From 8038a849691f6ab8477a5df94cddb4e0af5b670d Mon Sep 17 00:00:00 2001
From: David CARLIER <devnexen@gmail.com>
Date: Sun, 3 Jul 2022 15:49:18 +0100
Subject: [PATCH] opcache JIT: Adds initial support for macOs Instruments
 performance measurement.

By default, it is based on the perf_event Linux api, here
we add the proprietary Apple's format using directly its api.
---
 ext/opcache/jit/zend_jit_perf_dump.c | 43 ++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/ext/opcache/jit/zend_jit_perf_dump.c b/ext/opcache/jit/zend_jit_perf_dump.c
index 32ba5cd934544..bf4cfbf947a28 100644
--- a/ext/opcache/jit/zend_jit_perf_dump.c
+++ b/ext/opcache/jit/zend_jit_perf_dump.c
@@ -26,6 +26,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
+#if !defined(__APPLE__)
 #if defined(__linux__)
 #include <sys/syscall.h>
 #elif defined(__darwin__)
@@ -274,3 +275,45 @@ static void zend_jit_perf_map_register(const char *name, void *start, size_t siz
 	}
 	fprintf(fp, "%zx %zx %s\n", (size_t)(uintptr_t)start, size, name);
 }
+#else
+#include <os/log.h>
+#include <os/signpost.h>
+
+static os_log_t jitdump_fd;
+static os_signpost_id_t jitdump_sp = OS_SIGNPOST_ID_NULL;
+
+static void zend_jit_perf_jitdump_open(void)
+{
+	/**
+	 *  The `os_log_t` list per namespace is maintained by the os
+	 *  and are not deallocated by (and not deallocatable)
+	 *  but are reusable.
+	 */
+	jitdump_fd = os_log_create("net.php.opcache.jit", OS_LOG_CATEGORY_POINTS_OF_INTEREST);
+	jitdump_sp = os_signpost_id_generate(jitdump_fd);
+
+	if (jitdump_sp != OS_SIGNPOST_ID_NULL && jitdump_sp != OS_SIGNPOST_ID_INVALID) {
+		os_signpost_interval_begin(jitdump_fd, jitdump_sp, "zend_jitdump");
+	}
+}
+
+static void zend_jit_perf_jitdump_close(void)
+{
+	if (jitdump_sp != OS_SIGNPOST_ID_NULL && jitdump_sp != OS_SIGNPOST_ID_INVALID) {
+		os_signpost_interval_end(jitdump_fd, jitdump_sp, "zend_jitdump");
+	}
+}
+
+static void zend_jit_perf_jitdump_register(const char *name, void *start, size_t size)
+{
+}
+
+static void zend_jit_perf_map_register(const char *name, void *start, size_t size)
+{
+	os_signpost_id_t map = os_signpost_id_make_with_pointer(jitdump_fd, start);
+	if (map != OS_SIGNPOST_ID_NULL && map != OS_SIGNPOST_ID_INVALID) {
+		os_signpost_event_emit(jitdump_fd, map, "zend_jitdump_name", "%s", name);
+		os_signpost_event_emit(jitdump_fd, map, "zend_jitdump_size", "%lu", size);
+	}
+}
+#endif