Example usage for org.objectweb.asm MethodVisitor visitLocalVariable

Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitLocalVariable.

Prototype

public void visitLocalVariable(final String name, final String descriptor, final String signature,
        final Label start, final Label end, final int index) 

Source Link

Document

Visits a local variable declaration.

Usage

From source file:org.spongepowered.test.decompile.OperatorTests.java

License:Open Source License

@Test
public void testShl() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(III)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);//from   w  ww .  ja v  a 2  s .c o  m
    Label end = new Label();
    mv.visitIntInsn(ILOAD, 1);
    mv.visitIntInsn(ILOAD, 2);
    mv.visitInsn(ISHL);
    mv.visitIntInsn(ISTORE, 0);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("i", "I", null, start, end, 0);
    mv.visitLocalVariable("a", "I", null, start, end, 1);
    mv.visitLocalVariable("b", "I", null, start, end, 2);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "i = a << b;";
    Assert.assertEquals(good, insn);
}

---

From source file:org.spongepowered.test.decompile.OperatorTests.java

License:Open Source License

@Test
public void testFloatCompare() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZFF)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);/*ww  w. ja  v a 2s. co m*/
    Label end = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitIntInsn(FLOAD, 1);
    mv.visitIntInsn(FLOAD, 2);
    mv.visitInsn(FCMPG);
    mv.visitJumpInsn(IFGT, l1);
    mv.visitInsn(ICONST_1);
    mv.visitJumpInsn(GOTO, l2);
    mv.visitLabel(l1);
    mv.visitInsn(ICONST_0);
    mv.visitLabel(l2);
    mv.visitIntInsn(ISTORE, 0);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("i", "Z", null, start, end, 0);
    mv.visitLocalVariable("a", "F", null, start, end, 1);
    mv.visitLocalVariable("b", "F", null, start, end, 2);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "i = a <= b;";
    Assert.assertEquals(good, insn);
}

---

From source file:org.spongepowered.test.decompile.TernaryTests.java

License:Open Source License

@Test
public void testSimple() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZI)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);/*from www.  j ava2 s  .c o m*/
    Label end = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitIntInsn(ILOAD, 0);
    mv.visitJumpInsn(IFEQ, l1);
    mv.visitIntInsn(BIPUSH, 6);
    mv.visitJumpInsn(GOTO, l2);
    mv.visitLabel(l1);
    mv.visitInsn(ICONST_3);
    mv.visitLabel(l2);
    mv.visitIntInsn(ISTORE, 1);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "Z", null, start, end, 0);
    mv.visitLocalVariable("i", "I", null, start, end, 1);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "i = a ? 6 : 3;";
    Assert.assertEquals(good, insn);
}

---

From source file:org.spongepowered.test.decompile.TernaryTests.java

License:Open Source License

@Test
public void testToField() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZI)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);/*from   w w w  .j  a  va2s  .  co  m*/
    Label end = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitIntInsn(ILOAD, 0);
    mv.visitJumpInsn(IFEQ, l1);
    mv.visitIntInsn(BIPUSH, 6);
    mv.visitJumpInsn(GOTO, l2);
    mv.visitLabel(l1);
    mv.visitInsn(ICONST_3);
    mv.visitLabel(l2);
    mv.visitFieldInsn(PUTSTATIC, THIS_TYPE.getInternalName(), "afield", "I");
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "Z", null, start, end, 0);
    mv.visitLocalVariable("i", "I", null, start, end, 1);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "org.spongepowered.test.decompile.TernaryTests.afield = a ? 6 : 3;";
    Assert.assertEquals(good, insn);
}

---

From source file:org.spongepowered.test.decompile.TernaryTests.java

License:Open Source License

@Test
public void testNested() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZIZ)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);//from   www  .jav a 2  s . c  om
    Label end = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    Label l3 = new Label();
    mv.visitIntInsn(ILOAD, 0);
    mv.visitJumpInsn(IFEQ, l1);
    mv.visitIntInsn(ILOAD, 2);
    mv.visitJumpInsn(IFEQ, l3);
    mv.visitInsn(ICONST_4);
    mv.visitJumpInsn(GOTO, l2);
    mv.visitLabel(l3);
    mv.visitInsn(ICONST_5);
    mv.visitJumpInsn(GOTO, l2);
    mv.visitLabel(l1);
    mv.visitInsn(ICONST_3);
    mv.visitLabel(l2);
    mv.visitIntInsn(ISTORE, 1);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "Z", null, start, end, 0);
    mv.visitLocalVariable("i", "I", null, start, end, 1);
    mv.visitLocalVariable("b", "Z", null, start, end, 2);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "i = a ? b ? 4 : 5 : 3;";
    Assert.assertEquals(good, insn);
}

---

From source file:org.spongepowered.test.decompile.TernaryTests.java

License:Open Source License

@Test
public void testNested2() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZIZ)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);//from w w w .  jav  a 2s  .co m
    Label end = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    Label l3 = new Label();
    mv.visitIntInsn(ILOAD, 0);
    mv.visitJumpInsn(IFEQ, l1);
    mv.visitInsn(ICONST_3);
    mv.visitJumpInsn(GOTO, l2);
    mv.visitLabel(l1);
    mv.visitIntInsn(ILOAD, 2);
    mv.visitJumpInsn(IFEQ, l3);
    mv.visitInsn(ICONST_4);
    mv.visitJumpInsn(GOTO, l2);
    mv.visitLabel(l3);
    mv.visitInsn(ICONST_5);
    mv.visitLabel(l2);
    mv.visitIntInsn(ISTORE, 1);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "Z", null, start, end, 0);
    mv.visitLocalVariable("i", "I", null, start, end, 1);
    mv.visitLocalVariable("b", "Z", null, start, end, 2);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "i = a ? 3 : b ? 4 : 5;";
    Assert.assertEquals(good, insn);
}

---

From source file:org.spongepowered.test.decompile.TernaryTests.java

License:Open Source License

@Test
public void testReturned() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZI)I");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);/*w  w w .j ava  2  s. c  om*/
    Label end = new Label();
    Label l1 = new Label();
    mv.visitIntInsn(ILOAD, 0);
    mv.visitJumpInsn(IFEQ, l1);
    mv.visitIntInsn(BIPUSH, 6);
    mv.visitJumpInsn(GOTO, end);
    mv.visitLabel(l1);
    mv.visitInsn(ICONST_3);
    mv.visitLabel(end);
    mv.visitInsn(IRETURN);
    mv.visitLocalVariable("a", "Z", null, start, end, 0);
    mv.visitLocalVariable("i", "I", null, start, end, 1);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "return a ? 6 : 3;";
    Assert.assertEquals(good, insn);
}

---

From source file:org.spongepowered.test.decompile.TryCatchTests.java

License:Open Source License

@Test
public void testTryCatch() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "()V");
    MethodVisitor mv = builder.getGenerator();
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    Label l4 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/NullPointerException");
    mv.visitLabel(l0);/*from ww w. j  a  va  2 s.  c o m*/
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitLabel(l1);
    mv.visitJumpInsn(GOTO, l4);
    mv.visitLabel(l2);
    mv.visitVarInsn(ASTORE, 2);
    mv.visitVarInsn(ALOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/NullPointerException", "printStackTrace", "()V", false);
    mv.visitLabel(l4);
    mv.visitInsn(RETURN);
    Label l5 = new Label();
    mv.visitLabel(l5);
    mv.visitLocalVariable("e", "Ljava/lang/NullPointerException;", null, l2, l5, 2);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "try {\n" + "    org.spongepowered.test.decompile.TryCatchTests.body();\n"
            + "} catch (NullPointerException e) {\n" + "    e.printStackTrace();\n" + "}";
    Assert.assertEquals(good, insn);
}

---

From source file:org.spongepowered.test.decompile.TryCatchTests.java

License:Open Source License

@Test
public void testTryMultiCatch() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "()V");
    MethodVisitor mv = builder.getGenerator();
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    Label l3 = new Label();
    Label l4 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/NullPointerException");
    mv.visitTryCatchBlock(l0, l1, l3, "java/lang/OutOfMemoryError");
    mv.visitLabel(l0);//from w  w  w.j  av  a  2s  .c o  m
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitLabel(l1);
    mv.visitJumpInsn(GOTO, l4);
    mv.visitLabel(l2);
    mv.visitVarInsn(ASTORE, 2);
    mv.visitVarInsn(ALOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/NullPointerException", "printStackTrace", "()V", false);
    mv.visitJumpInsn(GOTO, l4);
    mv.visitLabel(l3);
    mv.visitVarInsn(ASTORE, 2);
    mv.visitVarInsn(ALOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/OutOfMemoryError", "printStackTrace", "()V", false);
    mv.visitLabel(l4);
    mv.visitInsn(RETURN);
    Label l5 = new Label();
    mv.visitLabel(l5);
    mv.visitLocalVariable("e", "Ljava/lang/NullPointerException;", null, l2, l3, 2);
    mv.visitLocalVariable("e", "Ljava/lang/OutOfMemoryError;", null, l3, l4, 2);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "try {\n" + "    org.spongepowered.test.decompile.TryCatchTests.body();\n"
            + "} catch (NullPointerException e) {\n" + "    e.printStackTrace();\n"
            + "} catch (OutOfMemoryError e) {\n" + "    e.printStackTrace();\n" + "}";
    Assert.assertEquals(good, insn);
}

---

From source file:org.spongepowered.test.decompile.TryCatchTests.java

License:Open Source License

@Test
public void testTryPipeCatch() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "()V");
    MethodVisitor mv = builder.getGenerator();
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    Label l4 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/NullPointerException");
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/OutOfMemoryError");
    mv.visitLabel(l0);/*  ww  w .  j a  v  a 2  s.co m*/
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitLabel(l1);
    mv.visitJumpInsn(GOTO, l4);
    mv.visitLabel(l2);
    mv.visitVarInsn(ASTORE, 2);
    mv.visitVarInsn(ALOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/NullPointerException", "printStackTrace", "()V", false);
    mv.visitLabel(l4);
    mv.visitInsn(RETURN);
    Label l5 = new Label();
    mv.visitLabel(l5);
    mv.visitLocalVariable("e", "Ljava/lang/NullPointerException;", null, l2, l4, 2);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "try {\n" + "    org.spongepowered.test.decompile.TryCatchTests.body();\n"
            + "} catch (NullPointerException | OutOfMemoryError e) {\n" + "    e.printStackTrace();\n" + "}";
    Assert.assertEquals(good, insn);
}

---

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