The Tor Browser: comparison toolkit/crashreporter/google-breakpad/src/common/dwarf/dwarf2reader_cfi

--1:000000000000
+:ba7b2bd91212
+// 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

The Tor Browser / file comparison

comparison: toolkit/crashreporter/google-breakpad/src/common/dwarf/dwarf2reader_cfi_unittest.cc

toolkit/crashreporter/google-breakpad/src/common/dwarf/dwarf2reader_cfi_unittest.cc