diff options
| author | Dawid Potocki <dawid@dawidpotocki.com> | 2024-03-05 14:09:27 +1300 |
|---|---|---|
| committer | Dawid Potocki <dawid@dawidpotocki.com> | 2024-03-05 20:34:15 +1300 |
| commit | 063e15900bda8453fb0fc6751e78d064501ccbae (patch) | |
| tree | a4cd5f01dbca33a262333aff10e1e035217a30c8 /externals/breakpad/src/common/dwarf_cfi_to_module.cc | |
| parent | 537296095ab24eddcb196b5ef98004f91de9c8c2 (diff) | |
Diffstat (limited to 'externals/breakpad/src/common/dwarf_cfi_to_module.cc')
| -rw-r--r-- | externals/breakpad/src/common/dwarf_cfi_to_module.cc | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/externals/breakpad/src/common/dwarf_cfi_to_module.cc b/externals/breakpad/src/common/dwarf_cfi_to_module.cc new file mode 100644 index 0000000000..4c594175e8 --- /dev/null +++ b/externals/breakpad/src/common/dwarf_cfi_to_module.cc @@ -0,0 +1,324 @@ +// -*- mode: c++ -*- + +// Copyright 2010 Google LLC +// +// 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 LLC 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. + +#ifdef HAVE_CONFIG_H +#include <config.h> // Must come first +#endif + +#include <memory> +#include <sstream> +#include <utility> + +#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])); +} + +vector<string> DwarfCFIToModule::RegisterNames::RISCV() { + static const char *const names[] = { + "pc", "ra", "sp", "gp", "tp", "t0", "t1", "t2", + "s0", "s1", "a0", "a1", "a2", "a3", "a4", "a5", + "a6", "a7", "s2", "s3", "s4", "s5", "s6", "s7", + "s8", "s9", "s10", "s11", "t3", "t4", "t5", "t6", + "f0", "f1", "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", + "", "", "", "", "", "", "", "", + "", "", "", "", "", "", "", "", + "", "", "", "", "", "", "", "", + "", "", "", "", "", "", "", "", + "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])); +} + +bool DwarfCFIToModule::Entry(size_t offset, uint64_t address, uint64_t length, + uint8_t version, const string& augmentation, + unsigned return_address) { + assert(!entry_); + + // If 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_ = std::make_unique<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); + return string("unnamed_register") + std::to_string(reg); +} + +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_t address, int reg) { + reporter_->UndefinedNotSupported(entry_offset_, RegisterName(reg)); + // Treat this as a non-fatal error. + return true; +} + +bool DwarfCFIToModule::SameValueRule(uint64_t address, int reg) { + ostringstream s; + s << RegisterName(reg); + Record(address, reg, s.str()); + return true; +} + +bool DwarfCFIToModule::OffsetRule(uint64_t 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_t 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_t address, int reg, + int base_register) { + ostringstream s; + s << RegisterName(base_register); + Record(address, reg, s.str()); + return true; +} + +bool DwarfCFIToModule::ExpressionRule(uint64_t 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_t 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(std::move(entry_)); + return true; +} + +string DwarfCFIToModule::Architecture() { + return module_->architecture(); +} + +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 |