forked from rook/rook
Bassam Tabbara
6e84b161fa
Move external packages including ceph into a separate project under the externals subdir.
37 lines
1.6 KiB
Go
37 lines
1.6 KiB
Go
// +build jemalloc tcmalloc tcmalloc_minimal
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/*
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Copyright 2016 The Rook Authors. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cephd
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// this bit of magic is used to workaround an issue
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// with glibc 2.24 when replacing memory allocators. Jemalloc and tcmalloc
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// both rely on providing implementations of malloc (calloc, free, etc.)
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// so that the linker drops the need for glib's malloc.o and use
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// jemalloc/tcmalloc's implementation instead. However, in glibc 2.24
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// fork() now calls internal functions specific to glib's memory allocator.
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// The functions below provide empty implementations so that the linker
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// continues to drop the need for malloc.o and pickup jemalloc/tcmalloc
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// insead. See https://github.com/jemalloc/jemalloc/issues/442#event-840687583
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// and https://github.com/gperftools/gperftools/issues/856 for more context.
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// Also this was fixed in glibc 2.25 but that is not widely deployed
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// https://sourceware.org/bugzilla/show_bug.cgi?id=20432
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// void __malloc_fork_lock_parent(void){};
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// void __malloc_fork_unlock_parent(void){};
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// void __malloc_fork_unlock_child(void){};
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import "C"
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