From 0de9f43b879cc4e31766d4607e895641bdda1c21 Mon Sep 17 00:00:00 2001 From: jimblandy Date: Tue, 16 Mar 2010 16:34:52 +0000 Subject: [PATCH] Breakpad DWARF parser: Add support for parsing .eh_frame encoded pointers. The Linux C++ exception handling data format (.eh_frame) can specify a number of different encodings for the addresses it contains. This patch extends dwarf2reader::ByteReader to read pointers encoded in these ways. a=jimblandy, r=nealsid git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@551 4c0a9323-5329-0410-9bdc-e9ce6186880e --- src/common/dwarf/bytereader-inl.h | 26 + src/common/dwarf/bytereader.cc | 160 +++++- src/common/dwarf/bytereader.h | 97 +++- src/common/dwarf/bytereader_unittest.cc | 691 ++++++++++++++++++++++++ src/common/dwarf/dwarf2enums.h | 24 + src/tools/linux/dump_syms/Makefile | 21 + 6 files changed, 1014 insertions(+), 5 deletions(-) create mode 100644 src/common/dwarf/bytereader_unittest.cc diff --git a/src/common/dwarf/bytereader-inl.h b/src/common/dwarf/bytereader-inl.h index e8b4efaa..57fce448 100644 --- a/src/common/dwarf/bytereader-inl.h +++ b/src/common/dwarf/bytereader-inl.h @@ -144,6 +144,32 @@ inline uint64 ByteReader::ReadAddress(const char* buffer) const { return (this->*address_reader_)(buffer); } +inline void ByteReader::SetCFIDataBase(uint64 section_base, + const char *buffer_base) { + section_base_ = section_base; + buffer_base_ = buffer_base; + have_section_base_ = true; +} + +inline void ByteReader::SetTextBase(uint64 text_base) { + text_base_ = text_base; + have_text_base_ = true; +} + +inline void ByteReader::SetDataBase(uint64 data_base) { + data_base_ = data_base; + have_data_base_ = true; +} + +inline void ByteReader::SetFunctionBase(uint64 function_base) { + function_base_ = function_base; + have_function_base_ = true; +} + +inline void ByteReader::ClearFunctionBase() { + have_function_base_ = false; +} + } // namespace dwarf2reader #endif // UTIL_DEBUGINFO_BYTEREADER_INL_H__ diff --git a/src/common/dwarf/bytereader.cc b/src/common/dwarf/bytereader.cc index ca072980..7d784659 100644 --- a/src/common/dwarf/bytereader.cc +++ b/src/common/dwarf/bytereader.cc @@ -27,6 +27,7 @@ // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include +#include #include "common/dwarf/bytereader-inl.h" #include "common/dwarf/bytereader.h" @@ -35,8 +36,9 @@ namespace dwarf2reader { ByteReader::ByteReader(enum Endianness endian) :offset_reader_(NULL), address_reader_(NULL), endian_(endian), - address_size_(0), offset_size_(0) -{ } + address_size_(0), offset_size_(0), + have_section_base_(), have_text_base_(), have_data_base_(), + have_function_base_() { } ByteReader::~ByteReader() { } @@ -77,4 +79,158 @@ uint64 ByteReader::ReadInitialLength(const char* start, size_t* len) { return initial_length; } +bool ByteReader::ValidEncoding(DwarfPointerEncoding encoding) const { + if (encoding == DW_EH_PE_omit) return true; + if (encoding == DW_EH_PE_aligned) return true; + if (DwarfPointerEncoding(encoding & 0x7) > DW_EH_PE_udata8) return false; + if (DwarfPointerEncoding(encoding & 0x70) > DW_EH_PE_funcrel) return false; + return true; +} + +bool ByteReader::UsableEncoding(DwarfPointerEncoding encoding) const { + switch (DwarfPointerEncoding(encoding & 0x70)) { + case DW_EH_PE_absptr: return true; + case DW_EH_PE_pcrel: return have_section_base_; + case DW_EH_PE_textrel: return have_text_base_; + case DW_EH_PE_datarel: return have_data_base_; + case DW_EH_PE_funcrel: return have_function_base_; + default: return false; + } +} + +uint64 ByteReader::ReadEncodedPointer(const char *buffer, + DwarfPointerEncoding encoding, + size_t *len) const { + // This is what the GCC unwinder does. + if (encoding == DW_EH_PE_omit) { + *len = 0; + return 0; + } + + // Aligned pointers are always absolute machine-sized and -signed pointers. + if (encoding == DW_EH_PE_aligned) { + assert(have_section_base_); + + // We don't need to align BUFFER in *our* address space. Rather, we + // need to find the next position in our buffer that would be aligned + // when the .eh_frame section the buffer contains is loaded into the + // program's memory. So align assuming that buffer_base_ gets loaded at + // address section_base_, where section_base_ itself may or may not be + // aligned. + + // First, find the offset to START from the closest prior aligned + // address. + size_t skew = section_base_ & (AddressSize() - 1); + // Now find the offset from that aligned address to buffer. + size_t offset = skew + (buffer - buffer_base_); + // Round up to the next boundary. + size_t aligned = (offset + AddressSize() - 1) & -AddressSize(); + // Convert back to a pointer. + const char *aligned_buffer = buffer_base_ + (aligned - skew); + // Finally, store the length and actually fetch the pointer. + *len = aligned_buffer - buffer + AddressSize(); + return ReadAddress(aligned_buffer); + } + + // Extract the value first, ignoring whether it's a pointer or an + // offset relative to some base. + uint64 offset; + switch (DwarfPointerEncoding(encoding & 0x0f)) { + case DW_EH_PE_absptr: + // As the low nybble value, DW_EH_PE_absptr simply means a + // machine-sized and -signed address; it doesn't mean it's absolute. + // So it is correct for us to relocate after this. + offset = ReadAddress(buffer); + *len = AddressSize(); + break; + + case DW_EH_PE_uleb128: + offset = ReadUnsignedLEB128(buffer, len); + break; + + case DW_EH_PE_udata2: + offset = ReadTwoBytes(buffer); + *len = 2; + break; + + case DW_EH_PE_udata4: + offset = ReadFourBytes(buffer); + *len = 4; + break; + + case DW_EH_PE_udata8: + offset = ReadEightBytes(buffer); + *len = 8; + break; + + case DW_EH_PE_sleb128: + offset = ReadSignedLEB128(buffer, len); + break; + + case DW_EH_PE_sdata2: + offset = ReadTwoBytes(buffer); + // Sign-extend from 16 bits. + offset = (offset ^ 0x8000) - 0x8000; + *len = 2; + break; + + case DW_EH_PE_sdata4: + offset = ReadFourBytes(buffer); + // Sign-extend from 32 bits. + offset = (offset ^ 0x80000000ULL) - 0x80000000ULL; + *len = 4; + break; + + case DW_EH_PE_sdata8: + // No need to sign-extend; this is the full width of our type. + offset = ReadEightBytes(buffer); + *len = 8; + break; + + default: + abort(); + } + + // Find the appropriate base address. + uint64 base; + switch (DwarfPointerEncoding(encoding & 0x70)) { + case DW_EH_PE_absptr: + base = 0; + break; + + case DW_EH_PE_pcrel: + assert(have_section_base_); + base = section_base_ + (buffer - buffer_base_); + break; + + case DW_EH_PE_textrel: + assert(have_text_base_); + base = text_base_; + break; + + case DW_EH_PE_datarel: + assert(have_data_base_); + base = data_base_; + break; + + case DW_EH_PE_funcrel: + assert(have_function_base_); + base = function_base_; + break; + + default: + abort(); + } + + uint64 pointer = base + offset; + + // Remove inappropriate upper bits. + if (AddressSize() == 4) + pointer = pointer & 0xffffffff; + else + assert(AddressSize() == sizeof(uint64)); + + return pointer; +} + } // namespace dwarf2reader diff --git a/src/common/dwarf/bytereader.h b/src/common/dwarf/bytereader.h index bda450d1..aaa97c4f 100644 --- a/src/common/dwarf/bytereader.h +++ b/src/common/dwarf/bytereader.h @@ -33,6 +33,7 @@ #include #include "common/dwarf/types.h" +#include "common/dwarf/dwarf2enums.h" namespace dwarf2reader { @@ -45,13 +46,14 @@ enum Endianness { // A ByteReader knows how to read single- and multi-byte values of // various endiannesses, sizes, and encodings, as used in DWARF -// debugging information. +// debugging information and Linux C++ exception handling data. class ByteReader { public: // Construct a ByteReader capable of reading one-, two-, four-, and // eight-byte values according to ENDIANNESS, absolute machine-sized - // addresses, DWARF-style "initial length" values, and signed and - // unsigned LEB128 numbers. + // addresses, DWARF-style "initial length" values, signed and + // unsigned LEB128 numbers, and Linux C++ exception handling data's + // encoded pointers. explicit ByteReader(enum Endianness endianness); virtual ~ByteReader(); @@ -191,6 +193,89 @@ class ByteReader { // automatically. void SetOffsetSize(uint8 size); + // The Linux C++ ABI uses a variant of DWARF call frame information + // for exception handling. This data is included in the program's + // address space as the ".eh_frame" section, and intepreted at + // runtime to walk the stack, find exception handlers, and run + // cleanup code. The format is mostly the same as DWARF CFI, with + // some adjustments made to provide the additional + // exception-handling data, and to make the data easier to work with + // in memory --- for example, to allow it to be placed in read-only + // memory even when describing position-independent code. + // + // In particular, exception handling data can select a number of + // different encodings for pointers that appear in the data, as + // described by the DwarfPointerEncoding enum. There are actually + // four axes(!) to the encoding: + // + // - The pointer size: pointers can be 2, 4, or 8 bytes long, or use + // the DWARF LEB128 encoding. + // + // - The pointer's signedness: pointers can be signed or unsigned. + // + // - The pointer's base address: the data stored in the exception + // handling data can be the actual address (that is, an absolute + // pointer), or relative to one of a number of different base + // addreses --- including that of the encoded pointer itself, for + // a form of "pc-relative" addressing. + // + // - The pointer may be indirect: it may be the address where the + // true pointer is stored. (This is used to refer to things via + // global offset table entries, program linkage table entries, or + // other tricks used in position-independent code.) + // + // There are also two options that fall outside that matrix + // altogether: the pointer may be omitted, or it may have padding to + // align it on an appropriate address boundary. (That last option + // may seem like it should be just another axis, but it is not.) + + // Indicate that the exception handling data is loaded starting at + // SECTION_BASE, and that the start of its buffer in our own memory + // is BUFFER_BASE. This allows us to find the address that a given + // byte in our buffer would have when loaded into the program the + // data describes. We need this to resolve DW_EH_PE_pcrel pointers. + void SetCFIDataBase(uint64 section_base, const char *buffer_base); + + // Indicate that the base address of the program's ".text" section + // is TEXT_BASE. We need this to resolve DW_EH_PE_textrel pointers. + void SetTextBase(uint64 text_base); + + // Indicate that the base address for DW_EH_PE_datarel pointers is + // DATA_BASE. The proper value depends on the ABI; it is usually the + // address of the global offset table, held in a designated register in + // position-independent code. You will need to look at the startup code + // for the target system to be sure. I tried; my eyes bled. + void SetDataBase(uint64 data_base); + + // Indicate that the base address for the FDE we are processing is + // FUNCTION_BASE. This is the start address of DW_EH_PE_funcrel + // pointers. (This encoding does not seem to be used by the GNU + // toolchain.) + void SetFunctionBase(uint64 function_base); + + // Indicate that we are no longer processing any FDE, so any use of + // a DW_EH_PE_funcrel encoding is an error. + void ClearFunctionBase(); + + // Return true if ENCODING is a valid pointer encoding. + bool ValidEncoding(DwarfPointerEncoding encoding) const; + + // Return true if we have all the information we need to read a + // pointer that uses ENCODING. This checks that the appropriate + // SetFooBase function for ENCODING has been called. + bool UsableEncoding(DwarfPointerEncoding encoding) const; + + // Read an encoded pointer from BUFFER using ENCODING; return the + // absolute address it represents, and set *LEN to the pointer's + // length in bytes, including any padding for aligned pointers. + // + // This function calls 'abort' if ENCODING is invalid or refers to a + // base address this reader hasn't been given, so you should check + // with ValidEncoding and UsableEncoding first if you would rather + // die in a more helpful way. + uint64 ReadEncodedPointer(const char *buffer, DwarfPointerEncoding encoding, + size_t *len) const; + private: // Function pointer type for our address and offset readers. @@ -212,6 +297,12 @@ class ByteReader { Endianness endian_; uint8 address_size_; uint8 offset_size_; + + // Base addresses for Linux C++ exception handling data's encoded pointers. + bool have_section_base_, have_text_base_, have_data_base_; + bool have_function_base_; + uint64 section_base_, text_base_, data_base_, function_base_; + const char *buffer_base_; }; } // namespace dwarf2reader diff --git a/src/common/dwarf/bytereader_unittest.cc b/src/common/dwarf/bytereader_unittest.cc new file mode 100644 index 00000000..5e854c6e --- /dev/null +++ b/src/common/dwarf/bytereader_unittest.cc @@ -0,0 +1,691 @@ +// Copyright (c) 2010, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Original author: Jim Blandy + +// bytereader_unittest.cc: Unit tests for dwarf2reader::ByteReader + +#include + +#include "breakpad_googletest_includes.h" +#include "common/dwarf/bytereader.h" +#include "common/dwarf/bytereader-inl.h" +#include "common/dwarf/cfi_assembler.h" + +using dwarf2reader::ByteReader; +using dwarf2reader::DwarfPointerEncoding; +using dwarf2reader::ENDIANNESS_BIG; +using dwarf2reader::ENDIANNESS_LITTLE; +using google_breakpad::CFISection; +using google_breakpad::TestAssembler::Label; +using google_breakpad::TestAssembler::kBigEndian; +using google_breakpad::TestAssembler::kLittleEndian; +using google_breakpad::TestAssembler::Section; +using std::string; +using testing::Test; + +struct ReaderFixture { + string contents; + size_t pointer_size; +}; + +class Reader: public ReaderFixture, public Test { }; + +TEST_F(Reader, SimpleConstructor) { + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + CFISection section(kBigEndian, 4); + section + .D8(0xc0) + .D16(0xcf0d) + .D32(0x96fdd219) + .D64(0xbbf55fef0825f117ULL) + .ULEB128(0xa0927048ba8121afULL) + .LEB128(-0x4f337badf4483f83LL) + .D32(0xfec319c9); + ASSERT_TRUE(section.GetContents(&contents)); + const char *data = contents.data(); + EXPECT_EQ(0xc0U, reader.ReadOneByte(data)); + EXPECT_EQ(0xcf0dU, reader.ReadTwoBytes(data + 1)); + EXPECT_EQ(0x96fdd219U, reader.ReadFourBytes(data + 3)); + EXPECT_EQ(0xbbf55fef0825f117ULL, reader.ReadEightBytes(data + 7)); + size_t leb128_size; + EXPECT_EQ(0xa0927048ba8121afULL, + reader.ReadUnsignedLEB128(data + 15, &leb128_size)); + EXPECT_EQ(10U, leb128_size); + EXPECT_EQ(-0x4f337badf4483f83LL, + reader.ReadSignedLEB128(data + 25, &leb128_size)); + EXPECT_EQ(10U, leb128_size); + EXPECT_EQ(0xfec319c9, reader.ReadAddress(data + 35)); +} + +TEST_F(Reader, ValidEncodings) { + ByteReader reader(ENDIANNESS_LITTLE); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_absptr))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_omit))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_aligned))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_uleb128))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata2))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata4))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata8))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sleb128))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata2))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata4))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata8))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_funcrel))); + + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x05))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x07))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x0d))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x0f))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x51))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x60))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x70))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0xf0))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0xd0))); +} + +TEST_F(Reader, DW_EH_PE_omit) { + static const char data[1] = { 42 }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + EXPECT_EQ(0U, reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_omit, + &pointer_size)); + EXPECT_EQ(0U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_absptr4) { + static const char data[] = { 0x27, 0x57, 0xea, 0x40 }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(4); + EXPECT_EQ(0x40ea5727U, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_absptr, + &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_absptr8) { + static const char data[] = { + 0x60, 0x27, 0x57, 0xea, 0x40, 0xc2, 0x98, 0x05, 0x01, 0x50 + }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(8); + EXPECT_EQ(0x010598c240ea5727ULL, + reader.ReadEncodedPointer(data + 1, dwarf2reader::DW_EH_PE_absptr, + &pointer_size)); + EXPECT_EQ(8U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_uleb128) { + static const char data[] = { 0x81, 0x84, 0x4c }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(4); + EXPECT_EQ(0x130201U, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_uleb128, + &pointer_size)); + EXPECT_EQ(3U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_udata2) { + static const char data[] = { 0xf4, 0x8d }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + EXPECT_EQ(0xf48dU, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_udata2, + &pointer_size)); + EXPECT_EQ(2U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_udata4) { + static const char data[] = { 0xb2, 0x68, 0xa5, 0x62, 0x8f, 0x8b }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(8); + EXPECT_EQ(0xa5628f8b, + reader.ReadEncodedPointer(data + 2, dwarf2reader::DW_EH_PE_udata4, + &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_udata8Addr8) { + static const char data[] = { + 0x27, 0x04, 0x73, 0x04, 0x69, 0x9f, 0x19, 0xed, 0x8f, 0xfe + }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(8); + EXPECT_EQ(0x8fed199f69047304ULL, + reader.ReadEncodedPointer(data + 1, dwarf2reader::DW_EH_PE_udata8, + &pointer_size)); + EXPECT_EQ(8U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_udata8Addr4) { + static const char data[] = { + 0x27, 0x04, 0x73, 0x04, 0x69, 0x9f, 0x19, 0xed, 0x8f, 0xfe + }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(4); + EXPECT_EQ(0x69047304ULL, + reader.ReadEncodedPointer(data + 1, dwarf2reader::DW_EH_PE_udata8, + &pointer_size)); + EXPECT_EQ(8U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_sleb128) { + static const char data[] = { 0x42, 0xff, 0xfb, 0x73 }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + EXPECT_EQ(-0x030201U & 0xffffffff, + reader.ReadEncodedPointer(data + 1, dwarf2reader::DW_EH_PE_sleb128, + &pointer_size)); + EXPECT_EQ(3U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_sdata2) { + static const char data[] = { 0xb9, 0xbf }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(8); + EXPECT_EQ(0xffffffffffffbfb9ULL, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_sdata2, + &pointer_size)); + EXPECT_EQ(2U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_sdata4) { + static const char data[] = { 0xa0, 0xca, 0xf2, 0xb8, 0xc2, 0xad }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(8); + EXPECT_EQ(0xffffffffadc2b8f2ULL, + reader.ReadEncodedPointer(data + 2, dwarf2reader::DW_EH_PE_sdata4, + &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_sdata8) { + static const char data[] = { + 0xf6, 0x66, 0x57, 0x79, 0xe0, 0x0c, 0x9b, 0x26, 0x87 + }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(8); + EXPECT_EQ(0x87269b0ce0795766ULL, + reader.ReadEncodedPointer(data + 1, dwarf2reader::DW_EH_PE_sdata8, + &pointer_size)); + EXPECT_EQ(8U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_pcrel) { + static const char data[] = { 0x4a, 0x8b, 0x1b, 0x14, 0xc8, 0xc4, 0x02, 0xce }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + DwarfPointerEncoding encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_pcrel + | dwarf2reader::DW_EH_PE_absptr); + reader.SetCFIDataBase(0x89951377, data); + EXPECT_EQ(0x89951377 + 3 + 0x14c8c402, + reader.ReadEncodedPointer(data + 3, encoding, &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_textrel) { + static const char data[] = { 0xd9, 0x0d, 0x05, 0x17, 0xc9, 0x7a, 0x42, 0x1e }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(4); + reader.SetTextBase(0xb91beaf0); + DwarfPointerEncoding encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_textrel + | dwarf2reader::DW_EH_PE_sdata2); + EXPECT_EQ((0xb91beaf0 + 0xffffc917) & 0xffffffff, + reader.ReadEncodedPointer(data + 3, encoding, &pointer_size)); + EXPECT_EQ(2U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_datarel) { + static const char data[] = { 0x16, 0xf2, 0xbb, 0x82, 0x68, 0xa7, 0xbc, 0x39 }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(8); + reader.SetDataBase(0xbef308bd25ce74f0ULL); + DwarfPointerEncoding encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_datarel + | dwarf2reader::DW_EH_PE_sleb128); + EXPECT_EQ(0xbef308bd25ce74f0ULL + 0xfffffffffffa013bULL, + reader.ReadEncodedPointer(data + 2, encoding, &pointer_size)); + EXPECT_EQ(3U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_funcrel) { + static const char data[] = { 0x84, 0xf8, 0x14, 0x01, 0x61, 0xd1, 0x48, 0xc9 }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + reader.SetFunctionBase(0x823c3520); + DwarfPointerEncoding encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_funcrel + | dwarf2reader::DW_EH_PE_udata2); + EXPECT_EQ(0x823c3520 + 0xd148, + reader.ReadEncodedPointer(data + 5, encoding, &pointer_size)); + EXPECT_EQ(2U, pointer_size); +} + +TEST(UsableBase, CFI) { + static const char data[1] = { 0x42 }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetCFIDataBase(0xb31cbd20, data); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_absptr)); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_pcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_textrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_datarel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_funcrel)); + EXPECT_FALSE(reader.UsableEncoding(DwarfPointerEncoding(0x60))); +} + +TEST(UsableBase, Text) { + ByteReader reader(ENDIANNESS_BIG); + reader.SetTextBase(0xa899ccb9); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_absptr)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_pcrel)); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_textrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_datarel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_funcrel)); + EXPECT_FALSE(reader.UsableEncoding(DwarfPointerEncoding(0x60))); +} + +TEST(UsableBase, Data) { + ByteReader reader(ENDIANNESS_BIG); + reader.SetDataBase(0xf7b10bcd); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_absptr)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_pcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_textrel)); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_datarel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_funcrel)); + EXPECT_FALSE(reader.UsableEncoding(DwarfPointerEncoding(0x60))); +} + +TEST(UsableBase, Function) { + ByteReader reader(ENDIANNESS_BIG); + reader.SetFunctionBase(0xc2c0ed81); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_absptr)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_pcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_textrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_datarel)); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_funcrel)); + EXPECT_FALSE(reader.UsableEncoding(DwarfPointerEncoding(0x60))); +} + +TEST(UsableBase, ClearFunction) { + ByteReader reader(ENDIANNESS_BIG); + reader.SetFunctionBase(0xc2c0ed81); + reader.ClearFunctionBase(); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_absptr)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_pcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_textrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_datarel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_funcrel)); + EXPECT_FALSE(reader.UsableEncoding(DwarfPointerEncoding(0x60))); +} + +struct AlignedFixture { + AlignedFixture() : reader(ENDIANNESS_BIG) { reader.SetAddressSize(4); } + static const char data[10]; + ByteReader reader; + size_t pointer_size; +}; + +const char AlignedFixture::data[10] = { + 0xfe, 0x6e, 0x93, 0xd8, 0x34, 0xd5, 0x1c, 0xd3, 0xac, 0x2b +}; + +class Aligned: public AlignedFixture, public Test { }; + +TEST_F(Aligned, DW_EH_PE_aligned0) { + reader.SetCFIDataBase(0xb440305c, data); + EXPECT_EQ(0xfe6e93d8U, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned1) { + reader.SetCFIDataBase(0xb440305d, data); + EXPECT_EQ(0xd834d51cU, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(7U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned2) { + reader.SetCFIDataBase(0xb440305e, data); + EXPECT_EQ(0x93d834d5U, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(6U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned3) { + reader.SetCFIDataBase(0xb440305f, data); + EXPECT_EQ(0x6e93d834U, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(5U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned11) { + reader.SetCFIDataBase(0xb4403061, data); + EXPECT_EQ(0xd834d51cU, + reader.ReadEncodedPointer(data + 1, + dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(6U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned30) { + reader.SetCFIDataBase(0xb4403063, data); + EXPECT_EQ(0x6e93d834U, + reader.ReadEncodedPointer(data + 1, + dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned23) { + reader.SetCFIDataBase(0xb4403062, data); + EXPECT_EQ(0x1cd3ac2bU, + reader.ReadEncodedPointer(data + 3, + dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(7U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned03) { + reader.SetCFIDataBase(0xb4403064, data); + EXPECT_EQ(0x34d51cd3U, + reader.ReadEncodedPointer(data + 3, + dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(5U, pointer_size); +} diff --git a/src/common/dwarf/dwarf2enums.h b/src/common/dwarf/dwarf2enums.h index 1f8e628c..8444821a 100644 --- a/src/common/dwarf/dwarf2enums.h +++ b/src/common/dwarf/dwarf2enums.h @@ -573,5 +573,29 @@ enum DwarfCFI DW_CFA_GNU_negative_offset_extended = 0x2f }; +// Exception handling frame description pointer formats, as described +// by the Linux Standard Base Core Specification 4.0, section 11.5, +// DWARF Extensions. +enum DwarfPointerEncoding + { + DW_EH_PE_absptr = 0x00, + DW_EH_PE_omit = 0xff, + DW_EH_PE_uleb128 = 0x01, + DW_EH_PE_udata2 = 0x02, + DW_EH_PE_udata4 = 0x03, + DW_EH_PE_udata8 = 0x04, + DW_EH_PE_sleb128 = 0x09, + DW_EH_PE_sdata2 = 0x0A, + DW_EH_PE_sdata4 = 0x0B, + DW_EH_PE_sdata8 = 0x0C, + DW_EH_PE_signed = 0x08, + DW_EH_PE_pcrel = 0x10, + DW_EH_PE_textrel = 0x20, + DW_EH_PE_datarel = 0x30, + DW_EH_PE_funcrel = 0x40, + DW_EH_PE_aligned = 0x50, + DW_EH_PE_indirect = 0x80 + }; + } // namespace dwarf2reader #endif // COMMON_DWARF_DWARF2ENUMS_H__ diff --git a/src/tools/linux/dump_syms/Makefile b/src/tools/linux/dump_syms/Makefile index f00c34af..3629cb46 100644 --- a/src/tools/linux/dump_syms/Makefile +++ b/src/tools/linux/dump_syms/Makefile @@ -115,6 +115,7 @@ COVERAGE_SOURCES += stabs_reader.cc VPATH += $(SRC)/common/dwarf bytereader.o: bytereader.cc +COVERAGE_SOURCES += bytereader.cc cfi_assembler.o: cfi_assembler.cc dwarf2diehandler.o: dwarf2diehandler.cc COVERAGE_SOURCES += dwarf2diehandler.cc @@ -311,6 +312,26 @@ clean:: +### Unit tests for google_breakpad::ByteReader +check: check-bytereader_unittest +check-bytereader_unittest: bytereader_unittest +bytereader_unittest: \ + bytereader.o \ + cfi_assembler.o \ + gtest-all.o \ + gtest_main.o \ + module.o \ + test_assembler.o \ + $(empty) +CPP_EXECUTABLES += bytereader_unittest +bytereader_unittest.o: bytereader_unittest.cc +bytereader_unittest.o: override CPPFLAGS += $(GTEST_CPPFLAGS) \ + $(GMOCK_CPPFLAGS) +clean:: + rm -f bytereader_unittest + + + ### Generic compilation rules. # Link C++ executables using the C++ compiler; see CPP_EXECUTABLES above.