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Make signal handling work well across platforms

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- Fix sigsuspend() on XNU
- Fix strsignal() on non-Linux
- Add unit tests for strsignal()
- Add unit tests for setitimer()
- Add unit tests for sigsuspend()
- Rewrite setitimer() for New Technology
- Rewrite nanosleep() for New Technology
- Polyfill SIGALRM on the New Technology
- select(0,0,0,0) on NT now calls pause()
- Remove some NTDLL calls that aren't needed
- Polyfill SA_NOCLDWAIT on the New Technology
- Polyfill SA_RESETHAND on the New Technology
- Polyfill sigprocmask() on the New Technology
- Polyfill SIGCHLD+SIG_IGN on the New Technology
- Polyfill SA_RESTART masking on the New Technology
- Deliver console signals from main thread on New Technology
- Document SA_RESTART behavior w/ @sarestartable / @norestart
- System call trace in MODE=dbg now prints inherited FDs and signal mask
This commit is contained in:
Justine Tunney 2022-03-25 07:11:44 -07:00
parent 3b9e66ecba
commit 072e1d2910
82 changed files with 1388 additions and 450 deletions
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77
test/libc/calls/sigprocmask_test.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/sigbits.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/calls/struct/siginfo.h"
#include "libc/calls/struct/sigset.h"
#include "libc/calls/ucontext.h"
#include "libc/dce.h"
#include "libc/sysv/consts/sa.h"
#include "libc/sysv/consts/sig.h"
#include "libc/testlib/testlib.h"
int n;
void OnSig(int sig, siginfo_t *si, ucontext_t *ctx) {
++n;
}
TEST(sigprocmask, testMultipleBlockedDeliveries) {
int pid, ws;
sigset_t neu, old;
struct sigaction oldusr1, oldusr2;
struct sigaction sa = {.sa_sigaction = OnSig, .sa_flags = SA_SIGINFO};
n = 0;
sigemptyset(&neu);
sigaddset(&neu, SIGUSR1);
sigaddset(&neu, SIGUSR2);
EXPECT_EQ(0, sigprocmask(SIG_BLOCK, &neu, &old));
ASSERT_EQ(0, sigaction(SIGUSR1, &sa, &oldusr1));
ASSERT_EQ(0, sigaction(SIGUSR2, &sa, &oldusr2));
ASSERT_EQ(0, raise(SIGUSR1));
ASSERT_EQ(0, raise(SIGUSR2));
EXPECT_EQ(0, n);
EXPECT_EQ(0, sigprocmask(SIG_SETMASK, &old, NULL));
EXPECT_EQ(0, sigaction(SIGUSR1, &oldusr1, 0));
EXPECT_EQ(0, sigaction(SIGUSR2, &oldusr2, 0));
ASSERT_EQ(2, n);
}
TEST(sigprocmask, testMultipleBlockedDeliveriesOfSameSignal) {
int pid, ws;
sigset_t neu, old;
struct sigaction oldusr2;
struct sigaction sa = {.sa_sigaction = OnSig, .sa_flags = SA_SIGINFO};
n = 0;
sigemptyset(&neu);
sigaddset(&neu, SIGUSR2);
EXPECT_EQ(0, sigprocmask(SIG_BLOCK, &neu, &old));
ASSERT_EQ(0, sigaction(SIGUSR2, &sa, &oldusr2));
ASSERT_EQ(0, raise(SIGUSR2));
ASSERT_EQ(0, raise(SIGUSR2));
EXPECT_EQ(0, n);
EXPECT_EQ(0, sigprocmask(SIG_SETMASK, &old, NULL));
EXPECT_EQ(0, sigaction(SIGUSR2, &oldusr2, 0));
if (IsFreebsd() || IsWindows()) {
EXPECT_EQ(2, n);
} else {
EXPECT_EQ(1, n);
}
}