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breakpad/src/processor/stackwalker_mips.cc
Ian Barkley-Yeung f5123d7196 Add #include <config.h> to the beginning of all cc files 
Added
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
to the beginning of all source files that didn't have it.

This ensures that configuration options are respected in all source
files. In particular, it ensures that the defines needed to fix Large
File System issues are set before including system headers.

More generally, it ensures consistency between the source files, and
avoids the possibility of ODR violations between source files that were
including config.h and source files that were not.

Process:
Ran
find . \( -name third_party -prune \) -o \( -name '.git*' -prune \) -o \( \( -name '*.cc' -o -name '*.c' \) -exec sed -i '0,/^#include/ s/^#include/#ifdef HAVE_CONFIG_H\n#include <config.h>  \/\/ Must come first\n#endif\n\n#include/' {} + \)
and then manually fixed up src/common/linux/guid_creator.cc,
src/tools/solaris/dump_syms/testdata/dump_syms_regtest.cc,
src/tools/windows/dump_syms/testdata/dump_syms_regtest.cc,
src/common/stabs_reader.h, and src/common/linux/breakpad_getcontext.h.

BUG=google-breakpad:877
Fixed: google-breakpad:877
TEST=./configure && make && make check
TEST=Did the find/sed in ChromeOS's copy, ensured emerge-hana google-breakpad
worked and had fewer LFS violations.
TEST=Did the find/sed in Chrome's copy, ensured compiling hana, windows, linux, and
eve still worked (since Chrome doesn't used config.h)

Change-Id: I16cededbba0ea0c28e919b13243e35300999e799
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/4289676
Reviewed-by: Mike Frysinger <vapier@chromium.org>
2023-02-27 19:31:32 +00:00

446 lines
17 KiB
C++
Raw Blame History

// Copyright 2013 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.
// stackwalker_mips.cc: MIPS-specific stackwalker.
//
// See stackwalker_mips.h for documentation.
//
// Author: Tata Elxsi
#ifdef HAVE_CONFIG_H
#include <config.h> // Must come first
#endif
#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 (memory_) {
if (context_->context_flags & MD_CONTEXT_MIPS64 ) {
if (0xffffffffffffffff - memory_->GetBase() < memory_->GetSize() - 1) {
BPLOG(ERROR) << "Memory out of range for stackwalking mips64: "
<< HexString(memory_->GetBase())
<< "+"
<< HexString(memory_->GetSize());
memory_ = NULL;
}
} else {
if (0xffffffff - memory_->GetBase() < memory_->GetSize() - 1) {
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 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()) {
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 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()) {
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;
}
// Should we terminate the stack walk? (end-of-stack or broken invariant)
if (TerminateWalk(new_frame->context.epc,
new_frame->context.iregs[MD_CONTEXT_MIPS_REG_SP],
last_frame->context.iregs[MD_CONTEXT_MIPS_REG_SP],
/*first_unwind=*/last_frame->trust ==
StackFrame::FRAME_TRUST_CONTEXT)) {
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
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