mozilla-central/toolkit/crashreporter/google-breakpad/src/common/dwarf_cfi_to_module.cc

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// -*- mode: c++ -*-
// 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>
// Implementation of google_breakpad::DwarfCFIToModule.
// See dwarf_cfi_to_module.h for details.
#include <sstream>
#include "common/dwarf_cfi_to_module.h"
namespace google_breakpad {
using std::ostringstream;
vector<string> DwarfCFIToModule::RegisterNames::MakeVector(
const char * const *strings,
size_t size) {
vector<string> names(strings, strings + size);
return names;
}
vector<string> DwarfCFIToModule::RegisterNames::I386() {
static const char *const names[] = {
"$eax", "$ecx", "$edx", "$ebx", "$esp", "$ebp", "$esi", "$edi",
"$eip", "$eflags", "$unused1",
"$st0", "$st1", "$st2", "$st3", "$st4", "$st5", "$st6", "$st7",
"$unused2", "$unused3",
"$xmm0", "$xmm1", "$xmm2", "$xmm3", "$xmm4", "$xmm5", "$xmm6", "$xmm7",
"$mm0", "$mm1", "$mm2", "$mm3", "$mm4", "$mm5", "$mm6", "$mm7",
"$fcw", "$fsw", "$mxcsr",
"$es", "$cs", "$ss", "$ds", "$fs", "$gs", "$unused4", "$unused5",
"$tr", "$ldtr"
};
return MakeVector(names, sizeof(names) / sizeof(names[0]));
}
vector<string> DwarfCFIToModule::RegisterNames::X86_64() {
static const char *const names[] = {
"$rax", "$rdx", "$rcx", "$rbx", "$rsi", "$rdi", "$rbp", "$rsp",
"$r8", "$r9", "$r10", "$r11", "$r12", "$r13", "$r14", "$r15",
"$rip",
"$xmm0","$xmm1","$xmm2", "$xmm3", "$xmm4", "$xmm5", "$xmm6", "$xmm7",
"$xmm8","$xmm9","$xmm10","$xmm11","$xmm12","$xmm13","$xmm14","$xmm15",
"$st0", "$st1", "$st2", "$st3", "$st4", "$st5", "$st6", "$st7",
"$mm0", "$mm1", "$mm2", "$mm3", "$mm4", "$mm5", "$mm6", "$mm7",
"$rflags",
"$es", "$cs", "$ss", "$ds", "$fs", "$gs", "$unused1", "$unused2",
"$fs.base", "$gs.base", "$unused3", "$unused4",
"$tr", "$ldtr",
"$mxcsr", "$fcw", "$fsw"
};
return MakeVector(names, sizeof(names) / sizeof(names[0]));
}
// Per ARM IHI 0040A, section 3.1
vector<string> DwarfCFIToModule::RegisterNames::ARM() {
static const char *const names[] = {
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11", "r12", "sp", "lr", "pc",
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
"fps", "cpsr", "", "", "", "", "", "",
"", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "",
"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
"s8", "s9", "s10", "s11", "s12", "s13", "s14", "s15",
"s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23",
"s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31",
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7"
};
return MakeVector(names, sizeof(names) / sizeof(names[0]));
}
// Per ARM IHI 0057A, section 3.1
vector<string> DwarfCFIToModule::RegisterNames::ARM64() {
static const char *const names[] = {
"x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
"x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
"x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23",
"x24", "x25", "x26", "x27", "x28", "x29", "x30", "sp",
"", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "",
"v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7",
"v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15",
"v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23",
"v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31"
};
return MakeVector(names, sizeof(names) / sizeof(names[0]));
}
vector<string> DwarfCFIToModule::RegisterNames::MIPS() {
static const char* const kRegisterNames[] = {
"$zero", "$at", "$v0", "$v1", "$a0", "$a1", "$a2", "$a3",
"$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
"$s0", "$s1", "$s2", "$s3", "$s4", "$s5", "$s6", "$s7",
"$t8", "$t9", "$k0", "$k1", "$gp", "$sp", "$fp", "$ra",
"$lo", "$hi", "$pc", "$f0", "$f2", "$f3", "$f4", "$f5",
"$f6", "$f7", "$f8", "$f9", "$f10", "$f11", "$f12", "$f13",
"$f14", "$f15", "$f16", "$f17", "$f18", "$f19", "$f20",
"$f21", "$f22", "$f23", "$f24", "$f25", "$f26", "$f27",
"$f28", "$f29", "$f30", "$f31", "$fcsr", "$fir"
};
return MakeVector(kRegisterNames,
sizeof(kRegisterNames) / sizeof(kRegisterNames[0]));
}
bool DwarfCFIToModule::Entry(size_t offset, uint64 address, uint64 length,
uint8 version, const string &augmentation,
unsigned return_address) {
assert(!entry_);
// If dwarf2reader::CallFrameInfo can handle this version and
// augmentation, then we should be okay with that, so there's no
// need to check them here.
// Get ready to collect entries.
entry_ = new Module::StackFrameEntry;
entry_->address = address;
entry_->size = length;
entry_offset_ = offset;
return_address_ = return_address;
// Breakpad STACK CFI records must provide a .ra rule, but DWARF CFI
// may not establish any rule for .ra if the return address column
// is an ordinary register, and that register holds the return
// address on entry to the function. So establish an initial .ra
// rule citing the return address register.
if (return_address_ < register_names_.size())
entry_->initial_rules[ra_name_] = register_names_[return_address_];
return true;
}
string DwarfCFIToModule::RegisterName(int i) {
assert(entry_);
if (i < 0) {
assert(i == kCFARegister);
return cfa_name_;
}
unsigned reg = i;
if (reg == return_address_)
return ra_name_;
// Ensure that a non-empty name exists for this register value.
if (reg < register_names_.size() && !register_names_[reg].empty())
return register_names_[reg];
reporter_->UnnamedRegister(entry_offset_, reg);
char buf[30];
sprintf(buf, "unnamed_register%u", reg);
return buf;
}
void DwarfCFIToModule::Record(Module::Address address, int reg,
const string &rule) {
assert(entry_);
// Place the name in our global set of strings, and then use the string
// from the set. Even though the assignment looks like a copy, all the
// major string implementations use reference counting internally,
// so the effect is to have all our data structures share copies of rules
// whenever possible. Since register names are drawn from a
// vector<string>, register names are already shared.
string shared_rule = *common_strings_.insert(rule).first;
// Is this one of this entry's initial rules?
if (address == entry_->address)
entry_->initial_rules[RegisterName(reg)] = shared_rule;
// File it under the appropriate address.
else
entry_->rule_changes[address][RegisterName(reg)] = shared_rule;
}
bool DwarfCFIToModule::UndefinedRule(uint64 address, int reg) {
reporter_->UndefinedNotSupported(entry_offset_, RegisterName(reg));
// Treat this as a non-fatal error.
return true;
}
bool DwarfCFIToModule::SameValueRule(uint64 address, int reg) {
ostringstream s;
s << RegisterName(reg);
Record(address, reg, s.str());
return true;
}
bool DwarfCFIToModule::OffsetRule(uint64 address, int reg,
int base_register, long offset) {
ostringstream s;
s << RegisterName(base_register) << " " << offset << " + ^";
Record(address, reg, s.str());
return true;
}
bool DwarfCFIToModule::ValOffsetRule(uint64 address, int reg,
int base_register, long offset) {
ostringstream s;
s << RegisterName(base_register) << " " << offset << " +";
Record(address, reg, s.str());
return true;
}
bool DwarfCFIToModule::RegisterRule(uint64 address, int reg,
int base_register) {
ostringstream s;
s << RegisterName(base_register);
Record(address, reg, s.str());
return true;
}
bool DwarfCFIToModule::ExpressionRule(uint64 address, int reg,
const string &expression) {
reporter_->ExpressionsNotSupported(entry_offset_, RegisterName(reg));
// Treat this as a non-fatal error.
return true;
}
bool DwarfCFIToModule::ValExpressionRule(uint64 address, int reg,
const string &expression) {
reporter_->ExpressionsNotSupported(entry_offset_, RegisterName(reg));
// Treat this as a non-fatal error.
return true;
}
bool DwarfCFIToModule::End() {
module_->AddStackFrameEntry(entry_);
entry_ = NULL;
return true;
}
void DwarfCFIToModule::Reporter::UnnamedRegister(size_t offset, int reg) {
fprintf(stderr, "%s, section '%s': "
"the call frame entry at offset 0x%zx refers to register %d,"
" whose name we don't know\n",
file_.c_str(), section_.c_str(), offset, reg);
}
void DwarfCFIToModule::Reporter::UndefinedNotSupported(size_t offset,
const string &reg) {
fprintf(stderr, "%s, section '%s': "
"the call frame entry at offset 0x%zx sets the rule for "
"register '%s' to 'undefined', but the Breakpad symbol file format"
" cannot express this\n",
file_.c_str(), section_.c_str(), offset, reg.c_str());
}
void DwarfCFIToModule::Reporter::ExpressionsNotSupported(size_t offset,
const string &reg) {
fprintf(stderr, "%s, section '%s': "
"the call frame entry at offset 0x%zx uses a DWARF expression to"
" describe how to recover register '%s', "
" but this translator cannot yet translate DWARF expressions to"
" Breakpad postfix expressions\n",
file_.c_str(), section_.c_str(), offset, reg.c_str());
}
} // namespace google_breakpad