| // 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. |
| |
| // stackwalker.cc: Generic stackwalker. |
| // |
| // See stackwalker.h for documentation. |
| // |
| // Author: Mark Mentovai |
| |
| #include "google_breakpad/processor/stackwalker.h" |
| |
| #include <assert.h> |
| |
| #include "google_breakpad/processor/call_stack.h" |
| #include "google_breakpad/processor/code_module.h" |
| #include "google_breakpad/processor/code_modules.h" |
| #include "google_breakpad/processor/minidump.h" |
| #include "google_breakpad/processor/source_line_resolver_interface.h" |
| #include "google_breakpad/processor/stack_frame.h" |
| #include "google_breakpad/processor/symbol_supplier.h" |
| #include "processor/linked_ptr.h" |
| #include "processor/logging.h" |
| #include "processor/scoped_ptr.h" |
| #include "processor/stackwalker_ppc.h" |
| #include "processor/stackwalker_sparc.h" |
| #include "processor/stackwalker_x86.h" |
| #include "processor/stackwalker_amd64.h" |
| #include "processor/stackwalker_arm.h" |
| |
| namespace google_breakpad { |
| |
| u_int32_t Stackwalker::max_frames_ = 1024; |
| |
| Stackwalker::Stackwalker(const SystemInfo *system_info, |
| MemoryRegion *memory, |
| const CodeModules *modules, |
| SymbolSupplier *supplier, |
| SourceLineResolverInterface *resolver) |
| : system_info_(system_info), |
| memory_(memory), |
| modules_(modules), |
| resolver_(resolver), |
| supplier_(supplier) { |
| } |
| |
| |
| bool Stackwalker::Walk(CallStack *stack) { |
| BPLOG_IF(ERROR, !stack) << "Stackwalker::Walk requires |stack|"; |
| assert(stack); |
| stack->Clear(); |
| |
| // Begin with the context frame, and keep getting callers until there are |
| // no more. |
| |
| // Take ownership of the pointer returned by GetContextFrame. |
| scoped_ptr<StackFrame> frame(GetContextFrame()); |
| |
| while (frame.get()) { |
| // frame already contains a good frame with properly set instruction and |
| // frame_pointer fields. The frame structure comes from either the |
| // context frame (above) or a caller frame (below). |
| |
| // Resolve the module information, if a module map was provided. |
| if (modules_) { |
| const CodeModule *module = |
| modules_->GetModuleForAddress(frame->instruction); |
| if (module) { |
| frame->module = module; |
| if (resolver_ && |
| !resolver_->HasModule(frame->module) && |
| no_symbol_modules_.find( |
| module->code_file()) == no_symbol_modules_.end() && |
| supplier_) { |
| string symbol_file; |
| char *symbol_data = NULL; |
| SymbolSupplier::SymbolResult symbol_result = |
| supplier_->GetCStringSymbolData(module, |
| system_info_, |
| &symbol_file, |
| &symbol_data); |
| |
| switch (symbol_result) { |
| case SymbolSupplier::FOUND: |
| resolver_->LoadModuleUsingMemoryBuffer(frame->module, |
| symbol_data); |
| break; |
| case SymbolSupplier::NOT_FOUND: |
| no_symbol_modules_.insert(module->code_file()); |
| break; // nothing to do |
| case SymbolSupplier::INTERRUPT: |
| return false; |
| } |
| // Inform symbol supplier to free the unused data memory buffer. |
| if (resolver_->ShouldDeleteMemoryBufferAfterLoadModule()) |
| supplier_->FreeSymbolData(module); |
| } |
| if (resolver_) |
| resolver_->FillSourceLineInfo(frame.get()); |
| } |
| } |
| |
| // Add the frame to the call stack. Relinquish the ownership claim |
| // over the frame, because the stack now owns it. |
| stack->frames_.push_back(frame.release()); |
| if (stack->frames_.size() > max_frames_) { |
| BPLOG(ERROR) << "The stack is over " << max_frames_ << " frames."; |
| break; |
| } |
| |
| // Get the next frame and take ownership. |
| frame.reset(GetCallerFrame(stack)); |
| } |
| |
| return true; |
| } |
| |
| |
| // static |
| Stackwalker* Stackwalker::StackwalkerForCPU( |
| const SystemInfo *system_info, |
| MinidumpContext *context, |
| MemoryRegion *memory, |
| const CodeModules *modules, |
| SymbolSupplier *supplier, |
| SourceLineResolverInterface *resolver) { |
| if (!context) { |
| BPLOG(ERROR) << "Can't choose a stackwalker implementation without context"; |
| return NULL; |
| } |
| |
| Stackwalker *cpu_stackwalker = NULL; |
| |
| u_int32_t cpu = context->GetContextCPU(); |
| switch (cpu) { |
| case MD_CONTEXT_X86: |
| cpu_stackwalker = new StackwalkerX86(system_info, |
| context->GetContextX86(), |
| memory, modules, supplier, |
| resolver); |
| break; |
| |
| case MD_CONTEXT_PPC: |
| cpu_stackwalker = new StackwalkerPPC(system_info, |
| context->GetContextPPC(), |
| memory, modules, supplier, |
| resolver); |
| break; |
| |
| case MD_CONTEXT_AMD64: |
| cpu_stackwalker = new StackwalkerAMD64(system_info, |
| context->GetContextAMD64(), |
| memory, modules, supplier, |
| resolver); |
| break; |
| |
| case MD_CONTEXT_SPARC: |
| cpu_stackwalker = new StackwalkerSPARC(system_info, |
| context->GetContextSPARC(), |
| memory, modules, supplier, |
| resolver); |
| break; |
| |
| case MD_CONTEXT_ARM: |
| cpu_stackwalker = new StackwalkerARM(system_info, |
| context->GetContextARM(), |
| memory, modules, supplier, |
| resolver); |
| break; |
| } |
| |
| BPLOG_IF(ERROR, !cpu_stackwalker) << "Unknown CPU type " << HexString(cpu) << |
| ", can't choose a stackwalker " |
| "implementation"; |
| return cpu_stackwalker; |
| } |
| |
| bool Stackwalker::InstructionAddressSeemsValid(u_int64_t address) { |
| const CodeModule *module = modules_->GetModuleForAddress(address); |
| if (!module) { |
| // not inside any loaded module |
| return false; |
| } |
| |
| if (!resolver_ || !supplier_) { |
| // we don't have a resolver and or symbol supplier, |
| // but we're inside a known module |
| return true; |
| } |
| |
| if (!resolver_->HasModule(module)) { |
| string symbol_file; |
| char *symbol_data = NULL; |
| SymbolSupplier::SymbolResult symbol_result = |
| supplier_->GetCStringSymbolData(module, system_info_, |
| &symbol_file, &symbol_data); |
| |
| if (symbol_result != SymbolSupplier::FOUND || |
| !resolver_->LoadModuleUsingMemoryBuffer(module, |
| symbol_data)) { |
| // we don't have symbols, but we're inside a loaded module |
| return true; |
| } |
| } |
| |
| StackFrame frame; |
| frame.module = module; |
| frame.instruction = address; |
| resolver_->FillSourceLineInfo(&frame); |
| // we have symbols, so return true if inside a function |
| return !frame.function_name.empty(); |
| } |
| |
| } // namespace google_breakpad |
