1 // Copyright (c) 2005, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 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 111