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提交 fcd0cf3c 编写于 作者: D dcubed
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8046287: [TESTBUG] runtime/Thread/TestThreadDumpMonitorContention.java failed error_cnt=12 

Summary: Added a new header waiting pattern to catch the case where the target thread waiting on a condition (like a VM op); several other test improvements
Reviewed-by: sspitsyn, dholmes
上级 d3828836
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Showing with 169 addition and 40 deletion
test/runtime/Thread/TestThreadDumpMonitorContention.java
浏览文件 @ fcd0cf3c
......@@ -24,6 +24,7 @@
/*
* @test
* @bug 8036823
* @bug 8046287
* @summary Creates two threads contending for the same lock and checks
* whether jstack reports "locked" by more than one thread.
*
......@@ -52,10 +53,13 @@ public class TestThreadDumpMonitorContention {
// looking for header lines with these patterns:
// "ContendingThread-1" #19 prio=5 os_prio=64 tid=0x000000000079c000 nid=0x23 runnable [0xffff80ffb8b87000]
// "ContendingThread-2" #21 prio=5 os_prio=64 tid=0x0000000000780000 nid=0x2f waiting for monitor entry [0xfffffd7fc1111000]
// "ContendingThread-2" #24 prio=5 os_prio=64 tid=0x0000000000ec8800 nid=0x31 waiting on condition [0xfffffd7bbfffe000]
final static Pattern HEADER_PREFIX_PATTERN = Pattern.compile(
"^\"ContendingThread-.*");
final static Pattern HEADER_WAITING_PATTERN = Pattern.compile(
final static Pattern HEADER_WAITING_PATTERN1 = Pattern.compile(
"^\"ContendingThread-.* waiting for monitor entry .*");
final static Pattern HEADER_WAITING_PATTERN2 = Pattern.compile(
"^\"ContendingThread-.* waiting on condition .*");
final static Pattern HEADER_RUNNABLE_PATTERN = Pattern.compile(
"^\"ContendingThread-.* runnable .*");
......@@ -80,17 +84,34 @@ public class TestThreadDumpMonitorContention {
final static Pattern WAITING_PATTERN = Pattern.compile(
".* waiting to lock \\<.*\\(a TestThreadDumpMonitorContention.*");
final static Object barrier = new Object();
volatile static boolean done = false;
static int barrier_cnt = 0;
static int blank_line_match_cnt = 0;
static int error_cnt = 0;
static String header_line = null;
static boolean have_header_line = false;
static boolean have_thread_state_line = false;
static int match_cnt = 0;
static String[] match_list = new String[2];
static String header_line = null;
static int header_prefix_match_cnt = 0;
static int locked_line_match_cnt = 0;
static String[] locked_match_list = new String[2];
static int n_samples = 15;
static int sum_both_running_cnt = 0;
static int sum_both_waiting_cnt = 0;
static int sum_contended_cnt = 0;
static int sum_locked_hdr_runnable_cnt = 0;
static int sum_locked_hdr_waiting1_cnt = 0;
static int sum_locked_hdr_waiting2_cnt = 0;
static int sum_locked_thr_state_blocked_cnt = 0;
static int sum_locked_thr_state_runnable_cnt = 0;
static int sum_one_waiting_cnt = 0;
static int sum_uncontended_cnt = 0;
static int sum_waiting_hdr_waiting1_cnt = 0;
static int sum_waiting_thr_state_blocked_cnt = 0;
static String thread_state_line = null;
static boolean verbose = false;
static int waiting_line_match_cnt = 0;
public static void main(String[] args) throws Exception {
if (args.length != 0) {
......@@ -110,6 +131,11 @@ public class TestThreadDumpMonitorContention {
Runnable runnable = new Runnable() {
public void run() {
synchronized (barrier) {
// let the main thread know we're running
barrier_cnt++;
barrier.notify();
}
while (!done) {
synchronized (this) { }
}
......@@ -118,9 +144,17 @@ public class TestThreadDumpMonitorContention {
Thread[] thread_list = new Thread[2];
thread_list[0] = new Thread(runnable, "ContendingThread-1");
thread_list[1] = new Thread(runnable, "ContendingThread-2");
synchronized (barrier) {
thread_list[0].start();
thread_list[1].start();
// Wait until the contending threads are running so that
// we don't sample any thread init states.
while (barrier_cnt < 2) {
barrier.wait();
}
}
doSamples();
done = true;
......@@ -143,11 +177,12 @@ public class TestThreadDumpMonitorContention {
// Example:
// "ContendingThread-1" #21 prio=5 os_prio=64 tid=0x00000000007b9000 nid=0x2f runnable [0xfffffd7fc1111000]
// java.lang.Thread.State: RUNNABLE
// at TestThreadDumpMonitorContention$1.run(TestThreadDumpMonitorContention.java:67)
// at TestThreadDumpMonitorContention$1.run(TestThreadDumpMonitorContention.java:140)
// at java.lang.Thread.run(Thread.java:745)
//
static boolean checkBlankLine(String line) {
if (line.length() == 0) {
blank_line_match_cnt++;
have_header_line = false;
have_thread_state_line = false;
return true;
......@@ -161,49 +196,73 @@ public class TestThreadDumpMonitorContention {
// Example 1:
// "ContendingThread-1" #21 prio=5 os_prio=64 tid=0x00000000007b9000 nid=0x2f runnable [0xfffffd7fc1111000]
// java.lang.Thread.State: RUNNABLE
// at TestThreadDumpMonitorContention$1.run(TestThreadDumpMonitorContention.java:67)
// at TestThreadDumpMonitorContention$1.run(TestThreadDumpMonitorContention.java:140)
// - locked <0xfffffd7e6a2912f8> (a TestThreadDumpMonitorContention$1)
// at java.lang.Thread.run(Thread.java:745)
//
// Example 2:
// "ContendingThread-1" #21 prio=5 os_prio=64 tid=0x00000000007b9000 nid=0x2f waiting for monitor entry [0xfffffd7fc1111000]
// java.lang.Thread.State: BLOCKED (on object monitor)
// at TestThreadDumpMonitorContention$1.run(TestThreadDumpMonitorContention.java:67)
// at TestThreadDumpMonitorContention$1.run(TestThreadDumpMonitorContention.java:140)
// - locked <0xfffffd7e6a2912f8> (a TestThreadDumpMonitorContention$1)
// at java.lang.Thread.run(Thread.java:745)
//
// Example 3:
// "ContendingThread-2" #24 prio=5 os_prio=64 tid=0x0000000000ec8800 nid=0x31 waiting on condition [0xfffffd7bbfffe000]
// java.lang.Thread.State: RUNNABLE
// JavaThread state: _thread_blocked
// Thread: 0x0000000000ec8800 [0x31] State: _at_safepoint _has_called_back 0 _at_poll_safepoint 0
// JavaThread state: _thread_blocked
// at TestThreadDumpMonitorContention$1.run(TestThreadDumpMonitorContention.java:140)
// - locked <0xfffffd7e6d03eb28> (a TestThreadDumpMonitorContention$1)
// at java.lang.Thread.run(Thread.java:745)
//
static boolean checkLockedLine(String line) {
Matcher matcher = LOCK_PATTERN.matcher(line);
if (matcher.matches()) {
if (verbose) {
System.out.println("locked_line='" + line + "'");
}
match_list[match_cnt] = new String(line);
match_cnt++;
locked_match_list[locked_line_match_cnt] = new String(line);
locked_line_match_cnt++;
matcher = HEADER_RUNNABLE_PATTERN.matcher(header_line);
if (!matcher.matches()) {
if (matcher.matches()) {
sum_locked_hdr_runnable_cnt++;
} else {
// It's strange, but a locked line can also
// match the HEADER_WAITING_PATTERN.
matcher = HEADER_WAITING_PATTERN.matcher(header_line);
if (!matcher.matches()) {
// match the HEADER_WAITING_PATTERN{1,2}.
matcher = HEADER_WAITING_PATTERN1.matcher(header_line);
if (matcher.matches()) {
sum_locked_hdr_waiting1_cnt++;
} else {
matcher = HEADER_WAITING_PATTERN2.matcher(header_line);
if (matcher.matches()) {
sum_locked_hdr_waiting2_cnt++;
} else {
System.err.println();
System.err.println("ERROR: header line does " +
"not match runnable or waiting patterns.");
System.err.println("ERROR: header_line='" +
header_line + "'");
System.err.println("ERROR: locked_line='" + line + "'");
System.err.println("ERROR: locked_line='" + line +
"'");
error_cnt++;
}
}
}
matcher = THREAD_STATE_RUNNABLE_PATTERN.matcher(thread_state_line);
if (!matcher.matches()) {
if (matcher.matches()) {
sum_locked_thr_state_runnable_cnt++;
} else {
// It's strange, but a locked line can also
// match the THREAD_STATE_BLOCKED_PATTERN.
matcher = THREAD_STATE_BLOCKED_PATTERN.matcher(
thread_state_line);
if (!matcher.matches()) {
if (matcher.matches()) {
sum_locked_thr_state_blocked_cnt++;
} else {
System.err.println();
System.err.println("ERROR: thread state line does not " +
"match runnable or waiting patterns.");
......@@ -229,19 +288,22 @@ public class TestThreadDumpMonitorContention {
// Example:
// "ContendingThread-2" #22 prio=5 os_prio=64 tid=0x00000000007b9800 nid=0x30 waiting for monitor entry [0xfffffd7fc1010000]
// java.lang.Thread.State: BLOCKED (on object monitor)
// at TestThreadDumpMonitorContention$1.run(TestThreadDumpMonitorContention.java:67)
// at TestThreadDumpMonitorContention$1.run(TestThreadDumpMonitorContention.java:140)
// - waiting to lock <0xfffffd7e6a2912f8> (a TestThreadDumpMonitorContention$1)
// at java.lang.Thread.run(Thread.java:745)
//
static boolean checkWaitingLine(String line) {
Matcher matcher = WAITING_PATTERN.matcher(line);
if (matcher.matches()) {
waiting_line_match_cnt++;
if (verbose) {
System.out.println("waiting_line='" + line + "'");
}
matcher = HEADER_WAITING_PATTERN.matcher(header_line);
if (!matcher.matches()) {
matcher = HEADER_WAITING_PATTERN1.matcher(header_line);
if (matcher.matches()) {
sum_waiting_hdr_waiting1_cnt++;
} else {
System.err.println();
System.err.println("ERROR: header line does " +
"not match a waiting pattern.");
......@@ -251,7 +313,9 @@ public class TestThreadDumpMonitorContention {
}
matcher = THREAD_STATE_BLOCKED_PATTERN.matcher(thread_state_line);
if (!matcher.matches()) {
if (matcher.matches()) {
sum_waiting_thr_state_blocked_cnt++;
} else {
System.err.println();
System.err.println("ERROR: thread state line " +
"does not match a waiting pattern.");
......@@ -273,7 +337,10 @@ public class TestThreadDumpMonitorContention {
static void doSamples() throws Exception {
for (int count = 0; count < n_samples; count++) {
match_cnt = 0;
blank_line_match_cnt = 0;
header_prefix_match_cnt = 0;
locked_line_match_cnt = 0;
waiting_line_match_cnt = 0;
// verbose mode or an error has a lot of output so add more space
if (verbose || error_cnt > 0) System.out.println();
System.out.println("Sample #" + count);
......@@ -290,12 +357,12 @@ public class TestThreadDumpMonitorContention {
// a failure and we report it
// - for a stack trace that matches LOCKED_PATTERN, we verify:
// - the header line matches HEADER_RUNNABLE_PATTERN
// or HEADER_WAITING_PATTERN
// or HEADER_WAITING_PATTERN{1,2}
// - the thread state line matches THREAD_STATE_BLOCKED_PATTERN
// or THREAD_STATE_RUNNABLE_PATTERN
// - we report any mismatches as failures
// - for a stack trace that matches WAITING_PATTERN, we verify:
// - the header line matches HEADER_WAITING_PATTERN
// - the header line matches HEADER_WAITING_PATTERN1
// - the thread state line matches THREAD_STATE_BLOCKED_PATTERN
// - we report any mismatches as failures
// - the stack traces that match HEADER_PREFIX_PATTERN may
......@@ -324,6 +391,7 @@ public class TestThreadDumpMonitorContention {
if (!have_header_line) {
matcher = HEADER_PREFIX_PATTERN.matcher(line);
if (matcher.matches()) {
header_prefix_match_cnt++;
if (verbose) {
System.out.println();
System.out.println("header='" + line + "'");
......@@ -366,19 +434,80 @@ public class TestThreadDumpMonitorContention {
}
process.waitFor();
if (match_cnt == 2) {
if (match_list[0].equals(match_list[1])) {
if (header_prefix_match_cnt != 2) {
System.err.println();
System.err.println("ERROR: should match exactly two headers.");
System.err.println("ERROR: header_prefix_match_cnt=" +
header_prefix_match_cnt);
error_cnt++;
}
if (locked_line_match_cnt == 2) {
if (locked_match_list[0].equals(locked_match_list[1])) {
System.err.println();
System.err.println("ERROR: matching lock lines:");
System.err.println("ERROR: line[0]'" + match_list[0] + "'");
System.err.println("ERROR: line[1]'" + match_list[1] + "'");
System.err.println("ERROR: line[0]'" +
locked_match_list[0] + "'");
System.err.println("ERROR: line[1]'" +
locked_match_list[1] + "'");
error_cnt++;
}
}
if (locked_line_match_cnt == 1) {
// one thread has the lock
if (waiting_line_match_cnt == 1) {
// and the other contended for it
sum_contended_cnt++;
} else {
// and the other is just running
sum_uncontended_cnt++;
}
} else if (waiting_line_match_cnt == 1) {
// one thread is waiting
sum_one_waiting_cnt++;
} else if (waiting_line_match_cnt == 2) {
// both threads are waiting
sum_both_waiting_cnt++;
} else {
// both threads are running
sum_both_running_cnt++;
}
// slight delay between jstack launches
Thread.sleep(500);
}
if (error_cnt != 0) {
// skip summary info since there were errors
return;
}
System.out.println("INFO: Summary for all samples:");
System.out.println("INFO: both_running_cnt=" + sum_both_running_cnt);
System.out.println("INFO: both_waiting_cnt=" + sum_both_waiting_cnt);
System.out.println("INFO: contended_cnt=" + sum_contended_cnt);
System.out.println("INFO: one_waiting_cnt=" + sum_one_waiting_cnt);
System.out.println("INFO: uncontended_cnt=" + sum_uncontended_cnt);
System.out.println("INFO: locked_hdr_runnable_cnt=" +
sum_locked_hdr_runnable_cnt);
System.out.println("INFO: locked_hdr_waiting1_cnt=" +
sum_locked_hdr_waiting1_cnt);
System.out.println("INFO: locked_hdr_waiting2_cnt=" +
sum_locked_hdr_waiting2_cnt);
System.out.println("INFO: locked_thr_state_blocked_cnt=" +
sum_locked_thr_state_blocked_cnt);
System.out.println("INFO: locked_thr_state_runnable_cnt=" +
sum_locked_thr_state_runnable_cnt);
System.out.println("INFO: waiting_hdr_waiting1_cnt=" +
sum_waiting_hdr_waiting1_cnt);
System.out.println("INFO: waiting_thr_state_blocked_cnt=" +
sum_waiting_thr_state_blocked_cnt);
if (sum_contended_cnt == 0) {
System.err.println("WARNING: the primary scenario for 8036823" +
" has not been exercised by this test run.");
}
}
// This helper relies on RuntimeMXBean.getName() returning a string
......
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