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https://github.com/jart/cosmopolitan.git
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8a44f913ae
Signals are extremely difficult to unit test reliably. This is why functions like sigsuspend() exist. When testing something else and portably it becomes impossible without access to kernel internals. OpenMP flakes in QEMU on one of my workstations. I don't think the support is production worthy, because there's been issues on MacOS additionally. It works great for every experiment I've used it for though. However a flaky test is worse than no test at all. So it's removed until someone takes an interest in productionizing it.
130 lines
5.7 KiB
C
130 lines
5.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/calls/calls.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/syslib.internal.h"
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#include "libc/sock/sock.h"
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#include "libc/sock/struct/sockaddr.h"
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#include "libc/stdio/stdio.h"
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#include "libc/sysv/consts/af.h"
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#include "libc/sysv/consts/f.h"
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#include "libc/sysv/consts/ipproto.h"
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#include "libc/sysv/consts/limits.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/sock.h"
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#include "libc/testlib/subprocess.h"
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#include "libc/testlib/testlib.h"
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#include "libc/thread/thread.h"
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TEST(O_NONBLOCK, canBeSetBySocket_toMakeListenNonBlocking) {
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// TODO(jart): this doesn't make any sense on windows
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if (IsWindows())
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return;
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char buf[16] = {0};
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uint32_t addrsize = sizeof(struct sockaddr_in);
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struct sockaddr_in addr = {
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.sin_family = AF_INET,
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.sin_addr.s_addr = htonl(0x7f000001),
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};
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pthread_spinlock_t *phaser = _mapshared(4096);
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EXPECT_EQ(0, pthread_spin_lock(phaser + 0));
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EXPECT_EQ(0, pthread_spin_lock(phaser + 1));
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ASSERT_SYS(0, 3, socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP));
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ASSERT_SYS(0, 0, bind(3, (struct sockaddr *)&addr, sizeof(addr)));
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ASSERT_SYS(0, 0, getsockname(3, (struct sockaddr *)&addr, &addrsize));
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ASSERT_SYS(0, 0, listen(3, SOMAXCONN));
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SPAWN(fork);
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ASSERT_SYS(EAGAIN, -1, accept(3, (struct sockaddr *)&addr, &addrsize));
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EXPECT_EQ(0, pthread_spin_unlock(phaser + 0));
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for (;;) {
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int e = errno;
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int fd = accept(3, (struct sockaddr *)&addr, &addrsize);
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if (fd == -1 && errno == EAGAIN) {
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errno = e;
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usleep(1000);
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continue;
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}
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ASSERT_SYS(0, 4, fd);
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break;
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}
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ASSERT_SYS(0, 5, send(4, "hello", 5, 0));
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EXPECT_EQ(0, pthread_spin_unlock(phaser + 1));
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EXPECT_SYS(0, 0, close(4));
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EXPECT_SYS(0, 0, close(3));
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PARENT();
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EXPECT_SYS(0, 0, close(3));
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ASSERT_SYS(0, 3, socket(AF_INET, SOCK_STREAM, IPPROTO_TCP));
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EXPECT_EQ(0, pthread_spin_lock(phaser + 0));
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ASSERT_SYS(0, 0, connect(3, (struct sockaddr *)&addr, sizeof(addr)));
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EXPECT_EQ(0, pthread_spin_lock(phaser + 1));
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EXPECT_SYS(0, 5, read(3, buf, 16));
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EXPECT_STREQ("hello", buf);
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EXPECT_SYS(0, 0, close(3));
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WAIT(exit, 0);
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munmap(phaser, 4096);
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}
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TEST(O_NONBLOCK, canBeTunedWithFcntl_toMakeReadNonBlocking) {
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char buf[16] = {0};
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uint32_t addrsize = sizeof(struct sockaddr_in);
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struct sockaddr_in addr = {
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.sin_family = AF_INET,
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.sin_addr.s_addr = htonl(0x7f000001),
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};
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pthread_spinlock_t *phaser = _mapshared(4096);
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EXPECT_EQ(0, pthread_spin_lock(phaser + 0));
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EXPECT_EQ(0, pthread_spin_lock(phaser + 1));
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ASSERT_SYS(0, 3, socket(AF_INET, SOCK_STREAM, IPPROTO_TCP));
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ASSERT_SYS(0, 0, bind(3, (struct sockaddr *)&addr, sizeof(addr)));
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ASSERT_SYS(0, 0, getsockname(3, (struct sockaddr *)&addr, &addrsize));
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ASSERT_SYS(0, 0, listen(3, SOMAXCONN));
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SPAWN(fork);
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ASSERT_SYS(0, 4, accept(3, (struct sockaddr *)&addr, &addrsize));
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EXPECT_EQ(0, pthread_spin_lock(phaser + 0));
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ASSERT_SYS(0, 5, send(4, "hello", 5, 0));
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EXPECT_EQ(0, pthread_spin_lock(phaser + 1));
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EXPECT_SYS(0, 0, close(4));
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EXPECT_SYS(0, 0, close(3));
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PARENT();
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EXPECT_SYS(0, 0, close(3));
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ASSERT_SYS(0, 3, socket(AF_INET, SOCK_STREAM, IPPROTO_TCP));
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ASSERT_SYS(0, O_RDWR, fcntl(3, F_GETFL) & O_ACCMODE); // QEMU O_LARGEFILE :(
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ASSERT_SYS(0, 0, connect(3, (struct sockaddr *)&addr, sizeof(addr)));
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ASSERT_SYS(0, 0, fcntl(3, F_SETFL, O_RDWR | O_NONBLOCK));
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ASSERT_SYS(EAGAIN, -1, read(3, buf, 16));
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EXPECT_EQ(0, pthread_spin_unlock(phaser + 0));
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TryAgain:
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int e = errno;
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ssize_t rc = read(3, buf, 16);
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if (rc == -1 && errno == EAGAIN) {
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errno = e;
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usleep(1000);
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goto TryAgain;
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}
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EXPECT_SYS(0, 5, rc);
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EXPECT_STREQ("hello", buf);
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EXPECT_EQ(0, pthread_spin_unlock(phaser + 1));
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EXPECT_SYS(0, 0, close(3));
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WAIT(exit, 0);
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munmap(phaser, 4096);
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}
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