mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-03-03 15:38:22 +00:00
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
110 lines
4.3 KiB
C
110 lines
4.3 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 2021 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/calls/calls.h"
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#include "libc/calls/struct/sigaction.h"
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#include "libc/errno.h"
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#include "libc/intrin/bits.h"
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#include "libc/intrin/bsr.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/log/backtrace.internal.h"
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#include "libc/log/internal.h"
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#include "libc/log/libfatal.internal.h"
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#include "libc/log/log.h"
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#include "libc/runtime/internal.h"
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#include "libc/runtime/memtrack.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/testlib/testlib.h"
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#include "third_party/dlmalloc/dlmalloc.h"
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static dontasan dontubsan relegated uint64_t CountMappedBytes(void) {
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size_t i;
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uint64_t x, y;
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for (x = i = 0; i < _mmi.i; ++i) {
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y = _mmi.p[i].y - _mmi.p[i].x;
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x += (y + 1) << 16;
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}
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return x;
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}
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static relegated void DieBecauseOfQuota(int rc, const char *message) {
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int e = errno;
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char hostname[32];
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stpcpy(hostname, "unknown");
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gethostname(hostname, sizeof(hostname));
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kprintf("%s on %s pid %d\n", message, hostname, (long)getpid());
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PrintBacktraceUsingSymbols(2, 0, GetSymbolTable());
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_Exitr(rc);
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}
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static relegated void OnXcpu(int sig) {
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__restore_tty();
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DieBecauseOfQuota(23, "\n\nSIGXCPU: ran out of cpu");
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}
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static relegated void OnXfsz(int sig) {
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__restore_tty();
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DieBecauseOfQuota(25, "\n\nSIGXFSZ: exceeded maximum file size");
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}
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static unsigned long roundup2pow(unsigned long x) {
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return x > 1 ? 2ul << _bsrl(x - 1) : x ? 1 : 0;
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}
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relegated void __oom_hook(size_t request) {
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int e;
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uint64_t toto, newlim;
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__restore_tty();
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e = errno;
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toto = CountMappedBytes();
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kprintf("\n\nWE REQUIRE MORE VESPENE GAS");
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if (e != ENOMEM) kprintf(" (%s)", strerror(e));
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if (IsRunningUnderMake()) {
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newlim = toto + request;
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newlim += newlim >> 1;
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newlim = roundup2pow(newlim);
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kprintf("FIX CODE OR TUNE QUOTA += -M%dm\n", newlim / (1024 * 1024));
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}
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kprintf("\n");
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__print_maps();
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kprintf("\nTHE STRAW THAT BROKE THE CAMEL'S BACK\n");
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PrintBacktraceUsingSymbols(2, 0, GetSymbolTable());
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PrintSystemMappings(2);
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_Exitr(42);
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}
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static textstartup void InstallQuotaHandlers(void) {
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int e;
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struct sigaction sa;
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e = errno;
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sa.sa_flags = 0;
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sa.sa_handler = OnXcpu;
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sigemptyset(&sa.sa_mask);
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sigaction(SIGXCPU, &sa, 0);
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sa.sa_handler = OnXfsz;
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sigaction(SIGXFSZ, &sa, 0);
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GetSymbolTable(); /* for effect in case we oom */
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errno = e;
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}
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const void *const testlib_quota_handlers[] initarray = {
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InstallQuotaHandlers,
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};
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