[HARMONY-1194] [classlib][nio] unexpected "Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[xxx]" messages

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Component/s: Classlib
• Assignee: Tim Ellison
• Reporter: Vladimir Bossicard
• Created: 15/Aug/06 12:15
• Updated: 25/Apr/07 11:14
• Resolved: 24/Apr/07 11:14

Description

The test below report on the 2CPU computers messages like this
"Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[159703592]"

Note, on 1 CPU it works fine. I did not detect problem yet so continue to investigate.

============================= test.java ===========================
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class test {

public int NUMBER_OF_ITERATIONS = 10000;
public int NUMBER_OF_BYTE_BUFFERS = 3;
public int bufferSize = 1024;
public int numThreads = 15;

// Each thread sets PASS/FAIL flag into its corresponding array element
public int[] statuses;

public static void main(String[] args)

{ System.exit(new test().test(args)); }

public int test(String[] params) {
// Start 'numThreads' threads each reading from file, inflating/deflating
Thread[] t = new Thread[numThreads];
statuses = new int[t.length];

for (int i = 0; i < t.length; i++)

{ t[i] = new Thread(new ChannelWriteThread(i, this)); t[i].start(); System.out.println("Thread " + i + " started"); }

// wait for all threads to finish
for (int i = 0; i < t.length; ++i){
try

{ t[i].join(); System.out.println("Thread " + i + ": joined() "); }

catch (InterruptedException ie)

{ System.out.println("interruptedException while join() of thread #" + i); return -1; }

}

// check status
for (int i = 0; i < statuses.length; ++i){
if (statuses[i] != 10)

{ System.out.println("thread #" + i + " returned not PASS status"); return -1; }

}
System.out.println("OK");
return 0;
}
}

class ChannelWriteThread implements Runnable {

public int id;
public test base;

public ChannelWriteThread(int id, test base)

{ this.id = id; this.base = base; }

public void run() {
FileOutputStream fos = null;
FileChannel channel = null;

try

{ File file = File.createTempFile("test", null); file.deleteOnExit(); fos = new FileOutputStream(file); channel = fos.getChannel(); }

catch (IOException e)

{ e.printStackTrace(); }

base.statuses[id] = 10;
ByteBuffer[] buffer = new ByteBuffer[base.NUMBER_OF_BYTE_BUFFERS];

for (int i = 0; i < base.NUMBER_OF_ITERATIONS; ++i) {
for(int j = 0; j < base.NUMBER_OF_BYTE_BUFFERS; j++)

{ buffer[j] = ByteBuffer.allocate(2 * base.bufferSize); }

buffer[0].flip();
try

{ channel.write(buffer); }

catch (IOException e)

{ base.statuses[id] = -1; System.out.println("Thread " + id + " : IOException while buffer writing"); }

buffer[0].clear();
}
try

{ channel.close(); fos.close(); }

catch (IOException e)

{ base.statuses[id] = -1; System.out.println("Thread " + id + " : IOException while closing"); }

}
}
===============================================================

Output (for 4 CPU comp):
Y:\site\proj\drl\qe\my>inaries\builds\combined\20060815\Harmony-drlvm_20060815_win_ia32_0000_msvc\bin\java.exe -Dvm.assert_dialog=false -cp . -showversion test
java version "1.5.0"
pre-alpha : not complete or compatible
svn = rsvn: '.' is not a working copy, (Aug 15 2006), Windows/ia32/msvc 1310, debug build
http://incubator.apache.org/harmony
Thread 0 started
Thread 1 started
Thread 2 started
Thread 3 started
Thread 4 started
Thread 5 started
Thread 6 started
Thread 7 started
Thread 8 started
Thread 9 started
Thread 10 started
Thread 11 started
Thread 12 started
Thread 13 started
Thread 14 started
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[187955296]
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[161934880]
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[175398240]
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[168220896]
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[161925840]
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[172589448]
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[190659456]
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[200620192]
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[171946168]
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[192747808]
Thread 0: joined()
Memory Spy! Fixed attempt to free memory that was not allocated PlatformAddress[172558608]
Thread 1: joined()
Thread 2: joined()
Thread 3: joined()
Thread 4: joined()
Thread 5: joined()
Thread 6: joined()
Thread 7: joined()
Thread 8: joined()
Thread 9: joined()
Thread 10: joined()
Thread 11: joined()
Thread 12: joined()
Thread 13: joined()
Thread 14: joined()
OK