mirror of
https://github.com/jart/cosmopolitan.git
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95 lines
3.9 KiB
C
95 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 2020 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/log/check.h"
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#include "libc/log/log.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/sa.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/testlib.h"
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testonly void OnUsr1(int sig) {
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_exit(0);
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}
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void SetUpOnce(void) {
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ASSERT_SYS(0, 0, pledge("stdio proc", 0));
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}
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TEST(signal, test) {
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ASSERT_NE(SIG_ERR, signal(SIGUSR1, OnUsr1));
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ASSERT_NE(-1, raise(SIGUSR1));
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__die();
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}
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////////////////////////////////////////////////////////////////////////////////
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// signal round-trip delivery takes about 1µs
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void OnSigTrap(int sig, struct siginfo *si, struct ucontext *ctx) {
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}
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void TrapBench(int n) {
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for (int i = 0; i < n; ++i) {
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asm("int3");
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}
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}
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BENCH(signal, trapBench) {
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struct sigaction old;
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struct sigaction sabus = {.sa_sigaction = OnSigTrap};
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ASSERT_SYS(0, 0, sigaction(SIGTRAP, &sabus, &old));
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EZBENCH_N("signal trap", 16, TrapBench(16));
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EZBENCH_N("signal trap", 256, TrapBench(256));
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EZBENCH_N("signal trap", 1024, TrapBench(1024));
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sigaction(SIGTRAP, &old, 0);
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}
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BENCH(signal, trapBenchSiginfo) {
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struct sigaction old;
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struct sigaction sabus = {.sa_sigaction = OnSigTrap, .sa_flags = SA_SIGINFO};
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ASSERT_SYS(0, 0, sigaction(SIGTRAP, &sabus, &old));
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EZBENCH_N("siginfo trap", 16, TrapBench(16));
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EZBENCH_N("siginfo trap", 256, TrapBench(256));
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EZBENCH_N("siginfo trap", 1024, TrapBench(1024));
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sigaction(SIGTRAP, &old, 0);
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}
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void OnSigHlt(int sig, struct siginfo *si, struct ucontext *ctx) {
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ctx->uc_mcontext.rip += 1;
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}
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void HltBench(int n) {
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for (int i = 0; i < n; ++i) {
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asm("hlt");
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}
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}
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BENCH(signal, hltBenchSiginfo) {
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struct sigaction old[2];
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struct sigaction sabus = {.sa_sigaction = OnSigHlt, .sa_flags = SA_SIGINFO};
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ASSERT_SYS(0, 0, sigaction(SIGSEGV, &sabus, old + 0));
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ASSERT_SYS(0, 0, sigaction(SIGBUS, &sabus, old + 1));
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EZBENCH_N("siginfo hlt", 16, HltBench(16));
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EZBENCH_N("siginfo hlt", 256, HltBench(256));
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EZBENCH_N("siginfo hlt", 1024, HltBench(1024));
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sigaction(SIGSEGV, old + 0, 0);
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sigaction(SIGBUS, old + 1, 0);
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}
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