
void SetUp() override {
ResetLogs();
elf_memory_.Clear();
exidx_ = new ArmExidx(nullptr, &elf_memory_, nullptr);
data_ = exidx_->data();
data_->clear();
}
void TearDown() override {
delete exidx_;
}
ArmExidx* exidx_ = nullptr;
std::deque<uint8_t>* data_;
MemoryFake elf_memory_;
};
TEST_F(ArmExidxExtractTest, bad_alignment) {
ASSERT_FALSE(exidx_->ExtractEntryData(0x1001));
ASSERT_EQ(ARM_STATUS_INVALID_ALIGNMENT, exidx_->status());
ASSERT_TRUE(data_->empty());
}
TEST_F(ArmExidxExtractTest, cant_unwind) {
elf_memory_.SetData32(0x1000, 0x7fff2340);
elf_memory_.SetData32(0x1004, 1);
ASSERT_FALSE(exidx_->ExtractEntryData(0x1000));
ASSERT_EQ(ARM_STATUS_NO_UNWIND, exidx_->status());
ASSERT_TRUE(data_->empty());
}
TEST_F(ArmExidxExtractTest, compact) {
elf_memory_.SetData32(0x4000, 0x7ffa3000);
elf_memory_.SetData32(0x4004, 0x80a8b0b0);
ASSERT_TRUE(exidx_->ExtractEntryData(0x4000));
ASSERT_EQ(3U, data_->size());
ASSERT_EQ(0xa8, data_->at(0));
ASSERT_EQ(0xb0, data_->at(1));
ASSERT_EQ(0xb0, data_->at(2));
// Missing finish gets added.
elf_memory_.Clear();
elf_memory_.SetData32(0x534, 0x7ffa3000);
elf_memory_.SetData32(0x538, 0x80a1a2a3);
ASSERT_TRUE(exidx_->ExtractEntryData(0x534));
ASSERT_EQ(4U, data_->size());
ASSERT_EQ(0xa1, data_->at(0));
ASSERT_EQ(0xa2, data_->at(1));
ASSERT_EQ(0xa3, data_->at(2));
ASSERT_EQ(0xb0, data_->at(3));
}
TEST_F(ArmExidxExtractTest, compact_non_zero_personality) {
elf_memory_.SetData32(0x4000, 0x7ffa3000);
uint32_t compact_value = 0x80a8b0b0;
for (size_t i = 1; i < 16; i++) {
elf_memory_.SetData32(0x4004, compact_value | (i << 24));
ASSERT_FALSE(exidx_->ExtractEntryData(0x4000));
ASSERT_EQ(ARM_STATUS_INVALID_PERSONALITY, exidx_->status());
}
}
TEST_F(ArmExidxExtractTest, second_read_compact_personality_1_2) {
elf_memory_.SetData32(0x5000, 0x1234);
elf_memory_.SetData32(0x5004, 0x00001230);
elf_memory_.SetData32(0x6234, 0x8100f3b0);
ASSERT_TRUE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(2U, data_->size());
ASSERT_EQ(0xf3, data_->at(0));
ASSERT_EQ(0xb0, data_->at(1));
elf_memory_.Clear();
elf_memory_.SetData32(0x5000, 0x1234);
elf_memory_.SetData32(0x5004, 0x00001230);
elf_memory_.SetData32(0x6234, 0x8200f3f4);
ASSERT_TRUE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(3U, data_->size());
ASSERT_EQ(0xf3, data_->at(0));
ASSERT_EQ(0xf4, data_->at(1));
ASSERT_EQ(0xb0, data_->at(2));
elf_memory_.Clear();
elf_memory_.SetData32(0x5000, 0x1234);
elf_memory_.SetData32(0x5004, 0x00001230);
elf_memory_.SetData32(0x6234, 0x8201f3f4);
elf_memory_.SetData32(0x6238, 0x102030b0);
ASSERT_TRUE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(6U, data_->size());
ASSERT_EQ(0xf3, data_->at(0));
ASSERT_EQ(0xf4, data_->at(1));
ASSERT_EQ(0x10, data_->at(2));
ASSERT_EQ(0x20, data_->at(3));
ASSERT_EQ(0x30, data_->at(4));
ASSERT_EQ(0xb0, data_->at(5));
elf_memory_.Clear();
elf_memory_.SetData32(0x5000, 0x1234);
elf_memory_.SetData32(0x5004, 0x00001230);
elf_memory_.SetData32(0x6234, 0x8103f3f4);
elf_memory_.SetData32(0x6238, 0x10203040);
elf_memory_.SetData32(0x623c, 0x50607080);
elf_memory_.SetData32(0x6240, 0x90a0c0d0);
ASSERT_TRUE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(15U, data_->size());
ASSERT_EQ(0xf3, data_->at(0));
ASSERT_EQ(0xf4, data_->at(1));
ASSERT_EQ(0x10, data_->at(2));
ASSERT_EQ(0x20, data_->at(3));
ASSERT_EQ(0x30, data_->at(4));
ASSERT_EQ(0x40, data_->at(5));
ASSERT_EQ(0x50, data_->at(6));
ASSERT_EQ(0x60, data_->at(7));
ASSERT_EQ(0x70, data_->at(8));
ASSERT_EQ(0x80, data_->at(9));
ASSERT_EQ(0x90, data_->at(10));
ASSERT_EQ(0xa0, data_->at(11));
ASSERT_EQ(0xc0, data_->at(12));
ASSERT_EQ(0xd0, data_->at(13));
ASSERT_EQ(0xb0, data_->at(14));
}
TEST_F(ArmExidxExtractTest, second_read_compact_personality_illegal) {
elf_memory_.SetData32(0x5000, 0x7ffa1e48);
elf_memory_.SetData32(0x5004, 0x1230);
elf_memory_.SetData32(0x6234, 0x832132b0);
ASSERT_FALSE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(ARM_STATUS_INVALID_PERSONALITY, exidx_->status());
elf_memory_.Clear();
elf_memory_.SetData32(0x5000, 0x7ffa1e48);
elf_memory_.SetData32(0x5004, 0x1230);
elf_memory_.SetData32(0x6234, 0x842132b0);
ASSERT_FALSE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(ARM_STATUS_INVALID_PERSONALITY, exidx_->status());
}
TEST_F(ArmExidxExtractTest, second_read_offset_is_negative) {
elf_memory_.SetData32(0x5000, 0x7ffa1e48);
elf_memory_.SetData32(0x5004, 0x7fffb1e0);
elf_memory_.SetData32(0x1e4, 0x842132b0);
ASSERT_FALSE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(ARM_STATUS_INVALID_PERSONALITY, exidx_->status());
}
TEST_F(ArmExidxExtractTest, second_read_not_compact) {
elf_memory_.SetData32(0x5000, 0x1234);
elf_memory_.SetData32(0x5004, 0x00001230);
elf_memory_.SetData32(0x6234, 0x1);
elf_memory_.SetData32(0x6238, 0x001122b0);
ASSERT_TRUE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(3U, data_->size());
ASSERT_EQ(0x11, data_->at(0));
ASSERT_EQ(0x22, data_->at(1));
ASSERT_EQ(0xb0, data_->at(2));
elf_memory_.Clear();
elf_memory_.SetData32(0x5000, 0x1234);
elf_memory_.SetData32(0x5004, 0x00001230);
elf_memory_.SetData32(0x6234, 0x2);
elf_memory_.SetData32(0x6238, 0x00112233);
ASSERT_TRUE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(4U, data_->size());
ASSERT_EQ(0x11, data_->at(0));
ASSERT_EQ(0x22, data_->at(1));
ASSERT_EQ(0x33, data_->at(2));
ASSERT_EQ(0xb0, data_->at(3));
elf_memory_.Clear();
elf_memory_.SetData32(0x5000, 0x1234);
elf_memory_.SetData32(0x5004, 0x00001230);
elf_memory_.SetData32(0x6234, 0x3);
elf_memory_.SetData32(0x6238, 0x01112233);
elf_memory_.SetData32(0x623c, 0x445566b0);
ASSERT_TRUE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(7U, data_->size());
ASSERT_EQ(0x11, data_->at(0));
ASSERT_EQ(0x22, data_->at(1));
ASSERT_EQ(0x33, data_->at(2));
ASSERT_EQ(0x44, data_->at(3));
ASSERT_EQ(0x55, data_->at(4));
ASSERT_EQ(0x66, data_->at(5));
ASSERT_EQ(0xb0, data_->at(6));
elf_memory_.Clear();
elf_memory_.SetData32(0x5000, 0x1234);
elf_memory_.SetData32(0x5004, 0x00001230);
elf_memory_.SetData32(0x6234, 0x3);
elf_memory_.SetData32(0x6238, 0x05112233);
elf_memory_.SetData32(0x623c, 0x01020304);
elf_memory_.SetData32(0x6240, 0x05060708);
elf_memory_.SetData32(0x6244, 0x090a0b0c);
elf_memory_.SetData32(0x6248, 0x0d0e0f10);
elf_memory_.SetData32(0x624c, 0x11121314);
ASSERT_TRUE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(24U, data_->size());
ASSERT_EQ(0x11, data_->at(0));
ASSERT_EQ(0x22, data_->at(1));
ASSERT_EQ(0x33, data_->at(2));
ASSERT_EQ(0x01, data_->at(3));
ASSERT_EQ(0x02, data_->at(4));
ASSERT_EQ(0x03, data_->at(5));
ASSERT_EQ(0x04, data_->at(6));
ASSERT_EQ(0x05, data_->at(7));
ASSERT_EQ(0x06, data_->at(8));
ASSERT_EQ(0x07, data_->at(9));
ASSERT_EQ(0x08, data_->at(10));
ASSERT_EQ(0x09, data_->at(11));
ASSERT_EQ(0x0a, data_->at(12));
ASSERT_EQ(0x0b, data_->at(13));
ASSERT_EQ(0x0c, data_->at(14));
ASSERT_EQ(0x0d, data_->at(15));
ASSERT_EQ(0x0e, data_->at(16));
ASSERT_EQ(0x0f, data_->at(17));
ASSERT_EQ(0x10, data_->at(18));
ASSERT_EQ(0x11, data_->at(19));
ASSERT_EQ(0x12, data_->at(20));
ASSERT_EQ(0x13, data_->at(21));
ASSERT_EQ(0x14, data_->at(22));
ASSERT_EQ(0xb0, data_->at(23));
}
TEST_F(ArmExidxExtractTest, read_failures) {
ASSERT_FALSE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(ARM_STATUS_READ_FAILED, exidx_->status());
EXPECT_EQ(0x5004U, exidx_->status_address());
elf_memory_.SetData32(0x5000, 0x100);
ASSERT_FALSE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(ARM_STATUS_READ_FAILED, exidx_->status());
EXPECT_EQ(0x5004U, exidx_->status_address());
elf_memory_.SetData32(0x5004, 0x100);
ASSERT_FALSE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(ARM_STATUS_READ_FAILED, exidx_->status());
EXPECT_EQ(0x5104U, exidx_->status_address());
elf_memory_.SetData32(0x5104, 0x1);
ASSERT_FALSE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(ARM_STATUS_READ_FAILED, exidx_->status());
EXPECT_EQ(0x5108U, exidx_->status_address());
elf_memory_.SetData32(0x5108, 0x01010203);
ASSERT_FALSE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(ARM_STATUS_READ_FAILED, exidx_->status());
EXPECT_EQ(0x510cU, exidx_->status_address());
}
TEST_F(ArmExidxExtractTest, malformed) {
elf_memory_.SetData32(0x5000, 0x100);
elf_memory_.SetData32(0x5004, 0x100);
elf_memory_.SetData32(0x5104, 0x1);
elf_memory_.SetData32(0x5108, 0x06010203);
ASSERT_FALSE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(ARM_STATUS_MALFORMED, exidx_->status());
elf_memory_.Clear();
elf_memory_.SetData32(0x5000, 0x100);
elf_memory_.SetData32(0x5004, 0x100);
elf_memory_.SetData32(0x5104, 0x1);
elf_memory_.SetData32(0x5108, 0x81060203);
ASSERT_FALSE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ(ARM_STATUS_MALFORMED, exidx_->status());
}
TEST_F(ArmExidxExtractTest, cant_unwind_log) {
elf_memory_.SetData32(0x1000, 0x7fff2340);
elf_memory_.SetData32(0x1004, 1);
exidx_->set_log(true);
exidx_->set_log_indent(0);
exidx_->set_log_skip_execution(false);
ASSERT_FALSE(exidx_->ExtractEntryData(0x1000));
ASSERT_EQ(ARM_STATUS_NO_UNWIND, exidx_->status());
ASSERT_EQ("4 unwind Raw Data: 0x00 0x00 0x00 0x01\n"
"4 unwind [cantunwind]\n", GetFakeLogPrint());
}
TEST_F(ArmExidxExtractTest, raw_data_compact) {
elf_memory_.SetData32(0x4000, 0x7ffa3000);
elf_memory_.SetData32(0x4004, 0x80a8b0b0);
exidx_->set_log(true);
exidx_->set_log_indent(0);
exidx_->set_log_skip_execution(false);
ASSERT_TRUE(exidx_->ExtractEntryData(0x4000));
ASSERT_EQ("4 unwind Raw Data: 0xa8 0xb0 0xb0\n", GetFakeLogPrint());
}
TEST_F(ArmExidxExtractTest, raw_data_non_compact) {
elf_memory_.SetData32(0x5000, 0x1234);
elf_memory_.SetData32(0x5004, 0x00001230);
elf_memory_.SetData32(0x6234, 0x2);
elf_memory_.SetData32(0x6238, 0x00112233);
exidx_->set_log(true);
exidx_->set_log_indent(0);
exidx_->set_log_skip_execution(false);
ASSERT_TRUE(exidx_->ExtractEntryData(0x5000));
ASSERT_EQ("4 unwind Raw Data: 0x11 0x22 0x33 0xb0\n", GetFakeLogPrint());
}
} // namespace unwindstack
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