Open-source multiplayer game server compatible with the RuneScape client
https://www.openrs2.org/
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48 lines
1.6 KiB
48 lines
1.6 KiB
package dev.openrs2.deob.transform;
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import dev.openrs2.asm.InsnMatcher;
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import dev.openrs2.asm.InsnNodeUtils;
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import dev.openrs2.asm.classpath.ClassPath;
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import dev.openrs2.asm.classpath.Library;
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import dev.openrs2.asm.transform.Transformer;
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import org.objectweb.asm.tree.ClassNode;
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import org.objectweb.asm.tree.MethodNode;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public final class ExceptionTracingTransformer extends Transformer {
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private static final Logger logger = LoggerFactory.getLogger(ExceptionTracingTransformer.class);
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private static final InsnMatcher CATCH_MATCHER = InsnMatcher.compile("ASTORE ALOAD (| LDC INVOKESTATIC | NEW DUP (LDC INVOKESPECIAL | INVOKESPECIAL LDC INVOKEVIRTUAL) ((ILOAD | LLOAD | FLOAD | DLOAD | (ALOAD IFNULL LDC GOTO LDC) | BIPUSH) INVOKEVIRTUAL)* INVOKEVIRTUAL INVOKESTATIC) ATHROW");
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private int tracingTryCatches;
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@Override
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public void preTransform(ClassPath classPath) {
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tracingTryCatches = 0;
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}
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@Override
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public boolean transformCode(ClassPath classPath, Library library, ClassNode clazz, MethodNode method) {
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CATCH_MATCHER.match(method).forEach(match -> {
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var foundTryCatch = method.tryCatchBlocks.removeIf(tryCatch -> {
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if (!"java/lang/RuntimeException".equals(tryCatch.type)) {
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return false;
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}
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return InsnNodeUtils.nextReal(tryCatch.handler) == match.get(0);
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});
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if (foundTryCatch) {
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match.forEach(method.instructions::remove);
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tracingTryCatches++;
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}
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});
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return false;
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}
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@Override
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public void postTransform(ClassPath classPath) {
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logger.info("Removed {} tracing try/catch blocks", tracingTryCatches);
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}
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}
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