Add harness

.github/workflows/mayhem.yml

@@ -51,7 +51,8 @@ jobs:
       fail-fast: false
       matrix:
         mayhemfile:
-          - mayhem/Mayhemfile
+          - mayhem/Mayhemfile_Pad
+          - mayhem/Mayhemfile_dump
 
     steps:
       - uses: actions/checkout@v2

mayhem/Dockerfile

@@ -6,6 +6,9 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get install -y build-essential clang libc
 COPY . /repo
 WORKDIR /repo
 RUN g++ ISOBMFF-Dump/main.cpp /repo/ISOBMFF/source/* -I /repo/ISOBMFF/include/ -o dump
+RUN make -j8
+RUN clang++ /repo/mayhem/fuzz_Pad.cpp -fsanitize=fuzzer,address /repo/ISOBMFF/source/* -I /repo/ISOBMFF/include/ -o /fuzz
 
 FROM ubuntu:22.04 as package
 COPY --from=builder /repo/dump /
+COPY --from=builder /fuzz /fuzz_Pad

mayhem/Mayhemfile_Pad

@@ -0,0 +1,6 @@
+project: isobmff
+target: pad
+
+cmds:
+  - cmd: /fuzz_Pad
+    libfuzzer: true

mayhem/Mayhemfile → mayhem/Mayhemfile_dump

@@ -5,4 +5,3 @@ testsuite:
 
 cmds:
   - cmd: /dump @@
-image: ghcr.io/rnshah9/playground:isobmff

mayhem/fuzz_Pad.cpp

@@ -0,0 +1,16 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <climits>
+
+#include <fuzzer/FuzzedDataProvider.h>
+
+#include "ISOBMFF/Utils.hpp"
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    FuzzedDataProvider provider(data, size);
+    std::string s = provider.ConsumeRandomLengthString();
+    size_t length = provider.ConsumeIntegralInRange(0, 1000);
+
+    ISOBMFF::Utils::Pad(s, length);
+    return 0;
+}