JIT for PHP based on DynAsm

Zend/zend_gdb.c

@@ -0,0 +1,140 @@
+/*
+   +----------------------------------------------------------------------+
+   | Zend Engine                                                          |
+   +----------------------------------------------------------------------+
+   | Copyright (c) Zend Technologies Ltd. (http://www.zend.com)           |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 2.00 of the Zend license,     |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available through the world-wide-web at the following url:           |
+   | http://www.zend.com/license/2_00.txt.                                |
+   | If you did not receive a copy of the Zend license and are unable to  |
+   | obtain it through the world-wide-web, please send a note to          |
+   | [email protected] so we can mail you a copy immediately.              |
+   +----------------------------------------------------------------------+
+   | Authors: Dmitry Stogov <[email protected]>                             |
+   |          Xinchen Hui <[email protected]>                            |
+   +----------------------------------------------------------------------+
+*/
+
+#include "zend.h"
+#include "zend_gdb.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+enum {
+	ZEND_GDBJIT_NOACTION,
+	ZEND_GDBJIT_REGISTER,
+	ZEND_GDBJIT_UNREGISTER
+};
+
+typedef struct _zend_gdbjit_code_entry {
+	struct _zend_gdbjit_code_entry *next_entry;
+	struct _zend_gdbjit_code_entry *prev_entry;
+	const char                     *symfile_addr;
+	uint64_t                        symfile_size;
+} zend_gdbjit_code_entry;
+
+typedef struct _zend_gdbjit_descriptor {
+	uint32_t                         version;
+	uint32_t                         action_flag;
+	struct _zend_gdbjit_code_entry *relevant_entry;
+	struct _zend_gdbjit_code_entry *first_entry;
+} zend_gdbjit_descriptor;
+
+ZEND_API zend_gdbjit_descriptor __jit_debug_descriptor = {
+	1, ZEND_GDBJIT_NOACTION, NULL, NULL
+};
+
+ZEND_API zend_never_inline void __jit_debug_register_code()
+{
+	__asm__ __volatile__("");
+}
+
+ZEND_API int zend_gdb_register_code(const void *object, size_t size)
+{
+	zend_gdbjit_code_entry *entry;
+
+	entry = malloc(sizeof(zend_gdbjit_code_entry) + size);
+	if (entry == NULL) {
+		return 0;
+	}
+
+	entry->symfile_addr = ((char*)entry) + sizeof(zend_gdbjit_code_entry);
+	entry->symfile_size = size;
+
+	memcpy((char *)entry->symfile_addr, object, size);
+
+	entry->prev_entry = NULL;
+	entry->next_entry = __jit_debug_descriptor.first_entry;
+
+	if (entry->next_entry) {
+		entry->next_entry->prev_entry = entry;
+	}
+	__jit_debug_descriptor.first_entry = entry;
+
+	/* Notify GDB */
+	__jit_debug_descriptor.relevant_entry = entry;
+	__jit_debug_descriptor.action_flag = ZEND_GDBJIT_REGISTER;
+	__jit_debug_register_code();
+
+	return 1;
+}
+
+ZEND_API void zend_gdb_unregister_all(void)
+{
+	zend_gdbjit_code_entry *entry;
+
+	__jit_debug_descriptor.action_flag = ZEND_GDBJIT_UNREGISTER;
+	while ((entry = __jit_debug_descriptor.first_entry)) {
+		__jit_debug_descriptor.first_entry = entry->next_entry;
+		if (entry->next_entry) {
+			entry->next_entry->prev_entry = NULL;
+		}
+		/* Notify GDB */
+		__jit_debug_descriptor.relevant_entry = entry;
+		__jit_debug_register_code();
+
+		free(entry);
+	}
+}
+
+ZEND_API int zend_gdb_present(void)
+{
+	int ret = 0;
+	int fd = open("/proc/self/status", O_RDONLY);
+
+	if (fd > 0) {
+		char buf[1024];
+		ssize_t n = read(fd, buf, sizeof(buf) - 1);
+		char *s;
+		pid_t pid;
+
+		if (n > 0) {
+			buf[n] = 0;
+			s = strstr(buf, "TracerPid:");
+			if (s) {
+				s += sizeof("TracerPid:") - 1;
+				while (*s == ' ' || *s == '\t') {
+					s++;
+				}
+				pid = atoi(s);
+				if (pid) {
+					sprintf(buf, "/proc/%d/exe", (int)pid);
+					if (readlink(buf, buf, sizeof(buf) - 1) > 0) {
+						if (strstr(buf, "gdb")) {
+							ret = 1;
+						}
+					}
+				}
+			}
+		}
+
+		close(fd);
+	}
+
+	return ret;
+}

Zend/zend_gdb.h

@@ -0,0 +1,27 @@
+/*
+   +----------------------------------------------------------------------+
+   | Zend Engine                                                          |
+   +----------------------------------------------------------------------+
+   | Copyright (c) Zend Technologies Ltd. (http://www.zend.com)           |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 2.00 of the Zend license,     |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available through the world-wide-web at the following url:           |
+   | http://www.zend.com/license/2_00.txt.                                |
+   | If you did not receive a copy of the Zend license and are unable to  |
+   | obtain it through the world-wide-web, please send a note to          |
+   | [email protected] so we can mail you a copy immediately.              |
+   +----------------------------------------------------------------------+
+   | Authors: Dmitry Stogov <[email protected]>                             |
+   |          Xinchen Hui <[email protected]>                            |
+   +----------------------------------------------------------------------+
+*/
+
+#ifndef ZEND_GDB
+#define ZEND_GDB
+
+ZEND_API int  zend_gdb_register_code(const void *object, size_t size);
+ZEND_API void zend_gdb_unregister_all(void);
+ZEND_API int  zend_gdb_present(void);
+
+#endif

acinclude.m4

@@ -2119,7 +2119,7 @@ dnl
 dnl Common setup macro for ICU
 dnl
 AC_DEFUN([PHP_SETUP_ICU],[
-  PKG_CHECK_MODULES([ICU], [icu-io >= 50.1])
+  PKG_CHECK_MODULES([ICU], [icu-uc >= 50.1 icu-io icu-i18n])
 
   PHP_EVAL_INCLINE($ICU_CFLAGS)
   PHP_EVAL_LIBLINE($ICU_LIBS, $1)

configure.ac

@@ -1522,7 +1522,7 @@ PHP_ADD_SOURCES(Zend, \
     zend_iterators.c zend_interfaces.c zend_exceptions.c zend_strtod.c zend_gc.c \
     zend_closures.c zend_float.c zend_string.c zend_signal.c zend_generators.c \
     zend_virtual_cwd.c zend_ast.c zend_objects.c zend_object_handlers.c zend_objects_API.c \
-    zend_default_classes.c zend_inheritance.c zend_smart_str.c zend_cpuinfo.c, \
+    zend_default_classes.c zend_inheritance.c zend_smart_str.c zend_cpuinfo.c zend_gdb.c, \
 	-DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
 
 dnl Selectively disable optimization due to high RAM usage during