autofuzz: Fix logs for bug detector findings

Autofuzz tries to print caught exceptions, but this fails in case of bug
detector findings, as the thrown exceptions are intentionally hard to
catch and rethrow themselves if possible.  Due to this behavior the
following line is potentially loged multiple times: `ERROR: Unexpected
exception encountered during autofuzz:`

In this case the exceptions are also only used to abort the current
invocation, logging of the actual findings is done by different
means. So it's save to ignore this kind of exceptions.

src/main/java/com/code_intelligence/jazzer/api/AutofuzzInvocationException.java

@@ -20,6 +20,10 @@
  * Only used internally.
  */
 public class AutofuzzInvocationException extends RuntimeException {
+  public AutofuzzInvocationException() {
+    super();
+  }
+
   public AutofuzzInvocationException(Throwable cause) {
     super(cause);
   }

src/main/java/com/code_intelligence/jazzer/autofuzz/BUILD.bazel

@@ -11,6 +11,7 @@ java_library(
     visibility = ["//visibility:public"],
     deps = [
         "//src/main/java/com/code_intelligence/jazzer/api",
+        "//src/main/java/com/code_intelligence/jazzer/runtime:jazzer_bootstrap_compile_only",
         "//src/main/java/com/code_intelligence/jazzer/utils",
         "//src/main/java/com/code_intelligence/jazzer/utils:log",
         "//src/main/java/com/code_intelligence/jazzer/utils:simple_glob_matcher",

src/main/java/com/code_intelligence/jazzer/autofuzz/Meta.java

@@ -27,6 +27,7 @@
 import com.code_intelligence.jazzer.api.Function4;
 import com.code_intelligence.jazzer.api.Function5;
 import com.code_intelligence.jazzer.api.FuzzedDataProvider;
+import com.code_intelligence.jazzer.runtime.HardToCatchError;
 import com.code_intelligence.jazzer.utils.Utils;
 import io.github.classgraph.ClassGraph;
 import io.github.classgraph.ClassInfoList;
@@ -286,6 +287,9 @@ Object autofuzz(
       // We should ensure that the arguments fed into the method are always valid.
       throw new AutofuzzError(getDebugSummary(method, thisObject, arguments), e);
     } catch (InvocationTargetException e) {
+      if (e.getCause() instanceof HardToCatchError) {
+        throw new AutofuzzInvocationException();
+      }
       throw new AutofuzzInvocationException(e.getCause());
     }
   }
@@ -344,6 +348,9 @@ <R> R autofuzz(
       // constructors of abstract classes or private constructors.
       throw new AutofuzzError(getDebugSummary(constructor, null, arguments), e);
     } catch (InvocationTargetException e) {
+      if (e.getCause() instanceof HardToCatchError) {
+        throw new AutofuzzInvocationException();
+      }
       throw new AutofuzzInvocationException(e.getCause());
     }
   }

src/main/java/com/code_intelligence/jazzer/runtime/BUILD.bazel

@@ -83,6 +83,7 @@ java_library(
     name = "jazzer_bootstrap_compile_only",
     neverlink = True,
     visibility = [
+        "//src/main/java/com/code_intelligence/jazzer/autofuzz:__pkg__",
         "//src/main/java/com/code_intelligence/jazzer/driver:__pkg__",
         "//src/main/java/com/code_intelligence/jazzer/instrumentor:__pkg__",
     ],