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[java] AppMain improvements: ability to operate as a Java agent

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This commit is contained in:
Roman Shevchenko
2016-10-27 16:25:45 +02:00
parent fae03c518d
commit 8792384ef6
3 changed files with 89 additions and 66 deletions
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java/java-runtime/src/META-INF/MANIFEST.MF
+1
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@@ -0,0 +1 @@
Premain-Class: com.intellij.rt.execution.application.AppMain
java/java-runtime/src/com/intellij/rt/execution/application/AppMain.java
+63 -52
View File
@@ -36,68 +36,79 @@ public class AppMain {
private static native void triggerControlBreak();
private static final boolean ourHelperLibLoaded;
static {
boolean libLoaded = false;
try {
String osName = System.getProperty("os.name").toLowerCase(Locale.US);
if (osName.startsWith("windows")) {
String arch = System.getProperty("os.arch").toLowerCase(Locale.US);
String libName = arch.equals("amd64") ? "breakgen64.dll" : "breakgen.dll";
File libFile = new File(System.getProperty(PROPERTY_BIN_PATH), libName);
if (libFile.isFile()) {
System.load(libFile.getAbsolutePath());
libLoaded = true;
}
private static boolean loadHelper(String binPath) {
String osName = System.getProperty("os.name").toLowerCase(Locale.US);
if (osName.startsWith("windows")) {
String arch = System.getProperty("os.arch").toLowerCase(Locale.US);
File libFile = new File(binPath, arch.equals("amd64") ? "breakgen64.dll" : "breakgen.dll");
if (libFile.isFile()) {
System.load(libFile.getAbsolutePath());
return true;
}
}
return false;
}
private static void startMonitor(final int portNumber, final boolean helperLibLoaded) {
Thread t = new Thread("Monitor Ctrl-Break") {
public void run() {
try {
Socket client = new Socket("127.0.0.1", portNumber);
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), "US-ASCII"));
try {
while (true) {
String msg = reader.readLine();
if ("TERM".equals(msg)) {
return;
}
else if ("BREAK".equals(msg)) {
if (helperLibLoaded) {
triggerControlBreak();
}
}
else if ("STOP".equals(msg)) {
System.exit(1);
}
}
}
finally {
reader.close();
}
}
finally {
client.close();
}
}
catch (Exception ignored) { }
}
};
t.setDaemon(true);
t.start();
}
public static void premain(String args) {
try {
int p = args.indexOf(':');
if (p < 0) throw new IllegalArgumentException("incorrect parameter: " + args);
boolean helperLibLoaded = loadHelper(args.substring(p + 1));
int portNumber = Integer.parseInt(args.substring(0, p));
startMonitor(portNumber, helperLibLoaded);
}
catch (Throwable t) {
System.out.println("Thread dumps in console not supported: failed to load a native helper (" + t.getMessage() + ')');
System.err.println("Launcher failed - \"Dump Threads\" and \"Exit\" actions are unavailable (" + t.getMessage() + ')');
}
ourHelperLibLoaded = libLoaded;
}
public static void main(String[] args) throws Throwable {
try {
final int portNumber = Integer.getInteger(PROPERTY_PORT_NUMBER).intValue();
Thread t = new Thread("Monitor Ctrl-Break") {
public void run() {
try {
Socket client = new Socket("127.0.0.1", portNumber);
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream(), "US-ASCII"));
try {
while (true) {
String msg = reader.readLine();
if ("TERM".equals(msg)) {
return;
}
else if ("BREAK".equals(msg)) {
if (ourHelperLibLoaded) {
triggerControlBreak();
}
}
else if ("STOP".equals(msg)) {
System.exit(1);
}
}
}
finally {
reader.close();
}
}
finally {
client.close();
}
}
catch (Exception ignored) { }
}
};
t.setDaemon(true);
t.start();
boolean helperLibLoaded = loadHelper(System.getProperty(PROPERTY_BIN_PATH));
int portNumber = Integer.parseInt(System.getProperty(PROPERTY_PORT_NUMBER));
startMonitor(portNumber, helperLibLoaded);
}
catch (Throwable t) {
System.out.println("Thread dumps and \"soft exit\" not supported: failed to start a monitor thread (" + t.getMessage() + ')');
System.err.println("Launcher failed - \"Dump Threads\" and \"Exit\" actions are unavailable (" + t.getMessage() + ')');
}
String mainClass = args[0];