Lagom: Add a Shell parser fuzzer

Meta/Lagom/CMakeLists.txt

@@ -64,10 +64,14 @@ file(GLOB LIBCRYPTO_SUBDIR_SOURCES CONFIGURE_DEPENDS "../../Libraries/LibCrypto/
 file(GLOB LIBTLS_SOURCES CONFIGURE_DEPENDS "../../Libraries/LibTLS/*.cpp")
 file(GLOB SHELL_SOURCES CONFIGURE_DEPENDS "../../Shell/*.cpp")
 file(GLOB SHELL_TESTS CONFIGURE_DEPENDS "../../Shell/Tests/*.sh")
+set(SHELL_MAIN_CPP "../../Shell/main.cpp")
+set(LIB_SHELL_SOURCES ${SHELL_SOURCES})
+list(REMOVE_ITEM LIB_SHELL_SOURCES ${SHELL_MAIN_CPP})
+set(SHELL_SOURCES ${SHELL_MAIN_CPP})
 
 set(LAGOM_REGEX_SOURCES ${LIBREGEX_LIBC_SOURCES} ${LIBREGEX_SOURCES})
 set(LAGOM_CORE_SOURCES ${AK_SOURCES} ${LIBCORE_SOURCES})
-set(LAGOM_MORE_SOURCES ${LIBELF_SOURCES} ${LIBIPC_SOURCES} ${LIBLINE_SOURCES} ${LIBJS_SOURCES} ${LIBJS_SUBDIR_SOURCES} ${LIBX86_SOURCES} ${LIBCRYPTO_SOURCES} ${LIBCOMPRESS_SOURCES} ${LIBCRYPTO_SUBDIR_SOURCES} ${LIBTLS_SOURCES} ${LIBMARKDOWN_SOURCES} ${LIBGEMINI_SOURCES} ${LIBGFX_SOURCES} ${LIBHTTP_SOURCES} ${LAGOM_REGEX_SOURCES})
+set(LAGOM_MORE_SOURCES ${LIBELF_SOURCES} ${LIBIPC_SOURCES} ${LIBLINE_SOURCES} ${LIBJS_SOURCES} ${LIBJS_SUBDIR_SOURCES} ${LIBX86_SOURCES} ${LIBCRYPTO_SOURCES} ${LIBCOMPRESS_SOURCES} ${LIBCRYPTO_SUBDIR_SOURCES} ${LIBTLS_SOURCES} ${LIBMARKDOWN_SOURCES} ${LIBGEMINI_SOURCES} ${LIBGFX_SOURCES} ${LIBHTTP_SOURCES} ${LAGOM_REGEX_SOURCES} ${LIB_SHELL_SOURCES})
 
 include_directories (../../)
 include_directories (../../Libraries/)
@@ -77,8 +81,8 @@ add_library(LagomCore ${LAGOM_CORE_SOURCES})
 
 if (BUILD_LAGOM)
     add_library(Lagom $<TARGET_OBJECTS:LagomCore> ${LAGOM_MORE_SOURCES})
-    
-    if (NOT ENABLE_OSS_FUZZ) 
+
+    if (NOT ENABLE_OSS_FUZZ)
         add_executable(TestApp TestApp.cpp)
         target_link_libraries(TestApp Lagom)
         target_link_libraries(TestApp stdc++)

Meta/Lagom/Fuzzers/CMakeLists.txt

@@ -29,6 +29,7 @@ add_simple_fuzzer(FuzzJs)
 add_simple_fuzzer(FuzzMarkdown)
 add_simple_fuzzer(FuzzRegexECMA262)
 add_simple_fuzzer(FuzzRegexPosixExtended)
+add_simple_fuzzer(FuzzShell)
 
 if (NOT ENABLE_OSS_FUZZ)
 add_executable(FuzzilliJs FuzzilliJs.cpp)

Meta/Lagom/Fuzzers/FuzzShell.cpp

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/StringView.h>
+#include <Shell/Shell.h>
+#include <stddef.h>
+#include <stdint.h>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
+{
+    auto source = AK::StringView(static_cast<const unsigned char*>(data), size);
+    Shell::Parser parser(source);
+    parser.parse();
+    return 0;
+}