From: Mathieu Desnoyers Date: Fri, 26 Aug 2011 11:23:16 +0000 (-0400) Subject: Add TRACEPOINT_EVENT java instrumentation wrapper X-Git-Tag: v1.9.1~240 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=2b6f8df951cb74149a9ab9c5146e6dd8498b9e87;p=lttng-ust.git Add TRACEPOINT_EVENT java instrumentation wrapper Signed-off-by: Mathieu Desnoyers --- diff --git a/Makefile.am b/Makefile.am index 4f5ae8c1..f294cf35 100644 --- a/Makefile.am +++ b/Makefile.am @@ -5,7 +5,8 @@ ACLOCAL_AMFLAGS = -I config # libust and '.' (that contains the linker script). However, '.' # must be installed after libust so it can overwrite libust.so with # the linker script. -SUBDIRS = snprintf liblttng-ust-comm libringbuffer libust include doc tests +SUBDIRS = snprintf liblttng-ust-comm libringbuffer libust include doc tests \ + java #temporarily disabled # . libustinstr-malloc libustfork diff --git a/README b/README index 635f9c1b..901e1751 100644 --- a/README +++ b/README @@ -122,3 +122,4 @@ PACKAGE CONTENTS: - java A simple library that uses JNI to allow tracing in java programs. + See java/README for build instructions. diff --git a/configure.ac b/configure.ac index ce24a1a2..dbfdecde 100644 --- a/configure.ac +++ b/configure.ac @@ -135,6 +135,36 @@ if test x$NO_UNALIGNED_ACCESS = x ; then AC_DEFINE([HAVE_EFFICIENT_UNALIGNED_ACCESS], [1]) fi +# Set compile flags to java include files if given +AC_ARG_WITH(java_jdk, [ --with-java-jdk=DIR use java jdk from DIR. Ex : $JAVA_HOME.], JAVA_SDK=$withval,) +if test $JAVA_SDK; then + if test -d $JAVA_SDK; then + AC_MSG_RESULT([using java include in $JAVA_SDK]) + SUBDIRS=`find $JAVA_SDK/include -type d` + CFLAGS+=" " + CFLAGS+=`for x in $SUBDIRS; do echo -n "-I$x "; done` + CFLAGS+=" " + else + AC_MSG_ERROR(Unable to find java include file in $JAVA_JDK) + fi +fi + +# Check for JNI header files if requested +AC_ARG_WITH(jni-interface, [ --with-jni-interface build JNI interface between C and java. Need java include files. + [[default=no]]]) + +if test -z "$with_jni_interface"; then + with_jni_interface=${with_jni_interface_default-no} +fi + +if test "$with_jni_interface" = "yes"; then + AC_CHECK_HEADERS([jni.h],,AC_MSG_ERROR([ +missing jni.h +Make sure Sun Java, OpenJDK or GCJ is installed and that this header file exists in the system path. +Use --with-java-jdk=DIR flag to point to your java include files or desactivate the JNI interface.])) +fi +AM_CONDITIONAL(BUILD_JNI_INTERFACE, test "$with_jni_interface" = "yes") + AC_CONFIG_FILES([ Makefile doc/Makefile @@ -167,5 +197,6 @@ AC_CONFIG_FILES([ snprintf/Makefile ust.pc include/ust/version.h + java/Makefile ]) AC_OUTPUT diff --git a/java/Makefile.am b/java/Makefile.am index 4dcb0c3a..cb2c1b89 100644 --- a/java/Makefile.am +++ b/java/Makefile.am @@ -1,7 +1,9 @@ +if BUILD_JNI_INTERFACE + AM_CPPFLAGS = -I$(top_srcdir)/include lib_LTLIBRARIES = libustjava.la -libustjava_la_SOURCES = UST.c UST.h +libustjava_la_SOURCES = UST.c UST.h ust_java.h dist_noinst_DATA = UST.java libustjava_la_LIBADD = -lc -L$(top_builddir)/libust/.libs -lust @@ -13,5 +15,7 @@ clean-local: UST.class: UST.java javac -d "$(builddir)" "$(srcdir)/UST.java" -UST.h: +UST.h: UST.class javah -jni UST + +endif diff --git a/java/README b/java/README index 358866fe..ecc27ef6 100644 --- a/java/README +++ b/java/README @@ -1,3 +1,15 @@ This directory contains a simple API for instrumenting java applications. -Look at the example in the tests/java directory for usage. +Configuration examples to build this library: + +dependency: sun-java6-jdk +./configure --with-java-jdk=/usr/lib/jvm/java-6-sun --with-jni-interface + +dependency: openjdk-6-jdk +./configure --with-java-jdk=/usr/lib/jvm/java-6-openjdk --with-jni-interface + +dependency: gcj-4.4-jdk +./configure --with-java-jdk=/usr/lib/jvm/java-gcj --with-jni-interface + +Our testing shows that sun java6 and openjdk 6 build fine, but not gcj +4.4. diff --git a/java/UST.c b/java/UST.c index 0904ad2e..84b7393a 100644 --- a/java/UST.c +++ b/java/UST.c @@ -1,13 +1,17 @@ #include -#include -JNIEXPORT void JNICALL Java_UST_ust_1java_1event (JNIEnv *env, jobject jobj, jstring ev_name, jstring args) +#define TRACEPOINT_CREATE_PROBES +#include "ust_java.h" + +JNIEXPORT void JNICALL Java_UST_ust_1java_1event (JNIEnv *env, jobject jobj, + jstring ev_name, jstring args) { jboolean iscopy; - const char *ev_name_cstr = (*env)->GetStringUTFChars(env, ev_name, &iscopy); + const char *ev_name_cstr = (*env)->GetStringUTFChars(env, ev_name, + &iscopy); const char *args_cstr = (*env)->GetStringUTFChars(env, args, &iscopy); - ust_marker(ust, java_event, "name %s args %s", ev_name_cstr, args_cstr); + tracepoint(ust_java_event, ev_name_cstr, args_cstr); } -UST_MARKER_LIB +TRACEPOINT_LIB diff --git a/java/ust_java.h b/java/ust_java.h new file mode 100644 index 00000000..366b3737 --- /dev/null +++ b/java/ust_java.h @@ -0,0 +1,44 @@ +#undef TRACEPOINT_SYSTEM +#define TRACEPOINT_SYSTEM ust_java + +#if !defined(_TRACEPOINT_UST_JAVA_H) || defined(TRACEPOINT_HEADER_MULTI_READ) +#define _TRACEPOINT_UST_JAVA_H + +/* + * Copyright (C) 2011 Mathieu Desnoyers + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; version 2.1 of + * the License. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +TRACEPOINT_EVENT(ust_java_event, + TP_PROTO(const char *name, const char *args), + TP_ARGS(name, args), + TP_FIELDS( + ctf_string(name, name) + ctf_string(args, args) + ) +) + +#endif /* _TRACEPOINT_UST_JAVA_H */ + +#undef TRACEPOINT_INCLUDE_PATH +#define TRACEPOINT_INCLUDE_PATH . +#undef TRACEPOINT_INCLUDE_FILE +#define TRACEPOINT_INCLUDE_FILE ust_java + +/* This part must be outside protection */ +#include