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Expand where stacktraces can be deobfuscated (#5944)

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Also load the mappings from the correct location
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Jason 2021-06-21 21:12:07 -07:00 committed by GitHub
parent 40e27befc2
commit ae95311131
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1 changed files with 123 additions and 37 deletions
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160
patches/server/0717-Deobfuscate-stacktraces-in-log-messages-using-a-Rewr.patch → patches/server/0717-Deobfuscate-stacktraces-in-log-messages-crash-report.patch
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@ -1,8 +1,8 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Sun, 20 Jun 2021 18:19:09 -0700
Subject: [PATCH] Deobfuscate stacktraces in log messages using a
RewriteAppender and a custom RewritePolicy
Subject: [PATCH] Deobfuscate stacktraces in log messages, crash reports, and
etc.
diff --git a/build.gradle.kts b/build.gradle.kts
@ -109,12 +109,49 @@ index 7acf077bc131af718c7548cc29deef558c04e463..73652e403eaa419fb5b4b54bd506f246
public static int itemValidationLoreLineLength = 8192;
diff --git a/src/main/java/io/papermc/paper/logging/StacktraceDeobfuscatingRewritePolicy.java b/src/main/java/io/papermc/paper/logging/StacktraceDeobfuscatingRewritePolicy.java
new file mode 100644
index 0000000000000000000000000000000000000000..5293a59d17eeb711694965816857e66481ff0277
index 0000000000000000000000000000000000000000..d019802a36dbaca4bf299a55d28381e43d6b976f
--- /dev/null
+++ b/src/main/java/io/papermc/paper/logging/StacktraceDeobfuscatingRewritePolicy.java
@@ -0,0 +1,242 @@
@@ -0,0 +1,31 @@
+package io.papermc.paper.logging;
+
+import io.papermc.paper.util.StacktraceDeobfuscator;
+import org.apache.logging.log4j.core.Core;
+import org.apache.logging.log4j.core.LogEvent;
+import org.apache.logging.log4j.core.appender.rewrite.RewritePolicy;
+import org.apache.logging.log4j.core.config.plugins.Plugin;
+import org.apache.logging.log4j.core.config.plugins.PluginFactory;
+import org.jetbrains.annotations.NotNull;
+
+@Plugin(
+ name = "StacktraceDeobfuscatingRewritePolicy",
+ category = Core.CATEGORY_NAME,
+ elementType = "rewritePolicy",
+ printObject = true
+)
+public final class StacktraceDeobfuscatingRewritePolicy implements RewritePolicy {
+ @Override
+ public @NotNull LogEvent rewrite(final @NotNull LogEvent rewrite) {
+ final Throwable thrown = rewrite.getThrown();
+ if (thrown != null) {
+ StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(thrown);
+ }
+ return rewrite;
+ }
+
+ @PluginFactory
+ public static @NotNull StacktraceDeobfuscatingRewritePolicy createPolicy() {
+ return new StacktraceDeobfuscatingRewritePolicy();
+ }
+}
diff --git a/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java b/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
new file mode 100644
index 0000000000000000000000000000000000000000..281fd2dbc7f1281ba882020be2a3481fe8909685
--- /dev/null
+++ b/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
@@ -0,0 +1,223 @@
+package io.papermc.paper.util;
+
+import com.destroystokyo.paper.PaperConfig;
+import com.google.common.base.Charsets;
+import com.google.common.collect.ImmutableMap;
@ -133,11 +170,6 @@ index 0000000000000000000000000000000000000000..5293a59d17eeb711694965816857e664
+import net.fabricmc.mapping.tree.MethodDef;
+import net.fabricmc.mapping.tree.TinyMappingFactory;
+import net.fabricmc.mapping.tree.TinyTree;
+import org.apache.logging.log4j.core.Core;
+import org.apache.logging.log4j.core.LogEvent;
+import org.apache.logging.log4j.core.appender.rewrite.RewritePolicy;
+import org.apache.logging.log4j.core.config.plugins.Plugin;
+import org.apache.logging.log4j.core.config.plugins.PluginFactory;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.objectweb.asm.ClassReader;
@ -146,13 +178,9 @@ index 0000000000000000000000000000000000000000..5293a59d17eeb711694965816857e664
+import org.objectweb.asm.MethodVisitor;
+import org.objectweb.asm.Opcodes;
+
+@Plugin(
+ name = "StacktraceDeobfuscatingRewritePolicy",
+ category = Core.CATEGORY_NAME,
+ elementType = "rewritePolicy",
+ printObject = true
+)
+public final class StacktraceDeobfuscatingRewritePolicy implements RewritePolicy {
+public enum StacktraceDeobfuscator {
+ INSTANCE;
+
+ private static final String MOJANG_PLUS_YARN_NAMESPACE = "mojang+yarn";
+ private static final String SPIGOT_NAMESPACE = "spigot";
+
@ -164,12 +192,12 @@ index 0000000000000000000000000000000000000000..5293a59d17eeb711694965816857e664
+ }
+ });
+
+ StacktraceDeobfuscatingRewritePolicy() {
+ StacktraceDeobfuscator() {
+ this.mappings = loadMappingsIfPresent();
+ }
+
+ private static @Nullable Map<String, ClassMapping> loadMappingsIfPresent() {
+ try (final InputStream mappingsInputStream = StacktraceDeobfuscatingRewritePolicy.class.getClassLoader().getResourceAsStream("mappings/reobf.tiny")) {
+ try (final InputStream mappingsInputStream = StacktraceDeobfuscator.class.getClassLoader().getResourceAsStream("META-INF/mappings/reobf.tiny")) {
+ if (mappingsInputStream == null) {
+ return null;
+ }
@ -208,20 +236,11 @@ index 0000000000000000000000000000000000000000..5293a59d17eeb711694965816857e664
+ }
+ }
+
+ @Override
+ public @NotNull LogEvent rewrite(final @NotNull LogEvent rewrite) {
+ if (!PaperConfig.deobfuscateStacktraces) {
+ return rewrite;
+ }
+
+ final Throwable thrown = rewrite.getThrown();
+ if (thrown != null) {
+ this.deobfuscateThrowable(thrown);
+ }
+ return rewrite;
+ }
+
+ public void deobfuscateThrowable(final Throwable throwable) {
+ if (!PaperConfig.deobfuscateStacktraces) {
+ return;
+ }
+
+ throwable.setStackTrace(this.deobfuscateStacktrace(throwable.getStackTrace()));
+ final Throwable cause = throwable.getCause();
+ if (cause != null) {
@ -233,6 +252,10 @@ index 0000000000000000000000000000000000000000..5293a59d17eeb711694965816857e664
+ }
+
+ public StackTraceElement[] deobfuscateStacktrace(final StackTraceElement[] traceElements) {
+ if (!PaperConfig.deobfuscateStacktraces) {
+ return traceElements;
+ }
+
+ if (this.mappings == null || traceElements.length == 0) {
+ return traceElements;
+ }
@ -313,7 +336,7 @@ index 0000000000000000000000000000000000000000..5293a59d17eeb711694965816857e664
+ }
+
+ private @Nullable Pair<String, String> determineMethodForLine(final @NotNull Class<?> clazz, final int lineNumber) {
+ final Map<Pair<String, String>, IntList> lineMap = this.lineMapCache.computeIfAbsent(clazz, StacktraceDeobfuscatingRewritePolicy::buildLineMap);
+ final Map<Pair<String, String>, IntList> lineMap = this.lineMapCache.computeIfAbsent(clazz, StacktraceDeobfuscator::buildLineMap);
+ for (final var entry : lineMap.entrySet()) {
+ final Pair<String, String> pair = entry.getKey();
+ final IntList lines = entry.getValue();
@ -336,11 +359,6 @@ index 0000000000000000000000000000000000000000..5293a59d17eeb711694965816857e664
+ return rootClassName + ".java";
+ }
+
+ @PluginFactory
+ public static @NotNull StacktraceDeobfuscatingRewritePolicy createPolicy() {
+ return new StacktraceDeobfuscatingRewritePolicy();
+ }
+
+ private record ClassMapping(
+ String obfName,
+ String mojangName,
@ -355,6 +373,74 @@ index 0000000000000000000000000000000000000000..5293a59d17eeb711694965816857e664
+ ) {
+ }
+}
diff --git a/src/main/java/io/papermc/paper/util/TraceUtil.java b/src/main/java/io/papermc/paper/util/TraceUtil.java
index 2d5494d2813b773e60ddba6790b750a9a08f21f8..7695bf44503f161523ea612ef8a884ae574a2e21 100644
--- a/src/main/java/io/papermc/paper/util/TraceUtil.java
+++ b/src/main/java/io/papermc/paper/util/TraceUtil.java
@@ -6,13 +6,15 @@ public final class TraceUtil {
public static void dumpTraceForThread(Thread thread, String reason) {
Bukkit.getLogger().warning(thread.getName() + ": " + reason);
- StackTraceElement[] trace = thread.getStackTrace();
+ StackTraceElement[] trace = StacktraceDeobfuscator.INSTANCE.deobfuscateStacktrace(thread.getStackTrace());
for (StackTraceElement traceElement : trace) {
Bukkit.getLogger().warning("\tat " + traceElement);
}
}
public static void dumpTraceForThread(String reason) {
- new Throwable(reason).printStackTrace();
+ final Throwable throwable = new Throwable(reason);
+ StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(throwable);
+ throwable.printStackTrace();
}
}
diff --git a/src/main/java/net/minecraft/CrashReport.java b/src/main/java/net/minecraft/CrashReport.java
index 09f56e49383d3f5413ad4c28f3a7664e4d9570bd..afb4fd59bfc8cf71d3a7fdc1cdf1b4c565146952 100644
--- a/src/main/java/net/minecraft/CrashReport.java
+++ b/src/main/java/net/minecraft/CrashReport.java
@@ -29,6 +29,7 @@ public class CrashReport {
private final SystemReport systemReport = new SystemReport();
public CrashReport(String message, Throwable cause) {
+ io.papermc.paper.util.StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(cause); // Paper
this.title = message;
this.exception = cause;
this.systemReport.setDetail("CraftBukkit Information", new org.bukkit.craftbukkit.CraftCrashReport()); // CraftBukkit
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index eeefbb86cb88bd1b132bb6e22b4a4572cfb5e22c..6a1fd7a983724d9e16e8aef06052108ba7ed46f1 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -220,6 +220,7 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
com.destroystokyo.paper.PaperConfig.registerCommands();
com.destroystokyo.paper.VersionHistoryManager.INSTANCE.getClass(); // load version history now
io.papermc.paper.brigadier.PaperBrigadierProviderImpl.INSTANCE.getClass(); // init PaperBrigadierProvider
+ io.papermc.paper.util.StacktraceDeobfuscator.INSTANCE.getClass(); // load mappings for stacktrace deobf
// Paper end
this.setPvpAllowed(dedicatedserverproperties.pvp);
diff --git a/src/main/java/org/spigotmc/WatchdogThread.java b/src/main/java/org/spigotmc/WatchdogThread.java
index 4d271cae88c16ed2419f896c728fdff612540500..dcfbe77bdb25d9c58ffb7b75c48bdb580bc0de47 100644
--- a/src/main/java/org/spigotmc/WatchdogThread.java
+++ b/src/main/java/org/spigotmc/WatchdogThread.java
@@ -106,7 +106,7 @@ public class WatchdogThread extends Thread
log.log( Level.SEVERE, "During the run of the server, a plugin set an excessive velocity on an entity" );
log.log( Level.SEVERE, "This may be the cause of the issue, or it may be entirely unrelated" );
log.log( Level.SEVERE, org.bukkit.craftbukkit.CraftServer.excessiveVelEx.getMessage());
- for ( StackTraceElement stack : org.bukkit.craftbukkit.CraftServer.excessiveVelEx.getStackTrace() )
+ for ( StackTraceElement stack : io.papermc.paper.util.StacktraceDeobfuscator.INSTANCE.deobfuscateStacktrace(org.bukkit.craftbukkit.CraftServer.excessiveVelEx.getStackTrace()) ) // Paper
{
log.log( Level.SEVERE, "\t\t" + stack );
}
@@ -194,7 +194,7 @@ public class WatchdogThread extends Thread
}
log.log( Level.SEVERE, "\tStack:" );
//
- for ( StackTraceElement stack : thread.getStackTrace() )
+ for ( StackTraceElement stack : io.papermc.paper.util.StacktraceDeobfuscator.INSTANCE.deobfuscateStacktrace(thread.getStackTrace()) ) // Paper
{
log.log( Level.SEVERE, "\t\t" + stack );
}
diff --git a/src/main/resources/log4j2.xml b/src/main/resources/log4j2.xml
index 67da1aa7a21622fb231d19dede3775a282a4a12e..f91d0df569b2f1d430ea5eee5f53779902a4f32c 100644
--- a/src/main/resources/log4j2.xml