/*
* Copyright ( C ) 2015 The Android Open Source Project
*
* Licensed under the Apache License , Version 2 . 0 ( the " License " ) ;
* you may not use this file except in compliance with the License .
* You may obtain a copy of the License at
*
* http : //www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing , software
* distributed under the License is distributed on an " AS IS " BASIS ,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND , either express or implied .
* See the License for the specific language governing permissions and
* limitations under the License .
*/
#include "dwarf_test.h"
#include "dwarf/debug_frame_opcode_writer.h"
#include "dwarf/debug_info_entry_writer.h"
#include "dwarf/debug_line_opcode_writer.h"
#include "dwarf/dwarf_constants.h"
#include "dwarf/headers.h"
#include "gtest/gtest.h"
namespace art HIDDEN {
namespace dwarf {
// Run the tests only on host since we need objdump.
#ifndef ART_TARGET_ANDROID
TEST_F(DwarfTest, DebugFrame) {
const InstructionSet isa = InstructionSet::kX86;
const bool is64bit = Is64BitInstructionSet(isa);
// Pick offset value which would catch Uleb vs Sleb errors.
const int offset = 40000 ;
ASSERT_EQ(UnsignedLeb128Size(offset / 4 ), 2 u);
ASSERT_EQ(SignedLeb128Size(offset / 4 ), 3 u);
const Reg reg(6 );
// Test the opcodes in the order mentioned in the spec.
// There are usually several encoding variations of each opcode.
DebugFrameOpCodeWriter<> opcodes;
DW_CHECK(".debug_frame contents:" );
DW_CHECK("FDE" );
DW_CHECK_NEXT("DWARF32" );
int pc = 0 ;
for (int i : {0 , 1 , 0 x3F, 0 x40, 0 xFF, 0 x100, 0 xFFFF, 0 x10000}) {
pc += i;
opcodes.AdvancePC(pc);
}
DW_CHECK_NEXT("DW_CFA_advance_loc: 1" );
DW_CHECK_NEXT("DW_CFA_advance_loc: 63" );
DW_CHECK_NEXT("DW_CFA_advance_loc1: 64" );
DW_CHECK_NEXT("DW_CFA_advance_loc1: 255" );
DW_CHECK_NEXT("DW_CFA_advance_loc2: 256" );
DW_CHECK_NEXT("DW_CFA_advance_loc2: 65535" );
DW_CHECK_NEXT("DW_CFA_advance_loc4: 65536" );
opcodes.DefCFA(reg, offset);
DW_CHECK_NEXT("DW_CFA_def_cfa: ESI +40000" );
opcodes.DefCFA(reg, -offset);
DW_CHECK_NEXT("DW_CFA_def_cfa_sf: ESI -40000" );
opcodes.DefCFARegister(reg);
DW_CHECK_NEXT("DW_CFA_def_cfa_register: ESI" );
opcodes.DefCFAOffset(offset);
DW_CHECK_NEXT("DW_CFA_def_cfa_offset: +40000" );
opcodes.DefCFAOffset(-offset);
DW_CHECK_NEXT("DW_CFA_def_cfa_offset_sf: -40000" );
uint8_t expr[] = { /*nop*/ 0x96 };
opcodes.DefCFAExpression(expr, arraysize(expr));
DW_CHECK_NEXT("DW_CFA_def_cfa_expression: DW_OP_nop" );
opcodes.Undefined(reg);
DW_CHECK_NEXT("DW_CFA_undefined: ESI" );
opcodes.SameValue(reg);
DW_CHECK_NEXT("DW_CFA_same_value: ESI" );
opcodes.Offset(Reg(0 x3F), -offset);
DW_CHECK_NEXT("DW_CFA_offset: reg63 -40000" );
opcodes.Offset(Reg(0 x40), -offset);
DW_CHECK_NEXT("DW_CFA_offset_extended: reg64 -40000" );
opcodes.Offset(Reg(0 x40), offset);
DW_CHECK_NEXT("DW_CFA_offset_extended_sf: reg64 40000" );
opcodes.ValOffset(reg, -offset);
DW_CHECK_NEXT("DW_CFA_val_offset: ESI -40000" );
opcodes.ValOffset(reg, offset);
DW_CHECK_NEXT("DW_CFA_val_offset_sf: ESI 40000" );
opcodes.Register (reg, Reg(1 ));
DW_CHECK_NEXT("DW_CFA_register: ESI ECX" );
opcodes.Expression(reg, expr, arraysize(expr));
DW_CHECK_NEXT("DW_CFA_expression: ESI DW_OP_nop" );
opcodes.ValExpression(reg, expr, arraysize(expr));
DW_CHECK_NEXT("DW_CFA_val_expression: ESI DW_OP_nop" );
opcodes.Restore(Reg(0 x3F));
DW_CHECK_NEXT("DW_CFA_restore: reg63" );
opcodes.Restore(Reg(0 x40));
DW_CHECK_NEXT("DW_CFA_restore_extended: reg64" );
opcodes.Restore(reg);
DW_CHECK_NEXT("DW_CFA_restore: ESI" );
opcodes.RememberState();
DW_CHECK_NEXT("DW_CFA_remember_state:" );
opcodes.RestoreState();
DW_CHECK_NEXT("DW_CFA_restore_state:" );
opcodes.Nop();
DW_CHECK_NEXT("DW_CFA_nop:" );
// Also test helpers.
opcodes.DefCFA(Reg(4 ), 100 ); // ESP
DW_CHECK_NEXT("DW_CFA_def_cfa: ESP +100" );
opcodes.AdjustCFAOffset(8 );
DW_CHECK_NEXT("DW_CFA_def_cfa_offset: +108" );
opcodes.RelOffset(Reg(0 ), 0 ); // push R0
DW_CHECK_NEXT("DW_CFA_offset: EAX -108" );
opcodes.RelOffset(Reg(1 ), 4 ); // push R1
DW_CHECK_NEXT("DW_CFA_offset: ECX -104" );
opcodes.RelOffsetForMany(Reg(2 ), 8 , 1 | (1 << 3 ), 4 ); // push R2 and R5
DW_CHECK_NEXT("DW_CFA_offset: EDX -100" );
DW_CHECK_NEXT("DW_CFA_offset: EBP -96" );
opcodes.RestoreMany(Reg(2 ), 1 | (1 << 3 )); // pop R2 and R5
DW_CHECK_NEXT("DW_CFA_restore: EDX" );
DW_CHECK_NEXT("DW_CFA_restore: EBP" );
DebugFrameOpCodeWriter<> initial_opcodes;
WriteCIE(is64bit, Reg(is64bit ? 16 : 8 ), initial_opcodes, &debug_frame_data_);
WriteFDE(is64bit,
/* cie_pointer= */ 0,
0 x01000000,
0 x01000000,
ArrayRef<const uint8_t>(*opcodes.data()),
&debug_frame_data_);
CheckObjdumpOutput(isa, "-debug-frame" );
}
TEST_F(DwarfTest, DISABLED_DebugFrame64) {
const InstructionSet isa = InstructionSet::kX86_64;
const bool is64bit = Is64BitInstructionSet(isa);
DebugFrameOpCodeWriter<> initial_opcodes;
WriteCIE(is64bit, Reg(16 ), initial_opcodes, &debug_frame_data_);
DebugFrameOpCodeWriter<> opcodes;
DW_CHECK(".debug_frame contents:" );
WriteFDE(is64bit,
/* cie_pointer= */ 0,
0 x0100000000000000,
0 x0200000000000000,
ArrayRef<const uint8_t>(*opcodes.data()),
&debug_frame_data_);
DW_CHECK("FDE cie=00000000 pc=100000000000000..300000000000000" );
CheckObjdumpOutput(isa, "-debug-frame" );
}
// Test x86_64 register mapping. It is the only non-trivial architecture.
// ARM and X86 have: dwarf_reg = art_reg + constant.
TEST_F(DwarfTest, x86_64_RegisterMapping) {
const InstructionSet isa = InstructionSet::kX86_64;
const bool is64bit = Is64BitInstructionSet(isa);
DebugFrameOpCodeWriter<> opcodes;
DW_CHECK(".debug_frame contents:" );
for (int i = 0 ; i < 16 ; i++) {
opcodes.RelOffset(Reg::X86_64Core(i), 0 );
}
DW_CHECK("FDE" );
DW_CHECK_NEXT("DWARF32" );
DW_CHECK_NEXT("DW_CFA_offset: RAX 0" );
DW_CHECK_NEXT("DW_CFA_offset: RCX 0" );
DW_CHECK_NEXT("DW_CFA_offset: RDX 0" );
DW_CHECK_NEXT("DW_CFA_offset: RBX 0" );
DW_CHECK_NEXT("DW_CFA_offset: RSP 0" );
DW_CHECK_NEXT("DW_CFA_offset: RBP 0" );
DW_CHECK_NEXT("DW_CFA_offset: RSI 0" );
DW_CHECK_NEXT("DW_CFA_offset: RDI 0" );
DW_CHECK_NEXT("DW_CFA_offset: R8 0" );
DW_CHECK_NEXT("DW_CFA_offset: R9 0" );
DW_CHECK_NEXT("DW_CFA_offset: R10 0" );
DW_CHECK_NEXT("DW_CFA_offset: R11 0" );
DW_CHECK_NEXT("DW_CFA_offset: R12 0" );
DW_CHECK_NEXT("DW_CFA_offset: R13 0" );
DW_CHECK_NEXT("DW_CFA_offset: R14 0" );
DW_CHECK_NEXT("DW_CFA_offset: R15 0" );
DebugFrameOpCodeWriter<> initial_opcodes;
WriteCIE(is64bit, Reg(16 ), initial_opcodes, &debug_frame_data_);
WriteFDE(is64bit,
/* cie_pointer= */ 0,
0 x0100000000000000,
0 x0200000000000000,
ArrayRef<const uint8_t>(*opcodes.data()),
&debug_frame_data_);
CheckObjdumpOutput(isa, "-debug-frame" );
}
TEST_F(DwarfTest, DebugLine) {
const InstructionSet isa = InstructionSet::kX86;
const bool is64bit = Is64BitInstructionSet(isa);
const int code_factor_bits = 1 ;
DebugLineOpCodeWriter<> opcodes(is64bit, code_factor_bits);
DW_CHECK(".debug_line contents:" );
std::vector<std::string> include_directories;
include_directories.push_back("/path/to/source" );
DW_CHECK("include_directories[ 1] = \" /path/to/source\"" );
std::vector<FileEntry> files {
{ "file0.c" , 0 , 1000 , 2000 },
{ "file1.c" , 1 , 1000 , 2000 },
{ "file2.c" , 1 , 1000 , 2000 },
};
DW_CHECK_NEXT("file_names[ 1]:" );
DW_CHECK_NEXT(" name: \" file0.c\"" );
DW_CHECK_NEXT(" dir_index: 0" );
DW_CHECK_NEXT(" mod_time: 0x000003e8" );
DW_CHECK_NEXT(" length: 0x000007d0" );
DW_CHECK_NEXT("file_names[ 2]:" );
DW_CHECK_NEXT(" name: \" file1.c\"" );
DW_CHECK_NEXT(" dir_index: 1" );
DW_CHECK_NEXT(" mod_time: 0x000003e8" );
DW_CHECK_NEXT(" length: 0x000007d0" );
DW_CHECK_NEXT("file_names[ 3]:" );
DW_CHECK_NEXT(" name: \" file2.c\"" );
DW_CHECK_NEXT(" dir_index: 1" );
DW_CHECK_NEXT(" mod_time: 0x000003e8" );
DW_CHECK_NEXT(" length: 0x000007d0" );
opcodes.SetAddress(0 x01000000);
opcodes.SetIsStmt(true );
opcodes.AddRow();
opcodes.AdvancePC(0 x01000100);
opcodes.SetFile(2 );
opcodes.AdvanceLine(3 );
opcodes.SetColumn(4 );
opcodes.SetIsStmt(false );
opcodes.SetBasicBlock();
opcodes.SetPrologueEnd();
opcodes.SetEpilogueBegin();
opcodes.SetISA(5 );
opcodes.EndSequence();
opcodes.DefineFile("file.c" , 0 , 1000 , 2000 );
DW_CHECK_NEXT("Address Line Column File ISA Discriminator OpIndex Flags" );
DW_CHECK_NEXT("------------------ ------ ------ ------ --- ------------- ------- -------------" );
DW_CHECK_NEXT("0x0000000001000000 1 0 1 0 0 0 is_stmt" );
DW_CHECK_NEXT("0x0000000001000100 3 4 2 5 0 0 basic_block prologue_end epilogue_begin end_sequence" );
WriteDebugLineTable(include_directories, files, opcodes, &debug_line_data_);
CheckObjdumpOutput(isa, "-debug-line" );
}
// DWARF has special one byte codes which advance PC and line at the same time.
TEST_F(DwarfTest, DebugLineSpecialOpcodes) {
const InstructionSet isa = InstructionSet::kX86;
const bool is64bit = Is64BitInstructionSet(isa);
const int code_factor_bits = 1 ;
uint32_t pc = 0 x01000000;
int line = 1 ;
DebugLineOpCodeWriter<> opcodes(is64bit, code_factor_bits);
opcodes.SetAddress(pc);
size_t num_rows = 0 ;
DW_CHECK(".debug_line contents:" );
DW_CHECK("file_names[ 1]:" );
DW_CHECK(" name: \" file.c\"" );
DW_CHECK("Address Line Column File ISA Discriminator OpIndex Flags" );
DW_CHECK("------------------ ------ ------ ------ --- ------------- ------- -------------" );
for (int addr_delta = 0 ; addr_delta < 80 ; addr_delta += 2 ) {
for (int line_delta = 16 ; line_delta >= -16 ; --line_delta) {
pc += addr_delta;
line += line_delta;
opcodes.AddRow(pc, line);
num_rows++;
ASSERT_EQ(opcodes.CurrentAddress(), pc);
ASSERT_EQ(opcodes.CurrentLine(), line);
char expected[1024 ];
sprintf(expected, "0x%016x %6i 0 1 0 0 0" , pc, line);
DW_CHECK_NEXT(expected);
}
}
opcodes.EndSequence();
EXPECT_LT(opcodes.data()->size(), num_rows * 3 );
std::vector<std::string> directories;
std::vector<FileEntry> files = { { "file.c" , 0 , 1000 , 2000 } };
WriteDebugLineTable(directories, files, opcodes, &debug_line_data_);
CheckObjdumpOutput(isa, "-debug-line" );
}
TEST_F(DwarfTest, DebugInfo) {
const InstructionSet isa = InstructionSet::kX86;
const bool is64bit = Is64BitInstructionSet(isa);
DebugAbbrevWriter<> debug_abbrev(&debug_abbrev_data_);
DW_CHECK(".debug_abbrev contents:" );
DW_CHECK_NEXT("Abbrev table for offset: 0x00000000" );
DW_CHECK_NEXT("[1] DW_TAG_compile_unit DW_CHILDREN_yes" );
DW_CHECK_NEXT(" DW_AT_producer DW_FORM_strp" );
DW_CHECK_NEXT(" DW_AT_low_pc DW_FORM_addr" );
DW_CHECK_NEXT(" DW_AT_high_pc DW_FORM_addr" );
DW_CHECK_NEXT("[2] DW_TAG_subprogram DW_CHILDREN_no" );
DW_CHECK_NEXT(" DW_AT_name DW_FORM_strp" );
DW_CHECK_NEXT(" DW_AT_low_pc DW_FORM_addr" );
DW_CHECK_NEXT(" DW_AT_high_pc DW_FORM_addr" );
DW_CHECK_NEXT("[3] DW_TAG_compile_unit DW_CHILDREN_no" );
DebugInfoEntryWriter<> info(is64bit, &debug_abbrev);
DW_CHECK(".debug_info contents:" );
info.StartTag(dwarf::DW_TAG_compile_unit);
DW_CHECK_NEXT("Compile Unit: length = 0x00000030, format = DWARF32, version = 0x0004, abbr_offset = 0x0000, addr_size = 0x04" );
DW_CHECK_NEXT("DW_TAG_compile_unit" );
info.WriteStrp(dwarf::DW_AT_producer, "Compiler name" , &debug_str_data_);
DW_CHECK_NEXT(" DW_AT_producer (\" Compiler name\")" );
info.WriteAddr(dwarf::DW_AT_low_pc, 0 x01000000);
DW_CHECK_NEXT(" DW_AT_low_pc (0x01000000)" );
info.WriteAddr(dwarf::DW_AT_high_pc, 0 x02000000);
DW_CHECK_NEXT(" DW_AT_high_pc (0x02000000)" );
info.StartTag(dwarf::DW_TAG_subprogram);
DW_CHECK_NEXT(" DW_TAG_subprogram" );
info.WriteStrp(dwarf::DW_AT_name, "Foo" , &debug_str_data_);
DW_CHECK_NEXT(" DW_AT_name (\" Foo\")" );
info.WriteAddr(dwarf::DW_AT_low_pc, 0 x01010000);
DW_CHECK_NEXT(" DW_AT_low_pc (0x01010000)" );
info.WriteAddr(dwarf::DW_AT_high_pc, 0 x01020000);
DW_CHECK_NEXT(" DW_AT_high_pc (0x01020000)" );
info.EndTag(); // DW_TAG_subprogram
info.StartTag(dwarf::DW_TAG_subprogram);
DW_CHECK_NEXT(" DW_TAG_subprogram" );
info.WriteStrp(dwarf::DW_AT_name, "Bar" , &debug_str_data_);
DW_CHECK_NEXT(" DW_AT_name (\" Bar\")" );
info.WriteAddr(dwarf::DW_AT_low_pc, 0 x01020000);
DW_CHECK_NEXT(" DW_AT_low_pc (0x01020000)" );
info.WriteAddr(dwarf::DW_AT_high_pc, 0 x01030000);
DW_CHECK_NEXT(" DW_AT_high_pc (0x01030000)" );
info.EndTag(); // DW_TAG_subprogram
info.EndTag(); // DW_TAG_compile_unit
DW_CHECK_NEXT(" NULL" );
// Test that previous list was properly terminated and empty children.
info.StartTag(dwarf::DW_TAG_compile_unit);
info.EndTag(); // DW_TAG_compile_unit
dwarf::WriteDebugInfoCU(/* debug_abbrev_offset= */ 0, info, &debug_info_data_);
CheckObjdumpOutput(isa, "-debug-info -debug-abbrev" );
}
#endif // ART_TARGET_ANDROID
} // namespace dwarf
} // namespace art
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