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Unified Diff: test/unittests/eh-frame-writer-unittest.cc

Issue 2147883003: Revert of Reland Implement .eh_frame writer and disassembler. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@eh-frame-base
Patch Set: Created 4 years, 5 months ago
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Index: test/unittests/eh-frame-writer-unittest.cc
diff --git a/test/unittests/eh-frame-writer-unittest.cc b/test/unittests/eh-frame-writer-unittest.cc
deleted file mode 100644
index 24eeca45aa35a29b5bf937050dc5e1d9a3ccaf34..0000000000000000000000000000000000000000
--- a/test/unittests/eh-frame-writer-unittest.cc
+++ /dev/null
@@ -1,464 +0,0 @@
-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "src/eh-frame.h"
-#include "test/unittests/test-utils.h"
-
-// Test enabled only on supported architectures.
-#if defined(V8_TARGET_ARCH_X64) || defined(V8_TARGET_ARCH_ARM) || \
- defined(V8_TARGET_ARCH_ARM64)
-
-using namespace v8::internal;
-
-namespace {
-
-class EhFrameWriterTest : public TestWithZone {
- protected:
- // Being a 7bit positive integer, this also serves as its ULEB128 encoding.
- static const int kTestRegisterCode = 0;
-
- static EhFrameIterator MakeIterator(EhFrameWriter* writer) {
- CodeDesc desc;
- writer->GetEhFrame(&desc);
- DCHECK_GT(desc.unwinding_info_size, 0);
- return EhFrameIterator(desc.unwinding_info,
- desc.unwinding_info + desc.unwinding_info_size);
- }
-};
-
-const int EhFrameWriterTest::kTestRegisterCode;
-
-} // namespace
-
-TEST_F(EhFrameWriterTest, Alignment) {
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.AdvanceLocation(42 * EhFrameConstants::kCodeAlignmentFactor);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- ASSERT_EQ(0, EhFrameConstants::kEhFrameHdrSize % 4);
- ASSERT_EQ(0, EhFrameConstants::kEhFrameTerminatorSize % 4);
- EXPECT_EQ(0, (iterator.GetBufferSize() - EhFrameConstants::kEhFrameHdrSize -
- EhFrameConstants::kEhFrameTerminatorSize) %
- 8);
-}
-
-TEST_F(EhFrameWriterTest, FDEHeader) {
- static const int kProcedureSize = 0x5678abcd;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.Finish(kProcedureSize);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- int cie_size = iterator.GetNextUInt32();
- iterator.Skip(cie_size);
-
- int fde_size = iterator.GetNextUInt32();
- EXPECT_EQ(iterator.GetBufferSize(),
- fde_size + cie_size + EhFrameConstants::kEhFrameTerminatorSize +
- EhFrameConstants::kEhFrameHdrSize + 2 * kInt32Size);
-
- int backwards_offset_to_cie_offset = iterator.GetCurrentOffset();
- int backwards_offset_to_cie = iterator.GetNextUInt32();
- EXPECT_EQ(backwards_offset_to_cie_offset, backwards_offset_to_cie);
-
- int procedure_address_offset = iterator.GetCurrentOffset();
- int procedure_address = iterator.GetNextUInt32();
- EXPECT_EQ(-(procedure_address_offset + RoundUp(kProcedureSize, 8)),
- procedure_address);
-
- int procedure_size = iterator.GetNextUInt32();
- EXPECT_EQ(kProcedureSize, procedure_size);
-}
-
-TEST_F(EhFrameWriterTest, SetOffset) {
- static const int kOffset = 0x0badc0de;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.SetBaseAddressOffset(kOffset);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kDefCfaOffset,
- iterator.GetNextOpcode());
- EXPECT_EQ(kOffset, iterator.GetNextULeb128());
-}
-
-TEST_F(EhFrameWriterTest, IncreaseOffset) {
- static const int kFirstOffset = 121;
- static const int kSecondOffset = 16;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.SetBaseAddressOffset(kFirstOffset);
- writer.IncreaseBaseAddressOffset(kSecondOffset);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kDefCfaOffset,
- iterator.GetNextOpcode());
- EXPECT_EQ(kFirstOffset, iterator.GetNextULeb128());
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kDefCfaOffset,
- iterator.GetNextOpcode());
- EXPECT_EQ(kFirstOffset + kSecondOffset, iterator.GetNextULeb128());
-}
-
-TEST_F(EhFrameWriterTest, SetRegister) {
- Register test_register = Register::from_code(kTestRegisterCode);
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.SetBaseAddressRegister(test_register);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kDefCfaRegister,
- iterator.GetNextOpcode());
- EXPECT_EQ(kTestRegisterCode, iterator.GetNextULeb128());
-}
-
-TEST_F(EhFrameWriterTest, SetRegisterAndOffset) {
- Register test_register = Register::from_code(kTestRegisterCode);
- static const int kOffset = 0x0badc0de;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.SetBaseAddressRegisterAndOffset(test_register, kOffset);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kDefCfa, iterator.GetNextOpcode());
- EXPECT_EQ(kTestRegisterCode, iterator.GetNextULeb128());
- EXPECT_EQ(kOffset, iterator.GetNextULeb128());
-}
-
-TEST_F(EhFrameWriterTest, PcOffsetEncoding6bit) {
- static const int kOffset = 42;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.AdvanceLocation(kOffset * EhFrameConstants::kCodeAlignmentFactor);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ((1 << 6) | kOffset, iterator.GetNextByte());
-}
-
-TEST_F(EhFrameWriterTest, PcOffsetEncoding6bitDelta) {
- static const int kFirstOffset = 42;
- static const int kSecondOffset = 62;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.AdvanceLocation(kFirstOffset * EhFrameConstants::kCodeAlignmentFactor);
- writer.AdvanceLocation(kSecondOffset *
- EhFrameConstants::kCodeAlignmentFactor);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ((1 << 6) | kFirstOffset, iterator.GetNextByte());
- EXPECT_EQ((1 << 6) | (kSecondOffset - kFirstOffset), iterator.GetNextByte());
-}
-
-TEST_F(EhFrameWriterTest, PcOffsetEncoding8bit) {
- static const int kOffset = 0x42;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.AdvanceLocation(kOffset * EhFrameConstants::kCodeAlignmentFactor);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kAdvanceLoc1,
- iterator.GetNextOpcode());
- EXPECT_EQ(kOffset, iterator.GetNextByte());
-}
-
-TEST_F(EhFrameWriterTest, PcOffsetEncoding8bitDelta) {
- static const int kFirstOffset = 0x10;
- static const int kSecondOffset = 0x70;
- static const int kThirdOffset = 0xb5;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.AdvanceLocation(kFirstOffset * EhFrameConstants::kCodeAlignmentFactor);
- writer.AdvanceLocation(kSecondOffset *
- EhFrameConstants::kCodeAlignmentFactor);
- writer.AdvanceLocation(kThirdOffset * EhFrameConstants::kCodeAlignmentFactor);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ((1 << 6) | kFirstOffset, iterator.GetNextByte());
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kAdvanceLoc1,
- iterator.GetNextOpcode());
- EXPECT_EQ(kSecondOffset - kFirstOffset, iterator.GetNextByte());
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kAdvanceLoc1,
- iterator.GetNextOpcode());
- EXPECT_EQ(kThirdOffset - kSecondOffset, iterator.GetNextByte());
-}
-
-TEST_F(EhFrameWriterTest, PcOffsetEncoding16bit) {
- static const int kOffset = kMaxUInt8 + 42;
- ASSERT_LT(kOffset, kMaxUInt16);
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.AdvanceLocation(kOffset * EhFrameConstants::kCodeAlignmentFactor);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kAdvanceLoc2,
- iterator.GetNextOpcode());
- EXPECT_EQ(kOffset, iterator.GetNextUInt16());
-}
-
-TEST_F(EhFrameWriterTest, PcOffsetEncoding16bitDelta) {
- static const int kFirstOffset = 0x41;
- static const int kSecondOffset = kMaxUInt8 + 0x42;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.AdvanceLocation(kFirstOffset * EhFrameConstants::kCodeAlignmentFactor);
- writer.AdvanceLocation(kSecondOffset *
- EhFrameConstants::kCodeAlignmentFactor);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kAdvanceLoc1,
- iterator.GetNextOpcode());
- EXPECT_EQ(kFirstOffset, iterator.GetNextByte());
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kAdvanceLoc2,
- iterator.GetNextOpcode());
- EXPECT_EQ(kSecondOffset - kFirstOffset, iterator.GetNextUInt16());
-}
-
-TEST_F(EhFrameWriterTest, PcOffsetEncoding32bit) {
- static const int kOffset = kMaxUInt16 + 42;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.AdvanceLocation(kOffset * EhFrameConstants::kCodeAlignmentFactor);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kAdvanceLoc4,
- iterator.GetNextOpcode());
- EXPECT_EQ(kOffset, iterator.GetNextUInt32());
-}
-
-TEST_F(EhFrameWriterTest, PcOffsetEncoding32bitDelta) {
- static const int kFirstOffset = kMaxUInt16 + 0x42;
- static const int kSecondOffset = kMaxUInt16 + 0x67;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.AdvanceLocation(kFirstOffset * EhFrameConstants::kCodeAlignmentFactor);
- writer.AdvanceLocation(kSecondOffset *
- EhFrameConstants::kCodeAlignmentFactor);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kAdvanceLoc4,
- iterator.GetNextOpcode());
- EXPECT_EQ(kFirstOffset, iterator.GetNextUInt32());
-
- EXPECT_EQ((1 << 6) | (kSecondOffset - kFirstOffset), iterator.GetNextByte());
-}
-
-TEST_F(EhFrameWriterTest, SaveRegisterUnsignedOffset) {
- Register test_register = Register::from_code(kTestRegisterCode);
- static const int kOffset =
- EhFrameConstants::kDataAlignmentFactor > 0 ? 12344 : -12344;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.RecordRegisterSavedToStack(test_register, kOffset);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ((2 << 6) | kTestRegisterCode, iterator.GetNextByte());
- EXPECT_EQ(kOffset / EhFrameConstants::kDataAlignmentFactor,
- iterator.GetNextULeb128());
-}
-
-TEST_F(EhFrameWriterTest, SaveRegisterSignedOffset) {
- Register test_register = Register::from_code(kTestRegisterCode);
- static const int kOffset =
- EhFrameConstants::kDataAlignmentFactor < 0 ? 12344 : -12344;
-
- ASSERT_EQ(kOffset % EhFrameConstants::kDataAlignmentFactor, 0);
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.RecordRegisterSavedToStack(test_register, kOffset);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kOffsetExtendedSf,
- iterator.GetNextOpcode());
- EXPECT_EQ(kTestRegisterCode, iterator.GetNextULeb128());
- EXPECT_EQ(kOffset / EhFrameConstants::kDataAlignmentFactor,
- iterator.GetNextSLeb128());
-}
-
-TEST_F(EhFrameWriterTest, RegisterNotModified) {
- Register test_register = Register::from_code(kTestRegisterCode);
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.RecordRegisterNotModified(test_register);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ(EhFrameConstants::DwarfOpcodes::kSameValue,
- iterator.GetNextOpcode());
- EXPECT_EQ(kTestRegisterCode, iterator.GetNextULeb128());
-}
-
-TEST_F(EhFrameWriterTest, RegisterFollowsInitialRule) {
- Register test_register = Register::from_code(kTestRegisterCode);
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.RecordRegisterFollowsInitialRule(test_register);
- writer.Finish(100);
-
- EhFrameIterator iterator = MakeIterator(&writer);
- iterator.SkipToFdeDirectives();
-
- EXPECT_EQ((3 << 6) | kTestRegisterCode, iterator.GetNextByte());
-}
-
-TEST_F(EhFrameWriterTest, EhFrameHdrLayout) {
- static const int kCodeSize = 10;
- static const int kPaddingSize = 6;
-
- EhFrameWriter writer(zone());
- writer.Initialize();
- writer.Finish(kCodeSize);
-
- EhFrameIterator iterator = MakeIterator(&writer);
-
- // Skip the .eh_frame.
-
- int encoded_cie_size = iterator.GetNextUInt32();
- iterator.Skip(encoded_cie_size);
- int cie_size = encoded_cie_size + kInt32Size;
-
- int encoded_fde_size = iterator.GetNextUInt32();
- iterator.Skip(encoded_fde_size);
- int fde_size = encoded_fde_size + kInt32Size;
-
- iterator.Skip(EhFrameConstants::kEhFrameTerminatorSize);
-
- int eh_frame_size =
- cie_size + fde_size + EhFrameConstants::kEhFrameTerminatorSize;
-
- //
- // Plugging some numbers in the DSO layout shown in eh-frame.cc:
- //
- // | ... |
- // +---------------+ <-- (E) ---------
- // | | ^
- // | Instructions | 10 bytes | .text
- // | | v
- // +---------------+ <----------------
- // |///////////////|
- // |////Padding////| 6 bytes
- // |///////////////|
- // +---------------+ <---(D)----------
- // | | ^
- // | CIE | cie_size bytes* |
- // | | |
- // +---------------+ <-- (C) |
- // | | | .eh_frame
- // | FDE | fde_size bytes |
- // | | |
- // +---------------+ |
- // | terminator | 4 bytes v
- // +---------------+ <-- (B) ---------
- // | version | ^
- // +---------------+ 4 bytes |
- // | encoding | |
- // | specifiers | |
- // +---------------+ <---(A) | .eh_frame_hdr
- // | offset to | |
- // | .eh_frame | |
- // +---------------+ |
- // | ... | ...
- //
- // (*) the size of the CIE is platform dependent.
- //
-
- int eh_frame_hdr_version = iterator.GetNextByte();
- EXPECT_EQ(EhFrameConstants::kEhFrameHdrVersion, eh_frame_hdr_version);
-
- // .eh_frame pointer encoding specifier.
- EXPECT_EQ(EhFrameConstants::kSData4 | EhFrameConstants::kPcRel,
- iterator.GetNextByte());
-
- // Lookup table size encoding specifier.
- EXPECT_EQ(EhFrameConstants::kUData4, iterator.GetNextByte());
-
- // Lookup table pointers encoding specifier.
- EXPECT_EQ(EhFrameConstants::kSData4 | EhFrameConstants::kDataRel,
- iterator.GetNextByte());
-
- // A -> D
- int offset_to_eh_frame = iterator.GetNextUInt32();
- EXPECT_EQ(-(EhFrameConstants::kFdeVersionSize +
- EhFrameConstants::kFdeEncodingSpecifiersSize + eh_frame_size),
- offset_to_eh_frame);
-
- int lut_entries = iterator.GetNextUInt32();
- EXPECT_EQ(1, lut_entries);
-
- // B -> E
- int offset_to_procedure = iterator.GetNextUInt32();
- EXPECT_EQ(-(eh_frame_size + kPaddingSize + kCodeSize), offset_to_procedure);
-
- // B -> C
- int offset_to_fde = iterator.GetNextUInt32();
- EXPECT_EQ(-(fde_size + EhFrameConstants::kEhFrameTerminatorSize),
- offset_to_fde);
-}
-
-#endif
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