d180ed418d
Introduce libunwind get stack trace, cost is negligible and has line numbers. use StackTraceCache, PHDRCache speed up, is customizable and has some optimizations. Other stack trace tools remain: glog, boost, glibc, in case for need. TODO: currently support linux __x86_64__, __arm__, __powerpc__, not supported __FreeBSD__, APPLE Note: __arm__, __powerpc__ not been verified Support signal handle libunwid support unw_backtrace for jemalloc Use of undefined compile option USE_MUSL for later
41 lines
1.9 KiB
C++
41 lines
1.9 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// This file is copied from
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// https://github.com/ClickHouse/ClickHouse/blob/master/src/base/phdr_cache.h
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// and modified by Doris
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#pragma once
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/// This code was based on the code by Fedor Korotkiy https://www.linkedin.com/in/fedor-korotkiy-659a1838/
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/** Collects all dl_phdr_info items and caches them in a static array.
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* Also rewrites dl_iterate_phdr with a lock-free version which consults the above cache
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* thus eliminating scalability bottleneck in C++ exception unwinding.
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* As a drawback, this only works if no dynamic object unloading happens after this point.
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* This function is thread-safe. You should call it to update cache after loading new shared libraries.
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* Otherwise exception handling from dlopened libraries won't work (will call std::terminate immediately).
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* NOTE: dlopen is forbidden in our code.
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*
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* NOTE: It is disabled with Thread Sanitizer because TSan can only use original "dl_iterate_phdr" function.
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*/
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void updatePHDRCache();
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/** Check if "dl_iterate_phdr" will be lock-free
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* to determine if some features like Query Profiler can be used.
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*/
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bool hasPHDRCache();
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