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KUBOTA Yuji ykubota

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@ykubota
ykubota / StreamWithIndex.java
Last active August 29, 2015 14:23
# streams: some indexable collection
IntStream.range(0, streams.size())
.forEach(index ->
some.process(
index,
streams.get(index)
)
);
@ykubota
ykubota / Dump.java
Last active September 3, 2015 01:13
dump JavaFX Node struct to show all Java classes and css style classes.
import javafx.scene.Node;
import javafx.scene.Parent;
// :
private void dump(Node n, int depth) {
for (int i = 0; i < depth; i++) System.out.print(" ");
System.out.println(n);
if (n instanceof Parent) for (Node c: ((Parent) n).getChildrenUnmodifiable()) dump(c, depth + 1);
}
// :
@ykubota
ykubota / HelloWorld.scala
Created October 14, 2015 13:15
Scala + HeapStats
object HelloWorld {
def main(args: Array[String]) {
println("Hello, world!")
}
}
@ykubota
ykubota / make.sh
Last active October 19, 2015 12:45
ThreadRecorder + DeadLock 検知を試してみる
sudo dnf install -y --enablerepo="*debug*" hg net-snmp net-snmp-devel gcc gcc-c++ binutils binutils-devel maven ant java-1.8.0-openjdk java-1.8.0-openjdk-devel java-1.8.0-openjdk-debuginfo
hg clone http://icedtea.classpath.org/hg/heapstats
cd heapstats/
./configure; make agent
sed -e "s/thread_record_enable=false/thread_record_enable=true/" agent/heapstats.conf > agent/heapstats_threadrecorder.conf
cd agent/test/deadlock
javac DLSample.java
java -agentpath:../../src/libheapstats.so=../../heapstats_threadrecorder.conf DLSample 5
@ykubota
ykubota / spec_2.0.patch
Created October 20, 2015 13:51
Bump to 2.0. (agent/mbean)
This file has been truncated, but you can view the full file.
diff -r d284ec1e1226 Makefile.am
--- a/Makefile.am Wed Oct 14 10:43:58 2015 +0900
+++ b/Makefile.am Tue Oct 20 16:54:18 2015 +0900
@@ -26,14 +26,14 @@
install-exec-local:
$(mkdir_p) $(DESTDIR)/$(libexecdir)
$(mkdir_p) $(DESTDIR)/$(libexecdir)/lib
- $(INSTALL_DATA) $(ANALYZER_DIR)/THIRD_PARTY_README $(DESTDIR)/$(libexecdir)
- $(INSTALL_DATA) $(ANALYZER_DIR)/heapstats-analyzer.jar $(DESTDIR)/$(libexecdir)
- $(INSTALL_DATA) $(ANALYZER_DIR)/filterDefine.xsd $(DESTDIR)/$(libexecdir)
@ykubota
ykubota / execute.md
Last active October 27, 2015 17:10
Jigsaw jdeps/jlink demo's command

  • jdeps -M -s lib/*

  • jdeps -genmoduleinfo msrc lib/*

    • msrc//module-info.java
    • requires / exports / provides 修飾子

  • jdeps -R -cp lib/* lib/(what_you_want).jar

  • jdeps -s -R -cp lib/* lib/(what_you_want).jar

  • jdeps -s -ct -R -cp lib/* lib/(what_you_want).jar

  • jlink --help

  • jlink --modulepath $JMODS --addmods java.base --output yimage --exclude-files *.diz

@ykubota
ykubota / Usage.md
Last active November 10, 2021 08:10
Get specified jdk8 version sources from openjdk repository

Usage

bash get_specified_source.sh jdk8u77

Note: This script does not validate the input.

@ykubota
ykubota / sample.gdb
Created July 26, 2016 07:33
check address of counter and its member
set logging on
set logging file /path/to/file
f 7
p/x counter
p/x counter->objData
p/x (TObjectData *)counter->objData
p/x counter->objData->klassOop
@ykubota
ykubota / core.2832 (bt)
Last active July 6, 2017 02:23
TBB crash log
(gdb) bt
#0 0x00007f523e4741d7 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007f523e4758c8 in __GI_abort () at abort.c:90
#2 0x00007f523dda7c89 in os::abort (dump_core=<optimized out>)
at /usr/src/debug/java-1.8.0-openjdk-1.8.0.131-3.b12.el7_3.x86_64/openjdk/hotspot/src/os/linux/vm/os_linux.cpp:1513
#3 0x00007f523df496d6 in VMError::report_and_die (this=this@entry=0x7f51f31f5150)
at /usr/src/debug/java-1.8.0-openjdk-1.8.0.131-3.b12.el7_3.x86_64/openjdk/hotspot/src/share/vm/utilities/vmError.cpp:1060
#4 0x00007f523ddb1347 in JVM_handle_linux_signal (sig=11, info=0x7f51f31f53f0, ucVoid=0x7f51f31f52c0,
abort_if_unrecognized=<optimized out>)
at /usr/src/debug/java-1.8.0-openjdk-1.8.0.131-3.b12.el7_3.x86_64/openjdk/hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp:541
@ykubota
ykubota / gdb-2763.log
Created July 7, 2017 00:13
crash by a73e611
#0 0x00007f47efbb21d7 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007f47efbb38c8 in __GI_abort () at abort.c:90
#2 0x00007f47ef4e5c89 in os::abort (dump_core=<optimized out>)
at /usr/src/debug/java-1.8.0-openjdk-1.8.0.131-3.b12.el7_3.x86_64/openjdk/hotspot/src/os/linux/vm/os_linux.cpp:1513
#3 0x00007f47ef6876d6 in VMError::report_and_die (this=this@entry=0x7f47d6749da0)
at /usr/src/debug/java-1.8.0-openjdk-1.8.0.131-3.b12.el7_3.x86_64/openjdk/hotspot/src/share/vm/utilities/vmError.cpp:1060
#4 0x00007f47ef687d97 in crash_handler (sig=11, info=0x7f47d6749ff0, ucVoid=0x7f47d6749ec0)
at /usr/src/debug/java-1.8.0-openjdk-1.8.0.131-3.b12.el7_3.x86_64/openjdk/hotspot/src/os/linux/vm/vmError_linux.cpp:106
#5 <signal handler called>
#6 os::is_first_C_frame (fr=fr@entry=0x7f47d674aaa0)