Dmitry V. Levin
b93d52fe3d
strace is now provided under the terms of the GNU Lesser General Public License version 2.1 or later, see COPYING for more details. strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/*
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* Copyright (c) 2013-2018 The strace developers.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#ifndef STRACE_MMAP_CACHE_H
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#define STRACE_MMAP_CACHE_H
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/*
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* Keep a sorted array of cache entries,
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* so that we can binary search through it.
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*/
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struct mmap_cache_t {
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struct mmap_cache_entry_t *entry;
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void (*free_fn)(struct tcb *, const char *caller);
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unsigned int size;
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unsigned int generation;
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};
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struct mmap_cache_entry_t {
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/**
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* example entry:
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* 7fabbb09b000-7fabbb09f000 r-xp 00179000 fc:00 1180246 /lib/libc-2.11.1.so
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*
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* start_addr is 0x7fabbb09b000
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* end_addr is 0x7fabbb09f000
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* mmap_offset is 0x179000
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* protections is MMAP_CACHE_PROT_READABLE|MMAP_CACHE_PROT_EXECUTABLE
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* major is 0xfc
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* minor is 0x00
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* binary_filename is "/lib/libc-2.11.1.so"
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*/
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unsigned long start_addr;
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unsigned long end_addr;
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unsigned long mmap_offset;
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unsigned char protections;
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unsigned long major, minor;
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char *binary_filename;
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};
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enum mmap_cache_protection {
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MMAP_CACHE_PROT_READABLE = 1 << 0,
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MMAP_CACHE_PROT_WRITABLE = 1 << 1,
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MMAP_CACHE_PROT_EXECUTABLE = 1 << 2,
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MMAP_CACHE_PROT_SHARED = 1 << 3,
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};
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enum mmap_cache_rebuild_result {
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MMAP_CACHE_REBUILD_NOCACHE,
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MMAP_CACHE_REBUILD_READY,
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MMAP_CACHE_REBUILD_RENEWED,
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};
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typedef bool (*mmap_cache_search_fn)(struct mmap_cache_entry_t *, void *);
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extern void
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mmap_cache_enable(void);
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extern enum mmap_cache_rebuild_result
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mmap_cache_rebuild_if_invalid(struct tcb *, const char *caller);
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extern struct mmap_cache_entry_t *
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mmap_cache_search(struct tcb *, unsigned long ip);
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extern struct mmap_cache_entry_t *
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mmap_cache_search_custom(struct tcb *, mmap_cache_search_fn, void *);
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#endif /* !STRACE_MMAP_CACHE_H */
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