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add new masked cancellation mode
[musl]
/
src
/
thread
/
pthread_cancel.c
diff --git
a/src/thread/pthread_cancel.c
b/src/thread/pthread_cancel.c
index
66e0817
..
1b71aa4
100644
(file)
--- a/
src/thread/pthread_cancel.c
+++ b/
src/thread/pthread_cancel.c
@@
-2,9
+2,13
@@
#include "syscall.h"
#include "libc.h"
#include "syscall.h"
#include "libc.h"
-
void
__cancel()
+
long
__cancel()
{
{
- pthread_exit(PTHREAD_CANCELED);
+ pthread_t self = __pthread_self();
+ if (self->canceldisable == PTHREAD_CANCEL_ENABLE || self->cancelasync)
+ pthread_exit(PTHREAD_CANCELED);
+ self->canceldisable = PTHREAD_CANCEL_DISABLE;
+ return -ECANCELED;
}
/* If __syscall_cp_asm has adjusted the stack pointer, it must provide a
}
/* If __syscall_cp_asm has adjusted the stack pointer, it must provide a
@@
-23,13
+27,16
@@
long __syscall_cp_c(syscall_arg_t nr,
{
pthread_t self;
long r;
{
pthread_t self;
long r;
+ int st;
- if (!libc.has_thread_pointer || (self = __pthread_self())->canceldisable)
+ if (!libc.has_thread_pointer || (st=(self=__pthread_self())->canceldisable)
+ && (st==PTHREAD_CANCEL_DISABLE || nr==SYS_close))
return __syscall(nr, u, v, w, x, y, z);
r = __syscall_cp_asm(&self->cancel, nr, u, v, w, x, y, z);
return __syscall(nr, u, v, w, x, y, z);
r = __syscall_cp_asm(&self->cancel, nr, u, v, w, x, y, z);
- if (r==-EINTR && nr!=SYS_close && self->cancel && !self->canceldisable)
- __cancel();
+ if (r==-EINTR && nr!=SYS_close && self->cancel &&
+ self->canceldisable != PTHREAD_CANCEL_DISABLE)
+ r = __cancel();
return r;
}
return r;
}
@@
-47,14
+54,13
@@
static void cancel_handler(int sig, siginfo_t *si, void *ctx)
extern const char __cp_begin[1], __cp_end[1];
a_barrier();
extern const char __cp_begin[1], __cp_end[1];
a_barrier();
- if (!self->cancel || self->canceldisable) return;
+ if (!self->cancel || self->canceldisable
== PTHREAD_CANCEL_DISABLE
) return;
_sigaddset(&uc->uc_sigmask, SIGCANCEL);
if (self->cancelasync || ip >= __cp_begin && ip < __cp_end) {
_sigaddset(&uc->uc_sigmask, SIGCANCEL);
if (self->cancelasync || ip >= __cp_begin && ip < __cp_end) {
- self->canceldisable = 1;
- pthread_sigmask(SIG_SETMASK, &uc->uc_sigmask, 0);
- __cancel();
+ ((char **)&uc->uc_mcontext)[CANCEL_REG_IP] = (char *)__cp_cancel;
+ return;
}
__syscall(SYS_tkill, self->tid, SIGCANCEL);
}
__syscall(SYS_tkill, self->tid, SIGCANCEL);