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Implement thread cancellation for aarch64

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This commit is contained in:
Justine Tunney 2023-09-07 08:29:16 -07:00
parent dcda6f7d8d
commit 032b1f3449
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GPG key ID: BE714B4575D6E328
54 changed files with 297 additions and 167 deletions
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13
libc/thread/pthread_cancel.c
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@ -21,11 +21,13 @@
#include "libc/calls/struct/sigaction.h"
#include "libc/calls/struct/siginfo.h"
#include "libc/calls/struct/sigset.h"
#include "libc/calls/struct/ucontext.internal.h"
#include "libc/calls/syscall_support-sysv.internal.h"
#include "libc/calls/ucontext.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/atomic.h"
#include "libc/intrin/kprintf.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/sa.h"
@ -34,14 +36,13 @@
#include "libc/thread/posixthread.internal.h"
#include "libc/thread/thread.h"
#include "libc/thread/tls.h"
#ifdef __x86_64__
int systemfive_cancel(void);
extern const char systemfive_cancellable[];
extern const char systemfive_cancellable_end[];
int _pthread_cancel_sys(void) {
long _pthread_cancel_sys(void) {
struct PosixThread *pt;
pt = (struct PosixThread *)__get_tls()->tib_pthread;
if (!(pt->flags & (PT_NOCANCEL | PT_MASKED)) || (pt->flags & PT_ASYNC)) {
@ -60,9 +61,9 @@ static void OnSigThr(int sig, siginfo_t *si, void *ctx) {
!(pt->flags & PT_NOCANCEL) &&
atomic_load_explicit(&pt->cancelled, memory_order_acquire)) {
sigaddset(&uc->uc_sigmask, sig);
if (systemfive_cancellable <= (char *)uc->uc_mcontext.rip &&
(char *)uc->uc_mcontext.rip < systemfive_cancellable_end) {
uc->uc_mcontext.rip = (intptr_t)systemfive_cancel;
if (systemfive_cancellable <= (char *)uc->uc_mcontext.PC &&
(char *)uc->uc_mcontext.PC < systemfive_cancellable_end) {
uc->uc_mcontext.PC = (intptr_t)systemfive_cancel;
} else if (pt->flags & PT_ASYNC) {
pthread_exit(PTHREAD_CANCELED);
} else {
@ -302,8 +303,6 @@ errno_t pthread_cancel(pthread_t thread) {
return rc;
}
#endif /* __x86_64__ */
/**
* Creates cancellation point in calling thread.
*