Function CallstackDataCb

Source/ThirdParty/tracy/client/TracyCallstack.cpp:1147–1217

}

static int CallstackDataCb( void* /*data*/, uintptr_t pc, uintptr_t lowaddr, const char* fn, int lineno, const char* function )
{
    cb_data[cb_num].symLen = 0;
    cb_data[cb_num].symAddr = (uint64_t)lowaddr;

    if( !fn && !function )
    {
        const char* symname = nullptr;
        auto vptr = (void*)pc;
        ptrdiff_t symoff = 0;

        Dl_info dlinfo;
        if( dladdr( vptr, &dlinfo ) )
        {
            symname = dlinfo.dli_sname;
            symoff = (char*)pc - (char*)dlinfo.dli_saddr;
            const char* demangled = ___tracy_demangle( symname );
            if( demangled ) symname = demangled;
        }

        if( !symname ) symname = "[unknown]";

        if( symoff == 0 )
        {
            const auto len = std::min<size_t>( strlen( symname ), std::numeric_limits<uint16_t>::max() );
            cb_data[cb_num].name = CopyStringFast( symname, len );
        }
        else
        {
            char buf[32];
            const auto offlen = sprintf( buf, " + %td", symoff );
            const auto namelen = std::min<size_t>( strlen( symname ), std::numeric_limits<uint16_t>::max() - offlen );
            auto name = (char*)tracy_malloc_fast( namelen + offlen + 1 );
            memcpy( name, symname, namelen );
            memcpy( name + namelen, buf, offlen );
            name[namelen + offlen] = '\0';
            cb_data[cb_num].name = name;
        }

        cb_data[cb_num].file = CopyStringFast( "[unknown]" );
        cb_data[cb_num].line = 0;
    }
    else
    {
        if( !fn ) fn = "[unknown]";
        if( !function )
        {
            function = "[unknown]";
        }
        else
        {
            const char* demangled = ___tracy_demangle( function );
            if( demangled ) function = demangled;
        }

        const auto len = std::min<size_t>( strlen( function ), std::numeric_limits<uint16_t>::max() );
        cb_data[cb_num].name = CopyStringFast( function, len );
        cb_data[cb_num].file = NormalizePath( fn );