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First attempt at manual computation of stack frames

This commit is contained in:
riven-lwjgl 2011-07-12 18:30:56 +00:00
parent 950b17a8fe
commit 1e108964cd
1 changed files with 38 additions and 4 deletions
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42
src/java/org/lwjgl/util/mapped/MappedObjectTransformer.java
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@ -138,7 +138,7 @@ public class MappedObjectTransformer {
private static final String view_constructor_method = "_construct_view_";
static byte[] transformFieldAccess(final String className, byte[] bytecode) {
int flags = ClassWriter.COMPUTE_FRAMES;
int flags = 0;//ClassWriter.COMPUTE_FRAMES;
ClassWriter writer = new ClassWriter(flags);
@ -224,6 +224,14 @@ public class MappedObjectTransformer {
super.visitTypeInsn(opcode, typeName);
}
private int requireExtraStack = 0;
@Override
public void visitMaxs(int maxStack, int maxLocals)
{
super.visitMaxs(maxStack+this.requireExtraStack, maxLocals);
}
@Override
public void visitMethodInsn(int opcode, String className, String methodName, String signature) {
@ -241,7 +249,7 @@ public class MappedObjectTransformer {
if ( (isMapDirectMethod || isMapBufferMethod) || isMallocMethod ) {
if ( isMallocMethod ) {
// stack: count
// stack: count
pushInt(super.mv, mappedType.sizeof);
// stack: sizeof, count
super.visitInsn(IMUL);
@ -271,6 +279,7 @@ public class MappedObjectTransformer {
// stack: int, int, buffer, new, new
super.visitMethodInsn(INVOKESTATIC, jvmClassName(MappedHelper.class), "setup", "(L" + jvmClassName(MappedObject.class) + ";Ljava/nio/ByteBuffer;II)V");
// stack: new
this.requireExtraStack = 5;
return;
}
@ -284,6 +293,7 @@ public class MappedObjectTransformer {
// stack: new, this
super.visitMethodInsn(INVOKESTATIC, jvmClassName(MappedHelper.class), "dup", "(L" + jvmClassName(MappedObject.class) + ";L" + jvmClassName(MappedObject.class) + ";)L" + jvmClassName(MappedObject.class) + ";");
// stack: new
this.requireExtraStack = 3;
return;
}
@ -297,6 +307,7 @@ public class MappedObjectTransformer {
// stack: new, this
super.visitMethodInsn(INVOKESTATIC, jvmClassName(MappedHelper.class), "slice", "(L" + jvmClassName(MappedObject.class) + ";L" + jvmClassName(MappedObject.class) + ";)L" + jvmClassName(MappedObject.class) + ";");
// stack: new
this.requireExtraStack = 3;
return;
}
@ -308,6 +319,7 @@ public class MappedObjectTransformer {
// stack: this, this
super.visitMethodInsn(INVOKEVIRTUAL, className, view_constructor_method, "()V");
// stack: this
this.requireExtraStack = 2;
return;
}
@ -319,6 +331,7 @@ public class MappedObjectTransformer {
// stack: sizeof, target, this
super.visitMethodInsn(INVOKESTATIC, jvmClassName(MappedHelper.class), "copy", "(L" + jvmClassName(MappedObject.class) + ";L" + jvmClassName(MappedObject.class) + ";I)V");
// stack: -
this.requireExtraStack = 3;
return;
}
@ -330,6 +343,7 @@ public class MappedObjectTransformer {
// stack: bytes, target, this
super.visitMethodInsn(INVOKESTATIC, jvmClassName(MappedHelper.class), "copy", "(L" + jvmClassName(MappedObject.class) + ";L" + jvmClassName(MappedObject.class) + ";I)V");
// stack: -
this.requireExtraStack = 4;
return;
}
}
@ -458,30 +472,50 @@ public class MappedObjectTransformer {
if ( opcode == GETFIELD ) {
Long fieldLength = mappedSubtype.fieldToLength.get(fieldName);
// stack: ref
super.visitFieldInsn(GETFIELD, mappedSubtype.className, "viewAddress", "J");
// stack: long
super.visitLdcInsn(fieldOffset);
// stack: long, long
super.visitInsn(LADD);
// stack: long
super.visitLdcInsn(fieldLength);
// stack: long, long
super.visitInsn(L2I);
// stack: int, long
super.visitMethodInsn(INVOKESTATIC, jvmClassName(MappedHelper.class), "newBuffer", "(JI)L" + jvmClassName(ByteBuffer.class) + ";");
// stack: buffer
this.requireExtraStack = 4;
return;
}
}
if ( opcode == PUTFIELD ) {
// stack: value, ref
super.visitInsn(SWAP);
// stack: ref, value
super.visitFieldInsn(GETFIELD, mappedSubtype.className, "viewAddress", "J");
// stack: long, value
super.visitLdcInsn(fieldOffset);
// stack: long, long, value
super.visitInsn(LADD);
// stack: long, value
super.visitMethodInsn(INVOKESTATIC, jvmClassName(MappedHelper.class), typeName.toLowerCase() + "put", "(" + typeName + "J)V");
// stack -
this.requireExtraStack = 4+(int)(mappedSubtype.fieldToLength.get(fieldName).longValue()>>2);
return;
}
if ( opcode == GETFIELD ) {
// stack: ref
super.visitFieldInsn(GETFIELD, mappedSubtype.className, "viewAddress", "J");
// stack: long
super.visitLdcInsn(fieldOffset);
// stack: long, long
super.visitInsn(LADD);
// stack: long
super.visitMethodInsn(INVOKESTATIC, jvmClassName(MappedHelper.class), typeName.toLowerCase() + "get", "(J)" + typeName);
// stack: value
this.requireExtraStack = 4;
return;
}
@ -511,7 +545,7 @@ public class MappedObjectTransformer {
else if ( value >= Short.MIN_VALUE && value <= Short.MAX_VALUE )
mv.visitIntInsn(SIPUSH, value);
else
mv.visitLdcInsn(value);
mv.visitLdcInsn(Integer.valueOf(value));
}
private static String jvmClassName(Class<?> type) {