mirror of
https://github.com/jart/cosmopolitan.git
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92 lines
3.9 KiB
C
92 lines
3.9 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 2022 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 "ape/sections.internal.h"
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#include "libc/calls/struct/rlimit.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/limits.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/map.h"
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#include "libc/sysv/consts/prot.h"
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#include "libc/sysv/consts/rlimit.h"
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#include "libc/testlib/subprocess.h"
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#include "libc/testlib/testlib.h"
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void SetUp(void) {
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if (IsWindows()) {
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ASSERT_SYS(ENOSYS, -1, brk(0));
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ASSERT_SYS(ENOSYS, MAP_FAILED, sbrk(0));
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exit(0);
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}
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}
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TEST(sbrk, testReportCurrentBreak) {
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ASSERT_SYS(0, _end, sbrk(0));
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}
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TEST(sbrk, hugeDelta_returnsEoverflow) {
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ASSERT_SYS(EOVERFLOW, MAP_FAILED, sbrk(INTPTR_MAX));
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}
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TEST(brk, underflowsEnd_returnsEinval) {
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ASSERT_SYS(EINVAL, -1, brk(0));
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}
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TEST(sbrk, underflowsEnd_returnsEinval) {
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ASSERT_SYS(EINVAL, MAP_FAILED, sbrk(-PAGESIZE));
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}
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TEST(sbrk, giantDelta_returnsEnomem) {
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if (IsXnu()) return; // mmap polyfills this but brk doesn't right now
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SPAWN(fork);
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struct rlimit rl = {1024 * 1024, 1024 * 1024};
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ASSERT_SYS(0, 0, setrlimit(RLIMIT_AS, &rl));
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ASSERT_SYS(ENOMEM, MAP_FAILED, sbrk(1024 * 1024 * 4));
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EXITS(0);
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}
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TEST(sbrk, overlapsExistingMapping_failsWithEexist) {
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char *p = (char *)ROUNDUP((intptr_t)_end, FRAMESIZE);
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ASSERT_EQ(p, mmap(p, FRAMESIZE, PROT_READ | PROT_WRITE,
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MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0));
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ASSERT_SYS(EEXIST, MAP_FAILED, sbrk(FRAMESIZE));
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ASSERT_SYS(0, 0, munmap(p, FRAMESIZE));
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}
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TEST(sbrk, testGrowAndShrink) {
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SPAWN(fork);
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ASSERT_FALSE(testlib_memoryexists(_end));
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ASSERT_SYS(0, _end, sbrk(PAGESIZE));
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ASSERT_SYS(0, _end + PAGESIZE, sbrk(0));
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ASSERT_TRUE(testlib_memoryexists(_end));
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ASSERT_FALSE(testlib_memoryexists(_end + PAGESIZE));
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ASSERT_SYS(0, _end + PAGESIZE, sbrk(-PAGESIZE));
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ASSERT_FALSE(testlib_memoryexists(_end));
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EXITS(0);
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}
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TEST(brk, testGrowAndShrink) {
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SPAWN(fork);
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ASSERT_FALSE(testlib_memoryexists(_end));
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ASSERT_EQ(0, brk(_end + PAGESIZE));
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ASSERT_TRUE(testlib_memoryexists(_end));
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ASSERT_FALSE(testlib_memoryexists(_end + PAGESIZE));
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ASSERT_EQ(0, brk(_end));
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EXITS(0);
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}
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