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Get threads working on all platforms

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We now have a high-quality clone() implementation for creating
lightweight threads on Linux/Windows/FreeBSD/NetBSD/OpenBSD.
This commit is contained in:
Justine Tunney 2022-05-12 17:52:13 -07:00
parent 4e62cefa6e
commit fec396037a
43 changed files with 850 additions and 532 deletions
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0
test/libc/calls/tkill_test.c Normal file
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0
test/libc/intrin/gettid_test.c Normal file
View file

14
test/libc/rand/rand64_test.c
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@ -33,6 +33,7 @@
#include "libc/sysv/consts/sa.h"
#include "libc/sysv/consts/sig.h"
#include "libc/testlib/testlib.h"
#include "libc/time/time.h"
#define THREADS 8
#define ENTRIES 256
@ -76,7 +77,6 @@ TEST(rand64, testThreadSafety_doesntProduceIdenticalValues) {
sigset_t ss, oldss;
void *stacks[THREADS];
int i, j, rc, ws, tid[THREADS];
if (IsXnu()) return;
struct sigaction oldsa;
struct sigaction sa = {.sa_handler = OnChld, .sa_flags = SA_RESTART};
EXPECT_NE(-1, sigaction(SIGCHLD, &sa, &oldsa));
@ -89,9 +89,9 @@ TEST(rand64, testThreadSafety_doesntProduceIdenticalValues) {
}
ready = false;
for (i = 0; i < THREADS; ++i) {
stacks[i] = mmap(0, FRAMESIZE, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
tid[i] = clone(Thrasher, stacks[i], FRAMESIZE,
stacks[i] = mmap(0, GetStackSize(), PROT_READ | PROT_WRITE,
MAP_STACK | MAP_ANONYMOUS, -1, 0);
tid[i] = clone(Thrasher, stacks[i], GetStackSize(),
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
(void *)(intptr_t)i, 0, 0, 0, 0);
ASSERT_NE(-1, tid[i]);
@ -110,6 +110,10 @@ TEST(rand64, testThreadSafety_doesntProduceIdenticalValues) {
}
}
for (i = 0; i < THREADS; ++i) {
EXPECT_SYS(0, 0, munmap(stacks[i], FRAMESIZE));
tkill(tid[i], SIGKILL);
errno = 0;
}
for (i = 0; i < THREADS; ++i) {
EXPECT_SYS(0, 0, munmap(stacks[i], GetStackSize()));
}
}

31
test/libc/thread/clone_test.c → test/libc/runtime/clone_test.c
View file

@ -18,43 +18,52 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/spinlock.h"
#include "libc/runtime/stack.h"
#include "libc/sysv/consts/clone.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/consts/sig.h"
#include "libc/testlib/testlib.h"
#include "libc/time/time.h"
int x, thechilde;
char *stack;
int x, me, thechilde;
_Alignas(64) volatile char lock;
void SetUp(void) {
x = 0;
lock = 0;
me = gettid();
thechilde = 0;
ASSERT_NE(MAP_FAILED, (stack = mmap(0, GetStackSize(), PROT_READ | PROT_WRITE,
MAP_STACK | MAP_ANONYMOUS, -1, 0)));
}
int thread(void *arg) {
void TearDown(void) {
tkill(thechilde, SIGKILL), errno = 0;
sched_yield();
EXPECT_SYS(0, 0, munmap(stack, GetStackSize()));
}
int CloneTest1(void *arg) {
x = 42;
ASSERT_EQ(23, (intptr_t)arg);
thechilde = gettid();
ASSERT_NE(gettid(), getpid());
_spunlock(&lock);
return 0;
}
TEST(clone, test) {
if (IsXnu()) return;
int me, tid;
char *stack;
me = gettid();
TEST(clone, test1) {
int tid;
_spinlock(&lock);
stack = mmap(0, FRAMESIZE, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
ASSERT_NE(-1, (tid = clone(thread, stack, FRAMESIZE,
ASSERT_NE(-1, (tid = clone(CloneTest1, stack, GetStackSize(),
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
(void *)23, 0, 0, 0, 0)));
_spinlock(&lock);
ASSERT_EQ(42, x);
ASSERT_NE(me, tid);
ASSERT_EQ(tid, thechilde);
EXPECT_SYS(0, 0, munmap(stack, FRAMESIZE));
}