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8312522: Implementation of Foreign Function & Memory API

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Co-authored-by: Maurizio Cimadamore <mcimadamore@openjdk.org>
Co-authored-by: Jorn Vernee <jvernee@openjdk.org>
Co-authored-by: Per Minborg <pminborg@openjdk.org>
Reviewed-by: dholmes, psandoz, mcimadamore, alanb
This commit is contained in:
Jorn Vernee 2023-10-12 19:50:08 +00:00
parent 9728e21db1
commit 32ac72c3d3
261 changed files with 3141 additions and 2126 deletions
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44
src/java.base/share/classes/java/lang/foreign/snippet-files/Snippets.java
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@ -122,7 +122,7 @@ class Snippets {
// @start region="slicing-arena-main":
try (Arena slicingArena = new SlicingArena(1000)) {
for (int i = 0; i < 10; i++) {
MemorySegment s = slicingArena.allocateArray(JAVA_INT, 1, 2, 3, 4, 5);
MemorySegment s = slicingArena.allocateFrom(JAVA_INT, 1, 2, 3, 4, 5);
// ...
}
} // all memory allocated is released here
@ -148,7 +148,7 @@ class Snippets {
void withTargetLayout() {
AddressLayout addressLayout = ADDRESS;
AddressLayout unboundedLayout = addressLayout.withTargetLayout(
sequenceLayout(ValueLayout.JAVA_BYTE));
sequenceLayout(Long.MAX_VALUE, ValueLayout.JAVA_BYTE));
}
}
@ -168,7 +168,7 @@ class Snippets {
);
try (Arena arena = Arena.ofConfined()) {
MemorySegment str = arena.allocateUtf8String("Hello");
MemorySegment str = arena.allocateFrom("Hello");
long len = (long) strlen.invokeExact(str); // 5
}
@ -197,7 +197,7 @@ class Snippets {
try (Arena arena = Arena.ofConfined()) {
MemorySegment compareFunc = linker.upcallStub(comparHandle, comparDesc, arena);
MemorySegment array = arena.allocateArray(JAVA_INT, 0, 9, 3, 4, 6, 5, 1, 8, 2, 7);
MemorySegment array = arena.allocateFrom(JAVA_INT, 0, 9, 3, 4, 6, 5, 1, 8, 2, 7);
qsort.invokeExact(array, 10L, 4L, compareFunc);
int[] sorted = array.toArray(JAVA_INT); // [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]
@ -288,7 +288,7 @@ class Snippets {
);
try (Arena arena = Arena.ofConfined()) {
int res = (int) printf.invokeExact(arena.allocateUtf8String("%d plus %d equals %d"), 2, 2, 4); //prints "2 plus 2 equals 4"
int res = (int) printf.invokeExact(arena.allocateFrom("%d plus %d equals %d"), 2, 2, 4); //prints "2 plus 2 equals 4"
}
}
@ -313,7 +313,7 @@ class Snippets {
try (Arena arena = Arena.ofConfined()) {
MemorySegment capturedState = arena.allocate(capturedStateLayout);
handle.invoke(capturedState);
int errno = (int) errnoHandle.get(capturedState);
int errno = (int) errnoHandle.get(capturedState, 0L);
// use errno
}
}
@ -351,8 +351,8 @@ class Snippets {
MethodHandle offsetHandle = taggedValues.byteOffsetHandle(PathElement.sequenceElement(),
PathElement.groupElement("kind"));
long offset1 = (long) offsetHandle.invokeExact(1L); // 8
long offset2 = (long) offsetHandle.invokeExact(2L); // 16
long offset1 = (long) offsetHandle.invokeExact(0L, 1L); // 8
long offset2 = (long) offsetHandle.invokeExact(0L, 2L); // 16
}
void sliceHandle() {
@ -396,7 +396,7 @@ class Snippets {
{
MemorySegment segment = null; // ...
VarHandle intHandle = MethodHandles.memorySegmentViewVarHandle(ValueLayout.JAVA_INT);
VarHandle intHandle = ValueLayout.JAVA_INT.varHandle();
MethodHandle multiplyExact = MethodHandles.lookup()
.findStatic(Math.class, "multiplyExact",
MethodType.methodType(long.class, long.class, long.class));
@ -408,8 +408,13 @@ class Snippets {
{
MemorySegment segment = null; // ...
VarHandle intHandle = ValueLayout.JAVA_INT.arrayElementVarHandle();
int value = (int) intHandle.get(segment, 3L); // get int element at offset 3 * 4 = 12
MemoryLayout segmentLayout = MemoryLayout.structLayout(
ValueLayout.JAVA_INT.withName("size"),
MemoryLayout.sequenceLayout(4, ValueLayout.JAVA_INT).withName("data") // array of 4 elements
);
VarHandle intHandle = segmentLayout.varHandle(MemoryLayout.PathElement.groupElement("data"),
MemoryLayout.PathElement.sequenceElement());
int value = (int) intHandle.get(segment, 0L, 3L); // get int element at offset 0 + offsetof(data) + 3 * 4 = 12
}
{
@ -524,10 +529,8 @@ class Snippets {
MemorySegment segment = null;
byte value = 42;
var byteHandle = MemoryLayout.sequenceLayout(ValueLayout.JAVA_BYTE)
.varHandle(MemoryLayout.PathElement.sequenceElement());
for (long l = 0; l < segment.byteSize(); l++) {
byteHandle.set(segment.address(), l, value);
segment.set(JAVA_BYTE, l, value);
}
}
@ -570,7 +573,7 @@ class Snippets {
);
try (Arena arena = Arena.ofConfined()) {
MemorySegment cString = arena.allocateUtf8String("Hello");
MemorySegment cString = arena.allocateFrom("Hello");
long len = (long) strlen.invokeExact(cString); // 5
}
@ -654,17 +657,6 @@ class Snippets {
static class ValueLayoutSnippets {
void arrayElementVarHandle() {
VarHandle arrayHandle = ValueLayout.JAVA_INT.arrayElementVarHandle(10, 20);
SequenceLayout arrayLayout = MemoryLayout.sequenceLayout(
MemoryLayout.sequenceLayout(10,
MemoryLayout.sequenceLayout(20, ValueLayout.JAVA_INT)));
int value1 = (int) arrayHandle.get(10, 2, 4); // ok, accessed offset = 8176
int value2 = (int) arrayHandle.get(0, 0, 30); // out of bounds value for z
}
void statics() {
ADDRESS.withByteAlignment(1);
JAVA_CHAR.withByteAlignment(1);