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Make sure gdb is ready to receive commnad

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before creating the MISession.
This commit is contained in:
Alain Magloire 2003-09-26 16:58:24 +00:00
parent 8bc64c6f3c
commit 82e8f08353
1 changed files with 81 additions and 3 deletions
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84
debug/org.eclipse.cdt.debug.mi.core/src/org/eclipse/cdt/debug/mi/core/MIPlugin.java
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@ -4,8 +4,12 @@
*/
package org.eclipse.cdt.debug.mi.core;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.text.MessageFormat;
import org.eclipse.cdt.debug.core.cdi.ICDISession;
@ -131,7 +135,8 @@ public class MIPlugin extends Plugin {
}
}
Process pgdb = ProcessFactory.getFactory().exec(args);
Process pgdb = getGDBProcess(args, program);
MISession session;
try {
session = createMISession(pgdb, pty, MISession.PROGRAM);
@ -181,7 +186,7 @@ public class MIPlugin extends Plugin {
} else {
args = new String[] {gdb, "--cd="+cwd.getAbsolutePath(), "--command="+gdbinit, "--quiet", "-nw", "-i", "mi1", "-c", core.getAbsolutePath(), program.getAbsolutePath()};
}
Process pgdb = ProcessFactory.getFactory().exec(args);
Process pgdb = getGDBProcess(args, program);
MISession session;
try {
session = createMISession(pgdb, null, MISession.CORE);
@ -214,7 +219,7 @@ public class MIPlugin extends Plugin {
} else {
args = new String[] {gdb, "--cd="+cwd.getAbsolutePath(), "--command="+gdbinit, "--quiet", "-nw", "-i", "mi1", program.getAbsolutePath()};
}
Process pgdb = ProcessFactory.getFactory().exec(args);
Process pgdb = getGDBProcess(args, program);
MISession session;
try {
session = createMISession(pgdb, null, MISession.ATTACH);
@ -283,6 +288,79 @@ public class MIPlugin extends Plugin {
}
}
/**
* Retrieve the session timeout.
*
* Allow at least one second per megabyte as a minimum on the timeout
* (note one second is an arbitrary choice based on swapping performance).
* This is required for loading the symbols from very large programs.
*/
private int getAdjustedTimeout(File program) {
Preferences prefs = plugin.getPluginPreferences();
int timeout = prefs.getInt(IMIConstants.PREF_REQUEST_TIMEOUT); //milliseconds
if(program != null && program.exists()) {
long programSize = program.length();
int minimumTimeout = (int)(programSize / 1000L);
if(timeout < minimumTimeout) {
//debugLog("Adjusting timeout from " + timeout + "ms to " + minimumTimeout + "ms");
timeout = minimumTimeout;
}
}
return timeout;
}
/**
* Do some basic synchronisation, gdb make take some time to load
* for whatever reasons.
* @param args
* @param program
* @return Process
* @throws IOException
*/
protected Process getGDBProcess(String[] args, File program) throws IOException {
final Process pgdb = ProcessFactory.getFactory().exec(args);
Thread syncStartup = new Thread("GDB Start") {
public void run() {
try {
String line;
InputStream stream = pgdb.getInputStream();
Reader r = new InputStreamReader(stream);
BufferedReader reader = new BufferedReader(r);
while ((line = reader.readLine()) != null) {
line = line.trim();
//System.out.println("GDB " + line);
if (line.startsWith("(gdb)")) {
break;
}
}
} catch (Exception e) {
// Do nothing
}
synchronized (pgdb) {
pgdb.notifyAll();
}
}
};
syncStartup.start();
synchronized (pgdb) {
int timeout = getAdjustedTimeout(program);
while (syncStartup.isAlive()) {
try {
pgdb.wait(timeout);
break;
} catch (InterruptedException e) {
}
}
}
try {
syncStartup.interrupt();
syncStartup.join(1000);
} catch (InterruptedException e) {
}
return pgdb;
}
/* (non-Javadoc)
* @see org.eclipse.core.runtime.Plugin#startup()
*/