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8286671: (fc) Modify sun.nio.ch.FileChannelImpl.map0() to accept a FileDescriptor parameter

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Reviewed-by: alanb, jpai
This commit is contained in:
Brian Burkhalter 2022-05-13 17:46:52 +00:00
parent 1e843c3d4f
commit 583a61aabb
3 changed files with 13 additions and 21 deletions
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8
src/java.base/unix/native/libnio/ch/FileChannelImpl.c
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@ -50,13 +50,10 @@
#include "java_lang_Integer.h"
#include <assert.h>
static jfieldID chan_fd; /* jobject 'fd' in sun.nio.ch.FileChannelImpl */
JNIEXPORT jlong JNICALL
Java_sun_nio_ch_FileChannelImpl_initIDs(JNIEnv *env, jclass clazz)
Java_sun_nio_ch_FileChannelImpl_allocationGranularity0(JNIEnv *env, jclass clazz)
{
jlong pageSize = sysconf(_SC_PAGESIZE);
chan_fd = (*env)->GetFieldID(env, clazz, "fd", "Ljava/io/FileDescriptor;");
return pageSize;
}
@ -73,11 +70,10 @@ handle(JNIEnv *env, jlong rv, char *msg)
JNIEXPORT jlong JNICALL
Java_sun_nio_ch_FileChannelImpl_map0(JNIEnv *env, jobject this,
Java_sun_nio_ch_FileChannelImpl_map0(JNIEnv *env, jobject this, jobject fdo,
jint prot, jlong off, jlong len, jboolean map_sync)
{
void *mapAddress = 0;
jobject fdo = (*env)->GetObjectField(env, this, chan_fd);
jint fd = fdval(env, fdo);
int protections = 0;
int flags = 0;