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// Copyright (c) 2006, 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.
#include <sys/stat.h>
#include <map>
#include <string>
#include "google_airbag/processor/basic_source_line_resolver.h"
#include "google_airbag/processor/minidump.h"
#include "processor/pathname_stripper.h"
#include "on_demand_symbol_supplier.h"
#include "dump_syms.h"
using std::map;
using std::string;
using google_airbag::OnDemandSymbolSupplier;
using google_airbag::PathnameStripper;
using google_airbag::SymbolSupplier;
OnDemandSymbolSupplier::OnDemandSymbolSupplier(const string &architecture,
const string &search_dir)
: architecture_(architecture),
search_dir_(search_dir) {
}
SymbolSupplier::SymbolResult
OnDemandSymbolSupplier::GetSymbolFile(const CodeModule *module,
string *symbol_file) {
string path(GetModuleSymbolFile(module));
if (path.empty()) {
if (!GenerateSymbolFile(module))
return NOT_FOUND;
path = GetModuleSymbolFile(module);
}
if (path.empty())
return NOT_FOUND;
*symbol_file = path;
return FOUND;
}
string OnDemandSymbolSupplier::GetLocalModulePath(const CodeModule *module) {
NSFileManager *mgr = [NSFileManager defaultManager];
const char *moduleStr = module->code_file().c_str();
NSString *modulePath =
[mgr stringWithFileSystemRepresentation:moduleStr length:strlen(moduleStr)];
const char *searchStr = search_dir_.c_str();
NSString *searchDir =
[mgr stringWithFileSystemRepresentation:searchStr length:strlen(searchStr)];
if ([mgr fileExistsAtPath:modulePath])
return module->code_file();
// If the module is not found, try to start appending the components to the
// search string and stop if a file (not dir) is found or all components
// have been appended
NSArray *pathComponents = [modulePath componentsSeparatedByString:@"/"];
int count = [pathComponents count];
NSMutableString *path = [NSMutableString string];
for (int i = 0; i < count; ++i) {
[path setString:searchDir];
for (int j = 0; j < i + 1; ++j) {
int idx = count - 1 - i + j;
[path appendFormat:@"/%@", [pathComponents objectAtIndex:idx]];
}
BOOL isDir;
if ([mgr fileExistsAtPath:path isDirectory:&isDir] && (!isDir)) {
return [path fileSystemRepresentation];
}
}
return "";
}
string OnDemandSymbolSupplier::GetModulePath(const CodeModule *module) {
return module->code_file();
}
string OnDemandSymbolSupplier::GetNameForModule(const CodeModule *module) {
return PathnameStripper::File(module->code_file());
}
string OnDemandSymbolSupplier::GetModuleSymbolFile(const CodeModule *module) {
string name(GetNameForModule(module));
map<string, string>::iterator result = module_file_map_.find(name);
return (result == module_file_map_.end()) ? "" : (*result).second;
}
static float GetFileModificationTime(const char *path) {
float result = 0;
struct stat file_stat;
if (stat(path, &file_stat) == 0)
result = (float)file_stat.st_mtimespec.tv_sec +
(float)file_stat.st_mtimespec.tv_nsec / 1.0e9;
return result;
}
bool OnDemandSymbolSupplier::GenerateSymbolFile(const CodeModule *module) {
bool result = true;
string name = GetNameForModule(module);
string module_path = GetLocalModulePath(module);
NSString *symbol_path = [NSString stringWithFormat:@"/tmp/%s.%s.sym",
name.c_str(), architecture_.c_str()];
if (module_path.empty())
return false;
// Check if there's already a symbol file cached. Ensure that the file is
// newer than the module. Otherwise, generate a new one.
BOOL generate_file = YES;
if ([[NSFileManager defaultManager] fileExistsAtPath:symbol_path]) {
// Check if the module file is newer than the saved symbols
float cache_time =
GetFileModificationTime([symbol_path fileSystemRepresentation]);
float module_time =
GetFileModificationTime(module_path.c_str());
if (cache_time > module_time)
generate_file = NO;
}
if (generate_file) {
NSString *module_str = [[NSFileManager defaultManager]
stringWithFileSystemRepresentation:module_path.c_str()
length:module_path.length()];
DumpSymbols *dump = [[DumpSymbols alloc] initWithContentsOfFile:module_str];
const char *archStr = architecture_.c_str();
if ([dump setArchitecture:[NSString stringWithUTF8String:archStr]]) {
[dump writeSymbolFile:symbol_path];
} else {
printf("Architecture %s not available for %s\n", archStr, name.c_str());
result = false;
}
[dump release];
}
// Add the mapping
if (result)
module_file_map_[name] = [symbol_path fileSystemRepresentation];
return result;
}
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