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Make _Thread_local work across platforms

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We now rewrite the binary image at runtime on Windows and XNU to change
mov %fs:0,%reg instructions to use %gs instead. There's also simpler
threading API introduced by this change and it's called _spawn() and
_join(), which has replaced most clone() usage.
This commit is contained in:
Justine Tunney 2022-07-10 04:01:17 -07:00
parent e4d6e263d4
commit 5f4f6b0e69
51 changed files with 808 additions and 1043 deletions
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17
test/libc/stdio/dtoa_test.c
View file

@ -28,6 +28,7 @@
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/prot.h"
#include "libc/testlib/testlib.h"
#include "libc/thread/spawn.h"
#include "libc/x/x.h"
#define THREADS 32
@ -46,10 +47,9 @@ union Dub {
double x;
};
char *stack[THREADS];
char tls[THREADS][64];
struct spawn th[THREADS];
int Worker(void *p) {
int Worker(void *p, int tid) {
int i;
char str[64];
for (i = 0; i < 256; ++i) {
@ -63,17 +63,10 @@ int Worker(void *p) {
TEST(dtoa, test) {
int i;
for (i = 0; i < THREADS; ++i) {
clone(Worker,
(stack[i] = mmap(0, GetStackSize(), PROT_READ | PROT_WRITE,
MAP_STACK | MAP_ANONYMOUS, -1, 0)),
GetStackSize(),
CLONE_THREAD | CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | CLONE_SETTLS,
0, 0, __initialize_tls(tls[i]), sizeof(tls[i]),
(int *)(tls[i] + 0x38));
_spawn(Worker, 0, th + i);
}
for (i = 0; i < THREADS; ++i) {
_wait0((int *)(tls[i] + 0x38));
_join(th + i);
}
}