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8315413: Remove special filtering of Continuation.yield0 in StackWalker

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Reviewed-by: alanb
This commit is contained in:
Mandy Chung 2023-08-31 16:11:03 +00:00
parent ea5aa61c8c
commit c8acab1d91
4 changed files with 9 additions and 33 deletions
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26
src/java.base/share/classes/java/lang/StackStreamFactory.java
View file

@ -543,12 +543,6 @@ final class StackStreamFactory {
final Class<?> at(int index) {
return stackFrames[index].declaringClass();
}
@Override
final boolean filter(int index) {
return stackFrames[index].declaringClass() == Continuation.class
&& "yield0".equals(stackFrames[index].getMethodName());
}
}
final Function<? super Stream<StackFrame>, ? extends T> function; // callback
@ -685,10 +679,6 @@ final class StackStreamFactory {
@Override
final Class<?> at(int index) { return classes[index];}
@Override
final boolean filter(int index) { return false; }
// ------ subclass may override the following methods -------
/**
* Resizes the buffers for VM to fill in the next batch of stack frames.
@ -820,12 +810,6 @@ final class StackStreamFactory {
final Class<?> at(int index) {
return stackFrames[index].declaringClass();
}
@Override
final boolean filter(int index) {
return stackFrames[index].declaringClass() == Continuation.class
&& "yield0".equals(stackFrames[index].getMethodName());
}
}
LiveStackInfoTraverser(StackWalker walker,
@ -895,13 +879,6 @@ final class StackStreamFactory {
*/
abstract Class<?> at(int index);
/**
* Filter out frames at the top of a batch
* @param index the position of the frame.
* @return true if the frame should be skipped
*/
abstract boolean filter(int index);
// ------ subclass may override the following methods -------
/*
@ -1007,8 +984,7 @@ final class StackStreamFactory {
this.fence = endIndex;
for (int i = START_POS; i < fence; i++) {
if (isDebug) System.err.format(" frame %d: %s%n", i, at(i));
if ((depth == 0 && filterStackWalkImpl(at(i))) // filter the frames due to the stack stream implementation
|| filter(i)) {
if (depth == 0 && filterStackWalkImpl(at(i))) { // filter the frames due to the stack stream implementation
origin++;
} else {
break;

2
test/jdk/jdk/internal/vm/Continuation/Basic.java
View file

@ -92,7 +92,7 @@ public class Basic {
assertEquals(cont.isPreempted(), false);
List<String> frames = cont.stackWalker().walk(fs -> fs.map(StackWalker.StackFrame::getMethodName).collect(Collectors.toList()));
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield", "bar", "foo", "lambda$test1$0", "run", "enter0", "enter"));
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield0", "yield", "bar", "foo", "lambda$test1$0", "run", "enter0", "enter"));
}
assertEquals(res.get(), 247);
assertEquals(cont.isPreempted(), false);

2
test/jdk/jdk/internal/vm/Continuation/BasicExt.java
View file

@ -798,7 +798,7 @@ public class BasicExt {
cont.stackWalker()
.walk(fs -> fs.map(StackWalker.StackFrame::getMethodName).collect(Collectors.toList()));
assertEquals(frames, cont.isDone() ? List.of()
: Arrays.asList("yield", "ord104_testMethod_dontinline",
: Arrays.asList("yield0", "yield", "ord104_testMethod_dontinline",
"ord103_testMethod_dontinline",
"ord102_testMethod_dontinline",
"ord101_testMethod_dontinline",

12
test/jdk/jdk/internal/vm/Continuation/Scoped.java
View file

@ -74,27 +74,27 @@ public class Scoped {
frames = cont.stackWalker().walk(fs -> fs.map(StackWalker.StackFrame::getMethodName).collect(Collectors.toList()));
System.out.println("No scope: " + frames);
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield", "lambda$bar$14", "run", "enter0", "enter", "run", "bar", "lambda$foo$8", "run", "enter0", "enter", "run", "foo", "lambda$test1$0", "run", "enter0", "enter"));
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield0", "yield", "lambda$bar$14", "run", "enter0", "enter", "run", "bar", "lambda$foo$8", "run", "enter0", "enter", "yield0", "run", "foo", "lambda$test1$0", "run", "enter0", "enter"));
frames = cont.stackWalker(EnumSet.noneOf(StackWalker.Option.class), A).walk(fs -> fs.map(StackWalker.StackFrame::getMethodName).collect(Collectors.toList()));
System.out.println("A: " + frames);
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield", "lambda$bar$14", "run", "enter0", "enter", "run", "bar", "lambda$foo$8", "run", "enter0", "enter", "run", "foo", "lambda$test1$0", "run", "enter0", "enter"));
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield0", "yield", "lambda$bar$14", "run", "enter0", "enter", "run", "bar", "lambda$foo$8", "run", "enter0", "enter", "yield0", "run", "foo", "lambda$test1$0", "run", "enter0", "enter"));
frames = cont.stackWalker(EnumSet.noneOf(StackWalker.Option.class), B).walk(fs -> fs.map(StackWalker.StackFrame::getMethodName).collect(Collectors.toList()));
System.out.println("B: " + frames);
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield", "lambda$bar$14", "run", "enter0", "enter", "run", "bar", "lambda$foo$8", "run", "enter0", "enter"));
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield0", "yield", "lambda$bar$14", "run", "enter0", "enter", "run", "bar", "lambda$foo$8", "run", "enter0", "enter"));
frames = cont.stackWalker(EnumSet.noneOf(StackWalker.Option.class), C).walk(fs -> fs.map(StackWalker.StackFrame::getMethodName).collect(Collectors.toList()));
System.out.println("C: " + frames);
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield", "lambda$bar$14", "run", "enter0", "enter"));
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield0", "yield", "lambda$bar$14", "run", "enter0", "enter"));
frames = cont.stackWalker(EnumSet.noneOf(StackWalker.Option.class), K).walk(fs -> fs.map(StackWalker.StackFrame::getMethodName).collect(Collectors.toList()));
System.out.println("K: " + frames);
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield", "lambda$bar$14", "run", "enter0", "enter", "run", "bar", "lambda$foo$8", "run", "enter0", "enter", "run", "foo", "lambda$test1$0", "run", "enter0", "enter"));
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield0", "yield", "lambda$bar$14", "run", "enter0", "enter", "run", "bar", "lambda$foo$8", "run", "enter0", "enter", "yield0", "run", "foo", "lambda$test1$0", "run", "enter0", "enter"));
frames = cont.stackWalker(EnumSet.noneOf(StackWalker.Option.class), null).walk(fs -> fs.map(StackWalker.StackFrame::getMethodName).collect(Collectors.toList()));
System.out.println("null: " + frames);
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield", "lambda$bar$14", "run", "enter0", "enter", "run", "bar", "lambda$foo$8", "run", "enter0", "enter", "run", "foo", "lambda$test1$0", "run", "enter0", "enter"));
assertEquals(frames, cont.isDone() ? List.of() : Arrays.asList("yield0", "yield", "lambda$bar$14", "run", "enter0", "enter", "run", "bar", "lambda$foo$8", "run", "enter0", "enter", "yield0", "run", "foo", "lambda$test1$0", "run", "enter0", "enter"));
}
assertEquals(res.get(), 2);
}