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.DoWhileTests.java

License:Open Source License

@Test
public void testDoWhile() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(I)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);//from  w w w . j  a v  a2s .co  m
    Label end = new Label();
    Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitVarInsn(ILOAD, 0);
    mv.visitInsn(ICONST_5);
    mv.visitJumpInsn(IF_ICMPLT, l1);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("i", "I", null, start, end, 0);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "do {\n" + "    org.spongepowered.test.decompile.DoWhileTests.body();\n" + "} while (i < 5);";
    Assert.assertEquals(good, insn);
}

---

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

License:Open Source License

@Test
public void testDoWhileAnd() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZZ)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);/*from  w ww.j a va  2s  .com*/
    Label end = new Label();
    Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitVarInsn(ILOAD, 0);
    mv.visitJumpInsn(IFEQ, end);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitJumpInsn(IFNE, l1);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "Z", null, start, end, 0);
    mv.visitLocalVariable("b", "Z", null, start, end, 1);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "do {\n" + "    org.spongepowered.test.decompile.DoWhileTests.body();\n"
            + "} while (a && b);";
    Assert.assertEquals(good, insn);
}

---

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

License:Open Source License

@Test
public void testDoWhileOr() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZZ)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);//from w ww  .j a v  a 2  s .  c om
    Label end = new Label();
    Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitVarInsn(ILOAD, 0);
    mv.visitJumpInsn(IFNE, l1);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitJumpInsn(IFNE, l1);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "Z", null, start, end, 0);
    mv.visitLocalVariable("b", "Z", null, start, end, 1);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "do {\n" + "    org.spongepowered.test.decompile.DoWhileTests.body();\n"
            + "} while (a || b);";
    Assert.assertEquals(good, insn);
}

---

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

License:Open Source License

@Test
public void testDoWhileBreak() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(IZ)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);//  ww w . jav  a 2s.  co  m
    Label end = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitLabel(l1);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitJumpInsn(IFEQ, l2);
    mv.visitJumpInsn(GOTO, end);
    mv.visitLabel(l2);
    mv.visitVarInsn(ILOAD, 0);
    mv.visitInsn(ICONST_5);
    mv.visitJumpInsn(IF_ICMPLT, l1);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("i", "I", null, start, end, 0);
    mv.visitLocalVariable("a", "Z", null, start, end, 1);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "do {\n" + "    org.spongepowered.test.decompile.DoWhileTests.body();\n" + "    if (a) {\n"
            + "        break;\n" + "    }\n" + "} while (i < 5);";
    Assert.assertEquals(good, insn);
}

---

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

License:Open Source License

public void testDoWhileContinue() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(IZ)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);//  w ww.  j a  va 2s. c o m
    Label end = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitLabel(l1);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitJumpInsn(IFEQ, l2);
    mv.visitJumpInsn(GOTO, l1);
    mv.visitLabel(l2);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitVarInsn(ILOAD, 0);
    mv.visitInsn(ICONST_5);
    mv.visitJumpInsn(IF_ICMPLT, l1);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("i", "I", null, start, end, 0);
    mv.visitLocalVariable("a", "Z", null, start, end, 1);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "do {\n" + "    DoWhileTests.body();\n" + "    if (a) {\n" + "        continue;\n" + "    }\n"
            + "    DoWhileTests.body();\n" + "} while (i < 5);";
    Assert.assertEquals(good, insn);
}

---

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

License:Open Source License

@Test
public void testSimple() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(Z)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);/*from w  w  w .  j av  a 2 s .c  om*/
    Label end = new Label();
    mv.visitVarInsn(ILOAD, 0);
    mv.visitJumpInsn(IFEQ, end);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitLabel(end);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "Z", null, start, end, 0);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "if (a) {\n" + "    org.spongepowered.test.decompile.IfTests.body();\n" + "}";
    Assert.assertEquals(good, insn);
}

---

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

License:Open Source License

@Test
public void testComparisonAndNull() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ILjava/lang/Object;)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);/*from w  w w.  ja  v  a 2s . c om*/
    Label ret = new Label();
    Label body = new Label();
    mv.visitVarInsn(ILOAD, 0);
    mv.visitInsn(ICONST_3);
    mv.visitJumpInsn(IF_ICMPLT, body);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitJumpInsn(IFNULL, ret);
    mv.visitLabel(body);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitLabel(ret);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "I", null, start, ret, 0);
    mv.visitLocalVariable("b", "Ljava/lang/Object;", null, start, ret, 1);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "if (a < 3 || b != null) {\n" + "    org.spongepowered.test.decompile.IfTests.body();\n"
            + "}";
    Assert.assertEquals(good, insn);
}

---

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

License:Open Source License

@Test
public void testOr() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZZ)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);//from  w w w  .jav  a2  s. c  o m
    Label ret = new Label();
    Label body = new Label();
    mv.visitVarInsn(ILOAD, 0);
    mv.visitJumpInsn(IFNE, body);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitJumpInsn(IFEQ, ret);
    mv.visitLabel(body);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitLabel(ret);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "Z", null, start, ret, 0);
    mv.visitLocalVariable("b", "Z", null, start, ret, 1);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "if (a || b) {\n" + "    org.spongepowered.test.decompile.IfTests.body();\n" + "}";
    Assert.assertEquals(good, insn);
}

---

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

License:Open Source License

@Test
public void testAnd() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZZ)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);/*ww w . j a va 2  s. c  om*/
    Label ret = new Label();
    Label body = new Label();
    mv.visitVarInsn(ILOAD, 0);
    mv.visitJumpInsn(IFEQ, ret);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitJumpInsn(IFEQ, ret);
    mv.visitLabel(body);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitLabel(ret);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "Z", null, start, ret, 0);
    mv.visitLocalVariable("b", "Z", null, start, ret, 1);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "if (a && b) {\n" + "    org.spongepowered.test.decompile.IfTests.body();\n" + "}";
    Assert.assertEquals(good, insn);
}

---

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

License:Open Source License

@Test
public void testMultipleAnd() {
    TestMethodBuilder builder = new TestMethodBuilder("test_mth", "(ZZZ)V");
    MethodVisitor mv = builder.getGenerator();
    Label start = new Label();
    mv.visitLabel(start);//  w ww .j  a va2 s .  c  o  m
    Label ret = new Label();
    Label body = new Label();
    mv.visitVarInsn(ILOAD, 0);
    mv.visitJumpInsn(IFEQ, ret);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitJumpInsn(IFEQ, ret);
    mv.visitVarInsn(ILOAD, 2);
    mv.visitJumpInsn(IFEQ, ret);
    mv.visitLabel(body);
    mv.visitMethodInsn(INVOKESTATIC, THIS_TYPE.getInternalName(), "body", "()V", false);
    mv.visitLabel(ret);
    mv.visitInsn(RETURN);
    mv.visitLocalVariable("a", "Z", null, start, ret, 0);
    mv.visitLocalVariable("b", "Z", null, start, ret, 1);
    mv.visitLocalVariable("c", "Z", null, start, ret, 2);

    String insn = TestHelper.getAsString(builder.finish(), "test_mth");
    String good = "if (a && b && c) {\n" + "    org.spongepowered.test.decompile.IfTests.body();\n" + "}";
    Assert.assertEquals(good, insn);
}

---

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