third_party/tcmalloc/vendor/src/stacktrace.cc

   1 // Copyright (c) 2005, Google Inc.
   2 // All rights reserved.
   3 //
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   5 // modification, are permitted provided that the following conditions are
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  10 //     * Redistributions in binary form must reproduce the above
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  28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29
  30 // ---
  31 // Author: Sanjay Ghemawat
  32 //
  33 // Produce stack trace.
  34 //
  35 // There are three different ways we can try to get the stack trace:
  36 //
  37 // 1) Our hand-coded stack-unwinder.  This depends on a certain stack
  38 //    layout, which is used by gcc (and those systems using a
  39 //    gcc-compatible ABI) on x86 systems, at least since gcc 2.95.
  40 //    It uses the frame pointer to do its work.
  41 //
  42 // 2) The libunwind library.  This is still in development, and as a
  43 //    separate library adds a new dependency, abut doesn't need a frame
  44 //    pointer.  It also doesn't call malloc.
  45 //
  46 // 3) The gdb unwinder -- also the one used by the c++ exception code.
  47 //    It's obviously well-tested, but has a fatal flaw: it can call
  48 //    malloc() from the unwinder.  This is a problem because we're
  49 //    trying to use the unwinder to instrument malloc().
  50 //
  51 // Note: if you add a new implementation here, make sure it works
  52 // correctly when GetStackTrace() is called with max_depth == 0.
  53 // Some code may do that.
  54
  55 #include <config.h>
  56 #include <gperftools/stacktrace.h>
  57 #include "stacktrace_config.h"
  58
  59 #if defined(STACKTRACE_INL_HEADER)
  60
  61 #define IS_STACK_FRAMES 0
  62 #define IS_WITH_CONTEXT 0
  63 #define GET_STACK_TRACE_OR_FRAMES \
  64    GetStackTrace(void **result, int max_depth, int skip_count)
  65 #include STACKTRACE_INL_HEADER
  66 #undef IS_STACK_FRAMES
  67 #undef IS_WITH_CONTEXT
  68 #undef GET_STACK_TRACE_OR_FRAMES
  69
  70 #define IS_STACK_FRAMES 1
  71 #define IS_WITH_CONTEXT 0
  72 #define GET_STACK_TRACE_OR_FRAMES \
  73   GetStackFrames(void **result, int *sizes, int max_depth, int skip_count)
  74 #include STACKTRACE_INL_HEADER
  75 #undef IS_STACK_FRAMES
  76 #undef IS_WITH_CONTEXT
  77 #undef GET_STACK_TRACE_OR_FRAMES
  78
  79 #define IS_STACK_FRAMES 0
  80 #define IS_WITH_CONTEXT 1
  81 #define GET_STACK_TRACE_OR_FRAMES \
  82   GetStackTraceWithContext(void **result, int max_depth, \
  83                            int skip_count, const void *ucp)
  84 #include STACKTRACE_INL_HEADER
  85 #undef IS_STACK_FRAMES
  86 #undef IS_WITH_CONTEXT
  87 #undef GET_STACK_TRACE_OR_FRAMES
  88
  89 #define IS_STACK_FRAMES 1
  90 #define IS_WITH_CONTEXT 1
  91 #define GET_STACK_TRACE_OR_FRAMES \
  92   GetStackFramesWithContext(void **result, int *sizes, int max_depth, \
  93                             int skip_count, const void *ucp)
  94 #include STACKTRACE_INL_HEADER
  95 #undef IS_STACK_FRAMES
  96 #undef IS_WITH_CONTEXT
  97 #undef GET_STACK_TRACE_OR_FRAMES
  98
  99 #elif 0
 100 // This is for the benefit of code analysis tools that may have
 101 // trouble with the computed #include above.
 102 # include "stacktrace_x86-inl.h"
 103 # include "stacktrace_libunwind-inl.h"
 104 # include "stacktrace_generic-inl.h"
 105 # include "stacktrace_powerpc-inl.h"
 106 # include "stacktrace_win32-inl.h"
 107 # include "stacktrace_arm-inl.h"
 108 #else
 109 # error Cannot calculate stack trace: will need to write for your environment
 110 #endif