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Batch addr2line calls per 1024 addresses and escape paths

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addr2line starts failing when given too many addresses to resolve.
Batching per 1024 addresses allows not only to see progress but also fixes resolution for images with high number of addresses to resolve.
Escaping is also required when image paths have spaces for example.
This commit is contained in:
Clément Grégoire 2025-04-14 15:36:18 +02:00
parent 9074461ffb
commit f02c6fe4d5
1 changed files with 82 additions and 37 deletions
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119
update/src/OfflineSymbolResolverAddr2Line.cpp
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@ -44,57 +44,102 @@ public:
}
}
static void escapeShellParam(std::string const& s, std::string& out)
{
out.reserve( s.size() + 2 );
out.push_back( '"' );
for( unsigned char c : s )
{
if( ' ' <= c and c <= '~' and c != '\\' and c != '"' )
{
out.push_back( c );
}
else
{
out.push_back( '\\' );
switch( c )
{
case '"': out.push_back( '"' ); break;
case '\\': out.push_back( '\\' ); break;
case '\t': out.push_back( 't' ); break;
case '\r': out.push_back( 'r' ); break;
case '\n': out.push_back( 'n' ); break;
default:
char const* const hexdig = "0123456789ABCDEF";
out.push_back( 'x' );
out.push_back( hexdig[c >> 4] );
out.push_back( hexdig[c & 0xF] );
}
}
}
out.push_back( '"' );
}
bool ResolveSymbols( const std::string& imagePath, const FrameEntryList& inputEntryList,
SymbolEntryList& resolvedEntries )
{
if (!m_addr2LinePath.length()) return false;
if( !m_addr2LinePath.length() ) return false;
std:: string escapedPath;
escapeShellParam( imagePath, escapedPath );
// generate a single addr2line cmd line for all addresses in one invocation
std::stringstream ss;
ss << m_addr2LinePath << " -C -f -e " << imagePath << " -a ";
for ( const FrameEntry& entry : inputEntryList )
size_t entryIdx = 0;
while( entryIdx < inputEntryList.size() )
{
ss << " 0x" << std::hex << entry.symbolOffset;
}
const size_t startIdx = entryIdx;
const size_t batchEndIdx = std::min( inputEntryList.size(), startIdx + (size_t)1024 );
std::string resultStr = ExecShellCommand( ss.str().c_str() );
std::stringstream result(resultStr);
//printf("executing: '%s' got '%s'\n", ss.str().c_str(), result.str().c_str());
printf( "Resolving symbols [%zu-%zu[\n", startIdx, batchEndIdx );
// The output is 2 lines per entry with the following contents:
// hex_address_of_symbol
// symbol_name
// file:line
for( size_t i = 0; i < inputEntryList.size(); ++i )
{
const FrameEntry& inputEntry = inputEntryList[i];
SymbolEntry newEntry;
std::string addr;
std::getline( result, addr );
std::getline( result, newEntry.name );
if (newEntry.name == "??")
// generate a single addr2line cmd line for all addresses in one invocation
std::stringstream ss;
ss << m_addr2LinePath << " -C -f -e " << escapedPath << " -a ";
for( ; entryIdx < batchEndIdx; entryIdx++ )
{
newEntry.name = "[unknown] + " + std::to_string(inputEntry.symbolOffset);
const FrameEntry& entry = inputEntryList[entryIdx];
ss << " 0x" << std::hex << entry.symbolOffset;
}
std::string fileLine;
std::getline(result, fileLine);
if ( fileLine != "??:?" )
std::string resultStr = ExecShellCommand( ss.str().c_str() );
std::stringstream result( resultStr );
//printf("executing: '%s' got '%s'\n", ss.str().c_str(), result.str().c_str());
// The output is 2 lines per entry with the following contents:
// hex_address_of_symbol
// symbol_name
// file:line
for( size_t i = startIdx ;i < batchEndIdx; i++ )
{
size_t pos = fileLine.find_last_of(':');
if ( pos != std::string::npos )
const FrameEntry& inputEntry = inputEntryList[i];
SymbolEntry newEntry;
std::string addr;
std::getline( result, addr );
std::getline( result, newEntry.name );
if( newEntry.name == "??" )
{
newEntry.file = fileLine.substr( 0, pos );
std::string lineStr = fileLine.substr( pos + 1 );
char* after = nullptr;
newEntry.line = strtol( lineStr.c_str(), &after, 10 );
newEntry.name = "[unknown] + " + std::to_string( inputEntry.symbolOffset );
}
}
resolvedEntries.push_back( std::move(newEntry) );
std::string fileLine;
std::getline( result, fileLine );
if( fileLine != "??:?" )
{
size_t pos = fileLine.find_last_of( ':' );
if( pos != std::string::npos )
{
newEntry.file = fileLine.substr( 0, pos );
std::string lineStr = fileLine.substr( pos + 1 );
char* after = nullptr;
newEntry.line = strtol( lineStr.c_str(), &after, 10 );
}
}
resolvedEntries.push_back( std::move( newEntry ) );
}
}
return true;