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author | xiaoyur347 <xiaoyur347@gmail.com> | 2013-12-20 09:41:08 +0800 |
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committer | xiaoyur347 <xiaoyur347@gmail.com> | 2013-12-20 09:41:08 +0800 |
commit | a15115271cc475509b17bf7fecbe1ac4966baf2e (patch) | |
tree | f824337088a8ad46570a007f3100482c727181d5 | |
parent | 7c4888515ed93347d4793fc066cd6048e519a197 (diff) | |
download | gperftools-a15115271cc475509b17bf7fecbe1ac4966baf2e.tar.gz |
add "-finstrument-functions" support for MIPS uclibc.
should configure with CXXFLAGS="-finstrument-functions"
-rwxr-xr-x[-rw-r--r--] | src/stacktrace_config.h | 11 | ||||
-rwxr-xr-x | src/stacktrace_instrument-inl.h | 155 |
2 files changed, 164 insertions, 2 deletions
diff --git a/src/stacktrace_config.h b/src/stacktrace_config.h index dfb203e..8b0fc32 100644..100755 --- a/src/stacktrace_config.h +++ b/src/stacktrace_config.h @@ -47,6 +47,10 @@ #ifndef BASE_STACKTRACE_CONFIG_H_ #define BASE_STACKTRACE_CONFIG_H_ +#ifdef HAVE_FEATURES_H +#include <features.h> // for __UCLIBC__ +#endif + // First, the i386 and x86_64 case. #if (defined(__i386__) || defined(__x86_64__)) && __GNUC__ >= 2 # if !defined(NO_FRAME_POINTER) @@ -79,8 +83,11 @@ // The MIPS case #elif defined(__mips__) && __GNUC__ >= 2 -# define STACKTRACE_INL_HEADER "stacktrace_generic-inl.h" - +# if defined(__UCLIBC__) +# define STACKTRACE_INL_HEADER "stacktrace_instrument-inl.h" +# else +# define STACKTRACE_INL_HEADER "stacktrace_generic-inl.h" +# endif // The Windows case -- probably cygwin and mingw will use one of the // x86-includes above, but if not, we can fall back to windows intrinsics. #elif defined(_WIN32) || defined(__CYGWIN__) || defined(__CYGWIN32__) || defined(__MINGW32__) diff --git a/src/stacktrace_instrument-inl.h b/src/stacktrace_instrument-inl.h new file mode 100755 index 0000000..c99c4de --- /dev/null +++ b/src/stacktrace_instrument-inl.h @@ -0,0 +1,155 @@ +// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- +// Copyright (c) 2013, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// --- +// Author: Jean Lee <xiaoyur347@gmail.com> +// based on gcc Code-Gen-Options "-finstrument-functions" listed in +// http://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html . +// Should run configure with CXXFLAGS="-finstrument-functions". + +// This file is a backtrace implementation for systems : +// * The glibc implementation of backtrace() may cause a call to malloc, +// and cause a deadlock in HeapProfiler. +// * The libunwind implementation prints no backtrace. + +// The backtrace arrays are stored in "thread_back_trace" variable. +// Maybe to use thread local storage is better and should save memorys. + +#ifndef BASE_STACKTRACE_INSTRUMENT_INL_H_ +#define BASE_STACKTRACE_INSTRUMENT_INL_H_ +// Note: this file is included into stacktrace.cc more than once. +// Anything that should only be defined once should be here: + +#include <execinfo.h> +#include <string.h> +#include <unistd.h> +#include <sys/syscall.h> +#include "gperftools/stacktrace.h" + +#define gettid() syscall(__NR_gettid) +#ifndef __x86_64__ +#define MAX_THREAD (32768) +#else +#define MAX_THREAD (65536) +#endif +#define MAX_DEPTH (30) +#define ATTRIBUTE_NOINSTRUMENT __attribute__ ((no_instrument_function)) + +typedef struct { + int stack_depth; + void* frame[MAX_DEPTH]; +}BACK_TRACE; + +static BACK_TRACE thread_back_trace[MAX_THREAD]; +extern "C" { +void __cyg_profile_func_enter(void *func_address, + void *call_site) ATTRIBUTE_NOINSTRUMENT; +void __cyg_profile_func_enter(void *func_address, void *call_site) { + (void)func_address; + + BACK_TRACE* backtrace = thread_back_trace + gettid(); + int stack_depth = backtrace->stack_depth; + backtrace->stack_depth = stack_depth + 1; + if ( stack_depth >= MAX_DEPTH ) { + return; + } + backtrace->frame[stack_depth] = call_site; +} + +void __cyg_profile_func_exit(void *func_address, + void *call_site) ATTRIBUTE_NOINSTRUMENT; +void __cyg_profile_func_exit(void *func_address, void *call_site) { + (void)func_address; + (void)call_site; + + BACK_TRACE* backtrace = thread_back_trace + gettid(); + int stack_depth = backtrace->stack_depth; + backtrace->stack_depth = stack_depth - 1; + if ( stack_depth >= MAX_DEPTH ) { + return; + } + backtrace->frame[stack_depth] = 0; +} +} // extern "C" + +static int cyg_backtrace(void **buffer, int size) { + BACK_TRACE* backtrace = thread_back_trace + gettid(); + int stack_depth = backtrace->stack_depth; + if ( stack_depth >= MAX_DEPTH ) { + stack_depth = MAX_DEPTH; + } + int nSize = (size > stack_depth) ? stack_depth : size; + for (int i = 0; i < nSize; i++) { + buffer[i] = backtrace->frame[nSize - i - 1]; + } + + return nSize; +} + +#endif // BASE_STACKTRACE_INSTRUMENT_INL_H_ + + +// Note: this part of the file is included several times. +// Do not put globals below. + +// The following 4 functions are generated from the code below: +// GetStack{Trace,Frames}() +// GetStack{Trace,Frames}WithContext() +// +// These functions take the following args: +// void** result: the stack-trace, as an array +// int* sizes: the size of each stack frame, as an array +// (GetStackFrames* only) +// int max_depth: the size of the result (and sizes) array(s) +// int skip_count: how many stack pointers to skip before storing in result +// void* ucp: a ucontext_t* (GetStack{Trace,Frames}WithContext only) +int GET_STACK_TRACE_OR_FRAMES { + static const int kStackLength = 64; + void * stack[kStackLength]; + int size; + memset(stack, 0, sizeof(stack)); + + size = cyg_backtrace(stack, kStackLength); + skip_count++; // we want to skip the current frame as well + int result_count = size - skip_count; + if (result_count < 0) + result_count = 0; + if (result_count > max_depth) + result_count = max_depth; + for (int i = 0; i < result_count; i++) + result[i] = stack[i + skip_count]; + +#if IS_STACK_FRAMES + // No implementation for finding out the stack frame sizes yet. + memset(sizes, 0, sizeof(*sizes) * result_count); +#endif + + return result_count; +} |