musl: Add patch to support SIGEV_THREAD_ID

This is needed by qemu-linux-user.

1 files changed, 77 insertions, 0 deletions

diff --git a/pkg/musl/patch/0002-add-support-for-SIGEV_THREAD_ID-timers.patch b/pkg/musl/patch/0002-add-support-for-SIGEV_THREAD_ID-timers.patch
new file mode 100644
index 00000000..46b8ffee
--- /dev/null
+++ b/pkg/musl/patch/0002-add-support-for-SIGEV_THREAD_ID-timers.patch
@@ -0,0 +1,77 @@
+From fd3bc4cba48c8da106618fe9c025a9ebbb0da7be Mon Sep 17 00:00:00 2001
+From: James Y Knight <jyknight@google.com>
+Date: Sun, 30 Jun 2019 21:55:20 -0400
+Subject: [PATCH] add support for SIGEV_THREAD_ID timers
+
+This is like SIGEV_SIGNAL, but targeted to a particular thread's
+tid, rather than the process.
+---
+ include/signal.h        | 16 +++++++++++++---
+ src/time/timer_create.c |  8 ++++++--
+ 2 files changed, 19 insertions(+), 5 deletions(-)
+
+diff --git a/include/signal.h b/include/signal.h
+index fbdf667b..9ed929e4 100644
+--- a/include/signal.h
++++ b/include/signal.h
+@@ -180,14 +180,24 @@ struct sigevent {
+ 	union sigval sigev_value;
+ 	int sigev_signo;
+ 	int sigev_notify;
+-	void (*sigev_notify_function)(union sigval);
+-	pthread_attr_t *sigev_notify_attributes;
+-	char __pad[56-3*sizeof(long)];
++	union {
++		char __pad[64 - 2*sizeof(int) - sizeof(union sigval)];
++		pid_t sigev_notify_thread_id;
++		struct {
++			void (*sigev_notify_function)(union sigval);
++			pthread_attr_t *sigev_notify_attributes;
++		} __sev_thread;
++	} __sev_fields;
+ };
+ 
++#define sigev_notify_thread_id __sev_fields.sigev_notify_thread_id
++#define sigev_notify_function __sev_fields.__sev_thread.sigev_notify_function
++#define sigev_notify_attributes __sev_fields.__sev_thread.sigev_notify_attributes
++
+ #define SIGEV_SIGNAL 0
+ #define SIGEV_NONE 1
+ #define SIGEV_THREAD 2
++#define SIGEV_THREAD_ID 4
+ 
+ int __libc_current_sigrtmin(void);
+ int __libc_current_sigrtmax(void);
+diff --git a/src/time/timer_create.c b/src/time/timer_create.c
+index 455d49fc..4015673f 100644
+--- a/src/time/timer_create.c
++++ b/src/time/timer_create.c
+@@ -83,11 +83,15 @@ int timer_create(clockid_t clk, struct sigevent *restrict evp, timer_t *restrict
+ 	switch (evp ? evp->sigev_notify : SIGEV_SIGNAL) {
+ 	case SIGEV_NONE:
+ 	case SIGEV_SIGNAL:
++	case SIGEV_THREAD_ID:
+ 		if (evp) {
+ 			ksev.sigev_value = evp->sigev_value;
+ 			ksev.sigev_signo = evp->sigev_signo;
+ 			ksev.sigev_notify = evp->sigev_notify;
+-			ksev.sigev_tid = 0;
++			if (evp->sigev_notify == SIGEV_THREAD_ID)
++				ksev.sigev_tid = evp->sigev_notify_thread_id;
++			else
++				ksev.sigev_tid = 0;
+ 			ksevp = &ksev;
+ 		}
+ 		if (syscall(SYS_timer_create, clk, ksevp, &timerid) < 0)
+@@ -115,7 +119,7 @@ int timer_create(clockid_t clk, struct sigevent *restrict evp, timer_t *restrict
+ 
+ 		ksev.sigev_value.sival_ptr = 0;
+ 		ksev.sigev_signo = SIGTIMER;
+-		ksev.sigev_notify = 4; /* SIGEV_THREAD_ID */
++		ksev.sigev_notify = SIGEV_THREAD_ID;
+ 		ksev.sigev_tid = td->tid;
+ 		if (syscall(SYS_timer_create, clk, &ksev, &timerid) < 0)
+ 			timerid = -1;
+-- 
+2.29.0
+