Add selected tracepoints for OpenJ9 -Xtrace

make/modules/java.base/Lib.gmk

@@ -24,7 +24,7 @@
 #
 
 # ===========================================================================
-# (c) Copyright IBM Corp. 2018, 2018 All Rights Reserved
+# (c) Copyright IBM Corp. 2018, 2025 All Rights Reserved
 # ===========================================================================
 
 include CopyFiles.gmk
@@ -80,6 +80,26 @@ $(eval $(call SetupJdkLibrary, BUILD_LIBNIO, \
     NAME := nio, \
     OPTIMIZATION := HIGH, \
     WARNINGS_AS_ERRORS_xlc := false, \
+    Net.c_CFLAGS := \
+        -I$(OPENJ9OMR_TOPDIR)/include_core \
+        -I$(OPENJ9_VM_BUILD_DIR)/jcl, \
+    nio_util.c_CFLAGS := \
+        -I$(OPENJ9_TOPDIR)/runtime/include \
+        -I$(OPENJ9_TOPDIR)/runtime/oti \
+        -I$(OPENJ9OMR_TOPDIR)/include_core \
+        -I$(OPENJ9_VM_BUILD_DIR) \
+        -I$(OPENJ9_TOPDIR)/runtime/jcl \
+        -I$(OPENJ9_TOPDIR)/runtime/util \
+        -I$(OPENJ9_VM_BUILD_DIR)/jcl, \
+    SocketDispatcher.c_CFLAGS := \
+        -I$(OPENJ9OMR_TOPDIR)/include_core \
+        -I$(OPENJ9_VM_BUILD_DIR)/jcl, \
+    UnixDispatcher.c_CFLAGS := \
+        -I$(OPENJ9OMR_TOPDIR)/include_core \
+        -I$(OPENJ9_VM_BUILD_DIR)/jcl, \
+    UnixDomainSockets.c_CFLAGS := \
+        -I$(OPENJ9OMR_TOPDIR)/include_core \
+        -I$(OPENJ9_VM_BUILD_DIR)/jcl, \
     EXTRA_HEADER_DIRS := \
         libnio/ch \
         libnio/fs \

make/modules/java.base/lib/CoreLibraries.gmk

@@ -23,6 +23,10 @@
 # questions.
 #
 
+# ===========================================================================
+# (c) Copyright IBM Corp. 2025, 2025 All Rights Reserved
+# ===========================================================================
+
 ################################################################################
 ## Build libverify
 ################################################################################
@@ -55,10 +59,32 @@ endif
 $(eval $(call SetupJdkLibrary, BUILD_LIBJAVA, \
     NAME := java, \
     OPTIMIZATION := HIGH, \
+    check_version.c_CFLAGS := \
+        -I$(OPENJ9_TOPDIR)/runtime/include \
+        -I$(OPENJ9_TOPDIR)/runtime/oti \
+        -I$(OPENJ9OMR_TOPDIR)/include_core \
+        -I$(OPENJ9_VM_BUILD_DIR) \
+        -I$(OPENJ9_TOPDIR)/runtime/jcl \
+        -I$(OPENJ9_TOPDIR)/runtime/util \
+        -I$(OPENJ9_VM_BUILD_DIR)/jcl, \
+    io_util_md.c_CFLAGS := \
+        -I$(OPENJ9OMR_TOPDIR)/include_core \
+        -I$(OPENJ9_VM_BUILD_DIR)/jcl, \
     jdk_util.c_CFLAGS := $(VERSION_CFLAGS), \
     ProcessImpl_md.c_CFLAGS := $(VERSION_CFLAGS), \
     java_props_md.c_CFLAGS := \
         -DARCHPROPNAME='"$(OPENJDK_TARGET_CPU_OSARCH)"', \
+    UnixFileSystem_md.c_CFLAGS := \
+        -I$(OPENJ9OMR_TOPDIR)/include_core \
+        -I$(OPENJ9_VM_BUILD_DIR)/jcl, \
+    VM.c_CFLAGS := \
+        -I$(OPENJ9_TOPDIR)/runtime/include \
+        -I$(OPENJ9_TOPDIR)/runtime/oti \
+        -I$(OPENJ9OMR_TOPDIR)/include_core \
+        -I$(OPENJ9_VM_BUILD_DIR) \
+        -I$(OPENJ9_TOPDIR)/runtime/jcl \
+        -I$(OPENJ9_TOPDIR)/runtime/util \
+        -I$(OPENJ9_VM_BUILD_DIR)/jcl, \
     WARNINGS_AS_ERRORS_xlc := false, \
     DISABLED_WARNINGS_gcc_ProcessImpl_md.c := unused-result, \
     DISABLED_WARNINGS_clang_TimeZone_md.c := unused-variable, \

src/java.base/share/native/libjava/VM.c

@@ -23,13 +23,26 @@
  * questions.
  */
 
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2025, 2025 All Rights Reserved
+ * ===========================================================================
+ */
+
 #include "jni.h"
 #include "jni_util.h"
 #include "jvm.h"
 #include "jdk_util.h"
 
 #include "jdk_internal_misc_VM.h"
 
+#if defined(WIN32)
+#include "j9access.h"
+/* tracehelp.c defines getTraceInterfaceFromVM(), used by J9_UTINTERFACE_FROM_VM(). */
+#include "tracehelp.c"
+#include "ut_jcl_java.c"
+#endif /* defined(WIN32) */
+
 /* Only register the performance-critical methods */
 static JNINativeMethod methods[] = {
     {"getNanoTimeAdjustment", "(J)J", (void *)&JVM_GetNanoTimeAdjustment}
@@ -42,6 +55,11 @@ Java_jdk_internal_misc_VM_latestUserDefinedLoader0(JNIEnv *env, jclass cls) {
 
 JNIEXPORT void JNICALL
 Java_jdk_internal_misc_VM_initialize(JNIEnv *env, jclass cls) {
+#if defined(WIN32)
+    /* Other platforms do this in check_version.c JNI_OnLoad. */
+    UT_JCL_JAVA_MODULE_LOADED(J9_UTINTERFACE_FROM_VM(((J9VMThread *) env)->javaVM));
+#endif /* defined(WIN32) */
+
     // Registers implementations of native methods described in methods[]
     // above.
     // In particular, registers JVM_GetNanoTimeAdjustment as the implementation

src/java.base/share/native/libjava/check_version.c

@@ -23,12 +23,30 @@
  * questions.
  */
 
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2025, 2025 All Rights Reserved
+ * ===========================================================================
+ */
+
 #include "jni.h"
 #include "jni_util.h"
 #include "jvm.h"
 
+#if !defined(WIN32)
+#include "j9access.h"
+/* tracehelp.c defines getTraceInterfaceFromVM(), used by J9_UTINTERFACE_FROM_VM(). */
+#include "tracehelp.c"
+#include "ut_jcl_java.c"
+#endif /* !defined(WIN32) */
+
 JNIEXPORT jint JNICALL
 DEF_JNI_OnLoad(JavaVM *vm, void *reserved)
 {
+#if !defined(WIN32)
+    /* Windows doesn't call JNI_OnLoad for libjava.dll, initialize the tracepoint elsewhere. */
+    UT_JCL_JAVA_MODULE_LOADED(J9_UTINTERFACE_FROM_VM((J9JavaVM *)vm));
+#endif /* !defined(WIN32) */
+
     return JNI_VERSION_1_2;
 }

src/java.base/share/native/libnio/nio_util.c

@@ -23,10 +23,21 @@
  * questions.
  */
 
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2025, 2025 All Rights Reserved
+ * ===========================================================================
+ */
+
 #include "jni.h"
 #include "jvm.h"
 #include "jni_util.h"
 
+#include "j9access.h"
+/* tracehelp.c defines getTraceInterfaceFromVM(), used by J9_UTINTERFACE_FROM_VM(). */
+#include "tracehelp.c"
+#include "ut_jcl_nio.c"
+
 JNIEXPORT jint JNICALL
 DEF_JNI_OnLoad(JavaVM *vm, void *reserved)
 {
@@ -36,5 +47,7 @@ DEF_JNI_OnLoad(JavaVM *vm, void *reserved)
         return JNI_EVERSION; /* JNI version not supported */
     }
 
+    UT_JCL_NIO_MODULE_LOADED(J9_UTINTERFACE_FROM_VM((J9JavaVM *)vm));
+
     return JNI_VERSION_1_2;
 }

src/java.base/unix/native/libjava/UnixFileSystem_md.c

@@ -23,6 +23,12 @@
  * questions.
  */
 
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2025, 2025 All Rights Reserved
+ * ===========================================================================
+ */
+
 #include <unistd.h>
 #include <assert.h>
 #include <sys/types.h>
@@ -51,6 +57,8 @@
 #include "java_io_FileSystem.h"
 #include "java_io_UnixFileSystem.h"
 
+#include "ut_jcl_java.h"
+
 #if defined(_AIX)
   #if !defined(NAME_MAX)
     #define NAME_MAX MAXNAMLEN
@@ -268,6 +276,7 @@ Java_java_io_UnixFileSystem_createFileExclusively0(JNIEnv *env, jclass cls,
                 if (errno != EEXIST)
                     JNU_ThrowIOExceptionWithLastError(env, "Could not open file");
             } else {
+                Trc_io_UnixFileSystem_createFileExclusively_close(fd);
                 if (close(fd) == -1)
                     JNU_ThrowIOExceptionWithLastError(env, "Could not close file");
                 rv = JNI_TRUE;

src/java.base/unix/native/libjava/io_util_md.c

@@ -22,6 +22,13 @@
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
+
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2025, 2025 All Rights Reserved
+ * ===========================================================================
+ */
+
 #include "jni.h"
 #include "jni_util.h"
 #include "jvm.h"
@@ -39,6 +46,8 @@
 #include <sys/stat.h>
 #endif
 
+#include "ut_jcl_java.h"
+
 #ifdef MACOSX
 
 #include <CoreFoundation/CoreFoundation.h>
@@ -90,6 +99,11 @@ handleOpen(const char *path, int oflag, int mode) {
             fd = -1;
         }
     }
+    if (-1 == fd) {
+        Trc_io_handleOpen_err(path, oflag, mode, 0, 0, errno);
+    } else {
+        Trc_io_handleOpen(path, oflag, mode, 0, 0, (jlong)fd);
+    }
     return fd;
 }
 
@@ -167,6 +181,7 @@ fileDescriptorClose(JNIEnv *env, jobject this)
             dup2(devnull, fd);
             close(devnull);
         }
+        Trc_io_fileDescriptorClose((jlong)fd);
     } else {
         int result;
 #if defined(_AIX)
@@ -176,7 +191,10 @@ fileDescriptorClose(JNIEnv *env, jobject this)
         result = close(fd);
 #endif
         if (result == -1 && errno != EINTR) {
+            Trc_io_fileDescriptorClose_err((jlong)fd, errno);
             JNU_ThrowIOExceptionWithLastError(env, "close failed");
+        } else {
+            Trc_io_fileDescriptorClose((jlong)fd);
         }
     }
 }

src/java.base/unix/native/libnio/ch/Net.c

@@ -23,6 +23,12 @@
  * questions.
  */
 
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2025, 2025 All Rights Reserved
+ * ===========================================================================
+ */
+
 #include <poll.h>
 #include <sys/ioctl.h>
 #include <sys/types.h>
@@ -31,6 +37,7 @@
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 #include <limits.h>
+#include <arpa/inet.h>
 
 #include "jni.h"
 #include "jni_util.h"
@@ -47,6 +54,8 @@
 #include <sys/utsname.h>
 #endif
 
+#include "ut_jcl_nio.h"
+
 /**
  * IP_MULTICAST_ALL supported since 2.6.31 but may not be available at
  * build time.
@@ -380,12 +389,22 @@ Java_sun_nio_ch_Net_connect0(JNIEnv *env, jclass clazz, jboolean preferIPv6,
     SOCKETADDRESS sa;
     int sa_len = 0;
     int rv;
+    int fd;
 
     if (NET_InetAddressToSockaddr(env, iao, port, &sa, &sa_len, preferIPv6) != 0) {
         return IOS_THROWN;
     }
 
-    rv = connect(fdval(env, fdo), &sa.sa, sa_len);
+    fd = fdval(env, fdo);
+    if (AF_INET == sa.sa4.sin_family) {
+        char buf[INET_ADDRSTRLEN];
+        Trc_nio_ch_Net_connect4((jlong)fd, inet_ntop(AF_INET, &sa.sa4.sin_addr, buf, sizeof(buf)), port, sa_len);
+    } else if (AF_INET6 == sa.sa6.sin6_family) {
+        char buf[INET6_ADDRSTRLEN];
+        Trc_nio_ch_Net_connect6((jlong)fd, inet_ntop(AF_INET6, &sa.sa6.sin6_addr, buf, sizeof(buf)), port, ntohl(sa.sa6.sin6_scope_id), sa_len);
+    }
+
+    rv = connect(fd, &sa.sa, sa_len);
     if (rv != 0) {
         if (errno == EINPROGRESS) {
             return IOS_UNAVAILABLE;

src/java.base/unix/native/libnio/ch/UnixDispatcher.c

@@ -23,11 +23,19 @@
  * questions.
  */
 
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2025, 2025 All Rights Reserved
+ * ===========================================================================
+ */
+
 #include "nio.h"
 #include "nio_util.h"
 
 #include "sun_nio_ch_UnixDispatcher.h"
 
+#include "ut_jcl_nio.h"
+
 static int preCloseFD = -1;     /* File descriptor to which we dup other fd's
                                    before closing them for real */
 
@@ -55,6 +63,7 @@ JNIEXPORT void JNICALL
 Java_sun_nio_ch_UnixDispatcher_close0(JNIEnv *env, jclass clazz, jobject fdo)
 {
     jint fd = fdval(env, fdo);
+    Trc_nio_ch_UnixDispatcher_close(fd);
     closeFileDescriptor(env, fd);
 }
 

src/java.base/unix/native/libnio/ch/UnixDomainSockets.c

@@ -23,6 +23,12 @@
  * questions.
  */
 
+/*
+ * ===========================================================================
+ * (c) Copyright IBM Corp. 2025, 2025 All Rights Reserved
+ * ===========================================================================
+ */
+
 #include <poll.h>
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -41,6 +47,8 @@
 #include "nio_util.h"
 #include "nio.h"
 
+#include "ut_jcl_nio.h"
+
 /* Subtle platform differences in how unnamed sockets (empty path)
  * are returned from getsockname()
  */
@@ -132,12 +140,16 @@ Java_sun_nio_ch_UnixDomainSockets_connect0(JNIEnv *env, jclass clazz, jobject fd
     struct sockaddr_un sa;
     int sa_len = 0;
     int rv;
+    int fd;
 
     if (unixSocketAddressToSockaddr(env, path, &sa, &sa_len) != 0) {
         return IOS_THROWN;
     }
 
-    rv = connect(fdval(env, fdo), (struct sockaddr *)&sa, sa_len);
+    fd = fdval(env, fdo);
+    Trc_nio_ch_UnixDomainSockets_connect(fd, sa.sun_path, sa_len);
+
+    rv = connect(fd, (struct sockaddr *)&sa, sa_len);
     if (rv != 0) {
         if (errno == EINPROGRESS) {
             return IOS_UNAVAILABLE;