Merge "Elf interface for new unwinder."

1 files changed, 222 insertions, 23 deletions

diff --git a/libunwindstack/tests/RegsTest.cpp b/libunwindstack/tests/RegsTest.cpp
index f9e8b0ed8..0dac2788c 100644
--- a/libunwindstack/tests/RegsTest.cpp
+++ b/libunwindstack/tests/RegsTest.cpp
@@ -18,50 +18,249 @@
 
 #include <gtest/gtest.h>
 
+#include "Elf.h"
+#include "ElfInterface.h"
+#include "MapInfo.h"
 #include "Regs.h"
 
-class RegsTest : public ::testing::Test {};
+#include "MemoryFake.h"
 
-TEST_F(RegsTest, regs32) {
-  Regs32 regs32(10, 20, 30);
+class ElfFake : public Elf {
+ public:
+  ElfFake(Memory* memory) : Elf(memory) { valid_ = true; }
+  virtual ~ElfFake() = default;
 
-  ASSERT_EQ(10U, regs32.pc_reg());
-  ASSERT_EQ(20U, regs32.sp_reg());
-  ASSERT_EQ(30U, regs32.total_regs());
+  void set_elf_interface(ElfInterface* interface) { interface_.reset(interface); }
+};
 
-  uint32_t* raw = reinterpret_cast<uint32_t*>(regs32.raw_data());
-  for (size_t i = 0; i < 30; i++) {
+class ElfInterfaceFake : public ElfInterface {
+ public:
+  ElfInterfaceFake(Memory* memory) : ElfInterface(memory) {}
+  virtual ~ElfInterfaceFake() = default;
+
+  void set_load_bias(uint64_t load_bias) { load_bias_ = load_bias; }
+
+  bool Init() override { return false; }
+  void InitHeaders() override {}
+  bool GetSoname(std::string*) override { return false; }
+  bool GetFunctionName(uint64_t, std::string*, uint64_t*) override { return false; }
+  bool Step(uint64_t, Regs*, Memory*) override { return false; }
+};
+
+template <typename TypeParam>
+class RegsTestTmpl : public RegsTmpl<TypeParam> {
+ public:
+  RegsTestTmpl(uint16_t total_regs, uint16_t regs_sp)
+      : RegsTmpl<TypeParam>(total_regs, regs_sp, Regs::Location(Regs::LOCATION_UNKNOWN, 0)) {}
+  RegsTestTmpl(uint16_t total_regs, uint16_t regs_sp, Regs::Location return_loc)
+      : RegsTmpl<TypeParam>(total_regs, regs_sp, return_loc) {}
+  virtual ~RegsTestTmpl() = default;
+
+  uint64_t GetAdjustedPc(uint64_t, Elf*) { return 0; }
+};
+
+class RegsTest : public ::testing::Test {
+ protected:
+  void SetUp() override {
+    memory_ = new MemoryFake;
+    elf_.reset(new ElfFake(memory_));
+    elf_interface_ = new ElfInterfaceFake(elf_->memory());
+    elf_->set_elf_interface(elf_interface_);
+  }
+
+  template <typename AddressType>
+  void regs_rel_pc();
+
+  template <typename AddressType>
+  void regs_return_address_register();
+
+  ElfInterfaceFake* elf_interface_;
+  MemoryFake* memory_;
+  std::unique_ptr<ElfFake> elf_;
+};
+
+TEST_F(RegsTest, regs32) {
+  RegsTestTmpl<uint32_t> regs32(50, 10);
+  ASSERT_EQ(50U, regs32.total_regs());
+  ASSERT_EQ(10U, regs32.sp_reg());
+
+  uint32_t* raw = reinterpret_cast<uint32_t*>(regs32.RawData());
+  for (size_t i = 0; i < 50; i++) {
     raw[i] = 0xf0000000 + i;
   }
+  regs32.set_pc(0xf0120340);
+  regs32.set_sp(0xa0ab0cd0);
 
-  ASSERT_EQ(0xf000000aU, regs32.pc());
-  ASSERT_EQ(0xf0000014U, regs32.sp());
+  for (size_t i = 0; i < 50; i++) {
+    ASSERT_EQ(0xf0000000U + i, regs32[i]) << "Failed comparing register " << i;
+  }
 
-  ASSERT_EQ(0xf0000001U, regs32[1]);
-  regs32[1] = 10;
-  ASSERT_EQ(10U, regs32[1]);
+  ASSERT_EQ(0xf0120340U, regs32.pc());
+  ASSERT_EQ(0xa0ab0cd0U, regs32.sp());
 
-  ASSERT_EQ(0xf000001dU, regs32[29]);
+  regs32[32] = 10;
+  ASSERT_EQ(10U, regs32[32]);
 }
 
 TEST_F(RegsTest, regs64) {
-  Regs64 regs64(10, 20, 30);
-
-  ASSERT_EQ(10U, regs64.pc_reg());
-  ASSERT_EQ(20U, regs64.sp_reg());
+  RegsTestTmpl<uint64_t> regs64(30, 12);
   ASSERT_EQ(30U, regs64.total_regs());
+  ASSERT_EQ(12U, regs64.sp_reg());
 
-  uint64_t* raw = reinterpret_cast<uint64_t*>(regs64.raw_data());
+  uint64_t* raw = reinterpret_cast<uint64_t*>(regs64.RawData());
   for (size_t i = 0; i < 30; i++) {
     raw[i] = 0xf123456780000000UL + i;
   }
+  regs64.set_pc(0xf123456780102030UL);
+  regs64.set_sp(0xa123456780a0b0c0UL);
 
-  ASSERT_EQ(0xf12345678000000aUL, regs64.pc());
-  ASSERT_EQ(0xf123456780000014UL, regs64.sp());
+  for (size_t i = 0; i < 30; i++) {
+    ASSERT_EQ(0xf123456780000000U + i, regs64[i]) << "Failed reading register " << i;
+  }
+
+  ASSERT_EQ(0xf123456780102030UL, regs64.pc());
+  ASSERT_EQ(0xa123456780a0b0c0UL, regs64.sp());
 
-  ASSERT_EQ(0xf123456780000008U, regs64[8]);
   regs64[8] = 10;
   ASSERT_EQ(10U, regs64[8]);
+}
+
+template <typename AddressType>
+void RegsTest::regs_rel_pc() {
+  RegsTestTmpl<AddressType> regs(30, 12);
+
+  elf_interface_->set_load_bias(0);
+  MapInfo map_info{.start = 0x1000, .end = 0x2000};
+  regs.set_pc(0x1101);
+  ASSERT_EQ(0x101U, regs.GetRelPc(elf_.get(), &map_info));
+  elf_interface_->set_load_bias(0x3000);
+  ASSERT_EQ(0x3101U, regs.GetRelPc(elf_.get(), &map_info));
+}
+
+TEST_F(RegsTest, regs32_rel_pc) {
+  regs_rel_pc<uint32_t>();
+}
+
+TEST_F(RegsTest, regs64_rel_pc) {
+  regs_rel_pc<uint64_t>();
+}
+
+template <typename AddressType>
+void RegsTest::regs_return_address_register() {
+  RegsTestTmpl<AddressType> regs(20, 10, Regs::Location(Regs::LOCATION_REGISTER, 5));
+
+  regs[5] = 0x12345;
+  uint64_t value;
+  ASSERT_TRUE(regs.GetReturnAddressFromDefault(memory_, &value));
+  ASSERT_EQ(0x12345U, value);
+}
+
+TEST_F(RegsTest, regs32_return_address_register) {
+  regs_return_address_register<uint32_t>();
+}
+
+TEST_F(RegsTest, regs64_return_address_register) {
+  regs_return_address_register<uint64_t>();
+}
+
+TEST_F(RegsTest, regs32_return_address_sp_offset) {
+  RegsTestTmpl<uint32_t> regs(20, 10, Regs::Location(Regs::LOCATION_SP_OFFSET, -2));
+
+  regs.set_sp(0x2002);
+  memory_->SetData32(0x2000, 0x12345678);
+  uint64_t value;
+  ASSERT_TRUE(regs.GetReturnAddressFromDefault(memory_, &value));
+  ASSERT_EQ(0x12345678U, value);
+}
+
+TEST_F(RegsTest, regs64_return_address_sp_offset) {
+  RegsTestTmpl<uint64_t> regs(20, 10, Regs::Location(Regs::LOCATION_SP_OFFSET, -8));
+
+  regs.set_sp(0x2008);
+  memory_->SetData64(0x2000, 0x12345678aabbccddULL);
+  uint64_t value;
+  ASSERT_TRUE(regs.GetReturnAddressFromDefault(memory_, &value));
+  ASSERT_EQ(0x12345678aabbccddULL, value);
+}
+
+TEST_F(RegsTest, rel_pc) {
+  RegsArm64 arm64;
+  ASSERT_EQ(0xcU, arm64.GetAdjustedPc(0x10, elf_.get()));
+  ASSERT_EQ(0x0U, arm64.GetAdjustedPc(0x4, elf_.get()));
+  ASSERT_EQ(0x3U, arm64.GetAdjustedPc(0x3, elf_.get()));
+  ASSERT_EQ(0x2U, arm64.GetAdjustedPc(0x2, elf_.get()));
+  ASSERT_EQ(0x1U, arm64.GetAdjustedPc(0x1, elf_.get()));
+  ASSERT_EQ(0x0U, arm64.GetAdjustedPc(0x0, elf_.get()));
+
+  RegsX86 x86;
+  ASSERT_EQ(0xffU,  x86.GetAdjustedPc(0x100, elf_.get()));
+  ASSERT_EQ(0x1U,  x86.GetAdjustedPc(0x2, elf_.get()));
+  ASSERT_EQ(0x0U,  x86.GetAdjustedPc(0x1, elf_.get()));
+  ASSERT_EQ(0x0U,  x86.GetAdjustedPc(0x0, elf_.get()));
+
+  RegsX86_64 x86_64;
+  ASSERT_EQ(0xffU,  x86_64.GetAdjustedPc(0x100, elf_.get()));
+  ASSERT_EQ(0x1U,  x86_64.GetAdjustedPc(0x2, elf_.get()));
+  ASSERT_EQ(0x0U,  x86_64.GetAdjustedPc(0x1, elf_.get()));
+  ASSERT_EQ(0x0U,  x86_64.GetAdjustedPc(0x0, elf_.get()));
+}
+
+TEST_F(RegsTest, rel_pc_arm) {
+  RegsArm arm;
+
+  // Check fence posts.
+  elf_interface_->set_load_bias(0);
+  ASSERT_EQ(3U,  arm.GetAdjustedPc(0x5, elf_.get()));
+  ASSERT_EQ(4U,  arm.GetAdjustedPc(0x4, elf_.get()));
+  ASSERT_EQ(3U,  arm.GetAdjustedPc(0x3, elf_.get()));
+  ASSERT_EQ(2U,  arm.GetAdjustedPc(0x2, elf_.get()));
+  ASSERT_EQ(1U,  arm.GetAdjustedPc(0x1, elf_.get()));
+  ASSERT_EQ(0U,  arm.GetAdjustedPc(0x0, elf_.get()));
+
+  elf_interface_->set_load_bias(0x100);
+  ASSERT_EQ(0xffU,  arm.GetAdjustedPc(0xff, elf_.get()));
+  ASSERT_EQ(0x103U,  arm.GetAdjustedPc(0x105, elf_.get()));
+  ASSERT_EQ(0x104U,  arm.GetAdjustedPc(0x104, elf_.get()));
+  ASSERT_EQ(0x103U,  arm.GetAdjustedPc(0x103, elf_.get()));
+  ASSERT_EQ(0x102U,  arm.GetAdjustedPc(0x102, elf_.get()));
+  ASSERT_EQ(0x101U,  arm.GetAdjustedPc(0x101, elf_.get()));
+  ASSERT_EQ(0x100U,  arm.GetAdjustedPc(0x100, elf_.get()));
+
+  // Check thumb instructions handling.
+  elf_interface_->set_load_bias(0);
+  memory_->SetData32(0x2000, 0);
+  ASSERT_EQ(0x2003U,  arm.GetAdjustedPc(0x2005, elf_.get()));
+  memory_->SetData32(0x2000, 0xe000f000);
+  ASSERT_EQ(0x2001U,  arm.GetAdjustedPc(0x2005, elf_.get()));
+
+  elf_interface_->set_load_bias(0x400);
+  memory_->SetData32(0x2100, 0);
+  ASSERT_EQ(0x2503U,  arm.GetAdjustedPc(0x2505, elf_.get()));
+  memory_->SetData32(0x2100, 0xf111f111);
+  ASSERT_EQ(0x2501U,  arm.GetAdjustedPc(0x2505, elf_.get()));
+}
+
+TEST_F(RegsTest, elf_invalid) {
+  Elf invalid_elf(new MemoryFake);
+  RegsArm regs_arm;
+  RegsArm64 regs_arm64;
+  RegsX86 regs_x86;
+  RegsX86_64 regs_x86_64;
+  MapInfo map_info{.start = 0x1000, .end = 0x2000};
+
+  regs_arm.set_pc(0x1500);
+  ASSERT_EQ(0x500U, regs_arm.GetRelPc(&invalid_elf, &map_info));
+  ASSERT_EQ(0x500U, regs_arm.GetAdjustedPc(0x500U, &invalid_elf));
+
+  regs_arm64.set_pc(0x1600);
+  ASSERT_EQ(0x600U, regs_arm64.GetRelPc(&invalid_elf, &map_info));
+  ASSERT_EQ(0x600U, regs_arm64.GetAdjustedPc(0x600U, &invalid_elf));
+
+  regs_x86.set_pc(0x1700);
+  ASSERT_EQ(0x700U, regs_x86.GetRelPc(&invalid_elf, &map_info));
+  ASSERT_EQ(0x700U, regs_x86.GetAdjustedPc(0x700U, &invalid_elf));
 
-  ASSERT_EQ(0xf12345678000001dU, regs64[29]);
+  regs_x86_64.set_pc(0x1800);
+  ASSERT_EQ(0x800U, regs_x86_64.GetRelPc(&invalid_elf, &map_info));
+  ASSERT_EQ(0x800U, regs_x86_64.GetAdjustedPc(0x800U, &invalid_elf));
 }