2 * Copyright (c) 2017 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <dali/internal/common/mutex-trace.h>
21 #ifdef LOCK_BACKTRACE_ENABLED
27 #include <dali/public-api/common/dali-common.h>
28 #include <dali/integration-api/debug.h>
30 #endif // LOCK_BACKTRACE_ENABLED
33 #include <dali/integration-api/debug.h>
37 #ifdef LOCK_BACKTRACE_ENABLED
38 extern std::string Demangle( const char* symbol );
39 #endif // LOCK_BACKTRACE_ENABLED
49 #ifdef LOCK_BACKTRACE_ENABLED
52 const unsigned int MAX_NUM_STACK_FRAMES = 4;
53 const unsigned int MAX_LOCK_SUPPORT = 5;
57 void * frameArray[ MAX_NUM_STACK_FRAMES ]; ///< Stores the frame array where the lock occurred
58 int size; ///< Number of frames in the frame array (can be less than MAX_NUM_STACK_FRAMES)
61 thread_local BackTraceInfo gBackTraceInfo[ MAX_LOCK_SUPPORT ]; ///< Thread local storage for the backtrace of the locks
63 #endif // LOCK_BACKTRACE_ENABLED
65 thread_local unsigned int gThreadLockCount = 0; ///< Thread local storage for the backtrace of the locks
66 } // unnamed namespace
72 #ifdef LOCK_BACKTRACE_ENABLED
74 if( gThreadLockCount <= MAX_LOCK_SUPPORT )
76 // Store the frame array for this lock
77 int backTraceIndex = gThreadLockCount - 1;
78 gBackTraceInfo[ backTraceIndex ].size = backtrace( gBackTraceInfo[ backTraceIndex ].frameArray, MAX_NUM_STACK_FRAMES );
82 DALI_LOG_ERROR( "Reached Maximum lock backtrace support. Previous Locks:\n" );
85 // If we've got more than one lock, then show a warning with a backtrace for all locks that we currently hold
86 if( gThreadLockCount > 1 )
88 for( unsigned int i = 0; ( i < gThreadLockCount ) && ( i < MAX_LOCK_SUPPORT ); ++i )
90 DALI_LOG_WARNING( "[Lock %d]\n", i+1 );
91 char** symbols = backtrace_symbols( gBackTraceInfo[ i ].frameArray, gBackTraceInfo[ i ].size );
92 for( int j = 1; j < gBackTraceInfo[ i ].size; ++j )
94 std::string demangled_symbol = Demangle( symbols[ j ] );
95 DALI_LOG_WARNING( " [%02d] %s\n", j, demangled_symbol.c_str() );
99 DALI_LOG_WARNING( "====================================\n" );
104 // TODO: Uncomment when locks held per thread at any given time are 1
105 //DALI_ASSERT_DEBUG( gThreadLockCount == 1 );
107 #endif // LOCK_BACKTRACE_ENABLED
115 } // namespace MutexTrace
117 } // namespace Internal