diff options
Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/processor/stackwalker_mips.cc')
| -rw-r--r-- | toolkit/crashreporter/google-breakpad/src/processor/stackwalker_mips.cc | 448 |
1 files changed, 0 insertions, 448 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/processor/stackwalker_mips.cc b/toolkit/crashreporter/google-breakpad/src/processor/stackwalker_mips.cc deleted file mode 100644 index db55d460c..000000000 --- a/toolkit/crashreporter/google-breakpad/src/processor/stackwalker_mips.cc +++ /dev/null @@ -1,448 +0,0 @@ -// Copyright (c) 2013 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_mips.cc: MIPS-specific stackwalker. -// -// See stackwalker_mips.h for documentation. -// -// Author: Tata Elxsi - -#include "common/scoped_ptr.h" -#include "google_breakpad/processor/call_stack.h" -#include "google_breakpad/processor/code_modules.h" -#include "google_breakpad/processor/memory_region.h" -#include "google_breakpad/processor/source_line_resolver_interface.h" -#include "google_breakpad/processor/stack_frame_cpu.h" -#include "processor/cfi_frame_info.h" -#include "processor/logging.h" -#include "processor/postfix_evaluator-inl.h" -#include "processor/stackwalker_mips.h" -#include "processor/windows_frame_info.h" -#include "google_breakpad/common/minidump_cpu_mips.h" - -namespace google_breakpad { - -StackwalkerMIPS::StackwalkerMIPS(const SystemInfo* system_info, - const MDRawContextMIPS* context, - MemoryRegion* memory, - const CodeModules* modules, - StackFrameSymbolizer* resolver_helper) -: Stackwalker(system_info, memory, modules, resolver_helper), - context_(context) { - if (context_->context_flags & MD_CONTEXT_MIPS64 ) { - if ((memory_ && memory_->GetBase() + memory_->GetSize() - 1) - > 0xffffffffffffffff) { - BPLOG(ERROR) << "Memory out of range for stackwalking mips64: " - << HexString(memory_->GetBase()) - << "+" - << HexString(memory_->GetSize()); - memory_ = NULL; - } - } else { - if ((memory_ && memory_->GetBase() + memory_->GetSize() - 1) > 0xffffffff) { - BPLOG(ERROR) << "Memory out of range for stackwalking mips32: " - << HexString(memory_->GetBase()) - << "+" - << HexString(memory_->GetSize()); - memory_ = NULL; - } - } -} - -StackFrame* StackwalkerMIPS::GetContextFrame() { - if (!context_) { - BPLOG(ERROR) << "Can't get context frame without context."; - return NULL; - } - - StackFrameMIPS* frame = new StackFrameMIPS(); - - // The instruction pointer is stored directly in a register, so pull it - // straight out of the CPU context structure. - frame->context = *context_; - frame->context_validity = StackFrameMIPS::CONTEXT_VALID_ALL; - frame->trust = StackFrame::FRAME_TRUST_CONTEXT; - frame->instruction = frame->context.epc; - - return frame; -} - -// Register names for mips. -static const char* const kRegisterNames[] = { - "$zero", "$at", "$v0", "$v1", "$a0", "$a1", "$a2", "$a3", "$to", "$t1", - "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$s0", "$s1", "$s2", "$s3", - "$s4", "$s5", "$s6", "$s7", "$t8", "$t9", "$k0", "$k1", "$gp", "$sp", - "$fp", "$ra", NULL - // TODO(gordanac): add float point save registers -}; - -StackFrameMIPS* StackwalkerMIPS::GetCallerByCFIFrameInfo( - const vector<StackFrame*>& frames, - CFIFrameInfo* cfi_frame_info) { - StackFrameMIPS* last_frame = static_cast<StackFrameMIPS*>(frames.back()); - - if (context_->context_flags & MD_CONTEXT_MIPS) { - uint32_t sp = 0, pc = 0; - - // Populate a dictionary with the valid register values in last_frame. - CFIFrameInfo::RegisterValueMap<uint32_t> callee_registers; - // Use the STACK CFI data to recover the caller's register values. - CFIFrameInfo::RegisterValueMap<uint32_t> caller_registers; - - for (int i = 0; kRegisterNames[i]; ++i) { - caller_registers[kRegisterNames[i]] = last_frame->context.iregs[i]; - callee_registers[kRegisterNames[i]] = last_frame->context.iregs[i]; - } - - if (!cfi_frame_info->FindCallerRegs(callee_registers, *memory_, - &caller_registers)) { - return NULL; - } - - CFIFrameInfo::RegisterValueMap<uint32_t>::const_iterator entry = - caller_registers.find(".cfa"); - - if (entry != caller_registers.end()) { - sp = entry->second; - caller_registers["$sp"] = entry->second; - } - - entry = caller_registers.find(".ra"); - if (entry != caller_registers.end()) { - caller_registers["$ra"] = entry->second; - pc = entry->second - 2 * sizeof(pc); - } - caller_registers["$pc"] = pc; - // Construct a new stack frame given the values the CFI recovered. - scoped_ptr<StackFrameMIPS> frame(new StackFrameMIPS()); - - for (int i = 0; kRegisterNames[i]; ++i) { - CFIFrameInfo::RegisterValueMap<uint32_t>::const_iterator caller_entry = - caller_registers.find(kRegisterNames[i]); - - if (caller_entry != caller_registers.end()) { - // The value of this register is recovered; fill the context with the - // value from caller_registers. - frame->context.iregs[i] = caller_entry->second; - frame->context_validity |= StackFrameMIPS::RegisterValidFlag(i); - } else if (((i >= INDEX_MIPS_REG_S0 && i <= INDEX_MIPS_REG_S7) || - (i > INDEX_MIPS_REG_GP && i < INDEX_MIPS_REG_RA)) && - (last_frame->context_validity & - StackFrameMIPS::RegisterValidFlag(i))) { - // If the STACK CFI data doesn't mention some callee-save register, and - // it is valid in the callee, assume the callee has not yet changed it. - // Calee-save registers according to the MIPS o32 ABI specification are: - // $s0 to $s7 - // $sp, $s8 - frame->context.iregs[i] = last_frame->context.iregs[i]; - frame->context_validity |= StackFrameMIPS::RegisterValidFlag(i); - } - } - - frame->context.epc = caller_registers["$pc"]; - frame->instruction = caller_registers["$pc"]; - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_PC; - - frame->context.iregs[MD_CONTEXT_MIPS_REG_RA] = caller_registers["$ra"]; - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_RA; - - frame->trust = StackFrame::FRAME_TRUST_CFI; - - return frame.release(); - } else { - uint64_t sp = 0, pc = 0; - - // Populate a dictionary with the valid register values in last_frame. - CFIFrameInfo::RegisterValueMap<uint64_t> callee_registers; - // Use the STACK CFI data to recover the caller's register values. - CFIFrameInfo::RegisterValueMap<uint64_t> caller_registers; - - for (int i = 0; kRegisterNames[i]; ++i) { - caller_registers[kRegisterNames[i]] = last_frame->context.iregs[i]; - callee_registers[kRegisterNames[i]] = last_frame->context.iregs[i]; - } - - if (!cfi_frame_info->FindCallerRegs(callee_registers, *memory_, - &caller_registers)) { - return NULL; - } - - CFIFrameInfo::RegisterValueMap<uint64_t>::const_iterator entry = - caller_registers.find(".cfa"); - - if (entry != caller_registers.end()) { - sp = entry->second; - caller_registers["$sp"] = entry->second; - } - - entry = caller_registers.find(".ra"); - if (entry != caller_registers.end()) { - caller_registers["$ra"] = entry->second; - pc = entry->second - 2 * sizeof(pc); - } - caller_registers["$pc"] = pc; - // Construct a new stack frame given the values the CFI recovered. - scoped_ptr<StackFrameMIPS> frame(new StackFrameMIPS()); - - for (int i = 0; kRegisterNames[i]; ++i) { - CFIFrameInfo::RegisterValueMap<uint64_t>::const_iterator caller_entry = - caller_registers.find(kRegisterNames[i]); - - if (caller_entry != caller_registers.end()) { - // The value of this register is recovered; fill the context with the - // value from caller_registers. - frame->context.iregs[i] = caller_entry->second; - frame->context_validity |= StackFrameMIPS::RegisterValidFlag(i); - } else if (((i >= INDEX_MIPS_REG_S0 && i <= INDEX_MIPS_REG_S7) || - (i >= INDEX_MIPS_REG_GP && i < INDEX_MIPS_REG_RA)) && - (last_frame->context_validity & - StackFrameMIPS::RegisterValidFlag(i))) { - // If the STACK CFI data doesn't mention some callee-save register, and - // it is valid in the callee, assume the callee has not yet changed it. - // Calee-save registers according to the MIPS o32 ABI specification are: - // $s0 to $s7 - // $sp, $s8 - frame->context.iregs[i] = last_frame->context.iregs[i]; - frame->context_validity |= StackFrameMIPS::RegisterValidFlag(i); - } - } - - frame->context.epc = caller_registers["$pc"]; - frame->instruction = caller_registers["$pc"]; - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_PC; - - frame->context.iregs[MD_CONTEXT_MIPS_REG_RA] = caller_registers["$ra"]; - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_RA; - - frame->trust = StackFrame::FRAME_TRUST_CFI; - - return frame.release(); - } -} - -StackFrame* StackwalkerMIPS::GetCallerFrame(const CallStack* stack, - bool stack_scan_allowed) { - if (!memory_ || !stack) { - BPLOG(ERROR) << "Can't get caller frame without memory or stack"; - return NULL; - } - - const vector<StackFrame*>& frames = *stack->frames(); - StackFrameMIPS* last_frame = static_cast<StackFrameMIPS*>(frames.back()); - scoped_ptr<StackFrameMIPS> new_frame; - - // See if there is DWARF call frame information covering this address. - scoped_ptr<CFIFrameInfo> cfi_frame_info( - frame_symbolizer_->FindCFIFrameInfo(last_frame)); - if (cfi_frame_info.get()) - new_frame.reset(GetCallerByCFIFrameInfo(frames, cfi_frame_info.get())); - - // If caller frame is not found in CFI try analyzing the stack. - if (stack_scan_allowed && !new_frame.get()) { - new_frame.reset(GetCallerByStackScan(frames)); - } - - // If nothing worked, tell the caller. - if (!new_frame.get()) { - return NULL; - } - - // Treat an instruction address of 0 as end-of-stack. - if (new_frame->context.epc == 0) { - return NULL; - } - - // If the new stack pointer is at a lower address than the old, then - // that's clearly incorrect. Treat this as end-of-stack to enforce - // progress and avoid infinite loops. - if (new_frame->context.iregs[MD_CONTEXT_MIPS_REG_SP] <= - last_frame->context.iregs[MD_CONTEXT_MIPS_REG_SP]) { - return NULL; - } - - return new_frame.release(); -} - -StackFrameMIPS* StackwalkerMIPS::GetCallerByStackScan( - const vector<StackFrame*>& frames) { - const uint32_t kMaxFrameStackSize = 1024; - const uint32_t kMinArgsOnStack = 4; - - StackFrameMIPS* last_frame = static_cast<StackFrameMIPS*>(frames.back()); - - if (context_->context_flags & MD_CONTEXT_MIPS) { - uint32_t last_sp = last_frame->context.iregs[MD_CONTEXT_MIPS_REG_SP]; - uint32_t caller_pc, caller_sp, caller_fp; - - // Return address cannot be obtained directly. - // Force stackwalking. - - // We cannot use frame pointer to get the return address. - // We'll scan the stack for a - // return address. This can happen if last_frame is executing code - // for a module for which we don't have symbols. - int count = kMaxFrameStackSize / sizeof(caller_pc); - - if (frames.size() > 1) { - // In case of mips32 ABI stack frame of a nonleaf function - // must have minimum stack frame assigned for 4 arguments (4 words). - // Move stack pointer for 4 words to avoid reporting non-existing frames - // for all frames except the topmost one. - // There is no way of knowing if topmost frame belongs to a leaf or - // a nonleaf function. - last_sp += kMinArgsOnStack * sizeof(caller_pc); - // Adjust 'count' so that return address is scanned only in limits - // of one stack frame. - count -= kMinArgsOnStack; - } - - do { - // Scanning for return address from stack pointer of the last frame. - if (!ScanForReturnAddress(last_sp, &caller_sp, &caller_pc, count)) { - // If we can't find an instruction pointer even with stack scanning, - // give up. - BPLOG(ERROR) << " ScanForReturnAddress failed "; - return NULL; - } - // Get $fp stored in the stack frame. - if (!memory_->GetMemoryAtAddress(caller_sp - sizeof(caller_pc), - &caller_fp)) { - BPLOG(INFO) << " GetMemoryAtAddress for fp failed " ; - return NULL; - } - - count = count - (caller_sp - last_sp) / sizeof(caller_pc); - // Now scan the next address in the stack. - last_sp = caller_sp + sizeof(caller_pc); - } while ((caller_fp - caller_sp >= kMaxFrameStackSize) && count > 0); - - if (!count) { - BPLOG(INFO) << " No frame found " ; - return NULL; - } - - // ScanForReturnAddress found a reasonable return address. Advance - // $sp to the location above the one where the return address was - // found. - caller_sp += sizeof(caller_pc); - // caller_pc is actually containing $ra value; - // $pc is two instructions before $ra, - // so the caller_pc needs to be decremented accordingly. - caller_pc -= 2 * sizeof(caller_pc); - - // Create a new stack frame (ownership will be transferred to the caller) - // and fill it in. - StackFrameMIPS* frame = new StackFrameMIPS(); - frame->trust = StackFrame::FRAME_TRUST_SCAN; - frame->context = last_frame->context; - frame->context.epc = caller_pc; - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_PC; - frame->instruction = caller_pc; - - frame->context.iregs[MD_CONTEXT_MIPS_REG_SP] = caller_sp; - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_SP; - frame->context.iregs[MD_CONTEXT_MIPS_REG_FP] = caller_fp; - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_FP; - - frame->context.iregs[MD_CONTEXT_MIPS_REG_RA] = - caller_pc + 2 * sizeof(caller_pc); - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_RA; - - return frame; - } else { - uint64_t last_sp = last_frame->context.iregs[MD_CONTEXT_MIPS_REG_SP]; - uint64_t caller_pc, caller_sp, caller_fp; - - // Return address cannot be obtained directly. - // Force stackwalking. - - // We cannot use frame pointer to get the return address. - // We'll scan the stack for a - // return address. This can happen if last_frame is executing code - // for a module for which we don't have symbols. - int count = kMaxFrameStackSize / sizeof(caller_pc); - - do { - // Scanning for return address from stack pointer of the last frame. - if (!ScanForReturnAddress(last_sp, &caller_sp, &caller_pc, count)) { - // If we can't find an instruction pointer even with stack scanning, - // give up. - BPLOG(ERROR) << " ScanForReturnAddress failed "; - return NULL; - } - // Get $fp stored in the stack frame. - if (!memory_->GetMemoryAtAddress(caller_sp - sizeof(caller_pc), - &caller_fp)) { - BPLOG(INFO) << " GetMemoryAtAddress for fp failed " ; - return NULL; - } - - count = count - (caller_sp - last_sp) / sizeof(caller_pc); - // Now scan the next address in the stack. - last_sp = caller_sp + sizeof(caller_pc); - } while ((caller_fp - caller_sp >= kMaxFrameStackSize) && count > 0); - - if (!count) { - BPLOG(INFO) << " No frame found " ; - return NULL; - } - - // ScanForReturnAddress found a reasonable return address. Advance - // $sp to the location above the one where the return address was - // found. - caller_sp += sizeof(caller_pc); - // caller_pc is actually containing $ra value; - // $pc is two instructions before $ra, - // so the caller_pc needs to be decremented accordingly. - caller_pc -= 2 * sizeof(caller_pc); - - // Create a new stack frame (ownership will be transferred to the caller) - // and fill it in. - StackFrameMIPS* frame = new StackFrameMIPS(); - frame->trust = StackFrame::FRAME_TRUST_SCAN; - frame->context = last_frame->context; - frame->context.epc = caller_pc; - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_PC; - frame->instruction = caller_pc; - - frame->context.iregs[MD_CONTEXT_MIPS_REG_SP] = caller_sp; - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_SP; - frame->context.iregs[MD_CONTEXT_MIPS_REG_FP] = caller_fp; - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_FP; - - frame->context.iregs[MD_CONTEXT_MIPS_REG_RA] = - caller_pc + 2 * sizeof(caller_pc); - frame->context_validity |= StackFrameMIPS::CONTEXT_VALID_RA; - - return frame; - } -} - -} // namespace google_breakpad - |