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update Unsafe.setMemory to reflect new OpenJDK 7 signature and semantics

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This commit is contained in:
Joel Dice 2012-03-14 11:54:03 -06:00
parent f8934b2c9d
commit c4722fa843
2 changed files with 18 additions and 6 deletions
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3
classpath/sun/misc/Unsafe.java
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@ -11,7 +11,8 @@ public final class Unsafe {
public native long allocateMemory(long bytes);
public native void setMemory(long address, long count, byte value);
public native void setMemory
(Object base, long offset, long count, byte value);
public native void freeMemory(long address);

21
src/builtin.cpp
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@ -352,13 +352,24 @@ Avian_sun_misc_Unsafe_freeMemory
extern "C" JNIEXPORT void JNICALL
Avian_sun_misc_Unsafe_setMemory
(Thread*, object, uintptr_t* arguments)
(Thread* t, object, uintptr_t* arguments)
{
int64_t p; memcpy(&p, arguments + 1, 8);
int64_t count; memcpy(&count, arguments + 3, 8);
int8_t v = arguments[5];
object base = reinterpret_cast<object>(arguments[1]);
int64_t offset; memcpy(&offset, arguments + 2, 8);
int64_t count; memcpy(&count, arguments + 4, 8);
int8_t value = arguments[6];
memset(reinterpret_cast<int8_t*>(p), v, count);
fprintf(stderr, "base %p offset %p count %ld value %d\n", base, reinterpret_cast<int8_t*>(offset), count, value);
PROTECT(t, base);
ACQUIRE(t, t->m->referenceLock);
if (base) {
memset(&cast<int8_t>(base, offset), value, count);
} else {
memset(reinterpret_cast<int8_t*>(offset), value, count);
}
}
// NB: The following primitive get/put methods are only used by the