79cabc92fd
This commit fixes a deadlock that can occur when the libc version holds a lock when calling munmap. In this case we could end up calling free() from vma_tree_delete which would in turn try to obtain the lock in libc. To avoid the issue put any deleted vma's in a new list on the vma module and release them on the next call to vma_tree_insert. This should be safe as this function is not called from the memory hooks. Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
97 строки
3.6 KiB
C
97 строки
3.6 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2007 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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*
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* Copyright (c) 2006 Voltaire. All rights reserved.
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* Copyright (c) 2009 IBM Corporation. All rights reserved.
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* Copyright (c) 2015-2017 Los Alamos National Security, LLC. All rights
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* reserved.
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*
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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/**
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* @file
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* Registration cache VMA lookup
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*/
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#ifndef MCA_RCACHE_BASE_VMA_H
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#define MCA_RCACHE_BASE_VMA_H
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#include "opal_config.h"
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#include "opal/class/opal_list.h"
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#include "opal/class/opal_rb_tree.h"
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#include "opal/class/opal_lifo.h"
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BEGIN_C_DECLS
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struct mca_rcache_base_registration_t;
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struct mca_rcache_base_vma_module_t {
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opal_object_t super;
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opal_rb_tree_t rb_tree;
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opal_list_t vma_list;
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opal_list_t vma_gc_list;
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size_t reg_cur_cache_size;
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opal_mutex_t vma_lock;
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};
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typedef struct mca_rcache_base_vma_module_t mca_rcache_base_vma_module_t;
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OBJ_CLASS_DECLARATION(mca_rcache_base_vma_module_t);
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mca_rcache_base_vma_module_t *mca_rcache_base_vma_module_alloc (void);
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int mca_rcache_base_vma_find (mca_rcache_base_vma_module_t *vma_module, void *addr,
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size_t size, struct mca_rcache_base_registration_t **reg);
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int mca_rcache_base_vma_find_all (mca_rcache_base_vma_module_t *vma_module, void *addr,
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size_t size, struct mca_rcache_base_registration_t **regs,
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int reg_cnt);
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int mca_rcache_base_vma_insert (mca_rcache_base_vma_module_t *vma_module,
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struct mca_rcache_base_registration_t *registration,
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size_t limit);
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int mca_rcache_base_vma_delete (mca_rcache_base_vma_module_t *vma_module,
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struct mca_rcache_base_registration_t *registration);
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void mca_rcache_base_vma_dump_range (mca_rcache_base_vma_module_t *vma_module,
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unsigned char *base, size_t size, char *msg);
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/**
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* Iterate over registrations in the specified range.
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*
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* @param[in] vma_module vma tree
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* @param[in] base base address of region
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* @param[in] size size of region
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* @param[in] callback_fn function to call for each matching registration handle
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* @param[in] ctx callback context
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*
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* The callback will be made with the vma lock held. This is a recursive lock so
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* it is still safe to call any vma functions on this vma_module. Keep in mind it
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* is only safe to call mca_rcache_base_vma_delete() on the supplied registration
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* from the callback. The iteration will terminate if the callback returns anything
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* other than OPAL_SUCCESS.
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*/
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int mca_rcache_base_vma_iterate (mca_rcache_base_vma_module_t *vma_module,
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unsigned char *base, size_t size,
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int (*callback_fn) (struct mca_rcache_base_registration_t *, void *),
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void *ctx);
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END_C_DECLS
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#endif /* MCA_RCACHE_BASE_VMA_H */
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