mirror of
https://github.com/jart/cosmopolitan.git
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18bb5888e1
- Remove PAGESIZE constant
- Fix realloc() documentation
- Fix ttyname_r() error reporting
- Make forking more reliable on Windows
- Make execvp() a few microseconds faster
- Make system() a few microseconds faster
- Tighten up the socket-related magic numbers
- Loosen restrictions on mmap() offset alignment
- Improve GetProgramExecutableName() with getenv("_")
- Use mkstemp() as basis for mktemp(), tmpfile(), tmpfd()
- Fix flakes in pthread_cancel_test, unix_test, fork_test
- Fix recently introduced futex stack overflow regression
- Let sockets be passed as stdio to subprocesses on Windows
- Improve security of bind() on Windows w/ SO_EXCLUSIVEADDRUSE
48 lines
2.8 KiB
C
48 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2023 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/mem/hook.internal.h"
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#include "libc/mem/mem.h"
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#include "third_party/dlmalloc/dlmalloc.h"
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void *(*hook_malloc)(size_t) = dlmalloc;
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/**
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* Allocates uninitialized memory.
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*
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* Returns a pointer to a newly allocated chunk of at least n bytes, or
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* null if no space is available, in which case errno is set to ENOMEM
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* on ANSI C systems.
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*
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* If n is zero, malloc returns a minimum-sized chunk. (The minimum size
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* is 32 bytes on 64bit systems.) It should be assumed that zero bytes
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* are possible access, since that'll be enforced by `MODE=asan`.
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*
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* Note that size_t is an unsigned type, so calls with arguments that
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* would be negative if signed are interpreted as requests for huge
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* amounts of space, which will often fail. The maximum supported value
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* of n differs across systems, but is in all cases less than the
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* maximum representable value of a size_t.
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*
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* @param rdi is number of bytes needed, coerced to 1+
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* @return new memory, or NULL w/ errno
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* @threadsafe
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*/
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void *malloc(size_t n) {
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return hook_malloc(n);
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}
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