compiler-rt/lib/memprof/memprof_stack.h

   1 //===-- memprof_stack.h ----------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file is a part of MemProfiler, a memory profiler.
  10 //
  11 // MemProf-private header for memprof_stack.cpp.
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef MEMPROF_STACK_H
  15 #define MEMPROF_STACK_H
  16
  17 #include "memprof_flags.h"
  18 #include "memprof_thread.h"
  19 #include "sanitizer_common/sanitizer_flags.h"
  20 #include "sanitizer_common/sanitizer_stacktrace.h"
  21
  22 namespace __memprof {
  23
  24 static const u32 kDefaultMallocContextSize = 30;
  25
  26 void SetMallocContextSize(u32 size);
  27 u32 GetMallocContextSize();
  28
  29 } // namespace __memprof
  30
  31 // NOTE: A Rule of thumb is to retrieve stack trace in the interceptors
  32 // as early as possible (in functions exposed to the user), as we generally
  33 // don't want stack trace to contain functions from MemProf internals.
  34
  35 #define GET_STACK_TRACE(max_size, fast)                                        \
  36   UNINITIALIZED BufferedStackTrace stack;                                                    \
  37   if (max_size <= 2) {                                                         \
  38     stack.size = max_size;                                                     \
  39     if (max_size > 0) {                                                        \
  40       stack.top_frame_bp = GET_CURRENT_FRAME();                                \
  41       stack.trace_buffer[0] = StackTrace::GetCurrentPc();                      \
  42       if (max_size > 1)                                                        \
  43         stack.trace_buffer[1] = GET_CALLER_PC();                               \
  44     }                                                                          \
  45   } else {                                                                     \
  46     stack.Unwind(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(), nullptr,     \
  47                  fast, max_size);                                              \
  48   }
  49
  50 #define GET_STACK_TRACE_FATAL_HERE                                             \
  51   GET_STACK_TRACE(kStackTraceMax, common_flags()->fast_unwind_on_fatal)
  52
  53 #define GET_STACK_TRACE_THREAD GET_STACK_TRACE(kStackTraceMax, true)
  54
  55 #define GET_STACK_TRACE_MALLOC                                                 \
  56   GET_STACK_TRACE(GetMallocContextSize(), common_flags()->fast_unwind_on_malloc)
  57
  58 #define GET_STACK_TRACE_FREE GET_STACK_TRACE_MALLOC
  59
  60 #define PRINT_CURRENT_STACK()                                                  \
  61   {                                                                            \
  62     GET_STACK_TRACE_FATAL_HERE;                                                \
  63     stack.Print();                                                             \
  64   }
  65
  66 #endif // MEMPROF_STACK_H