Home | History | Annotate | Line # | Download | only in lsan 
      1 //=-- lsan.h --------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file is a part of LeakSanitizer.
     11 // Private header for standalone LSan RTL.
     12 //
     13 //===----------------------------------------------------------------------===//
     14 
     15 #include "lsan_thread.h"
     16 #include "sanitizer_common/sanitizer_flags.h"
     17 #include "sanitizer_common/sanitizer_stacktrace.h"
     18 
     19 #define GET_STACK_TRACE(max_size, fast)                       \
     20   __sanitizer::BufferedStackTrace stack;                      \
     21   GetStackTrace(&stack, max_size, StackTrace::GetCurrentPc(), \
     22                 GET_CURRENT_FRAME(), nullptr, fast);
     23 
     24 #define GET_STACK_TRACE_FATAL \
     25   GET_STACK_TRACE(kStackTraceMax, common_flags()->fast_unwind_on_fatal)
     26 
     27 #define GET_STACK_TRACE_MALLOC                                      \
     28   GET_STACK_TRACE(__sanitizer::common_flags()->malloc_context_size, \
     29                   common_flags()->fast_unwind_on_malloc)
     30 
     31 #define GET_STACK_TRACE_THREAD GET_STACK_TRACE(kStackTraceMax, true)
     32 
     33 namespace __lsan {
     34 
     35 void InitializeInterceptors();
     36 void ReplaceSystemMalloc();
     37 
     38 #define ENSURE_LSAN_INITED do {   \
     39   CHECK(!lsan_init_is_running);   \
     40   if (!lsan_inited)               \
     41     __lsan_init();                \
     42 } while (0)
     43 
     44 // Get the stack trace with the given pc and bp.
     45 // The pc will be in the position 0 of the resulting stack trace.
     46 // The bp may refer to the current frame or to the caller's frame.
     47 ALWAYS_INLINE
     48 void GetStackTrace(__sanitizer::BufferedStackTrace *stack,
     49                    __sanitizer::uptr max_depth, __sanitizer::uptr pc,
     50                    __sanitizer::uptr bp, void *context, bool fast) {
     51   uptr stack_top = 0, stack_bottom = 0;
     52   ThreadContext *t;
     53   if (fast && (t = CurrentThreadContext())) {
     54     stack_top = t->stack_end();
     55     stack_bottom = t->stack_begin();
     56   }
     57   if (!SANITIZER_MIPS || IsValidFrame(bp, stack_top, stack_bottom)) {
     58     stack->Unwind(max_depth, pc, bp, context, stack_top, stack_bottom, fast);
     59   }
     60 }
     61 
     62 }  // namespace __lsan
     63 
     64 extern bool lsan_inited;
     65 extern bool lsan_init_is_running;
     66 
     67 extern "C" SANITIZER_INTERFACE_ATTRIBUTE void __lsan_init();
     68