Make kFuzzPxLimit sanitizer dependent

Change-Id: Ib70f3c05fc845494c45cb357e70e9602a7e876a3

2 files changed, 13 insertions, 2 deletions

diff --git a/tests/fuzzer/advanced_api_fuzzer.c b/tests/fuzzer/advanced_api_fuzzer.c
index e60840dd..1378d0bc 100644
--- a/tests/fuzzer/advanced_api_fuzzer.c
+++ b/tests/fuzzer/advanced_api_fuzzer.c
@@ -85,7 +85,7 @@ int LLVMFuzzerTestOneInput(const uint8_t* const data, size_t size) {
               scaled_height != config.input.height) {
             // Using the WebPRescalerImport internally can significantly slow
             // down the execution. Avoid timeouts due to that.
-            fuzz_px_limit /= 13;
+            fuzz_px_limit /= 2;
           }
           // A big output canvas can lead to out-of-memory and timeout issues,
           // but a big internal working buffer can too.
diff --git a/tests/fuzzer/fuzz_utils.h b/tests/fuzzer/fuzz_utils.h
index 713a5f40..3a4c5584 100644
--- a/tests/fuzzer/fuzz_utils.h
+++ b/tests/fuzzer/fuzz_utils.h
@@ -28,9 +28,20 @@
 
 //------------------------------------------------------------------------------
 // Arbitrary limits to prevent OOM, timeout, or slow execution.
-//
+
 // The decoded image size, and for animations additionally the canvas size.
+// Enabling some sanitizers slow down runtime significantly.
+// Use a very low threshold in this case to avoid timeouts.
+#if defined(__SANITIZE_ADDRESS__)  // GCC
+static const size_t kFuzzPxLimit = 1024 * 1024 / 10;
+#elif !defined(__has_feature)  // Clang
 static const size_t kFuzzPxLimit = 1024 * 1024;
+#elif __has_feature(address_sanitizer) || __has_feature(memory_sanitizer)
+static const size_t kFuzzPxLimit = 1024 * 1024 / 10;
+#else
+static const size_t kFuzzPxLimit = 1024 * 1024;
+#endif
+
 // Demuxed or decoded animation frames.
 static const int kFuzzFrameLimit = 3;