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 // Portable implementation - just use glibc 34 // 35 // Note: The glibc implementation may cause a call to malloc. 36 // This can cause a deadlock in HeapProfiler. 37 38 #ifndef BASE_STACKTRACE_GENERIC_INL_H_ 39 #define BASE_STACKTRACE_GENERIC_INL_H_ 40 // Note: this file is included into stacktrace.cc more than once. 41 // Anything that should only be defined once should be here: 42 43 #include <execinfo.h> 44 #include <string.h> 45 #include "gperftools/stacktrace.h" 46 #endif // BASE_STACKTRACE_GENERIC_INL_H_ 47 48 // Note: this part of the file is included several times. 49 // Do not put globals below. 50 51 // The following 4 functions are generated from the code below: 52 // GetStack{Trace,Frames}() 53 // GetStack{Trace,Frames}WithContext() 54 // 55 // These functions take the following args: 56 // void** result: the stack-trace, as an array 57 // int* sizes: the size of each stack frame, as an array 58 // (GetStackFrames* only) 59 // int max_depth: the size of the result (and sizes) array(s) 60 // int skip_count: how many stack pointers to skip before storing in result 61 // void* ucp: a ucontext_t* (GetStack{Trace,Frames}WithContext only) 62 int GET_STACK_TRACE_OR_FRAMES { 63 static const int kStackLength = 64; 64 void * stack[kStackLength]; 65 int size; 66 67 size = backtrace(stack, kStackLength); 68 skip_count++; // we want to skip the current frame as well 69 int result_count = size - skip_count; 70 if (result_count < 0) 71 result_count = 0; 72 if (result_count > max_depth) 73 result_count = max_depth; 74 for (int i = 0; i < result_count; i++) 75 result[i] = stack[i + skip_count]; 76 77 #if IS_STACK_FRAMES 78 // No implementation for finding out the stack frame sizes yet. 79 memset(sizes, 0, sizeof(*sizes) * result_count); 80 #endif 81 82 return result_count; 83 } 84
