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8254693: Add Panama feature to pass heap segments to native code

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Reviewed-by: mcimadamore, lucy, vlivanov
This commit is contained in:
Jorn Vernee 2023-11-14 11:19:30 +00:00
parent c80e691adf
commit 9c98270737
73 changed files with 1990 additions and 960 deletions
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33
src/java.base/share/native/libfallbackLinker/fallbackLinker.c
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@ -28,6 +28,7 @@
#include <ffi.h>
#include <errno.h>
#include <malloc.h>
#include <stdint.h>
#include <wchar.h>
#ifdef _WIN64
@ -109,9 +110,39 @@ static void do_capture_state(int32_t* value_ptr, int captured_state_mask) {
}
JNIEXPORT void JNICALL
Java_jdk_internal_foreign_abi_fallback_LibFallback_doDowncall(JNIEnv* env, jclass cls, jlong cif, jlong fn, jlong rvalue, jlong avalues, jlong jcaptured_state, jint captured_state_mask) {
Java_jdk_internal_foreign_abi_fallback_LibFallback_doDowncall(JNIEnv* env, jclass cls, jlong cif, jlong fn, jlong rvalue,
jlong avalues, jlong jcaptured_state, jint captured_state_mask,
jarray heapBases, jint numArgs) {
void** carrays;
if (heapBases != NULL) {
void** aptrs = jlong_to_ptr(avalues);
carrays = malloc(sizeof(void*) * numArgs);
for (int i = 0; i < numArgs; i++) {
jarray hb = (jarray) (*env)->GetObjectArrayElement(env, heapBases, i);
if (hb != NULL) {
// *(aptrs[i]) is the offset into the segment (from MS::address)
// we add the base address of the array to it here
jboolean isCopy;
jbyte* arrayPtr = (*env)->GetPrimitiveArrayCritical(env, hb, &isCopy);
carrays[i] = arrayPtr;
int offset = *((int*)aptrs[i]);
*((void**)aptrs[i]) = arrayPtr + offset;
}
}
}
ffi_call(jlong_to_ptr(cif), jlong_to_ptr(fn), jlong_to_ptr(rvalue), jlong_to_ptr(avalues));
if (heapBases != NULL) {
for (int i = 0; i < numArgs; i++) {
jarray hb = (jarray) (*env)->GetObjectArrayElement(env, heapBases, i);
if (hb != NULL) {
(*env)->ReleasePrimitiveArrayCritical(env, hb, carrays[i], JNI_COMMIT);
}
}
free(carrays);
}
if (captured_state_mask != 0) {
int32_t* captured_state = jlong_to_ptr(jcaptured_state);
do_capture_state(captured_state, captured_state_mask);