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platform_system_core/libunwindstack/tests/DwarfSectionImplTest.cpp
Christopher Ferris b9de87f7ed Add a new unwind method on error. 
If a function crashes by jumping into unexecutable code, the old method
could not unwind through that. Add a fallback method to set the pc from
the default return address location.

In addition, add a new finished check for steps. This will provide a method
to indicate that this step is the last step. This prevents cases where
the fallback method might be triggered incorrectly.

Update the libbacktrace code to unwind using the new methodology.

Update the unwind tool to use the new unwind methodology.

Add a new option to crasher that calls through a null function.

Create a new object, Unwinder, that encapsulates the a basic unwind. For now,
libbacktrace will still use the custom code.

Added new unit tests to cover the new cases. Also add a test that
crashes calling a nullptr as a function, and then has call frames in
the signal stack.

Bug: 65842173

Test: Pass all unit tests, verify crasher dumps properly.
Change-Id: Ia18430ab107e9f7bdf0e14a9b74710b1280bd7f4
2017-09-22 16:55:12 -07:00

868 lines
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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 <gmock/gmock.h>
#include <gtest/gtest.h>
#include <unwindstack/DwarfSection.h>
#include "DwarfEncoding.h"
#include "DwarfError.h"
#include "LogFake.h"
#include "MemoryFake.h"
#include "RegsFake.h"
namespace unwindstack {
template <typename TypeParam>
class MockDwarfSectionImpl : public DwarfSectionImpl<TypeParam> {
public:
MockDwarfSectionImpl(Memory* memory) : DwarfSectionImpl<TypeParam>(memory) {}
virtual ~MockDwarfSectionImpl() = default;
MOCK_METHOD2(Init, bool(uint64_t, uint64_t));
MOCK_METHOD2(GetFdeOffsetFromPc, bool(uint64_t, uint64_t*));
MOCK_METHOD1(GetFdeFromIndex, const DwarfFde*(size_t));
MOCK_METHOD1(IsCie32, bool(uint32_t));
MOCK_METHOD1(IsCie64, bool(uint64_t));
MOCK_METHOD1(GetCieOffsetFromFde32, uint64_t(uint32_t));
MOCK_METHOD1(GetCieOffsetFromFde64, uint64_t(uint64_t));
MOCK_METHOD1(AdjustPcFromFde, uint64_t(uint64_t));
void TestSetCachedCieEntry(uint64_t offset, const DwarfCie& cie) {
this->cie_entries_[offset] = cie;
}
void TestClearCachedCieEntry() { this->cie_entries_.clear(); }
void TestSetCachedFdeEntry(uint64_t offset, const DwarfFde& fde) {
this->fde_entries_[offset] = fde;
}
void TestClearCachedFdeEntry() { this->fde_entries_.clear(); }
void TestSetCachedCieLocRegs(uint64_t offset, const dwarf_loc_regs_t& loc_regs) {
this->cie_loc_regs_[offset] = loc_regs;
}
void TestClearCachedCieLocRegs() { this->cie_loc_regs_.clear(); }
void TestClearError() { this->last_error_ = DWARF_ERROR_NONE; }
};
template <typename TypeParam>
class DwarfSectionImplTest : public ::testing::Test {
protected:
void SetUp() override {
memory_.Clear();
section_ = new MockDwarfSectionImpl<TypeParam>(&memory_);
ResetLogs();
}
void TearDown() override { delete section_; }
MemoryFake memory_;
MockDwarfSectionImpl<TypeParam>* section_ = nullptr;
};
TYPED_TEST_CASE_P(DwarfSectionImplTest);
// NOTE: All test class variables need to be referenced as this->.
TYPED_TEST_P(DwarfSectionImplTest, Eval_cfa_expr_eval_fail) {
DwarfCie cie{.version = 3, .return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x20;
regs[9] = 0x3000;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_EXPRESSION, {0x2, 0x5000}};
bool finished;
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_MEMORY_INVALID, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_cfa_expr_no_stack) {
DwarfCie cie{.version = 3, .return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x20;
regs[9] = 0x3000;
this->memory_.SetMemory(0x5000, std::vector<uint8_t>{0x96, 0x96, 0x96});
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_EXPRESSION, {0x2, 0x5000}};
bool finished;
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_ILLEGAL_STATE, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_cfa_expr) {
DwarfCie cie{.version = 3, .return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x20;
regs[9] = 0x3000;
this->memory_.SetMemory(0x5000, std::vector<uint8_t>{0x0c, 0x00, 0x00, 0x00, 0x80});
TypeParam cfa_value = 0x12345;
this->memory_.SetMemory(0x80000000, &cfa_value, sizeof(cfa_value));
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_EXPRESSION, {0x4, 0x5000}};
bool finished;
ASSERT_TRUE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_FALSE(finished);
EXPECT_EQ(0x12345U, regs.sp());
EXPECT_EQ(0x20U, regs.pc());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_cfa_val_expr) {
DwarfCie cie{.version = 3, .return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x20;
regs[9] = 0x3000;
this->memory_.SetMemory(0x5000, std::vector<uint8_t>{0x0c, 0x00, 0x00, 0x00, 0x80});
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_VAL_EXPRESSION, {0x4, 0x5000}};
bool finished;
ASSERT_TRUE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
ASSERT_FALSE(finished);
EXPECT_EQ(0x80000000U, regs.sp());
EXPECT_EQ(0x20U, regs.pc());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_cfa_expr_is_register) {
DwarfCie cie{.version = 3, .return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x20;
regs[9] = 0x3000;
this->memory_.SetMemory(0x5000, std::vector<uint8_t>{0x50, 0x96, 0x96});
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_EXPRESSION, {0x2, 0x5000}};
bool finished;
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_NOT_IMPLEMENTED, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_bad_regs) {
DwarfCie cie{.return_address_register = 60};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
bool finished;
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_ILLEGAL_VALUE, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_no_cfa) {
DwarfCie cie{.return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
bool finished;
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_CFA_NOT_DEFINED, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_cfa_bad) {
DwarfCie cie{.return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {20, 0}};
bool finished;
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_ILLEGAL_VALUE, this->section_->last_error());
this->section_->TestClearError();
loc_regs.erase(CFA_REG);
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_INVALID, {0, 0}};
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_ILLEGAL_VALUE, this->section_->last_error());
this->section_->TestClearError();
loc_regs.erase(CFA_REG);
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_OFFSET, {0, 0}};
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_ILLEGAL_VALUE, this->section_->last_error());
this->section_->TestClearError();
loc_regs.erase(CFA_REG);
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_VAL_OFFSET, {0, 0}};
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_ILLEGAL_VALUE, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_cfa_register_prev) {
DwarfCie cie{.return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x20;
regs[9] = 0x3000;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {9, 0}};
bool finished;
ASSERT_TRUE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_FALSE(finished);
EXPECT_EQ(0x20U, regs.pc());
EXPECT_EQ(0x2000U, regs.sp());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_cfa_register_from_value) {
DwarfCie cie{.return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x20;
regs[6] = 0x4000;
regs[9] = 0x3000;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {6, 0}};
bool finished;
ASSERT_TRUE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_FALSE(finished);
EXPECT_EQ(0x20U, regs.pc());
EXPECT_EQ(0x4000U, regs.sp());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_double_indirection) {
DwarfCie cie{.return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[8] = 0x10;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {8, 0}};
loc_regs[1] = DwarfLocation{DWARF_LOCATION_REGISTER, {3, 0}};
loc_regs[9] = DwarfLocation{DWARF_LOCATION_REGISTER, {1, 0}};
bool finished;
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_ILLEGAL_STATE, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_invalid_register) {
DwarfCie cie{.return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[8] = 0x10;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {8, 0}};
loc_regs[1] = DwarfLocation{DWARF_LOCATION_REGISTER, {10, 0}};
bool finished;
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(DWARF_ERROR_ILLEGAL_VALUE, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_different_reg_locations) {
DwarfCie cie{.return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
if (sizeof(TypeParam) == sizeof(uint64_t)) {
this->memory_.SetData64(0x2150, 0x12345678abcdef00ULL);
} else {
this->memory_.SetData32(0x2150, 0x12345678);
}
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[3] = 0x234;
regs[5] = 0x10;
regs[8] = 0x2100;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {8, 0}};
loc_regs[1] = DwarfLocation{DWARF_LOCATION_VAL_OFFSET, {0x100, 0}};
loc_regs[2] = DwarfLocation{DWARF_LOCATION_OFFSET, {0x50, 0}};
loc_regs[3] = DwarfLocation{DWARF_LOCATION_UNDEFINED, {0, 0}};
bool finished;
ASSERT_TRUE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_FALSE(finished);
EXPECT_EQ(0x10U, regs.pc());
EXPECT_EQ(0x2100U, regs.sp());
EXPECT_EQ(0x2200U, regs[1]);
EXPECT_EQ(0x234U, regs[3]);
if (sizeof(TypeParam) == sizeof(uint64_t)) {
EXPECT_EQ(0x12345678abcdef00ULL, regs[2]);
} else {
EXPECT_EQ(0x12345678U, regs[2]);
}
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_return_address_undefined) {
DwarfCie cie{.return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x20;
regs[8] = 0x10;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {8, 0}};
loc_regs[5] = DwarfLocation{DWARF_LOCATION_UNDEFINED, {0, 0}};
bool finished;
ASSERT_TRUE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_TRUE(finished);
EXPECT_EQ(0U, regs.pc());
EXPECT_EQ(0x10U, regs.sp());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_return_address) {
DwarfCie cie{.return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x20;
regs[8] = 0x10;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {8, 0}};
bool finished;
ASSERT_TRUE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_FALSE(finished);
EXPECT_EQ(0x20U, regs.pc());
EXPECT_EQ(0x10U, regs.sp());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_ignore_large_reg_loc) {
DwarfCie cie{.return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x20;
regs[8] = 0x10;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {8, 0}};
// This should not result in any errors.
loc_regs[20] = DwarfLocation{DWARF_LOCATION_REGISTER, {8, 0}};
bool finished;
ASSERT_TRUE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_FALSE(finished);
EXPECT_EQ(0x20U, regs.pc());
EXPECT_EQ(0x10U, regs.sp());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_reg_expr) {
DwarfCie cie{.version = 3, .return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[8] = 0x3000;
this->memory_.SetMemory(0x5000, std::vector<uint8_t>{0x0c, 0x00, 0x00, 0x00, 0x80});
TypeParam cfa_value = 0x12345;
this->memory_.SetMemory(0x80000000, &cfa_value, sizeof(cfa_value));
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {8, 0}};
loc_regs[5] = DwarfLocation{DWARF_LOCATION_EXPRESSION, {0x4, 0x5000}};
bool finished;
ASSERT_TRUE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_FALSE(finished);
EXPECT_EQ(0x3000U, regs.sp());
EXPECT_EQ(0x12345U, regs.pc());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_reg_val_expr) {
DwarfCie cie{.version = 3, .return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[8] = 0x3000;
this->memory_.SetMemory(0x5000, std::vector<uint8_t>{0x0c, 0x00, 0x00, 0x00, 0x80});
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {8, 0}};
loc_regs[5] = DwarfLocation{DWARF_LOCATION_VAL_EXPRESSION, {0x4, 0x5000}};
bool finished;
ASSERT_TRUE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_FALSE(finished);
EXPECT_EQ(0x3000U, regs.sp());
EXPECT_EQ(0x80000000U, regs.pc());
}
TYPED_TEST_P(DwarfSectionImplTest, Eval_same_cfa_same_pc) {
DwarfCie cie{.version = 3, .return_address_register = 5};
RegsFake<TypeParam> regs(10, 9);
dwarf_loc_regs_t loc_regs;
regs.set_pc(0x100);
regs.set_sp(0x2000);
regs[5] = 0x100;
regs[8] = 0x2000;
loc_regs[CFA_REG] = DwarfLocation{DWARF_LOCATION_REGISTER, {8, 0}};
bool finished;
ASSERT_FALSE(this->section_->Eval(&cie, &this->memory_, loc_regs, &regs, &finished));
EXPECT_EQ(0x2000U, regs.sp());
EXPECT_EQ(0x100U, regs.pc());
}
TYPED_TEST_P(DwarfSectionImplTest, GetCie_fail_should_not_cache) {
ASSERT_TRUE(this->section_->GetCie(0x4000) == nullptr);
EXPECT_EQ(DWARF_ERROR_MEMORY_INVALID, this->section_->last_error());
this->section_->TestClearError();
ASSERT_TRUE(this->section_->GetCie(0x4000) == nullptr);
EXPECT_EQ(DWARF_ERROR_MEMORY_INVALID, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, GetCie_32_version_check) {
this->memory_.SetData32(0x5000, 0x100);
this->memory_.SetData32(0x5004, 0xffffffff);
this->memory_.SetData8(0x5008, 0x1);
this->memory_.SetData8(0x5009, '\0');
this->memory_.SetData8(0x500a, 4);
this->memory_.SetData8(0x500b, 8);
this->memory_.SetData8(0x500c, 0x20);
EXPECT_CALL(*this->section_, IsCie32(0xffffffff)).WillRepeatedly(::testing::Return(true));
const DwarfCie* cie = this->section_->GetCie(0x5000);
ASSERT_TRUE(cie != nullptr);
EXPECT_EQ(1U, cie->version);
EXPECT_EQ(DW_EH_PE_sdata4, cie->fde_address_encoding);
EXPECT_EQ(DW_EH_PE_omit, cie->lsda_encoding);
EXPECT_EQ(0U, cie->segment_size);
EXPECT_EQ(1U, cie->augmentation_string.size());
EXPECT_EQ('\0', cie->augmentation_string[0]);
EXPECT_EQ(0U, cie->personality_handler);
EXPECT_EQ(0x500dU, cie->cfa_instructions_offset);
EXPECT_EQ(0x5104U, cie->cfa_instructions_end);
EXPECT_EQ(4U, cie->code_alignment_factor);
EXPECT_EQ(8, cie->data_alignment_factor);
EXPECT_EQ(0x20U, cie->return_address_register);
EXPECT_EQ(DWARF_ERROR_NONE, this->section_->last_error());
this->section_->TestClearCachedCieEntry();
// Set version to 0, 2, 5 and verify we fail.
this->memory_.SetData8(0x5008, 0x0);
this->section_->TestClearError();
ASSERT_TRUE(this->section_->GetCie(0x5000) == nullptr);
EXPECT_EQ(DWARF_ERROR_UNSUPPORTED_VERSION, this->section_->last_error());
this->memory_.SetData8(0x5008, 0x2);
this->section_->TestClearError();
ASSERT_TRUE(this->section_->GetCie(0x5000) == nullptr);
EXPECT_EQ(DWARF_ERROR_UNSUPPORTED_VERSION, this->section_->last_error());
this->memory_.SetData8(0x5008, 0x5);
this->section_->TestClearError();
ASSERT_TRUE(this->section_->GetCie(0x5000) == nullptr);
EXPECT_EQ(DWARF_ERROR_UNSUPPORTED_VERSION, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, GetCie_negative_data_alignment_factor) {
this->memory_.SetData32(0x5000, 0x100);
this->memory_.SetData32(0x5004, 0xffffffff);
this->memory_.SetData8(0x5008, 0x1);
this->memory_.SetData8(0x5009, '\0');
this->memory_.SetData8(0x500a, 4);
this->memory_.SetMemory(0x500b, std::vector<uint8_t>{0xfc, 0xff, 0xff, 0xff, 0x7f});
this->memory_.SetData8(0x5010, 0x20);
EXPECT_CALL(*this->section_, IsCie32(0xffffffff)).WillRepeatedly(::testing::Return(true));
const DwarfCie* cie = this->section_->GetCie(0x5000);
ASSERT_TRUE(cie != nullptr);
EXPECT_EQ(1U, cie->version);
EXPECT_EQ(DW_EH_PE_sdata4, cie->fde_address_encoding);
EXPECT_EQ(DW_EH_PE_omit, cie->lsda_encoding);
EXPECT_EQ(0U, cie->segment_size);
EXPECT_EQ(1U, cie->augmentation_string.size());
EXPECT_EQ('\0', cie->augmentation_string[0]);
EXPECT_EQ(0U, cie->personality_handler);
EXPECT_EQ(0x5011U, cie->cfa_instructions_offset);
EXPECT_EQ(0x5104U, cie->cfa_instructions_end);
EXPECT_EQ(4U, cie->code_alignment_factor);
EXPECT_EQ(-4, cie->data_alignment_factor);
EXPECT_EQ(0x20U, cie->return_address_register);
}
TYPED_TEST_P(DwarfSectionImplTest, GetCie_64_no_augment) {
this->memory_.SetData32(0x8000, 0xffffffff);
this->memory_.SetData64(0x8004, 0x200);
this->memory_.SetData64(0x800c, 0xffffffff);
this->memory_.SetData8(0x8014, 0x1);
this->memory_.SetData8(0x8015, '\0');
this->memory_.SetData8(0x8016, 4);
this->memory_.SetData8(0x8017, 8);
this->memory_.SetData8(0x8018, 0x20);
EXPECT_CALL(*this->section_, IsCie64(0xffffffff)).WillRepeatedly(::testing::Return(true));
const DwarfCie* cie = this->section_->GetCie(0x8000);
ASSERT_TRUE(cie != nullptr);
EXPECT_EQ(1U, cie->version);
EXPECT_EQ(DW_EH_PE_sdata8, cie->fde_address_encoding);
EXPECT_EQ(DW_EH_PE_omit, cie->lsda_encoding);
EXPECT_EQ(0U, cie->segment_size);
EXPECT_EQ(1U, cie->augmentation_string.size());
EXPECT_EQ('\0', cie->augmentation_string[0]);
EXPECT_EQ(0U, cie->personality_handler);
EXPECT_EQ(0x8019U, cie->cfa_instructions_offset);
EXPECT_EQ(0x820cU, cie->cfa_instructions_end);
EXPECT_EQ(4U, cie->code_alignment_factor);
EXPECT_EQ(8, cie->data_alignment_factor);
EXPECT_EQ(0x20U, cie->return_address_register);
}
TYPED_TEST_P(DwarfSectionImplTest, GetCie_augment) {
this->memory_.SetData32(0x5000, 0x100);
this->memory_.SetData32(0x5004, 0xffffffff);
this->memory_.SetData8(0x5008, 0x1);
this->memory_.SetMemory(0x5009, std::vector<uint8_t>{'z', 'L', 'P', 'R', '\0'});
this->memory_.SetData8(0x500e, 4);
this->memory_.SetData8(0x500f, 8);
this->memory_.SetData8(0x5010, 0x10);
// Augment length.
this->memory_.SetData8(0x5011, 0xf);
// L data.
this->memory_.SetData8(0x5012, DW_EH_PE_textrel | DW_EH_PE_udata2);
// P data.
this->memory_.SetData8(0x5013, DW_EH_PE_udata4);
this->memory_.SetData32(0x5014, 0x12345678);
// R data.
this->memory_.SetData8(0x5018, DW_EH_PE_udata2);
EXPECT_CALL(*this->section_, IsCie32(0xffffffff)).WillRepeatedly(::testing::Return(true));
const DwarfCie* cie = this->section_->GetCie(0x5000);
ASSERT_TRUE(cie != nullptr);
EXPECT_EQ(1U, cie->version);
EXPECT_EQ(DW_EH_PE_udata2, cie->fde_address_encoding);
EXPECT_EQ(DW_EH_PE_textrel | DW_EH_PE_udata2, cie->lsda_encoding);
EXPECT_EQ(0U, cie->segment_size);
EXPECT_EQ(5U, cie->augmentation_string.size());
EXPECT_EQ('z', cie->augmentation_string[0]);
EXPECT_EQ('L', cie->augmentation_string[1]);
EXPECT_EQ('P', cie->augmentation_string[2]);
EXPECT_EQ('R', cie->augmentation_string[3]);
EXPECT_EQ('\0', cie->augmentation_string[4]);
EXPECT_EQ(0x12345678U, cie->personality_handler);
EXPECT_EQ(0x5021U, cie->cfa_instructions_offset);
EXPECT_EQ(0x5104U, cie->cfa_instructions_end);
EXPECT_EQ(4U, cie->code_alignment_factor);
EXPECT_EQ(8, cie->data_alignment_factor);
EXPECT_EQ(0x10U, cie->return_address_register);
}
TYPED_TEST_P(DwarfSectionImplTest, GetCie_version_3) {
this->memory_.SetData32(0x5000, 0x100);
this->memory_.SetData32(0x5004, 0xffffffff);
this->memory_.SetData8(0x5008, 0x3);
this->memory_.SetData8(0x5009, '\0');
this->memory_.SetData8(0x500a, 4);
this->memory_.SetData8(0x500b, 8);
this->memory_.SetMemory(0x500c, std::vector<uint8_t>{0x81, 0x03});
EXPECT_CALL(*this->section_, IsCie32(0xffffffff)).WillRepeatedly(::testing::Return(true));
const DwarfCie* cie = this->section_->GetCie(0x5000);
ASSERT_TRUE(cie != nullptr);
EXPECT_EQ(3U, cie->version);
EXPECT_EQ(DW_EH_PE_sdata4, cie->fde_address_encoding);
EXPECT_EQ(DW_EH_PE_omit, cie->lsda_encoding);
EXPECT_EQ(0U, cie->segment_size);
EXPECT_EQ(1U, cie->augmentation_string.size());
EXPECT_EQ('\0', cie->augmentation_string[0]);
EXPECT_EQ(0U, cie->personality_handler);
EXPECT_EQ(0x500eU, cie->cfa_instructions_offset);
EXPECT_EQ(0x5104U, cie->cfa_instructions_end);
EXPECT_EQ(4U, cie->code_alignment_factor);
EXPECT_EQ(8, cie->data_alignment_factor);
EXPECT_EQ(0x181U, cie->return_address_register);
}
TYPED_TEST_P(DwarfSectionImplTest, GetCie_version_4) {
this->memory_.SetData32(0x5000, 0x100);
this->memory_.SetData32(0x5004, 0xffffffff);
this->memory_.SetData8(0x5008, 0x4);
this->memory_.SetData8(0x5009, '\0');
this->memory_.SetData8(0x500a, 4);
this->memory_.SetData8(0x500b, 0x13);
this->memory_.SetData8(0x500c, 4);
this->memory_.SetData8(0x500d, 8);
this->memory_.SetMemory(0x500e, std::vector<uint8_t>{0x81, 0x03});
EXPECT_CALL(*this->section_, IsCie32(0xffffffff)).WillRepeatedly(::testing::Return(true));
const DwarfCie* cie = this->section_->GetCie(0x5000);
ASSERT_TRUE(cie != nullptr);
EXPECT_EQ(4U, cie->version);
EXPECT_EQ(DW_EH_PE_sdata4, cie->fde_address_encoding);
EXPECT_EQ(DW_EH_PE_omit, cie->lsda_encoding);
EXPECT_EQ(0x13U, cie->segment_size);
EXPECT_EQ(1U, cie->augmentation_string.size());
EXPECT_EQ('\0', cie->augmentation_string[0]);
EXPECT_EQ(0U, cie->personality_handler);
EXPECT_EQ(0x5010U, cie->cfa_instructions_offset);
EXPECT_EQ(0x5104U, cie->cfa_instructions_end);
EXPECT_EQ(4U, cie->code_alignment_factor);
EXPECT_EQ(8, cie->data_alignment_factor);
EXPECT_EQ(0x181U, cie->return_address_register);
}
TYPED_TEST_P(DwarfSectionImplTest, GetFdeFromOffset_fail_should_not_cache) {
ASSERT_TRUE(this->section_->GetFdeFromOffset(0x4000) == nullptr);
EXPECT_EQ(DWARF_ERROR_MEMORY_INVALID, this->section_->last_error());
this->section_->TestClearError();
ASSERT_TRUE(this->section_->GetFdeFromOffset(0x4000) == nullptr);
EXPECT_EQ(DWARF_ERROR_MEMORY_INVALID, this->section_->last_error());
}
TYPED_TEST_P(DwarfSectionImplTest, GetFdeFromOffset_32_no_augment) {
this->memory_.SetData32(0x4000, 0x20);
this->memory_.SetData32(0x4004, 0x8000);
this->memory_.SetData32(0x4008, 0x5000);
this->memory_.SetData32(0x400c, 0x100);
EXPECT_CALL(*this->section_, IsCie32(0x8000)).WillOnce(::testing::Return(false));
EXPECT_CALL(*this->section_, GetCieOffsetFromFde32(0x8000)).WillOnce(::testing::Return(0x8000));
DwarfCie cie{};
cie.fde_address_encoding = DW_EH_PE_udata4;
this->section_->TestSetCachedCieEntry(0x8000, cie);
EXPECT_CALL(*this->section_, AdjustPcFromFde(0x5000)).WillOnce(::testing::Return(0x5000));
const DwarfFde* fde = this->section_->GetFdeFromOffset(0x4000);
ASSERT_TRUE(fde != nullptr);
ASSERT_TRUE(fde->cie != nullptr);
EXPECT_EQ(0x4010U, fde->cfa_instructions_offset);
EXPECT_EQ(0x4024U, fde->cfa_instructions_end);
EXPECT_EQ(0x5000U, fde->pc_start);
EXPECT_EQ(0x5100U, fde->pc_end);
EXPECT_EQ(0x8000U, fde->cie_offset);
EXPECT_EQ(0U, fde->lsda_address);
}
TYPED_TEST_P(DwarfSectionImplTest, GetFdeFromOffset_32_no_augment_non_zero_segment_size) {
this->memory_.SetData32(0x4000, 0x30);
this->memory_.SetData32(0x4004, 0x8000);
this->memory_.SetData32(0x4018, 0x5000);
this->memory_.SetData32(0x401c, 0x100);
EXPECT_CALL(*this->section_, IsCie32(0x8000)).WillOnce(::testing::Return(false));
EXPECT_CALL(*this->section_, GetCieOffsetFromFde32(0x8000)).WillOnce(::testing::Return(0x8000));
DwarfCie cie{};
cie.fde_address_encoding = DW_EH_PE_udata4;
cie.segment_size = 0x10;
this->section_->TestSetCachedCieEntry(0x8000, cie);
EXPECT_CALL(*this->section_, AdjustPcFromFde(0x5000)).WillOnce(::testing::Return(0x5000));
const DwarfFde* fde = this->section_->GetFdeFromOffset(0x4000);
ASSERT_TRUE(fde != nullptr);
ASSERT_TRUE(fde->cie != nullptr);
EXPECT_EQ(0x4020U, fde->cfa_instructions_offset);
EXPECT_EQ(0x4034U, fde->cfa_instructions_end);
EXPECT_EQ(0x5000U, fde->pc_start);
EXPECT_EQ(0x5100U, fde->pc_end);
EXPECT_EQ(0x8000U, fde->cie_offset);
EXPECT_EQ(0U, fde->lsda_address);
}
TYPED_TEST_P(DwarfSectionImplTest, GetFdeFromOffset_32_augment) {
this->memory_.SetData32(0x4000, 0x100);
this->memory_.SetData32(0x4004, 0x8000);
this->memory_.SetData32(0x4008, 0x5000);
this->memory_.SetData32(0x400c, 0x100);
this->memory_.SetMemory(0x4010, std::vector<uint8_t>{0x82, 0x01});
this->memory_.SetData16(0x4012, 0x1234);
EXPECT_CALL(*this->section_, IsCie32(0x8000)).WillOnce(::testing::Return(false));
EXPECT_CALL(*this->section_, GetCieOffsetFromFde32(0x8000)).WillOnce(::testing::Return(0x8000));
DwarfCie cie{};
cie.fde_address_encoding = DW_EH_PE_udata4;
cie.augmentation_string.push_back('z');
cie.lsda_encoding = DW_EH_PE_udata2;
this->section_->TestSetCachedCieEntry(0x8000, cie);
EXPECT_CALL(*this->section_, AdjustPcFromFde(0x5000)).WillOnce(::testing::Return(0x5000));
const DwarfFde* fde = this->section_->GetFdeFromOffset(0x4000);
ASSERT_TRUE(fde != nullptr);
ASSERT_TRUE(fde->cie != nullptr);
EXPECT_EQ(0x4094U, fde->cfa_instructions_offset);
EXPECT_EQ(0x4104U, fde->cfa_instructions_end);
EXPECT_EQ(0x5000U, fde->pc_start);
EXPECT_EQ(0x5100U, fde->pc_end);
EXPECT_EQ(0x8000U, fde->cie_offset);
EXPECT_EQ(0x1234U, fde->lsda_address);
}
TYPED_TEST_P(DwarfSectionImplTest, GetFdeFromOffset_64_no_augment) {
this->memory_.SetData32(0x4000, 0xffffffff);
this->memory_.SetData64(0x4004, 0x100);
this->memory_.SetData64(0x400c, 0x12345678);
this->memory_.SetData32(0x4014, 0x5000);
this->memory_.SetData32(0x4018, 0x100);
EXPECT_CALL(*this->section_, IsCie64(0x12345678)).WillOnce(::testing::Return(false));
EXPECT_CALL(*this->section_, GetCieOffsetFromFde64(0x12345678))
.WillOnce(::testing::Return(0x12345678));
DwarfCie cie{};
cie.fde_address_encoding = DW_EH_PE_udata4;
this->section_->TestSetCachedCieEntry(0x12345678, cie);
EXPECT_CALL(*this->section_, AdjustPcFromFde(0x5000)).WillOnce(::testing::Return(0x5000));
const DwarfFde* fde = this->section_->GetFdeFromOffset(0x4000);
ASSERT_TRUE(fde != nullptr);
ASSERT_TRUE(fde->cie != nullptr);
EXPECT_EQ(0x401cU, fde->cfa_instructions_offset);
EXPECT_EQ(0x410cU, fde->cfa_instructions_end);
EXPECT_EQ(0x5000U, fde->pc_start);
EXPECT_EQ(0x5100U, fde->pc_end);
EXPECT_EQ(0x12345678U, fde->cie_offset);
EXPECT_EQ(0U, fde->lsda_address);
}
TYPED_TEST_P(DwarfSectionImplTest, GetFdeFromOffset_cached) {
DwarfCie cie{};
cie.fde_address_encoding = DW_EH_PE_udata4;
cie.augmentation_string.push_back('z');
cie.lsda_encoding = DW_EH_PE_udata2;
DwarfFde fde_cached{};
fde_cached.cfa_instructions_offset = 0x1000;
fde_cached.cfa_instructions_end = 0x1100;
fde_cached.pc_start = 0x9000;
fde_cached.pc_end = 0x9400;
fde_cached.cie_offset = 0x30000;
fde_cached.cie = &cie;
this->section_->TestSetCachedFdeEntry(0x6000, fde_cached);
const DwarfFde* fde = this->section_->GetFdeFromOffset(0x6000);
ASSERT_TRUE(fde != nullptr);
ASSERT_EQ(&cie, fde->cie);
EXPECT_EQ(0x1000U, fde->cfa_instructions_offset);
EXPECT_EQ(0x1100U, fde->cfa_instructions_end);
EXPECT_EQ(0x9000U, fde->pc_start);
EXPECT_EQ(0x9400U, fde->pc_end);
EXPECT_EQ(0x30000U, fde->cie_offset);
}
TYPED_TEST_P(DwarfSectionImplTest, GetCfaLocationInfo_cie_not_cached) {
DwarfCie cie{};
cie.cfa_instructions_offset = 0x3000;
cie.cfa_instructions_end = 0x3002;
DwarfFde fde{};
fde.cie = &cie;
fde.cie_offset = 0x8000;
fde.cfa_instructions_offset = 0x6000;
fde.cfa_instructions_end = 0x6002;
this->memory_.SetMemory(0x3000, std::vector<uint8_t>{0x09, 0x02, 0x01});
this->memory_.SetMemory(0x6000, std::vector<uint8_t>{0x09, 0x04, 0x03});
dwarf_loc_regs_t loc_regs;
ASSERT_TRUE(this->section_->GetCfaLocationInfo(0x100, &fde, &loc_regs));
ASSERT_EQ(2U, loc_regs.size());
auto entry = loc_regs.find(2);
ASSERT_NE(entry, loc_regs.end());
ASSERT_EQ(DWARF_LOCATION_REGISTER, entry->second.type);
ASSERT_EQ(1U, entry->second.values[0]);
entry = loc_regs.find(4);
ASSERT_NE(entry, loc_regs.end());
ASSERT_EQ(DWARF_LOCATION_REGISTER, entry->second.type);
ASSERT_EQ(3U, entry->second.values[0]);
}
TYPED_TEST_P(DwarfSectionImplTest, GetCfaLocationInfo_cie_cached) {
DwarfCie cie{};
cie.cfa_instructions_offset = 0x3000;
cie.cfa_instructions_end = 0x3002;
DwarfFde fde{};
fde.cie = &cie;
fde.cie_offset = 0x8000;
fde.cfa_instructions_offset = 0x6000;
fde.cfa_instructions_end = 0x6002;
dwarf_loc_regs_t cie_loc_regs{{6, {DWARF_LOCATION_REGISTER, {4, 0}}}};
this->section_->TestSetCachedCieLocRegs(0x8000, cie_loc_regs);
this->memory_.SetMemory(0x6000, std::vector<uint8_t>{0x09, 0x04, 0x03});
dwarf_loc_regs_t loc_regs;
ASSERT_TRUE(this->section_->GetCfaLocationInfo(0x100, &fde, &loc_regs));
ASSERT_EQ(2U, loc_regs.size());
auto entry = loc_regs.find(6);
ASSERT_NE(entry, loc_regs.end());
ASSERT_EQ(DWARF_LOCATION_REGISTER, entry->second.type);
ASSERT_EQ(4U, entry->second.values[0]);
entry = loc_regs.find(4);
ASSERT_NE(entry, loc_regs.end());
ASSERT_EQ(DWARF_LOCATION_REGISTER, entry->second.type);
ASSERT_EQ(3U, entry->second.values[0]);
}
TYPED_TEST_P(DwarfSectionImplTest, Log) {
DwarfCie cie{};
cie.cfa_instructions_offset = 0x5000;
cie.cfa_instructions_end = 0x5001;
DwarfFde fde{};
fde.cie = &cie;
fde.cfa_instructions_offset = 0x6000;
fde.cfa_instructions_end = 0x6001;
this->memory_.SetMemory(0x5000, std::vector<uint8_t>{0x00});
this->memory_.SetMemory(0x6000, std::vector<uint8_t>{0xc2});
ASSERT_TRUE(this->section_->Log(2, 0x1000, 0x1000, &fde));
ASSERT_EQ(
"4 unwind DW_CFA_nop\n"
"4 unwind Raw Data: 0x00\n"
"4 unwind DW_CFA_restore register(2)\n"
"4 unwind Raw Data: 0xc2\n",
GetFakeLogPrint());
ASSERT_EQ("", GetFakeLogBuf());
}
REGISTER_TYPED_TEST_CASE_P(
DwarfSectionImplTest, Eval_cfa_expr_eval_fail, Eval_cfa_expr_no_stack,
Eval_cfa_expr_is_register, Eval_cfa_expr, Eval_cfa_val_expr, Eval_bad_regs, Eval_no_cfa,
Eval_cfa_bad, Eval_cfa_register_prev, Eval_cfa_register_from_value, Eval_double_indirection,
Eval_invalid_register, Eval_different_reg_locations, Eval_return_address_undefined,
Eval_return_address, Eval_ignore_large_reg_loc, Eval_reg_expr, Eval_reg_val_expr,
Eval_same_cfa_same_pc, GetCie_fail_should_not_cache, GetCie_32_version_check,
GetCie_negative_data_alignment_factor, GetCie_64_no_augment, GetCie_augment, GetCie_version_3,
GetCie_version_4, GetFdeFromOffset_fail_should_not_cache, GetFdeFromOffset_32_no_augment,
GetFdeFromOffset_32_no_augment_non_zero_segment_size, GetFdeFromOffset_32_augment,
GetFdeFromOffset_64_no_augment, GetFdeFromOffset_cached, GetCfaLocationInfo_cie_not_cached,
GetCfaLocationInfo_cie_cached, Log);
typedef ::testing::Types<uint32_t, uint64_t> DwarfSectionImplTestTypes;
INSTANTIATE_TYPED_TEST_CASE_P(, DwarfSectionImplTest, DwarfSectionImplTestTypes);
} // namespace unwindstack
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