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Android callstack collection using _Unwind_Backtrace().
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@ -69,6 +69,85 @@ CallstackEntry DecodeCallstackPtr( uint64_t ptr )
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return ret;
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}
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#elif defined __ANDROID__
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CallstackEntry DecodeCallstackPtr( uint64_t ptr )
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{
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CallstackEntry ret;
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ret.line = 0;
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char* demangled = nullptr;
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const char* symname = nullptr;
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const char* symloc = nullptr;
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auto vptr = (void*)ptr;
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char** sym = nullptr;
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ptrdiff_t symoff = 0;
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Dl_info dlinfo;
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if( dladdr( vptr, &dlinfo ) )
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{
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symloc = dlinfo.dli_fname;
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symname = dlinfo.dli_sname;
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symoff = (char*)ptr - (char*)dlinfo.dli_saddr;
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if( symname && symname[0] == '_' )
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{
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size_t len = 0;
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int status;
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demangled = abi::__cxa_demangle( symname, nullptr, &len, &status );
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if( status == 0 )
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{
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symname = demangled;
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}
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}
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}
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if( !symname )
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{
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symname = "[unknown]";
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}
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if( !symloc )
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{
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symloc = "[unknown]";
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}
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if( symoff == 0 )
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{
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const auto namelen = strlen( symname );
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auto name = (char*)tracy_malloc( namelen + 1 );
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memcpy( name, symname, namelen );
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name[namelen] = '\0';
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ret.name = name;
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}
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else
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{
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char buf[32];
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sprintf( buf, " + %td", symoff );
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const auto offlen = strlen( buf );
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const auto namelen = strlen( symname );
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auto name = (char*)tracy_malloc( namelen + offlen + 1 );
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memcpy( name, symname, namelen );
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memcpy( name + namelen, buf, offlen );
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name[namelen + offlen] = '\0';
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ret.name = name;
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}
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char buf[32];
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sprintf( buf, " [%p]", (void*)ptr );
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const auto addrlen = strlen( buf );
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const auto loclen = strlen( symloc );
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auto loc = (char*)tracy_malloc( loclen + addrlen + 1 );
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memcpy( loc, symloc, loclen );
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memcpy( loc + loclen, buf, addrlen );
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loc[loclen + addrlen] = '\0';
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ret.file = loc;
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if( sym ) free( sym );
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if( demangled ) free( demangled );
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return ret;
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}
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#elif defined _GNU_SOURCE
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CallstackEntry DecodeCallstackPtr( uint64_t ptr )
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@ -10,6 +10,9 @@ extern "C" __declspec(dllimport) unsigned short __stdcall RtlCaptureStackBackTra
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extern "C" __declspec(dllimport) unsigned short __stdcall RtlCaptureStackBackTrace( unsigned long, unsigned long, void**, unsigned long* );
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# endif
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# endif
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#elif defined __ANDROID__
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# define TRACY_HAS_CALLSTACK
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# include <unwind.h>
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#elif defined _GNU_SOURCE
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# define TRACY_HAS_CALLSTACK
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# include <execinfo.h>
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@ -52,6 +55,41 @@ static tracy_force_inline void* Callstack( int depth )
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return trace;
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}
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#elif defined __ANDROID__
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static tracy_force_inline void InitCallstack() {}
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struct BacktraceState
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{
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void** current;
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void** end;
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};
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static _Unwind_Reason_Code tracy_unwind_callback( struct _Unwind_Context* ctx, void* arg )
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{
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auto state = (BacktraceState*)arg;
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uintptr_t pc = _Unwind_GetIP( ctx );
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if( pc )
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{
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if( state->current == state->end ) return _URC_END_OF_STACK;
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*state->current++ = (void*)pc;
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}
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return _URC_NO_REASON;
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}
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static tracy_force_inline void* Callstack( int depth )
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{
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assert( depth >= 1 && depth < 63 );
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auto trace = (uintptr_t*)tracy_malloc( ( 1 + depth ) * sizeof( uintptr_t ) );
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BacktraceState state = { (void**)(trace+1), (void**)(trace+1+depth) };
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_Unwind_Backtrace( tracy_unwind_callback, &state );
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*trace = (uintptr_t*)state.current - trace + 1;
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return trace;
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}
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#elif defined _GNU_SOURCE
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static tracy_force_inline void InitCallstack() {}
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