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 // 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 <jimb@mozilla.com> <jimb@red-bean.com>

 // dwarf2reader_cfi_unittest.cc: Unit tests for dwarf2reader::CallFrameInfo

 #include <stdlib.h>

 #include <string>

 #include <vector>

 // The '.eh_frame' format, used by the Linux C++ ABI for exception

 // handling, is poorly specified. To help test our support for .eh_frame,

 // if you #define WRITE_ELF while compiling this file, and add the

 // 'include' directory from the binutils, gcc, or gdb source tree to the

 // #include path, then each test that calls the

 // PERHAPS_WRITE_DEBUG_FRAME_FILE or PERHAPS_WRITE_EH_FRAME_FILE will write

 // an ELF file containing a .debug_frame or .eh_frame section; you can then

 // use tools like readelf to examine the test data, and check the tools'

 // interpretation against the test's intentions. Each ELF file is named

 // "cfitest-TEST", where TEST identifies the particular test.

 #ifdef WRITE_ELF

 #include <errno.h>

 #include <stdio.h>

 #include <string.h>

 extern "C" {

 // To compile with WRITE_ELF, you should add the 'include' directory

 // of the binutils, gcc, or gdb source tree to your #include path;

 // that directory contains this header.

 #include "elf/common.h"

 }

 #endif

 #include "breakpad_googletest_includes.h"

 #include "common/dwarf/bytereader-inl.h"

 #include "common/dwarf/cfi_assembler.h"

 #include "common/dwarf/dwarf2reader.h"

 #include "common/using_std_string.h"

 #include "google_breakpad/common/breakpad_types.h"

 using google_breakpad::CFISection;

 using google_breakpad::test_assembler::Label;

 using google_breakpad::test_assembler::kBigEndian;

 using google_breakpad::test_assembler::kLittleEndian;

 using google_breakpad::test_assembler::Section;

 using dwarf2reader::DwarfPointerEncoding;

 using dwarf2reader::ENDIANNESS_BIG;

 using dwarf2reader::ENDIANNESS_LITTLE;

 using dwarf2reader::ByteReader;

 using dwarf2reader::CallFrameInfo;

 using std::vector;

 using testing::InSequence;

 using testing::Return;

 using testing::Sequence;

 using testing::Test;

 using testing::_;

 #ifdef WRITE_ELF

 void WriteELFFrameSection(const char *filename, const char *section_name,

                           const CFISection &section);

 #define PERHAPS_WRITE_DEBUG_FRAME_FILE(name, section)                   \

     WriteELFFrameSection("cfitest-" name, ".debug_frame", section);

 #define PERHAPS_WRITE_EH_FRAME_FILE(name, section)                      \

     WriteELFFrameSection("cfitest-" name, ".eh_frame", section);

 #else

 #define PERHAPS_WRITE_DEBUG_FRAME_FILE(name, section)

 #define PERHAPS_WRITE_EH_FRAME_FILE(name, section)

 #endif

 class MockCallFrameInfoHandler: public CallFrameInfo::Handler {

  public:

   MOCK_METHOD6(Entry, bool(size_t offset, uint64 address, uint64 length,

                            uint8 version, const string &augmentation,

                            unsigned return_address));

   MOCK_METHOD2(UndefinedRule, bool(uint64 address, int reg));

   MOCK_METHOD2(SameValueRule, bool(uint64 address, int reg));

   MOCK_METHOD4(OffsetRule, bool(uint64 address, int reg, int base_register,

                                 long offset));

   MOCK_METHOD4(ValOffsetRule, bool(uint64 address, int reg, int base_register,

                                    long offset));

   MOCK_METHOD3(RegisterRule, bool(uint64 address, int reg, int base_register));

   MOCK_METHOD3(ExpressionRule, bool(uint64 address, int reg,

                                     const string &expression));

   MOCK_METHOD3(ValExpressionRule, bool(uint64 address, int reg,

                                        const string &expression));

   MOCK_METHOD0(End, bool());

   MOCK_METHOD2(PersonalityRoutine, bool(uint64 address, bool indirect));

   MOCK_METHOD2(LanguageSpecificDataArea, bool(uint64 address, bool indirect));

   MOCK_METHOD0(SignalHandler, bool());

 };

 class MockCallFrameErrorReporter: public CallFrameInfo::Reporter {

  public:

   MockCallFrameErrorReporter() : Reporter("mock filename", "mock section") { }

   MOCK_METHOD2(Incomplete, void(uint64, CallFrameInfo::EntryKind));

   MOCK_METHOD1(EarlyEHTerminator, void(uint64));

   MOCK_METHOD2(CIEPointerOutOfRange, void(uint64, uint64));

   MOCK_METHOD2(BadCIEId, void(uint64, uint64));

   MOCK_METHOD2(UnrecognizedVersion, void(uint64, int version));

   MOCK_METHOD2(UnrecognizedAugmentation, void(uint64, const string &));

   MOCK_METHOD2(InvalidPointerEncoding, void(uint64, uint8));

   MOCK_METHOD2(UnusablePointerEncoding, void(uint64, uint8));

   MOCK_METHOD2(RestoreInCIE, void(uint64, uint64));

   MOCK_METHOD3(BadInstruction, void(uint64, CallFrameInfo::EntryKind, uint64));

   MOCK_METHOD3(NoCFARule, void(uint64, CallFrameInfo::EntryKind, uint64));

   MOCK_METHOD3(EmptyStateStack, void(uint64, CallFrameInfo::EntryKind, uint64));

 };

 struct CFIFixture {

   enum { kCFARegister = CallFrameInfo::Handler::kCFARegister };

   CFIFixture() {

     // Default expectations for the data handler.

     //

     // - Leave Entry and End without expectations, as it's probably a

     //   good idea to set those explicitly in each test.

     //

     // - Expect the *Rule functions to not be called, 

     //   so that each test can simply list the calls they expect.

     //

     // I gather I could use StrictMock for this, but the manual seems

     // to suggest using that only as a last resort, and this isn't so

     // bad.

     EXPECT_CALL(handler, UndefinedRule(_, _)).Times(0);

     EXPECT_CALL(handler, SameValueRule(_, _)).Times(0);

     EXPECT_CALL(handler, OffsetRule(_, _, _, _)).Times(0);

     EXPECT_CALL(handler, ValOffsetRule(_, _, _, _)).Times(0);

     EXPECT_CALL(handler, RegisterRule(_, _, _)).Times(0);

     EXPECT_CALL(handler, ExpressionRule(_, _, _)).Times(0);

     EXPECT_CALL(handler, ValExpressionRule(_, _, _)).Times(0);

     EXPECT_CALL(handler, PersonalityRoutine(_, _)).Times(0);

     EXPECT_CALL(handler, LanguageSpecificDataArea(_, _)).Times(0);

     EXPECT_CALL(handler, SignalHandler()).Times(0);

     // Default expectations for the error/warning reporer.

     EXPECT_CALL(reporter, Incomplete(_, _)).Times(0);

     EXPECT_CALL(reporter, EarlyEHTerminator(_)).Times(0);

     EXPECT_CALL(reporter, CIEPointerOutOfRange(_, _)).Times(0);

     EXPECT_CALL(reporter, BadCIEId(_, _)).Times(0);

     EXPECT_CALL(reporter, UnrecognizedVersion(_, _)).Times(0);

     EXPECT_CALL(reporter, UnrecognizedAugmentation(_, _)).Times(0);

     EXPECT_CALL(reporter, InvalidPointerEncoding(_, _)).Times(0);

     EXPECT_CALL(reporter, UnusablePointerEncoding(_, _)).Times(0);

     EXPECT_CALL(reporter, RestoreInCIE(_, _)).Times(0);

     EXPECT_CALL(reporter, BadInstruction(_, _, _)).Times(0);

     EXPECT_CALL(reporter, NoCFARule(_, _, _)).Times(0);

     EXPECT_CALL(reporter, EmptyStateStack(_, _, _)).Times(0);

   }

   MockCallFrameInfoHandler handler;

   MockCallFrameErrorReporter reporter;

 };

 class CFI: public CFIFixture, public Test { };

 TEST_F(CFI, EmptyRegion) {

   EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0);

   EXPECT_CALL(handler, End()).Times(0);

   static const char data[1] = { 42 };

   ByteReader byte_reader(ENDIANNESS_BIG);

   CallFrameInfo parser(data, 0, &byte_reader, &handler, &reporter);

   EXPECT_TRUE(parser.Start());

 }

 TEST_F(CFI, IncompleteLength32) {

   CFISection section(kBigEndian, 8);

   section

       // Not even long enough for an initial length.

       .D16(0xa0f)

       // Padding to keep valgrind happy. We subtract these off when we

       // construct the parser.

       .D16(0);

   EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0);

   EXPECT_CALL(handler, End()).Times(0);

   EXPECT_CALL(reporter, Incomplete(_, CallFrameInfo::kUnknown))

       .WillOnce(Return());

   string contents;

   ASSERT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_BIG);

   byte_reader.SetAddressSize(8);

   CallFrameInfo parser(contents.data(), contents.size() - 2,

                        &byte_reader, &handler, &reporter);

   EXPECT_FALSE(parser.Start());

 }

 TEST_F(CFI, IncompleteLength64) {

   CFISection section(kLittleEndian, 4);

   section

       // An incomplete 64-bit DWARF initial length.

       .D32(0xffffffff).D32(0x71fbaec2)

       // Padding to keep valgrind happy. We subtract these off when we

       // construct the parser.

       .D32(0);

   EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0);

   EXPECT_CALL(handler, End()).Times(0);

   EXPECT_CALL(reporter, Incomplete(_, CallFrameInfo::kUnknown))

       .WillOnce(Return());

   string contents;

   ASSERT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_LITTLE);

   byte_reader.SetAddressSize(4);

   CallFrameInfo parser(contents.data(), contents.size() - 4,

                        &byte_reader, &handler, &reporter);

   EXPECT_FALSE(parser.Start());

 }

 TEST_F(CFI, IncompleteId32) {

   CFISection section(kBigEndian, 8);

   section

       .D32(3)                      // Initial length, not long enough for id

       .D8(0xd7).D8(0xe5).D8(0xf1)  // incomplete id

       .CIEHeader(8727, 3983, 8889, 3, "")

       .FinishEntry();

   EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0);

   EXPECT_CALL(handler, End()).Times(0);

   EXPECT_CALL(reporter, Incomplete(_, CallFrameInfo::kUnknown))

       .WillOnce(Return());

   string contents;

   ASSERT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_BIG);

   byte_reader.SetAddressSize(8);

   CallFrameInfo parser(contents.data(), contents.size(),

                        &byte_reader, &handler, &reporter);

   EXPECT_FALSE(parser.Start());

 }

 TEST_F(CFI, BadId32) {

   CFISection section(kBigEndian, 8);

   section

       .D32(0x100)                       // Initial length

       .D32(0xe802fade)                  // bogus ID

       .Append(0x100 - 4, 0x42);         // make the length true

   section

       .CIEHeader(1672, 9872, 8529, 3, "")

       .FinishEntry();

   EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0);

   EXPECT_CALL(handler, End()).Times(0);

   EXPECT_CALL(reporter, CIEPointerOutOfRange(_, 0xe802fade))

       .WillOnce(Return());

   string contents;

   ASSERT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_BIG);

   byte_reader.SetAddressSize(8);

   CallFrameInfo parser(contents.data(), contents.size(),

                        &byte_reader, &handler, &reporter);

   EXPECT_FALSE(parser.Start());

 }

 // A lone CIE shouldn't cause any handler calls.

 TEST_F(CFI, SingleCIE) {

   CFISection section(kLittleEndian, 4);

   section.CIEHeader(0xffe799a8, 0x3398dcdd, 0x6e9683de, 3, "");

   section.Append(10, dwarf2reader::DW_CFA_nop);

   section.FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("SingleCIE", section);

   EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0);

   EXPECT_CALL(handler, End()).Times(0);

   string contents;

   EXPECT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_LITTLE);

   byte_reader.SetAddressSize(4);

   CallFrameInfo parser(contents.data(), contents.size(),

                        &byte_reader, &handler, &reporter);

   EXPECT_TRUE(parser.Start());

 }

 // One FDE, one CIE.

 TEST_F(CFI, OneFDE) {

   CFISection section(kBigEndian, 4);

   Label cie;

   section

       .Mark(&cie)

       .CIEHeader(0x4be22f75, 0x2492236e, 0x6b6efb87, 3, "")

       .FinishEntry()

       .FDEHeader(cie, 0x7714740d, 0x3d5a10cd)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("OneFDE", section);

   {

     InSequence s;

     EXPECT_CALL(handler,

                 Entry(_, 0x7714740d, 0x3d5a10cd, 3, "", 0x6b6efb87))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End()).WillOnce(Return(true));

   }

   string contents;

   EXPECT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_BIG);

   byte_reader.SetAddressSize(4);

   CallFrameInfo parser(contents.data(), contents.size(),

                        &byte_reader, &handler, &reporter);

   EXPECT_TRUE(parser.Start());

 }

 // Two FDEs share a CIE.

 TEST_F(CFI, TwoFDEsOneCIE) {

   CFISection section(kBigEndian, 4);

   Label cie;

   section

       // First FDE. readelf complains about this one because it makes

       // a forward reference to its CIE.

       .FDEHeader(cie, 0xa42744df, 0xa3b42121)

       .FinishEntry()

       // CIE.

       .Mark(&cie)

       .CIEHeader(0x04f7dc7b, 0x3d00c05f, 0xbd43cb59, 3, "")

       .FinishEntry()

       // Second FDE.

       .FDEHeader(cie, 0x6057d391, 0x700f608d)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("TwoFDEsOneCIE", section);

   {

     InSequence s;

     EXPECT_CALL(handler,

                 Entry(_, 0xa42744df, 0xa3b42121, 3, "", 0xbd43cb59))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End()).WillOnce(Return(true));

   }

   {

     InSequence s;

     EXPECT_CALL(handler,

                 Entry(_, 0x6057d391, 0x700f608d, 3, "", 0xbd43cb59))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End()).WillOnce(Return(true));

   }

   string contents;

   EXPECT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_BIG);

   byte_reader.SetAddressSize(4);

   CallFrameInfo parser(contents.data(), contents.size(),

                        &byte_reader, &handler, &reporter);

   EXPECT_TRUE(parser.Start());

 }

 // Two FDEs, two CIEs.

 TEST_F(CFI, TwoFDEsTwoCIEs) {

   CFISection section(kLittleEndian, 8);

   Label cie1, cie2;

   section

       // First CIE.

       .Mark(&cie1)

       .CIEHeader(0x694d5d45, 0x4233221b, 0xbf45e65a, 3, "")

       .FinishEntry()

       // First FDE which cites second CIE. readelf complains about

       // this one because it makes a forward reference to its CIE.

       .FDEHeader(cie2, 0x778b27dfe5871f05ULL, 0x324ace3448070926ULL)

       .FinishEntry()

       // Second FDE, which cites first CIE.

       .FDEHeader(cie1, 0xf6054ca18b10bf5fULL, 0x45fdb970d8bca342ULL)

       .FinishEntry()

       // Second CIE.

       .Mark(&cie2)

       .CIEHeader(0xfba3fad7, 0x6287e1fd, 0x61d2c581, 2, "")

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("TwoFDEsTwoCIEs", section);

   {

     InSequence s;

     EXPECT_CALL(handler,

                 Entry(_, 0x778b27dfe5871f05ULL, 0x324ace3448070926ULL, 2,

                       "", 0x61d2c581))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End()).WillOnce(Return(true));

   }

   {

     InSequence s;

     EXPECT_CALL(handler,

                 Entry(_, 0xf6054ca18b10bf5fULL, 0x45fdb970d8bca342ULL, 3,

                       "", 0xbf45e65a))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End()).WillOnce(Return(true));

   }

   string contents;

   EXPECT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_LITTLE);

   byte_reader.SetAddressSize(8);

   CallFrameInfo parser(contents.data(), contents.size(),

                        &byte_reader, &handler, &reporter);

   EXPECT_TRUE(parser.Start());

 }

 // An FDE whose CIE specifies a version we don't recognize.

 TEST_F(CFI, BadVersion) {

   CFISection section(kBigEndian, 4);

   Label cie1, cie2;

   section

       .Mark(&cie1)

       .CIEHeader(0xca878cf0, 0x7698ec04, 0x7b616f54, 0x52, "")

       .FinishEntry()

       // We should skip this entry, as its CIE specifies a version we

       // don't recognize.

       .FDEHeader(cie1, 0x08852292, 0x2204004a)

       .FinishEntry()

       // Despite the above, we should visit this entry.

       .Mark(&cie2)

       .CIEHeader(0x7c3ae7c9, 0xb9b9a512, 0x96cb3264, 3, "")

       .FinishEntry()

       .FDEHeader(cie2, 0x2094735a, 0x6e875501)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("BadVersion", section);

   EXPECT_CALL(reporter, UnrecognizedVersion(_, 0x52))

     .WillOnce(Return());

   {

     InSequence s;

     // We should see no mention of the first FDE, but we should get

     // a call to Entry for the second.

     EXPECT_CALL(handler, Entry(_, 0x2094735a, 0x6e875501, 3, "",

                                0x96cb3264))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End())

         .WillOnce(Return(true));

   }

   string contents;

   EXPECT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_BIG);

   byte_reader.SetAddressSize(4);

   CallFrameInfo parser(contents.data(), contents.size(),

                        &byte_reader, &handler, &reporter);

   EXPECT_FALSE(parser.Start());

 }

 // An FDE whose CIE specifies an augmentation we don't recognize.

 TEST_F(CFI, BadAugmentation) {

   CFISection section(kBigEndian, 4);

   Label cie1, cie2;

   section

       .Mark(&cie1)

       .CIEHeader(0x4be22f75, 0x2492236e, 0x6b6efb87, 3, "spaniels!")

       .FinishEntry()

       // We should skip this entry, as its CIE specifies an

       // augmentation we don't recognize.

       .FDEHeader(cie1, 0x7714740d, 0x3d5a10cd)

       .FinishEntry()

       // Despite the above, we should visit this entry.

       .Mark(&cie2)

       .CIEHeader(0xf8bc4399, 0x8cf09931, 0xf2f519b2, 3, "")

       .FinishEntry()

       .FDEHeader(cie2, 0x7bf0fda0, 0xcbcd28d8)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("BadAugmentation", section);

   EXPECT_CALL(reporter, UnrecognizedAugmentation(_, "spaniels!"))

     .WillOnce(Return());

   {

     InSequence s;

     // We should see no mention of the first FDE, but we should get

     // a call to Entry for the second.

     EXPECT_CALL(handler, Entry(_, 0x7bf0fda0, 0xcbcd28d8, 3, "",

                                0xf2f519b2))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End())

         .WillOnce(Return(true));

   }

   string contents;

   EXPECT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_BIG);

   byte_reader.SetAddressSize(4);

   CallFrameInfo parser(contents.data(), contents.size(),

                        &byte_reader, &handler, &reporter);

   EXPECT_FALSE(parser.Start());

 }

 // The return address column field is a byte in CFI version 1

 // (DWARF2), but a ULEB128 value in version 3 (DWARF3).

 TEST_F(CFI, CIEVersion1ReturnColumn) {

   CFISection section(kBigEndian, 4);

   Label cie;

   section

       // CIE, using the version 1 format: return column is a ubyte.

       .Mark(&cie)

       // Use a value for the return column that is parsed differently

       // as a ubyte and as a ULEB128.

       .CIEHeader(0xbcdea24f, 0x5be28286, 0x9f, 1, "")

       .FinishEntry()

       // FDE, citing that CIE.

       .FDEHeader(cie, 0xb8d347b5, 0x825e55dc)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("CIEVersion1ReturnColumn", section);

   {

     InSequence s;

     EXPECT_CALL(handler, Entry(_, 0xb8d347b5, 0x825e55dc, 1, "", 0x9f))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End()).WillOnce(Return(true));

   }

   string contents;

   EXPECT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_BIG);

   byte_reader.SetAddressSize(4);

   CallFrameInfo parser(contents.data(), contents.size(),

                        &byte_reader, &handler, &reporter);

   EXPECT_TRUE(parser.Start());

 }

 // The return address column field is a byte in CFI version 1

 // (DWARF2), but a ULEB128 value in version 3 (DWARF3).

 TEST_F(CFI, CIEVersion3ReturnColumn) {

   CFISection section(kBigEndian, 4);

   Label cie;

   section

       // CIE, using the version 3 format: return column is a ULEB128.

       .Mark(&cie)

       // Use a value for the return column that is parsed differently

       // as a ubyte and as a ULEB128.

       .CIEHeader(0x0ab4758d, 0xc010fdf7, 0x89, 3, "")

       .FinishEntry()

       // FDE, citing that CIE.

       .FDEHeader(cie, 0x86763f2b, 0x2a66dc23)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("CIEVersion3ReturnColumn", section);

   {

     InSequence s;

     EXPECT_CALL(handler, Entry(_, 0x86763f2b, 0x2a66dc23, 3, "", 0x89))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End()).WillOnce(Return(true));

   }

   string contents;

   EXPECT_TRUE(section.GetContents(&contents));

   ByteReader byte_reader(ENDIANNESS_BIG);

   byte_reader.SetAddressSize(4);

   CallFrameInfo parser(contents.data(), contents.size(),

                        &byte_reader, &handler, &reporter);

   EXPECT_TRUE(parser.Start());

 }

 struct CFIInsnFixture: public CFIFixture {

   CFIInsnFixture() : CFIFixture() {

     data_factor = 0xb6f;

     return_register = 0x9be1ed9f;

     version = 3;

     cfa_base_register = 0x383a3aa;

     cfa_offset = 0xf748;

   }

   // Prepare SECTION to receive FDE instructions.

   //

   // - Append a stock CIE header that establishes the fixture's

   //   code_factor, data_factor, return_register, version, and

   //   augmentation values.

   // - Have the CIE set up a CFA rule using cfa_base_register and

   //   cfa_offset.

   // - Append a stock FDE header, referring to the above CIE, for the

   //   fde_size bytes at fde_start. Choose fde_start and fde_size

   //   appropriately for the section's address size.

   // - Set appropriate expectations on handler in sequence s for the

   //   frame description entry and the CIE's CFA rule.

   //

   // On return, SECTION is ready to have FDE instructions appended to

   // it, and its FinishEntry member called.

   void StockCIEAndFDE(CFISection *section) {

     // Choose appropriate constants for our address size.

     if (section->AddressSize() == 4) {

       fde_start = 0xc628ecfbU;

       fde_size = 0x5dee04a2;

       code_factor = 0x60b;

     } else {

       assert(section->AddressSize() == 8);

       fde_start = 0x0005c57ce7806bd3ULL;

       fde_size = 0x2699521b5e333100ULL;

       code_factor = 0x01008e32855274a8ULL;

     }

     // Create the CIE.

     (*section)

         .Mark(&cie_label)

         .CIEHeader(code_factor, data_factor, return_register, version,

                    "")

         .D8(dwarf2reader::DW_CFA_def_cfa)

         .ULEB128(cfa_base_register)

         .ULEB128(cfa_offset)

         .FinishEntry();

     // Create the FDE.

     section->FDEHeader(cie_label, fde_start, fde_size);

     // Expect an Entry call for the FDE and a ValOffsetRule call for the

     // CIE's CFA rule.

     EXPECT_CALL(handler, Entry(_, fde_start, fde_size, version, "",

                                return_register))

         .InSequence(s)

         .WillOnce(Return(true));

     EXPECT_CALL(handler, ValOffsetRule(fde_start, kCFARegister,

                                        cfa_base_register, cfa_offset))

       .InSequence(s)

       .WillOnce(Return(true));

   }

   // Run the contents of SECTION through a CallFrameInfo parser,

   // expecting parser.Start to return SUCCEEDS

   void ParseSection(CFISection *section, bool succeeds = true) {

     string contents;

     EXPECT_TRUE(section->GetContents(&contents));

     dwarf2reader::Endianness endianness;

     if (section->endianness() == kBigEndian)

       endianness = ENDIANNESS_BIG;

     else {

       assert(section->endianness() == kLittleEndian);

       endianness = ENDIANNESS_LITTLE;

     }

     ByteReader byte_reader(endianness);

     byte_reader.SetAddressSize(section->AddressSize());

     CallFrameInfo parser(contents.data(), contents.size(),

                          &byte_reader, &handler, &reporter);

     if (succeeds)

       EXPECT_TRUE(parser.Start());

     else

       EXPECT_FALSE(parser.Start());

   }

   Label cie_label;

   Sequence s;

   uint64 code_factor;

   int data_factor;

   unsigned return_register;

   unsigned version;

   unsigned cfa_base_register;

   int cfa_offset;

   uint64 fde_start, fde_size;

 };

 class CFIInsn: public CFIInsnFixture, public Test { };

 TEST_F(CFIInsn, DW_CFA_set_loc) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_set_loc).D32(0xb1ee3e7a)

       // Use DW_CFA_def_cfa to force a handler call that we can use to

       // check the effect of the DW_CFA_set_loc.

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x4defb431).ULEB128(0x6d17b0ee)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_set_loc", section);

   EXPECT_CALL(handler,

               ValOffsetRule(0xb1ee3e7a, kCFARegister, 0x4defb431, 0x6d17b0ee))

       .InSequence(s)

       .WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_advance_loc) {

   CFISection section(kBigEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_advance_loc | 0x2a)

       // Use DW_CFA_def_cfa to force a handler call that we can use to

       // check the effect of the DW_CFA_advance_loc.

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x5bbb3715).ULEB128(0x0186c7bf)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_advance_loc", section);

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start + 0x2a * code_factor,

                             kCFARegister, 0x5bbb3715, 0x0186c7bf))

         .InSequence(s)

         .WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_advance_loc1) {

   CFISection section(kLittleEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_advance_loc1).D8(0xd8)

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x69d5696a).ULEB128(0x1eb7fc93)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_advance_loc1", section);

   EXPECT_CALL(handler,

               ValOffsetRule((fde_start + 0xd8 * code_factor),

                             kCFARegister, 0x69d5696a, 0x1eb7fc93))

       .InSequence(s)

       .WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_advance_loc2) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_advance_loc2).D16(0x3adb)

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x3a368bed).ULEB128(0x3194ee37)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_advance_loc2", section);

   EXPECT_CALL(handler,

               ValOffsetRule((fde_start + 0x3adb * code_factor),

                             kCFARegister, 0x3a368bed, 0x3194ee37))

       .InSequence(s)

       .WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_advance_loc4) {

   CFISection section(kBigEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_advance_loc4).D32(0x15813c88)

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x135270c5).ULEB128(0x24bad7cb)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_advance_loc4", section);

   EXPECT_CALL(handler,

               ValOffsetRule((fde_start + 0x15813c88ULL * code_factor),

                             kCFARegister, 0x135270c5, 0x24bad7cb))

       .InSequence(s)

       .WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_MIPS_advance_loc8) {

   code_factor = 0x2d;

   CFISection section(kBigEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_MIPS_advance_loc8).D64(0x3c4f3945b92c14ULL)

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0xe17ed602).ULEB128(0x3d162e7f)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_advance_loc8", section);

   EXPECT_CALL(handler,

               ValOffsetRule((fde_start + 0x3c4f3945b92c14ULL * code_factor),

                             kCFARegister, 0xe17ed602, 0x3d162e7f))

       .InSequence(s)

       .WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_def_cfa) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x4e363a85).ULEB128(0x815f9aa7)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_def_cfa", section);

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, kCFARegister, 0x4e363a85, 0x815f9aa7))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_def_cfa_sf) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_def_cfa_sf).ULEB128(0x8ccb32b7).LEB128(0x9ea)

       .D8(dwarf2reader::DW_CFA_def_cfa_sf).ULEB128(0x9b40f5da).LEB128(-0x40a2)

       .FinishEntry();

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, kCFARegister, 0x8ccb32b7,

                             0x9ea * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, kCFARegister, 0x9b40f5da,

                             -0x40a2 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_def_cfa_register) {

   CFISection section(kLittleEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_def_cfa_register).ULEB128(0x3e7e9363)

       .FinishEntry();

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, kCFARegister, 0x3e7e9363, cfa_offset))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 // DW_CFA_def_cfa_register should have no effect when applied to a

 // non-base/offset rule.

 TEST_F(CFIInsn, DW_CFA_def_cfa_registerBadRule) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_def_cfa_expression).Block("needle in a haystack")

       .D8(dwarf2reader::DW_CFA_def_cfa_register).ULEB128(0xf1b49e49)

       .FinishEntry();

   EXPECT_CALL(handler,

               ValExpressionRule(fde_start, kCFARegister,

                                 "needle in a haystack"))

       .WillRepeatedly(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_def_cfa_offset) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_def_cfa_offset).ULEB128(0x1e8e3b9b)

       .FinishEntry();

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, kCFARegister, cfa_base_register,

                             0x1e8e3b9b))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_def_cfa_offset_sf) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_def_cfa_offset_sf).LEB128(0x970)

       .D8(dwarf2reader::DW_CFA_def_cfa_offset_sf).LEB128(-0x2cd)

       .FinishEntry();

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, kCFARegister, cfa_base_register,

                             0x970 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, kCFARegister, cfa_base_register,

                             -0x2cd * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 // DW_CFA_def_cfa_offset should have no effect when applied to a

 // non-base/offset rule.

 TEST_F(CFIInsn, DW_CFA_def_cfa_offsetBadRule) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_def_cfa_expression).Block("six ways to Sunday")

       .D8(dwarf2reader::DW_CFA_def_cfa_offset).ULEB128(0x1e8e3b9b)

       .FinishEntry();

   EXPECT_CALL(handler,

               ValExpressionRule(fde_start, kCFARegister, "six ways to Sunday"))

       .WillRepeatedly(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_def_cfa_expression) {

   CFISection section(kLittleEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_def_cfa_expression).Block("eating crow")

       .FinishEntry();

   EXPECT_CALL(handler, ValExpressionRule(fde_start, kCFARegister,

                                          "eating crow"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_undefined) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x300ce45d)

       .FinishEntry();

   EXPECT_CALL(handler, UndefinedRule(fde_start, 0x300ce45d))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_same_value) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_same_value).ULEB128(0x3865a760)

       .FinishEntry();

   EXPECT_CALL(handler, SameValueRule(fde_start, 0x3865a760))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_offset) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_offset | 0x2c).ULEB128(0x9f6)

       .FinishEntry();

   EXPECT_CALL(handler,

               OffsetRule(fde_start, 0x2c, kCFARegister, 0x9f6 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_offset_extended) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_offset_extended).ULEB128(0x402b).ULEB128(0xb48)

       .FinishEntry();

   EXPECT_CALL(handler,

               OffsetRule(fde_start, 0x402b, kCFARegister, 0xb48 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_offset_extended_sf) {

   CFISection section(kBigEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_offset_extended_sf)

           .ULEB128(0x997c23ee).LEB128(0x2d00)

       .D8(dwarf2reader::DW_CFA_offset_extended_sf)

           .ULEB128(0x9519eb82).LEB128(-0xa77)

       .FinishEntry();

   EXPECT_CALL(handler,

               OffsetRule(fde_start, 0x997c23ee,

                          kCFARegister, 0x2d00 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler,

               OffsetRule(fde_start, 0x9519eb82,

                          kCFARegister, -0xa77 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_val_offset) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_val_offset).ULEB128(0x623562fe).ULEB128(0x673)

       .FinishEntry();

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, 0x623562fe,

                             kCFARegister, 0x673 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_val_offset_sf) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_val_offset_sf).ULEB128(0x6f4f).LEB128(0xaab)

       .D8(dwarf2reader::DW_CFA_val_offset_sf).ULEB128(0x2483).LEB128(-0x8a2)

       .FinishEntry();

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, 0x6f4f,

                             kCFARegister, 0xaab * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, 0x2483,

                             kCFARegister, -0x8a2 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_register) {

   CFISection section(kLittleEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_register).ULEB128(0x278d18f9).ULEB128(0x1a684414)

       .FinishEntry();

   EXPECT_CALL(handler, RegisterRule(fde_start, 0x278d18f9, 0x1a684414))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_expression) {

   CFISection section(kBigEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_expression).ULEB128(0xa1619fb2)

       .Block("plus ça change, plus c'est la même chose")

       .FinishEntry();

   EXPECT_CALL(handler,

               ExpressionRule(fde_start, 0xa1619fb2,

                              "plus ça change, plus c'est la même chose"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_val_expression) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_val_expression).ULEB128(0xc5e4a9e3)

       .Block("he who has the gold makes the rules")

       .FinishEntry();

   EXPECT_CALL(handler,

               ValExpressionRule(fde_start, 0xc5e4a9e3,

                                 "he who has the gold makes the rules"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_restore) {

   CFISection section(kLittleEndian, 8);

   code_factor = 0x01bd188a9b1fa083ULL;

   data_factor = -0x1ac8;

   return_register = 0x8c35b049;

   version = 2;

   fde_start = 0x2d70fe998298bbb1ULL;

   fde_size = 0x46ccc2e63cf0b108ULL;

   Label cie;

   section

       .Mark(&cie)

       .CIEHeader(code_factor, data_factor, return_register, version,

                  "")

       // Provide a CFA rule, because register rules require them.

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x6ca1d50e).ULEB128(0x372e38e8)

       // Provide an offset(N) rule for register 0x3c.

       .D8(dwarf2reader::DW_CFA_offset | 0x3c).ULEB128(0xb348)

       .FinishEntry()

       // In the FDE...

       .FDEHeader(cie, fde_start, fde_size)

       // At a second address, provide a new offset(N) rule for register 0x3c.

       .D8(dwarf2reader::DW_CFA_advance_loc | 0x13)

       .D8(dwarf2reader::DW_CFA_offset | 0x3c).ULEB128(0x9a50)

       // At a third address, restore the original rule for register 0x3c.

       .D8(dwarf2reader::DW_CFA_advance_loc | 0x01)

       .D8(dwarf2reader::DW_CFA_restore | 0x3c)

       .FinishEntry();

   {

     InSequence s;

     EXPECT_CALL(handler,

                 Entry(_, fde_start, fde_size, version, "", return_register))

         .WillOnce(Return(true));

     // CIE's CFA rule.

     EXPECT_CALL(handler,

                 ValOffsetRule(fde_start, kCFARegister, 0x6ca1d50e, 0x372e38e8))

         .WillOnce(Return(true));

     // CIE's rule for register 0x3c.

     EXPECT_CALL(handler,

                 OffsetRule(fde_start, 0x3c, kCFARegister, 0xb348 * data_factor))

         .WillOnce(Return(true));

     // FDE's rule for register 0x3c.

     EXPECT_CALL(handler,

                 OffsetRule(fde_start + 0x13 * code_factor, 0x3c,

                            kCFARegister, 0x9a50 * data_factor))

         .WillOnce(Return(true));

     // Restore CIE's rule for register 0x3c.

     EXPECT_CALL(handler,

                 OffsetRule(fde_start + (0x13 + 0x01) * code_factor, 0x3c,

                            kCFARegister, 0xb348 * data_factor))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End()).WillOnce(Return(true));

   }

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_restoreNoRule) {

   CFISection section(kBigEndian, 4);

   code_factor = 0x005f78143c1c3b82ULL;

   data_factor = 0x25d0;

   return_register = 0xe8;

   version = 1;

   fde_start = 0x4062e30f;

   fde_size = 0x5302a389;

   Label cie;

   section

       .Mark(&cie)

       .CIEHeader(code_factor, data_factor, return_register, version, "")

       // Provide a CFA rule, because register rules require them.

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x470aa334).ULEB128(0x099ef127)

       .FinishEntry()

       // In the FDE...

       .FDEHeader(cie, fde_start, fde_size)

       // At a second address, provide an offset(N) rule for register 0x2c.

       .D8(dwarf2reader::DW_CFA_advance_loc | 0x7)

       .D8(dwarf2reader::DW_CFA_offset | 0x2c).ULEB128(0x1f47)

       // At a third address, restore the (missing) CIE rule for register 0x2c.

       .D8(dwarf2reader::DW_CFA_advance_loc | 0xb)

       .D8(dwarf2reader::DW_CFA_restore | 0x2c)

       .FinishEntry();

   {

     InSequence s;

     EXPECT_CALL(handler,

                 Entry(_, fde_start, fde_size, version, "", return_register))

         .WillOnce(Return(true));

     // CIE's CFA rule.

     EXPECT_CALL(handler,

                 ValOffsetRule(fde_start, kCFARegister, 0x470aa334, 0x099ef127))

         .WillOnce(Return(true));

     // FDE's rule for register 0x2c.

     EXPECT_CALL(handler,

                 OffsetRule(fde_start + 0x7 * code_factor, 0x2c,

                            kCFARegister, 0x1f47 * data_factor))

         .WillOnce(Return(true));

     // Restore CIE's (missing) rule for register 0x2c.

     EXPECT_CALL(handler,

                 SameValueRule(fde_start + (0x7 + 0xb) * code_factor, 0x2c))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End()).WillOnce(Return(true));

   }

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_restore_extended) {

   CFISection section(kBigEndian, 4);

   code_factor = 0x126e;

   data_factor = -0xd8b;

   return_register = 0x77711787;

   version = 3;

   fde_start = 0x01f55a45;

   fde_size = 0x452adb80;

   Label cie;

   section

       .Mark(&cie)

       .CIEHeader(code_factor, data_factor, return_register, version,

                  "", true /* dwarf64 */ )

       // Provide a CFA rule, because register rules require them.

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x56fa0edd).ULEB128(0x097f78a5)

       // Provide an offset(N) rule for register 0x0f9b8a1c.

       .D8(dwarf2reader::DW_CFA_offset_extended)

           .ULEB128(0x0f9b8a1c).ULEB128(0xc979)

       .FinishEntry()

       // In the FDE...

       .FDEHeader(cie, fde_start, fde_size)

       // At a second address, provide a new offset(N) rule for reg 0x0f9b8a1c.

       .D8(dwarf2reader::DW_CFA_advance_loc | 0x3)

       .D8(dwarf2reader::DW_CFA_offset_extended)

           .ULEB128(0x0f9b8a1c).ULEB128(0x3b7b)

       // At a third address, restore the original rule for register 0x0f9b8a1c.

       .D8(dwarf2reader::DW_CFA_advance_loc | 0x04)

       .D8(dwarf2reader::DW_CFA_restore_extended).ULEB128(0x0f9b8a1c)

       .FinishEntry();

   {

     InSequence s;

     EXPECT_CALL(handler,

                 Entry(_, fde_start, fde_size, version, "", return_register))

         .WillOnce(Return(true));

     // CIE's CFA rule.

     EXPECT_CALL(handler,

                 ValOffsetRule(fde_start, kCFARegister, 0x56fa0edd, 0x097f78a5))

         .WillOnce(Return(true));

     // CIE's rule for register 0x0f9b8a1c.

     EXPECT_CALL(handler,

                 OffsetRule(fde_start, 0x0f9b8a1c, kCFARegister,

                            0xc979 * data_factor))

         .WillOnce(Return(true));

     // FDE's rule for register 0x0f9b8a1c.

     EXPECT_CALL(handler,

                 OffsetRule(fde_start + 0x3 * code_factor, 0x0f9b8a1c,

                            kCFARegister, 0x3b7b * data_factor))

         .WillOnce(Return(true));

     // Restore CIE's rule for register 0x0f9b8a1c.

     EXPECT_CALL(handler,

                 OffsetRule(fde_start + (0x3 + 0x4) * code_factor, 0x0f9b8a1c,

                            kCFARegister, 0xc979 * data_factor))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End()).WillOnce(Return(true));

   }

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_remember_and_restore_state) {

   CFISection section(kLittleEndian, 8);

   StockCIEAndFDE(&section);

   // We create a state, save it, modify it, and then restore. We

   // refer to the state that is overridden the restore as the

   // "outgoing" state, and the restored state the "incoming" state.

   //

   // Register         outgoing        incoming        expect

   // 1                offset(N)       no rule         new "same value" rule

   // 2                register(R)     offset(N)       report changed rule

   // 3                offset(N)       offset(M)       report changed offset

   // 4                offset(N)       offset(N)       no report

   // 5                offset(N)       no rule         new "same value" rule

   section

       // Create the "incoming" state, which we will save and later restore.

       .D8(dwarf2reader::DW_CFA_offset | 2).ULEB128(0x9806)

       .D8(dwarf2reader::DW_CFA_offset | 3).ULEB128(0x995d)

       .D8(dwarf2reader::DW_CFA_offset | 4).ULEB128(0x7055)

       .D8(dwarf2reader::DW_CFA_remember_state)

       // Advance to a new instruction; an implementation could legitimately

       // ignore all but the final rule for a given register at a given address.

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       // Create the "outgoing" state, which we will discard.

       .D8(dwarf2reader::DW_CFA_offset | 1).ULEB128(0xea1a)

       .D8(dwarf2reader::DW_CFA_register).ULEB128(2).ULEB128(0x1d2a3767)

       .D8(dwarf2reader::DW_CFA_offset | 3).ULEB128(0xdd29)

       .D8(dwarf2reader::DW_CFA_offset | 5).ULEB128(0xf1ce)

       // At a third address, restore the incoming state.

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   uint64 addr = fde_start;

   // Expect the incoming rules to be reported.

   EXPECT_CALL(handler, OffsetRule(addr, 2, kCFARegister, 0x9806 * data_factor))

     .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, OffsetRule(addr, 3, kCFARegister, 0x995d * data_factor))

     .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, OffsetRule(addr, 4, kCFARegister, 0x7055 * data_factor))

     .InSequence(s).WillOnce(Return(true));

   addr += code_factor;

   // After the save, we establish the outgoing rule set.

   EXPECT_CALL(handler, OffsetRule(addr, 1, kCFARegister, 0xea1a * data_factor))

     .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, RegisterRule(addr, 2, 0x1d2a3767))

     .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, OffsetRule(addr, 3, kCFARegister, 0xdd29 * data_factor))

     .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, OffsetRule(addr, 5, kCFARegister, 0xf1ce * data_factor))

     .InSequence(s).WillOnce(Return(true));

   addr += code_factor;

   // Finally, after the restore, expect to see the differences from

   // the outgoing to the incoming rules reported.

   EXPECT_CALL(handler, SameValueRule(addr, 1))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, OffsetRule(addr, 2, kCFARegister, 0x9806 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, OffsetRule(addr, 3, kCFARegister, 0x995d * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, SameValueRule(addr, 5))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 // Check that restoring a rule set reports changes to the CFA rule.

 TEST_F(CFIInsn, DW_CFA_remember_and_restore_stateCFA) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_def_cfa_offset).ULEB128(0x90481102)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, ValOffsetRule(fde_start + code_factor, kCFARegister,

                                      cfa_base_register, 0x90481102))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ValOffsetRule(fde_start + code_factor * 2, kCFARegister,

                                      cfa_base_register, cfa_offset))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_nop) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_nop)

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x3fb8d4f1).ULEB128(0x078dc67b)

       .D8(dwarf2reader::DW_CFA_nop)

       .FinishEntry();

   EXPECT_CALL(handler,

               ValOffsetRule(fde_start, kCFARegister, 0x3fb8d4f1, 0x078dc67b))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_GNU_window_save) {

   CFISection section(kBigEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_GNU_window_save)

       .FinishEntry();

   // Don't include all the rules in any particular sequence.

   // The caller's %o0-%o7 have become the callee's %i0-%i7. This is

   // the GCC register numbering.

   for (int i = 8; i < 16; i++)

     EXPECT_CALL(handler, RegisterRule(fde_start, i, i + 16))

         .WillOnce(Return(true));

   // The caller's %l0-%l7 and %i0-%i7 have been saved at the top of

   // its frame.

   for (int i = 16; i < 32; i++)

     EXPECT_CALL(handler, OffsetRule(fde_start, i, kCFARegister, (i-16) * 4))

         .WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_GNU_args_size) {

   CFISection section(kLittleEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_GNU_args_size).ULEB128(0xeddfa520)

       // Verify that we see this, meaning we parsed the above properly.

       .D8(dwarf2reader::DW_CFA_offset | 0x23).ULEB128(0x269)

       .FinishEntry();

   EXPECT_CALL(handler,

               OffsetRule(fde_start, 0x23, kCFARegister, 0x269 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIInsn, DW_CFA_GNU_negative_offset_extended) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_GNU_negative_offset_extended)

       .ULEB128(0x430cc87a).ULEB128(0x613)

       .FinishEntry();

   EXPECT_CALL(handler,

               OffsetRule(fde_start, 0x430cc87a,

                          kCFARegister, -0x613 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true));

   ParseSection(&section);

 }

 // Three FDEs: skip the second

 TEST_F(CFIInsn, SkipFDE) {

   CFISection section(kBigEndian, 4);

   Label cie;

   section

       // CIE, used by all FDEs.

       .Mark(&cie)

       .CIEHeader(0x010269f2, 0x9177, 0xedca5849, 2, "")

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x42ed390b).ULEB128(0x98f43aad)

       .FinishEntry()

       // First FDE.

       .FDEHeader(cie, 0xa870ebdd, 0x60f6aa4)

       .D8(dwarf2reader::DW_CFA_register).ULEB128(0x3a860351).ULEB128(0x6c9a6bcf)

       .FinishEntry()

       // Second FDE.

       .FDEHeader(cie, 0xc534f7c0, 0xf6552e9, true /* dwarf64 */)

       .D8(dwarf2reader::DW_CFA_register).ULEB128(0x1b62c234).ULEB128(0x26586b18)

       .FinishEntry()

       // Third FDE.

       .FDEHeader(cie, 0xf681cfc8, 0x7e4594e)

       .D8(dwarf2reader::DW_CFA_register).ULEB128(0x26c53934).ULEB128(0x18eeb8a4)

       .FinishEntry();

   {

     InSequence s;

     // Process the first FDE.

     EXPECT_CALL(handler, Entry(_, 0xa870ebdd, 0x60f6aa4, 2, "", 0xedca5849))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, ValOffsetRule(0xa870ebdd, kCFARegister,

                                        0x42ed390b, 0x98f43aad))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, RegisterRule(0xa870ebdd, 0x3a860351, 0x6c9a6bcf))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End())

         .WillOnce(Return(true));

     // Skip the second FDE.

     EXPECT_CALL(handler, Entry(_, 0xc534f7c0, 0xf6552e9, 2, "", 0xedca5849))

         .WillOnce(Return(false));

     // Process the third FDE.

     EXPECT_CALL(handler, Entry(_, 0xf681cfc8, 0x7e4594e, 2, "", 0xedca5849))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, ValOffsetRule(0xf681cfc8, kCFARegister,

                                        0x42ed390b, 0x98f43aad))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, RegisterRule(0xf681cfc8, 0x26c53934, 0x18eeb8a4))

         .WillOnce(Return(true));

     EXPECT_CALL(handler, End())

         .WillOnce(Return(true));

   }

   ParseSection(&section);

 }

 // Quit processing in the middle of an entry's instructions.

 TEST_F(CFIInsn, QuitMidentry) {

   CFISection section(kLittleEndian, 8);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_register).ULEB128(0xe0cf850d).ULEB128(0x15aab431)

       .D8(dwarf2reader::DW_CFA_expression).ULEB128(0x46750aa5).Block("meat")

       .FinishEntry();

   EXPECT_CALL(handler, RegisterRule(fde_start, 0xe0cf850d, 0x15aab431))

       .InSequence(s).WillOnce(Return(false));

   EXPECT_CALL(handler, End())

       .InSequence(s).WillOnce(Return(true));

   ParseSection(&section, false);

 }

 class CFIRestore: public CFIInsnFixture, public Test { };

 TEST_F(CFIRestore, RestoreUndefinedRuleUnchanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x0bac878e)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, UndefinedRule(fde_start, 0x0bac878e))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreUndefinedRuleChanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x7dedff5f)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_same_value).ULEB128(0x7dedff5f)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, UndefinedRule(fde_start, 0x7dedff5f))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, SameValueRule(fde_start + code_factor, 0x7dedff5f))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, UndefinedRule(fde_start + 2 * code_factor, 0x7dedff5f))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreSameValueRuleUnchanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_same_value).ULEB128(0xadbc9b3a)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, SameValueRule(fde_start, 0xadbc9b3a))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreSameValueRuleChanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_same_value).ULEB128(0x3d90dcb5)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x3d90dcb5)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, SameValueRule(fde_start, 0x3d90dcb5))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0x3d90dcb5))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, SameValueRule(fde_start + 2 * code_factor, 0x3d90dcb5))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreOffsetRuleUnchanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_offset | 0x14).ULEB128(0xb6f)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, OffsetRule(fde_start, 0x14,

                                   kCFARegister, 0xb6f * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreOffsetRuleChanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_offset | 0x21).ULEB128(0xeb7)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x21)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, OffsetRule(fde_start, 0x21,

                                   kCFARegister, 0xeb7 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0x21))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, OffsetRule(fde_start + 2 * code_factor, 0x21,

                                   kCFARegister, 0xeb7 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreOffsetRuleChangedOffset) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_offset | 0x21).ULEB128(0x134)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_offset | 0x21).ULEB128(0xf4f)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, OffsetRule(fde_start, 0x21,

                                   kCFARegister, 0x134 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, OffsetRule(fde_start + code_factor, 0x21,

                                   kCFARegister, 0xf4f * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, OffsetRule(fde_start + 2 * code_factor, 0x21,

                                   kCFARegister, 0x134 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreValOffsetRuleUnchanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_val_offset).ULEB128(0x829caee6).ULEB128(0xe4c)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, ValOffsetRule(fde_start, 0x829caee6,

                                   kCFARegister, 0xe4c * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreValOffsetRuleChanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_val_offset).ULEB128(0xf17c36d6).ULEB128(0xeb7)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0xf17c36d6)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, ValOffsetRule(fde_start, 0xf17c36d6,

                                   kCFARegister, 0xeb7 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0xf17c36d6))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ValOffsetRule(fde_start + 2 * code_factor, 0xf17c36d6,

                                   kCFARegister, 0xeb7 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreValOffsetRuleChangedValOffset) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_val_offset).ULEB128(0x2cf0ab1b).ULEB128(0x562)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_val_offset).ULEB128(0x2cf0ab1b).ULEB128(0xe88)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, ValOffsetRule(fde_start, 0x2cf0ab1b,

                                   kCFARegister, 0x562 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ValOffsetRule(fde_start + code_factor, 0x2cf0ab1b,

                                   kCFARegister, 0xe88 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ValOffsetRule(fde_start + 2 * code_factor, 0x2cf0ab1b,

                                   kCFARegister, 0x562 * data_factor))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreRegisterRuleUnchanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_register).ULEB128(0x77514acc).ULEB128(0x464de4ce)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, RegisterRule(fde_start, 0x77514acc, 0x464de4ce))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreRegisterRuleChanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_register).ULEB128(0xe39acce5).ULEB128(0x095f1559)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0xe39acce5)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, RegisterRule(fde_start, 0xe39acce5, 0x095f1559))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0xe39acce5))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, RegisterRule(fde_start + 2 * code_factor, 0xe39acce5,

                                     0x095f1559))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreRegisterRuleChangedRegister) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_register).ULEB128(0xd40e21b1).ULEB128(0x16607d6a)

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_register).ULEB128(0xd40e21b1).ULEB128(0xbabb4742)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, RegisterRule(fde_start, 0xd40e21b1, 0x16607d6a))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, RegisterRule(fde_start + code_factor, 0xd40e21b1,

                                     0xbabb4742))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, RegisterRule(fde_start + 2 * code_factor, 0xd40e21b1,

                                     0x16607d6a))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreExpressionRuleUnchanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_expression).ULEB128(0x666ae152).Block("dwarf")

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, ExpressionRule(fde_start, 0x666ae152, "dwarf"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreExpressionRuleChanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_expression).ULEB128(0xb5ca5c46).Block("elf")

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0xb5ca5c46)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, ExpressionRule(fde_start, 0xb5ca5c46, "elf"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0xb5ca5c46))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ExpressionRule(fde_start + 2 * code_factor, 0xb5ca5c46,

                                       "elf"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreExpressionRuleChangedExpression) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_expression).ULEB128(0x500f5739).Block("smurf")

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_expression).ULEB128(0x500f5739).Block("orc")

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, ExpressionRule(fde_start, 0x500f5739, "smurf"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ExpressionRule(fde_start + code_factor, 0x500f5739,

                                       "orc"))

       .InSequence(s).WillOnce(Return(true));

   // Expectations are not wishes.

   EXPECT_CALL(handler, ExpressionRule(fde_start + 2 * code_factor, 0x500f5739,

                                       "smurf"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreValExpressionRuleUnchanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_val_expression).ULEB128(0x666ae152)

       .Block("hideous")

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   EXPECT_CALL(handler, ValExpressionRule(fde_start, 0x666ae152, "hideous"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreValExpressionRuleChanged) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_val_expression).ULEB128(0xb5ca5c46)

       .Block("revolting")

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0xb5ca5c46)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("RestoreValExpressionRuleChanged", section);

   EXPECT_CALL(handler, ValExpressionRule(fde_start, 0xb5ca5c46, "revolting"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0xb5ca5c46))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ValExpressionRule(fde_start + 2 * code_factor, 0xb5ca5c46,

                                       "revolting"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 TEST_F(CFIRestore, RestoreValExpressionRuleChangedValExpression) {

   CFISection section(kLittleEndian, 4);

   StockCIEAndFDE(&section);

   section

       .D8(dwarf2reader::DW_CFA_val_expression).ULEB128(0x500f5739)

       .Block("repulsive")

       .D8(dwarf2reader::DW_CFA_remember_state)

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_val_expression).ULEB128(0x500f5739)

       .Block("nauseous")

       .D8(dwarf2reader::DW_CFA_advance_loc | 1)

       .D8(dwarf2reader::DW_CFA_restore_state)

       .FinishEntry();

   PERHAPS_WRITE_DEBUG_FRAME_FILE("RestoreValExpressionRuleChangedValExpression",

                                  section);

   EXPECT_CALL(handler, ValExpressionRule(fde_start, 0x500f5739, "repulsive"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ValExpressionRule(fde_start + code_factor, 0x500f5739,

                                       "nauseous"))

       .InSequence(s).WillOnce(Return(true));

   // Expectations are not wishes.

   EXPECT_CALL(handler, ValExpressionRule(fde_start + 2 * code_factor, 0x500f5739,

                                       "repulsive"))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End()).WillOnce(Return(true));

   ParseSection(&section);

 }

 struct EHFrameFixture: public CFIInsnFixture {

   EHFrameFixture() 

       : CFIInsnFixture(), section(kBigEndian, 4, true) {

     encoded_pointer_bases.cfi  = 0x7f496cb2;

     encoded_pointer_bases.text = 0x540f67b6;

     encoded_pointer_bases.data = 0xe3eab768;

     section.SetEncodedPointerBases(encoded_pointer_bases);

   }

   CFISection section;

   CFISection::EncodedPointerBases encoded_pointer_bases;

   // Parse CFIInsnFixture::ParseSection, but parse the section as

   // .eh_frame data, supplying stock base addresses.

   void ParseEHFrameSection(CFISection *section, bool succeeds = true) {

     EXPECT_TRUE(section->ContainsEHFrame());

     string contents;

     EXPECT_TRUE(section->GetContents(&contents));

     dwarf2reader::Endianness endianness;

     if (section->endianness() == kBigEndian)

       endianness = ENDIANNESS_BIG;

     else {

       assert(section->endianness() == kLittleEndian);

       endianness = ENDIANNESS_LITTLE;

     }

     ByteReader byte_reader(endianness);

     byte_reader.SetAddressSize(section->AddressSize());

     byte_reader.SetCFIDataBase(encoded_pointer_bases.cfi, contents.data());

     byte_reader.SetTextBase(encoded_pointer_bases.text);

     byte_reader.SetDataBase(encoded_pointer_bases.data);

     CallFrameInfo parser(contents.data(), contents.size(),

                          &byte_reader, &handler, &reporter, true);

     if (succeeds)

       EXPECT_TRUE(parser.Start());

     else

       EXPECT_FALSE(parser.Start());

   }

 };

 class EHFrame: public EHFrameFixture, public Test { };

 // A simple CIE, an FDE, and a terminator.

 TEST_F(EHFrame, Terminator) {

   Label cie;

   section

       .Mark(&cie)

       .CIEHeader(9968, 2466, 67, 1, "")

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(3772).ULEB128(1372)

       .FinishEntry()

       .FDEHeader(cie, 0x848037a1, 0x7b30475e)

       .D8(dwarf2reader::DW_CFA_set_loc).D32(0x17713850)

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(5721)

       .FinishEntry()

       .D32(0)                           // Terminate the sequence.

       // This FDE should be ignored.

       .FDEHeader(cie, 0xf19629fe, 0x439fb09b)

       .FinishEntry();

   PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.Terminator", section);

   EXPECT_CALL(handler, Entry(_, 0x848037a1, 0x7b30475e, 1, "", 67))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ValOffsetRule(0x848037a1, kCFARegister, 3772, 1372))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, UndefinedRule(0x17713850, 5721))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End())

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(reporter, EarlyEHTerminator(_))

       .InSequence(s).WillOnce(Return());

   ParseEHFrameSection(&section);

 }

 // The parser should recognize the Linux Standards Base 'z' augmentations.

 TEST_F(EHFrame, SimpleFDE) {

   DwarfPointerEncoding lsda_encoding =

       DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect

                            | dwarf2reader::DW_EH_PE_datarel

                            | dwarf2reader::DW_EH_PE_sdata2);

   DwarfPointerEncoding fde_encoding =

       DwarfPointerEncoding(dwarf2reader::DW_EH_PE_textrel

                            | dwarf2reader::DW_EH_PE_udata2);

   section.SetPointerEncoding(fde_encoding);

   section.SetEncodedPointerBases(encoded_pointer_bases);

   Label cie;

   section

       .Mark(&cie)

       .CIEHeader(4873, 7012, 100, 1, "zSLPR")

       .ULEB128(7)                                // Augmentation data length

       .D8(lsda_encoding)                         // LSDA pointer format

       .D8(dwarf2reader::DW_EH_PE_pcrel)          // personality pointer format

       .EncodedPointer(0x97baa00, dwarf2reader::DW_EH_PE_pcrel) // and value 

       .D8(fde_encoding)                          // FDE pointer format

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(6706).ULEB128(31)

       .FinishEntry()

       .FDEHeader(cie, 0x540f6b56, 0xf686)

       .ULEB128(2)                                // Augmentation data length

       .EncodedPointer(0xe3eab475, lsda_encoding) // LSDA pointer, signed

       .D8(dwarf2reader::DW_CFA_set_loc)

       .EncodedPointer(0x540fa4ce, fde_encoding)

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x675e)

       .FinishEntry()

       .D32(0);                                   // terminator

   PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.SimpleFDE", section);

   EXPECT_CALL(handler, Entry(_, 0x540f6b56, 0xf686, 1, "zSLPR", 100))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, PersonalityRoutine(0x97baa00, false))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, LanguageSpecificDataArea(0xe3eab475, true))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, SignalHandler())

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ValOffsetRule(0x540f6b56, kCFARegister, 6706, 31))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, UndefinedRule(0x540fa4ce, 0x675e))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End())

       .InSequence(s).WillOnce(Return(true));

   ParseEHFrameSection(&section);

 }

 // Check that we can handle an empty 'z' augmentation.

 TEST_F(EHFrame, EmptyZ) {

   Label cie;

   section

       .Mark(&cie)

       .CIEHeader(5955, 5805, 228, 1, "z")

       .ULEB128(0)                                // Augmentation data length

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(3629).ULEB128(247)

       .FinishEntry()

       .FDEHeader(cie, 0xda007738, 0xfb55c641)

       .ULEB128(0)                                // Augmentation data length

       .D8(dwarf2reader::DW_CFA_advance_loc1).D8(11)

       .D8(dwarf2reader::DW_CFA_undefined).ULEB128(3769)

       .FinishEntry();

   PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.EmptyZ", section);

   EXPECT_CALL(handler, Entry(_, 0xda007738, 0xfb55c641, 1, "z", 228))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, ValOffsetRule(0xda007738, kCFARegister, 3629, 247))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, UndefinedRule(0xda007738 + 11 * 5955, 3769))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End())

       .InSequence(s).WillOnce(Return(true));

   ParseEHFrameSection(&section);

 }

 // Check that we recognize bad 'z' augmentation characters.

 TEST_F(EHFrame, BadZ) {

   Label cie;

   section

       .Mark(&cie)

       .CIEHeader(6937, 1045, 142, 1, "zQ")

       .ULEB128(0)                                // Augmentation data length

       .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(9006).ULEB128(7725)

       .FinishEntry()

       .FDEHeader(cie, 0x1293efa8, 0x236f53f2)

       .ULEB128(0)                                // Augmentation data length

       .D8(dwarf2reader::DW_CFA_advance_loc | 12)

       .D8(dwarf2reader::DW_CFA_register).ULEB128(5667).ULEB128(3462)

       .FinishEntry();

   PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.BadZ", section);

   EXPECT_CALL(reporter, UnrecognizedAugmentation(_, "zQ"))

       .WillOnce(Return());

   ParseEHFrameSection(&section, false);

 }

 TEST_F(EHFrame, zL) {

   Label cie;

   DwarfPointerEncoding lsda_encoding =

       DwarfPointerEncoding(dwarf2reader::DW_EH_PE_funcrel

                            | dwarf2reader::DW_EH_PE_udata2);

   section

       .Mark(&cie)

       .CIEHeader(9285, 9959, 54, 1, "zL")

       .ULEB128(1)                       // Augmentation data length

       .D8(lsda_encoding)                // encoding for LSDA pointer in FDE

       .FinishEntry()

       .FDEHeader(cie, 0xd40091aa, 0x9aa6e746)

       .ULEB128(2)                       // Augmentation data length

       .EncodedPointer(0xd40099cd, lsda_encoding) // LSDA pointer

       .FinishEntry()

       .D32(0);                                   // terminator

   PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.zL", section);

   EXPECT_CALL(handler, Entry(_, 0xd40091aa, 0x9aa6e746, 1, "zL", 54))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, LanguageSpecificDataArea(0xd40099cd, false))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End())

       .InSequence(s).WillOnce(Return(true));

   ParseEHFrameSection(&section);

 }

 TEST_F(EHFrame, zP) {

   Label cie;

   DwarfPointerEncoding personality_encoding =

       DwarfPointerEncoding(dwarf2reader::DW_EH_PE_datarel

                            | dwarf2reader::DW_EH_PE_udata2);

   section

       .Mark(&cie)

       .CIEHeader(1097, 6313, 17, 1, "zP")

       .ULEB128(3)                  // Augmentation data length

       .D8(personality_encoding)    // encoding for personality routine

       .EncodedPointer(0xe3eaccac, personality_encoding) // value

       .FinishEntry()

       .FDEHeader(cie, 0x0c8350c9, 0xbef11087)

       .ULEB128(0)                       // Augmentation data length

       .FinishEntry()

       .D32(0);                                   // terminator

   PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.zP", section);

   EXPECT_CALL(handler, Entry(_, 0x0c8350c9, 0xbef11087, 1, "zP", 17))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, PersonalityRoutine(0xe3eaccac, false))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End())

       .InSequence(s).WillOnce(Return(true));

   ParseEHFrameSection(&section);

 }

 TEST_F(EHFrame, zR) {

   Label cie;

   DwarfPointerEncoding pointer_encoding =

       DwarfPointerEncoding(dwarf2reader::DW_EH_PE_textrel

                            | dwarf2reader::DW_EH_PE_sdata2);

   section.SetPointerEncoding(pointer_encoding);

   section

       .Mark(&cie)

       .CIEHeader(8011, 5496, 75, 1, "zR")

       .ULEB128(1)                       // Augmentation data length

       .D8(pointer_encoding)             // encoding for FDE addresses

       .FinishEntry()

       .FDEHeader(cie, 0x540f9431, 0xbd0)

       .ULEB128(0)                       // Augmentation data length

       .FinishEntry()

       .D32(0);                          // terminator

   PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.zR", section);

   EXPECT_CALL(handler, Entry(_, 0x540f9431, 0xbd0, 1, "zR", 75))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End())

       .InSequence(s).WillOnce(Return(true));

   ParseEHFrameSection(&section);

 }

 TEST_F(EHFrame, zS) {

   Label cie;

   section

       .Mark(&cie)

       .CIEHeader(9217, 7694, 57, 1, "zS")

       .ULEB128(0)                                // Augmentation data length

       .FinishEntry()

       .FDEHeader(cie, 0xd40091aa, 0x9aa6e746)

       .ULEB128(0)                                // Augmentation data length

       .FinishEntry()

       .D32(0);                                   // terminator

   PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.zS", section);

   EXPECT_CALL(handler, Entry(_, 0xd40091aa, 0x9aa6e746, 1, "zS", 57))

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, SignalHandler())

       .InSequence(s).WillOnce(Return(true));

   EXPECT_CALL(handler, End())

       .InSequence(s).WillOnce(Return(true));

   ParseEHFrameSection(&section);

 }

 // These tests require manual inspection of the test output.

 struct CFIReporterFixture {

   CFIReporterFixture() : reporter("test file name", "test section name") { }

   CallFrameInfo::Reporter reporter;

 };

 class CFIReporter: public CFIReporterFixture, public Test { };

 TEST_F(CFIReporter, Incomplete) {

   reporter.Incomplete(0x0102030405060708ULL, CallFrameInfo::kUnknown);

 }

 TEST_F(CFIReporter, EarlyEHTerminator) {

   reporter.EarlyEHTerminator(0x0102030405060708ULL);

 }

 TEST_F(CFIReporter, CIEPointerOutOfRange) {

   reporter.CIEPointerOutOfRange(0x0123456789abcdefULL, 0xfedcba9876543210ULL);

 }

 TEST_F(CFIReporter, BadCIEId) {

   reporter.BadCIEId(0x0123456789abcdefULL, 0xfedcba9876543210ULL);

 }

 TEST_F(CFIReporter, UnrecognizedVersion) {

   reporter.UnrecognizedVersion(0x0123456789abcdefULL, 43);

 }

 TEST_F(CFIReporter, UnrecognizedAugmentation) {

   reporter.UnrecognizedAugmentation(0x0123456789abcdefULL, "poodles");

 }

 TEST_F(CFIReporter, InvalidPointerEncoding) {

   reporter.InvalidPointerEncoding(0x0123456789abcdefULL, 0x42);

 }

 TEST_F(CFIReporter, UnusablePointerEncoding) {

   reporter.UnusablePointerEncoding(0x0123456789abcdefULL, 0x42);

 }

 TEST_F(CFIReporter, RestoreInCIE) {

   reporter.RestoreInCIE(0x0123456789abcdefULL, 0xfedcba9876543210ULL);

 }

 TEST_F(CFIReporter, BadInstruction) {

   reporter.BadInstruction(0x0123456789abcdefULL, CallFrameInfo::kFDE,

                           0xfedcba9876543210ULL);

 }

 TEST_F(CFIReporter, NoCFARule) {

   reporter.NoCFARule(0x0123456789abcdefULL, CallFrameInfo::kCIE,

                      0xfedcba9876543210ULL);

 }

 TEST_F(CFIReporter, EmptyStateStack) {

   reporter.EmptyStateStack(0x0123456789abcdefULL, CallFrameInfo::kTerminator,

                            0xfedcba9876543210ULL);

 }

 TEST_F(CFIReporter, ClearingCFARule) {

   reporter.ClearingCFARule(0x0123456789abcdefULL, CallFrameInfo::kFDE,

                            0xfedcba9876543210ULL);

 }

 #ifdef WRITE_ELF

 // See comments at the top of the file mentioning WRITE_ELF for details.

 using google_breakpad::test_assembler::Section;

 struct ELFSectionHeader {

   ELFSectionHeader(unsigned int set_type)

       : type(set_type), flags(0), address(0), link(0), info(0),

         alignment(1), entry_size(0) { }

   Label name;

   unsigned int type;

   uint64_t flags;

   uint64_t address;

   Label file_offset;

   Label file_size;

   unsigned int link;

   unsigned int info;

   uint64_t alignment;

   uint64_t entry_size;

 };

 void AppendSectionHeader(CFISection *table, const ELFSectionHeader &header) {

   (*table)

       .D32(header.name)                   // name, index in string tbl

       .D32(header.type)                   // type

       .Address(header.flags)              // flags

       .Address(header.address)            // address in memory

       .Address(header.file_offset)        // offset in ELF file

       .Address(header.file_size)          // length in bytes

       .D32(header.link)                   // link to related section

       .D32(header.info)                   // miscellaneous

       .Address(header.alignment)          // alignment

       .Address(header.entry_size);        // entry size

 }

 void WriteELFFrameSection(const char *filename, const char *cfi_name,

                           const CFISection &cfi) {

   int elf_class = cfi.AddressSize() == 4 ? ELFCLASS32 : ELFCLASS64;

   int elf_data = (cfi.endianness() == kBigEndian

                   ? ELFDATA2MSB : ELFDATA2LSB);

   CFISection elf(cfi.endianness(), cfi.AddressSize());

   Label elf_header_size, section_table_offset;

   elf

       .Append("\x7f" "ELF")

       .D8(elf_class)              // 32-bit or 64-bit ELF

       .D8(elf_data)               // endianness

       .D8(1)                      // ELF version

       .D8(ELFOSABI_LINUX)         // Operating System/ABI indication

       .D8(0)                      // ABI version

       .Append(7, 0xda)            // padding

       .D16(ET_EXEC)               // file type: executable file

       .D16(EM_386)                // architecture: Intel IA-32

       .D32(EV_CURRENT);           // ELF version

   elf

       .Address(0x0123456789abcdefULL) // program entry point

       .Address(0)                 // program header offset

       .Address(section_table_offset) // section header offset

       .D32(0)                     // processor-specific flags

       .D16(elf_header_size)       // ELF header size in bytes */

       .D16(elf_class == ELFCLASS32 ? 32 : 56) // program header entry size

       .D16(0)                     // program header table entry count

       .D16(elf_class == ELFCLASS32 ? 40 : 64) // section header entry size

       .D16(3)                     // section  count

       .D16(1)                     // section name string table

       .Mark(&elf_header_size);

   // The null section. Every ELF file has one, as the first entry in

   // the section header table.

   ELFSectionHeader null_header(SHT_NULL);

   null_header.file_offset = 0;

   null_header.file_size = 0;

   // The CFI section. The whole reason for writing out this ELF file

   // is to put this in it so that we can run other dumping programs on

   // it to check its contents.

   ELFSectionHeader cfi_header(SHT_PROGBITS);

   cfi_header.file_size = cfi.Size();

   // The section holding the names of the sections. This is the

   // section whose index appears in the e_shstrndx member of the ELF

   // header.

   ELFSectionHeader section_names_header(SHT_STRTAB);

   CFISection section_names(cfi.endianness(), cfi.AddressSize());

   section_names

       .Mark(&null_header.name)

       .AppendCString("")

       .Mark(&section_names_header.name)

       .AppendCString(".shstrtab")

       .Mark(&cfi_header.name)

       .AppendCString(cfi_name)

       .Mark(&section_names_header.file_size);

   // Create the section table. The ELF header's e_shoff member refers

   // to this, and the e_shnum member gives the number of entries it

   // contains.

   CFISection section_table(cfi.endianness(), cfi.AddressSize());

   AppendSectionHeader(&section_table, null_header);

   AppendSectionHeader(&section_table, section_names_header);

   AppendSectionHeader(&section_table, cfi_header);

   // Append the section table and the section contents to the ELF file.

   elf

       .Mark(&section_table_offset)

       .Append(section_table)

       .Mark(&section_names_header.file_offset)

       .Append(section_names)

       .Mark(&cfi_header.file_offset)

       .Append(cfi);

   string contents;

   if (!elf.GetContents(&contents)) {

     fprintf(stderr, "failed to get ELF file contents\n");

     exit(1);

   }

   FILE *out = fopen(filename, "w");

   if (!out) {

     fprintf(stderr, "error opening ELF file '%s': %s\n",

             filename, strerror(errno));

     exit(1);

   }

   if (fwrite(contents.data(), 1, contents.size(), out) != contents.size()) {

     fprintf(stderr, "error writing ELF data to '%s': %s\n",

             filename, strerror(errno));

     exit(1);

   }

   if (fclose(out) == EOF) {

     fprintf(stderr, "error closing ELF file '%s': %s\n",

             filename, strerror(errno));

     exit(1);

   }

 }

 #endif