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Add support to the StackWalker for resolving symbols, using a

Browse source 
caller-implemented SymbolSupplier object to get a symbol file.

Add a CrashReportProcessor object which provides a simple API for processing
a CrashReport struct, given a SymbolSupplier and a minidump file.

r=mmentovai (#17))


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@18 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
bryner 2006-09-08 02:35:53 +00:00
parent 39716226cf
commit d5e66382d1
17 changed files with 14492 additions and 3332 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
Makefile.am
View file

@ -37,7 +37,10 @@ lib_LTLIBRARIES = src/libairbag.la
src_libairbag_la_SOURCES = \
src/google/airbag_types.h \
src/google/crash_report.h \
src/google/crash_report_processor.h \
src/google/stack_frame.h \
src/google/symbol_supplier.h \
src/processor/crash_report_processor.cc \
src/processor/memory_region.h \
src/processor/minidump.cc \
src/processor/minidump.h \
@ -60,7 +63,8 @@ bin_PROGRAMS = \
## Tests
check_PROGRAMS = \
src/processor/range_map_unittest \
src/processor/source_line_resolver_unittest
src/processor/source_line_resolver_unittest \
src/processor/crash_report_processor_unittest
check_SCRIPTS = \
src/processor/minidump_dump_test \
src/processor/minidump_stackwalk_test
@ -75,6 +79,14 @@ src_processor_source_line_resolver_unittest_SOURCES = \
src_processor_source_line_resolver_unittest_LDADD = \
src/processor/source_line_resolver.lo
src_processor_crash_report_processor_unittest_SOURCES = \
src/processor/crash_report_processor_unittest.cc
src_processor_crash_report_processor_unittest_LDADD = \
src/processor/crash_report_processor.lo \
src/processor/minidump.lo \
src/processor/stackwalker.lo \
src/processor/stackwalker_x86.lo \
src/processor/source_line_resolver.lo
## Non-installables
noinst_PROGRAMS =
@ -90,7 +102,8 @@ src_processor_minidump_stackwalk_SOURCES = \
src_processor_minidump_stackwalk_LDADD = \
src/processor/minidump.lo \
src/processor/stackwalker.lo \
src/processor/stackwalker_x86.lo
src/processor/stackwalker_x86.lo \
src/processor/source_line_resolver.lo
## Additional files to be included in a source distribution
@ -99,6 +112,8 @@ EXTRA_DIST = \
src/processor/testdata/minidump1.dmp \
src/processor/testdata/minidump1.out \
src/processor/testdata/minidump1.stack.out \
src/processor/testdata/minidump2.dmp \
src/processor/testdata/minidump2.sym \
src/processor/testdata/module1.out \
src/processor/testdata/module2.out \
src/processor/testdata/module3_bad.out

56
Makefile.in
View file

@ -1,4 +1,4 @@
# Makefile.in generated by automake 1.9.6 from Makefile.am.
# Makefile.in generated by automake 1.9.5 from Makefile.am.
# @configure_input@
# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
@ -31,6 +31,8 @@
SOURCES = $(src_libairbag_la_SOURCES) $(src_processor_crash_report_processor_unittest_SOURCES) $(src_processor_minidump_dump_SOURCES) $(src_processor_minidump_stackwalk_SOURCES) $(src_processor_range_map_unittest_SOURCES) $(src_processor_source_line_resolver_unittest_SOURCES)
srcdir = @srcdir@
top_srcdir = @top_srcdir@
VPATH = @srcdir@
@ -56,7 +58,8 @@ host_triplet = @host@
bin_PROGRAMS = src/processor/minidump_dump$(EXEEXT) \
src/processor/minidump_stackwalk$(EXEEXT)
check_PROGRAMS = src/processor/range_map_unittest$(EXEEXT) \
src/processor/source_line_resolver_unittest$(EXEEXT)
src/processor/source_line_resolver_unittest$(EXEEXT) \
src/processor/crash_report_processor_unittest$(EXEEXT)
noinst_PROGRAMS =
DIST_COMMON = README $(am__configure_deps) $(dist_doc_DATA) \
$(srcdir)/Makefile.am $(srcdir)/Makefile.in \
@ -86,12 +89,22 @@ libLTLIBRARIES_INSTALL = $(INSTALL)
LTLIBRARIES = $(lib_LTLIBRARIES)
src_libairbag_la_LIBADD =
am__dirstamp = $(am__leading_dot)dirstamp
am_src_libairbag_la_OBJECTS = src/processor/minidump.lo \
am_src_libairbag_la_OBJECTS = src/processor/crash_report_processor.lo \
src/processor/minidump.lo \
src/processor/source_line_resolver.lo \
src/processor/stackwalker.lo src/processor/stackwalker_x86.lo
src_libairbag_la_OBJECTS = $(am_src_libairbag_la_OBJECTS)
binPROGRAMS_INSTALL = $(INSTALL_PROGRAM)
PROGRAMS = $(bin_PROGRAMS) $(noinst_PROGRAMS)
am_src_processor_crash_report_processor_unittest_OBJECTS = \
src/processor/crash_report_processor_unittest.$(OBJEXT)
src_processor_crash_report_processor_unittest_OBJECTS = \
$(am_src_processor_crash_report_processor_unittest_OBJECTS)
src_processor_crash_report_processor_unittest_DEPENDENCIES = \
src/processor/crash_report_processor.lo \
src/processor/minidump.lo src/processor/stackwalker.lo \
src/processor/stackwalker_x86.lo \
src/processor/source_line_resolver.lo
am_src_processor_minidump_dump_OBJECTS = \
src/processor/minidump_dump.$(OBJEXT)
src_processor_minidump_dump_OBJECTS = \
@ -103,7 +116,8 @@ src_processor_minidump_stackwalk_OBJECTS = \
$(am_src_processor_minidump_stackwalk_OBJECTS)
src_processor_minidump_stackwalk_DEPENDENCIES = \
src/processor/minidump.lo src/processor/stackwalker.lo \
src/processor/stackwalker_x86.lo
src/processor/stackwalker_x86.lo \
src/processor/source_line_resolver.lo
am_src_processor_range_map_unittest_OBJECTS = \
src/processor/range_map_unittest.$(OBJEXT)
src_processor_range_map_unittest_OBJECTS = \
@ -136,11 +150,13 @@ CCLD = $(CC)
LINK = $(LIBTOOL) --tag=CC --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
$(AM_LDFLAGS) $(LDFLAGS) -o $@
SOURCES = $(src_libairbag_la_SOURCES) \
$(src_processor_crash_report_processor_unittest_SOURCES) \
$(src_processor_minidump_dump_SOURCES) \
$(src_processor_minidump_stackwalk_SOURCES) \
$(src_processor_range_map_unittest_SOURCES) \
$(src_processor_source_line_resolver_unittest_SOURCES)
DIST_SOURCES = $(src_libairbag_la_SOURCES) \
$(src_processor_crash_report_processor_unittest_SOURCES) \
$(src_processor_minidump_dump_SOURCES) \
$(src_processor_minidump_stackwalk_SOURCES) \
$(src_processor_range_map_unittest_SOURCES) \
@ -273,7 +289,10 @@ lib_LTLIBRARIES = src/libairbag.la
src_libairbag_la_SOURCES = \
src/google/airbag_types.h \
src/google/crash_report.h \
src/google/crash_report_processor.h \
src/google/stack_frame.h \
src/google/symbol_supplier.h \
src/processor/crash_report_processor.cc \
src/processor/memory_region.h \
src/processor/minidump.cc \
src/processor/minidump.h \
@ -301,6 +320,16 @@ src_processor_source_line_resolver_unittest_SOURCES = \
src_processor_source_line_resolver_unittest_LDADD = \
src/processor/source_line_resolver.lo
src_processor_crash_report_processor_unittest_SOURCES = \
src/processor/crash_report_processor_unittest.cc
src_processor_crash_report_processor_unittest_LDADD = \
src/processor/crash_report_processor.lo \
src/processor/minidump.lo \
src/processor/stackwalker.lo \
src/processor/stackwalker_x86.lo \
src/processor/source_line_resolver.lo
noinst_SCRIPTS = $(check_SCRIPTS)
src_processor_minidump_dump_SOURCES = \
src/processor/minidump_dump.cc
@ -314,13 +343,16 @@ src_processor_minidump_stackwalk_SOURCES = \
src_processor_minidump_stackwalk_LDADD = \
src/processor/minidump.lo \
src/processor/stackwalker.lo \
src/processor/stackwalker_x86.lo
src/processor/stackwalker_x86.lo \
src/processor/source_line_resolver.lo
EXTRA_DIST = \
$(SCRIPTS) \
src/processor/testdata/minidump1.dmp \
src/processor/testdata/minidump1.out \
src/processor/testdata/minidump1.stack.out \
src/processor/testdata/minidump2.dmp \
src/processor/testdata/minidump2.sym \
src/processor/testdata/module1.out \
src/processor/testdata/module2.out \
src/processor/testdata/module3_bad.out
@ -412,6 +444,9 @@ src/processor/$(am__dirstamp):
src/processor/$(DEPDIR)/$(am__dirstamp):
@$(mkdir_p) src/processor/$(DEPDIR)
@: > src/processor/$(DEPDIR)/$(am__dirstamp)
src/processor/crash_report_processor.lo: \
src/processor/$(am__dirstamp) \
src/processor/$(DEPDIR)/$(am__dirstamp)
src/processor/minidump.lo: src/processor/$(am__dirstamp) \
src/processor/$(DEPDIR)/$(am__dirstamp)
src/processor/source_line_resolver.lo: src/processor/$(am__dirstamp) \
@ -467,6 +502,12 @@ clean-noinstPROGRAMS:
echo " rm -f $$p $$f"; \
rm -f $$p $$f ; \
done
src/processor/crash_report_processor_unittest.$(OBJEXT): \
src/processor/$(am__dirstamp) \
src/processor/$(DEPDIR)/$(am__dirstamp)
src/processor/crash_report_processor_unittest$(EXEEXT): $(src_processor_crash_report_processor_unittest_OBJECTS) $(src_processor_crash_report_processor_unittest_DEPENDENCIES) src/processor/$(am__dirstamp)
@rm -f src/processor/crash_report_processor_unittest$(EXEEXT)
$(CXXLINK) $(src_processor_crash_report_processor_unittest_LDFLAGS) $(src_processor_crash_report_processor_unittest_OBJECTS) $(src_processor_crash_report_processor_unittest_LDADD) $(LIBS)
src/processor/minidump_dump.$(OBJEXT): src/processor/$(am__dirstamp) \
src/processor/$(DEPDIR)/$(am__dirstamp)
src/processor/minidump_dump$(EXEEXT): $(src_processor_minidump_dump_OBJECTS) $(src_processor_minidump_dump_DEPENDENCIES) src/processor/$(am__dirstamp)
@ -493,6 +534,9 @@ src/processor/source_line_resolver_unittest$(EXEEXT): $(src_processor_source_lin
mostlyclean-compile:
-rm -f *.$(OBJEXT)
-rm -f src/processor/crash_report_processor.$(OBJEXT)
-rm -f src/processor/crash_report_processor.lo
-rm -f src/processor/crash_report_processor_unittest.$(OBJEXT)
-rm -f src/processor/minidump.$(OBJEXT)
-rm -f src/processor/minidump.lo
-rm -f src/processor/minidump_dump.$(OBJEXT)
@ -509,6 +553,8 @@ mostlyclean-compile:
distclean-compile:
-rm -f *.tab.c
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/crash_report_processor.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/crash_report_processor_unittest.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/minidump.Plo@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/minidump_dump.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@src/processor/$(DEPDIR)/minidump_stackwalk.Po@am__quote@

1621
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5052
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44
src/google/crash_report_processor.h Normal file
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@ -0,0 +1,44 @@
// Copyright (C) 2006 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef GOOGLE_CRASH_REPORT_PROCESSOR_H__
#define GOOGLE_CRASH_REPORT_PROCESSOR_H__
#include <string>
namespace google_airbag {
using std::string;
struct CrashReport;
class SymbolSupplier;
class CrashReportProcessor {
public:
// Initializes this CrashReportProcessor. supplier should be an
// implementation of the SymbolSupplier abstract base class.
CrashReportProcessor(SymbolSupplier *supplier);
~CrashReportProcessor();
// Fills in the stack and other derived data for the CrashReport,
// using the supplied minidump file. Returns true on success.
bool ProcessReport(CrashReport *report, const string &minidump_file);
private:
SymbolSupplier *supplier_;
};
} // namespace google_airbag
#endif // GOOGLE_CRASH_REPORT_PROCESSOR_H__

41
src/google/symbol_supplier.h Normal file
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@ -0,0 +1,41 @@
// Copyright (C) 2006 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// The caller may implement the SymbolSupplier abstract base class
// to provide symbols for a given module.
#ifndef GOOGLE_SYMBOL_SUPPLIER_H__
#define GOOGLE_SYMBOL_SUPPLIER_H__
#include <string>
namespace google_airbag {
using std::string;
class MinidumpModule;
struct CrashReport;
class SymbolSupplier {
public:
virtual ~SymbolSupplier() {}
// Returns the path to the symbol file for the given module.
// report will be the pointer supplied to ProcessReport().
virtual string GetSymbolFile(MinidumpModule *module,
const CrashReport *report) = 0;
};
} // namespace google_airbag
#endif // GOOGLE_SYMBOL_SUPPLIER_H__

72
src/processor/crash_report_processor.cc Normal file
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@ -0,0 +1,72 @@
// Copyright (C) 2006 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "google/crash_report.h"
#include "google/crash_report_processor.h"
#include "processor/minidump.h"
#include "processor/stackwalker_x86.h"
namespace google_airbag {
CrashReportProcessor::CrashReportProcessor(SymbolSupplier *supplier)
: supplier_(supplier) {
}
CrashReportProcessor::~CrashReportProcessor() {
}
bool CrashReportProcessor::ProcessReport(CrashReport *report,
const string &minidump_file) {
int fd = open(minidump_file.c_str(), O_RDONLY);
if (fd == -1) {
return false;
}
Minidump dump(fd);
if (!dump.Read()) {
return false;
}
MinidumpException *exception = dump.GetException();
if (!exception) {
return false;
}
MinidumpThreadList *threads = dump.GetThreadList();
if (!threads) {
return false;
}
// TODO(bryner): get all the threads
MinidumpThread *thread = threads->GetThreadByID(exception->GetThreadID());
if (!thread) {
return false;
}
MinidumpMemoryRegion *thread_memory = thread->GetMemory();
if (!thread_memory) {
return false;
}
// TODO(bryner): figure out which StackWalker we want
StackwalkerX86 walker(exception->GetContext(), thread_memory,
dump.GetModuleList(), supplier_, report);
walker.Walk(&report->stack_frames);
return true;
}
} // namespace google_airbag

107
src/processor/crash_report_processor_unittest.cc Normal file
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@ -0,0 +1,107 @@
// Copyright (C) 2006 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Unit test for CrashReporter. Uses a pre-generated minidump and
// corresponding symbol file, and checks the contents of the CrashReport.
#include <string>
#include "google/crash_report.h"
#include "google/crash_report_processor.h"
#include "google/symbol_supplier.h"
#include "processor/minidump.h"
using std::string;
using google_airbag::CrashReportProcessor;
using google_airbag::CrashReport;
#define ASSERT_TRUE(cond) \
if (!(cond)) { \
fprintf(stderr, "FAILED: %s at %s:%d\n", #cond, __FILE__, __LINE__); \
return false; \
}
#define ASSERT_EQ(e1, e2) ASSERT_TRUE((e1) == (e2))
namespace google_airbag {
class TestSymbolSupplier : public SymbolSupplier {
public:
virtual string GetSymbolFile(MinidumpModule *module,
const CrashReport *report);
};
string TestSymbolSupplier::GetSymbolFile(MinidumpModule *module,
const CrashReport *report) {
if (*(module->GetName()) == "c:\\test_app.exe") {
return string(getenv("srcdir") ? getenv("srcdir") : ".") +
"/src/processor/testdata/minidump2.sym";
}
return "";
}
} // namespace google_airbag
using google_airbag::TestSymbolSupplier;
static bool RunTests() {
TestSymbolSupplier supplier;
CrashReportProcessor processor(&supplier);
CrashReport report;
string minidump_file = string(getenv("srcdir") ? getenv("srcdir") : ".") +
"/src/processor/testdata/minidump2.dmp";
ASSERT_TRUE(processor.ProcessReport(&report, minidump_file));
ASSERT_EQ(report.stack_frames.size(), 4);
ASSERT_EQ(report.stack_frames[0].module_base, 0x400000);
ASSERT_EQ(report.stack_frames[0].module_name, "c:\\test_app.exe");
ASSERT_EQ(report.stack_frames[0].function_name, "CrashFunction");
ASSERT_EQ(report.stack_frames[0].source_file_name, "c:\\test_app.cc");
ASSERT_EQ(report.stack_frames[0].source_line, 36);
ASSERT_EQ(report.stack_frames[1].module_base, 0x400000);
ASSERT_EQ(report.stack_frames[1].module_name, "c:\\test_app.exe");
ASSERT_EQ(report.stack_frames[1].function_name, "main");
ASSERT_EQ(report.stack_frames[1].source_file_name, "c:\\test_app.cc");
ASSERT_EQ(report.stack_frames[1].source_line, 42);
// This comes from the CRT
ASSERT_EQ(report.stack_frames[2].module_base, 0x400000);
ASSERT_EQ(report.stack_frames[2].module_name, "c:\\test_app.exe");
ASSERT_EQ(report.stack_frames[2].function_name, "__tmainCRTStartup");
ASSERT_EQ(report.stack_frames[2].source_file_name,
"f:\\rtm\\vctools\\crt_bld\\self_x86\\crt\\src\\crt0.c");
ASSERT_EQ(report.stack_frames[2].source_line, 318);
// No debug info available for kernel32.dll
ASSERT_EQ(report.stack_frames[3].module_base, 0x7c800000);
ASSERT_EQ(report.stack_frames[3].module_name,
"C:\\WINDOWS\\system32\\kernel32.dll");
ASSERT_TRUE(report.stack_frames[3].function_name.empty());
ASSERT_TRUE(report.stack_frames[3].source_file_name.empty());
ASSERT_EQ(report.stack_frames[3].source_line, 0);
return true;
}
int main(int argc, char *argv[]) {
if (!RunTests()) {
return 1;
}
return 0;
}

17
src/processor/minidump_stackwalk.cc
View file

@ -30,13 +30,10 @@
#define open _open
#endif // !_WIN32
#include <memory>
#include "processor/minidump.h"
#include "processor/stackwalker_x86.h"
using std::auto_ptr;
using namespace google_airbag;
@ -95,17 +92,15 @@ int main(int argc, char** argv) {
exit(1);
}
StackwalkerX86 stackwalker = StackwalkerX86(context, stack_memory, modules);
StackwalkerX86 stackwalker = StackwalkerX86(context, stack_memory,
modules, NULL, NULL);
auto_ptr<StackFrames> stack(stackwalker.Walk());
if (!stack.get()) {
fprintf(stderr, "stackwalker->Walk() failed\n");
exit(1);
}
StackFrames stack;
stackwalker.Walk(&stack);
unsigned int index;
for (index = 0 ; index < stack->size() ; index++) {
StackFrame frame = stack->at(index);
for (index = 0 ; index < stack.size() ; index++) {
StackFrame frame = stack.at(index);
printf("[%2d] ebp = 0x%08llx eip = 0x%08llx \"%s\" + 0x%08llx\n",
index,
frame.frame_pointer,

2
src/processor/source_line_resolver.cc
View file

@ -145,7 +145,7 @@ bool SourceLineResolver::LoadModule(const string &module_name,
void SourceLineResolver::FillSourceLineInfo(StackFrame *frame) const {
ModuleMap::const_iterator it = modules_->find(frame->module_name);
if (it != modules_->end()) {
it->second->LookupAddress(frame->instruction, frame);
it->second->LookupAddress(frame->instruction - frame->module_base, frame);
}
}

25
src/processor/stackwalker.cc
View file

@ -23,6 +23,8 @@
#include "processor/stackwalker.h"
#include "processor/minidump.h"
#include "processor/source_line_resolver.h"
#include "google/symbol_supplier.h"
namespace google_airbag {
@ -31,13 +33,19 @@ namespace google_airbag {
using std::auto_ptr;
Stackwalker::Stackwalker(MemoryRegion* memory, MinidumpModuleList* modules)
: memory_(memory), modules_(modules) {
Stackwalker::Stackwalker(MemoryRegion* memory, MinidumpModuleList* modules,
SymbolSupplier *supplier, const CrashReport *report)
: memory_(memory),
modules_(modules),
supplier_(supplier),
report_(report) {
}
StackFrames* Stackwalker::Walk() {
auto_ptr<StackFrames> frames(new StackFrames());
void Stackwalker::Walk(StackFrames *frames) {
frames->clear();
bool resolve_symbols = (modules_ && supplier_);
SourceLineResolver resolver;
// Begin with the context frame, and keep getting callers until there are
// no more.
@ -56,6 +64,13 @@ StackFrames* Stackwalker::Walk() {
if (module) {
frame->module_name = *(module->GetName());
frame->module_base = module->base_address();
if (resolve_symbols) {
string symbol_file = supplier_->GetSymbolFile(module, report_);
if (!symbol_file.empty()) {
resolver.LoadModule(*(module->GetName()), symbol_file);
}
resolver.FillSourceLineInfo(frame.get());
}
}
}
@ -70,8 +85,6 @@ StackFrames* Stackwalker::Walk() {
// Get the next frame.
valid = GetCallerFrame(frame.get());
}
return frames.release();
}

25
src/processor/stackwalker.h
View file

@ -36,24 +36,31 @@ namespace google_airbag {
class MinidumpModuleList;
class SymbolSupplier;
struct CrashReport;
class Stackwalker {
public:
virtual ~Stackwalker() {}
// Produces a vector of StackFrames by calling GetContextFrame and
// Fills the given vector of StackFrames by calling GetContextFrame and
// GetCallerFrame, and populating the returned frames with module
// offset and name information if possible. The caller takes ownership
// of the StackFrames object and is responsible for freeing it.
StackFrames* Walk();
// offset and name information if possible.
void Walk(StackFrames *frames);
protected:
// memory identifies a MemoryRegion that provides the stack memory
// for the stack to walk. modules, if non-NULL, is a MinidumpModuleList
// that is used to look up which code module each stack frame is
// associated with.
Stackwalker(MemoryRegion* memory, MinidumpModuleList* modules);
// associated with. supplier is an optional caller-supplied SymbolSupplier
// implementation. If supplier is NULL, source line info will not be
// resolved. The CrashReport object will be passed to the SymbolSupplier's
// GetSymbolFile method.
Stackwalker(MemoryRegion* memory,
MinidumpModuleList* modules,
SymbolSupplier* supplier,
const CrashReport* report);
// The stack memory to walk. Subclasses will require this region to
// get information from the stack.
@ -74,6 +81,12 @@ class Stackwalker {
// A list of modules, for populating each StackFrame's module information.
// This field is optional and may be NULL.
MinidumpModuleList* modules_;
// The optional SymbolSupplier for resolving source line info.
SymbolSupplier* supplier_;
// The CrashReport object which is passed to the SymbolSupplier. May be null.
const CrashReport* report_;
};

6
src/processor/stackwalker_x86.cc
View file

@ -28,8 +28,10 @@ namespace google_airbag {
StackwalkerX86::StackwalkerX86(MinidumpContext* context,
MemoryRegion* memory,
MinidumpModuleList* modules)
: Stackwalker(memory, modules),
MinidumpModuleList* modules,
SymbolSupplier* supplier,
const CrashReport* report)
: Stackwalker(memory, modules, supplier, report),
last_frame_pointer_(0) {
if (memory_->GetBase() + memory_->GetSize() - 1 > 0xffffffff) {
// The x86 is a 32-bit CPU, the limits of the supplied stack are invalid.

6
src/processor/stackwalker_x86.h
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@ -40,11 +40,13 @@ class StackwalkerX86 : public Stackwalker {
public:
// context is a MinidumpContext object that gives access to x86-specific
// register state corresponding to the innermost called frame to be
// included in the stack. memory and modules are passed directly through
// included in the stack. The other arguments are passed directly through
// to the base Stackwalker constructor.
StackwalkerX86(MinidumpContext* context,
MemoryRegion* memory,
MinidumpModuleList* modules);
MinidumpModuleList* modules,
SymbolSupplier* supplier,
const CrashReport* report);
private:
// Implementation of Stackwalker, using x86 context (%ebp, %eip) and

BIN
src/processor/testdata/minidump2.dmp vendored Executable file
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10686
src/processor/testdata/minidump2.sym vendored Executable file
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45
src/processor/testdata/test_app.cc vendored Normal file
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@ -0,0 +1,45 @@
// This file is used to generate minidump2.dmp and minidump2.sym.
// cl /Zi /Fetest_app.exe test_app.cc dbghelp.lib
// Then run test_app to generate a dump, and dump_syms to create the .sym file.
#include <windows.h>
#include <dbghelp.h>
static LONG HandleException(EXCEPTION_POINTERS *exinfo) {
HANDLE dump_file = CreateFile("dump.dmp",
GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL);
MINIDUMP_EXCEPTION_INFORMATION except_info;
except_info.ThreadId = GetCurrentThreadId();
except_info.ExceptionPointers = exinfo;
except_info.ClientPointers = false;
MiniDumpWriteDump(GetCurrentProcess(),
GetCurrentProcessId(),
dump_file,
MiniDumpNormal,
&except_info,
NULL,
NULL);
CloseHandle(dump_file);
return EXCEPTION_EXECUTE_HANDLER;
}
void CrashFunction() {
int *i = NULL;
*i = 5; // crash!
}
int main(int argc, char *argv[]) {
__try {
CrashFunction();
} __except(HandleException(GetExceptionInformation())) {
}
return 0;
}