[Tarantool-patches] [PATCH v2] Add infrastructure for fuzzing testing and fuzzers

[Sergey Bronnikov <sergeyb@tarantool.org>]

- introduce CMake flag to enable building fuzzers
- add fuzzers based on LibFuzzer[1] to csv, http_parser and uri modules

[1] https://llvm.org/docs/LibFuzzer.html

Note: LibFuzzer requires Clang compiler

How-To Use:

$ mkdir build && cd build
$ CC=clang CXX=clang++ cmake -DENABLE_FUZZER=ON ..
$ make -j
$ ./Testing/test_csv corpus/ -max_total_time=60*60*60 -workers=4
...

Follows: #1809
---
 CMakeLists.txt                         |  2 +-
 cmake/profile.cmake                    |  5 +++++
 src/lib/csv/CMakeLists.txt             | 11 +++++++++++
 src/lib/csv/test_csv.c                 | 23 +++++++++++++++++++++++
 src/lib/http_parser/CMakeLists.txt     | 11 +++++++++++
 src/lib/http_parser/test_http_parser.c | 22 ++++++++++++++++++++++
 src/lib/uri/CMakeLists.txt             | 12 ++++++++++++
 src/lib/uri/test_uri.c                 | 22 ++++++++++++++++++++++
 8 files changed, 107 insertions(+), 1 deletion(-)
 create mode 100644 src/lib/csv/test_csv.c
 create mode 100644 src/lib/http_parser/test_http_parser.c
 create mode 100644 src/lib/uri/test_uri.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1d80b6806..99a502e3a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -571,7 +571,7 @@ set(PREFIX ${CMAKE_INSTALL_PREFIX})
 set(options PACKAGE VERSION BUILD C_COMPILER CXX_COMPILER C_FLAGS CXX_FLAGS
     PREFIX
     ENABLE_SSE2 ENABLE_AVX
-    ENABLE_GCOV ENABLE_GPROF ENABLE_VALGRIND ENABLE_ASAN
+    ENABLE_GCOV ENABLE_GPROF ENABLE_VALGRIND ENABLE_ASAN ENABLE_FUZZER
     ENABLE_BACKTRACE
     ENABLE_DOC
     ENABLE_DIST
diff --git a/cmake/profile.cmake b/cmake/profile.cmake
index bc4bf67f5..b9fcd7655 100644
--- a/cmake/profile.cmake
+++ b/cmake/profile.cmake
@@ -42,6 +42,11 @@ else()
     add_definitions(-DNVALGRIND=1)
 endif()
 
+option(ENABLE_FUZZER "Enable fuzzing testing" OFF)
+if (ENABLE_FUZZER)
+    set(TESTING_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Testing")
+endif ()
+
 option(ENABLE_ASAN "Enable AddressSanitizer, a fast memory error detector based on compiler instrumentation" OFF)
 if (ENABLE_ASAN)
     if (CMAKE_COMPILER_IS_GNUCC)
diff --git a/src/lib/csv/CMakeLists.txt b/src/lib/csv/CMakeLists.txt
index 3580e4da2..d5a3ed1f6 100644
--- a/src/lib/csv/CMakeLists.txt
+++ b/src/lib/csv/CMakeLists.txt
@@ -4,3 +4,14 @@ set(lib_sources
 
 set_source_files_compile_flags(${lib_sources})
 add_library(csv STATIC ${lib_sources})
+
+if (ENABLE_FUZZER AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+    set(TestName "test_csv")
+    add_executable(${TestName} ${TestName}.c)
+    set_target_properties(${TestName}
+            PROPERTIES
+            COMPILE_FLAGS "-fsanitize=fuzzer,address -g -O1"
+            LINK_FLAGS "-fsanitize=fuzzer,address")
+    target_link_libraries(${TestName} PRIVATE csv)
+    set_target_properties(${TestName} PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${TESTING_OUTPUT_DIRECTORY}")
+endif ()
diff --git a/src/lib/csv/test_csv.c b/src/lib/csv/test_csv.c
new file mode 100644
index 000000000..aa1703514
--- /dev/null
+++ b/src/lib/csv/test_csv.c
@@ -0,0 +1,23 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include "csv.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  struct csv csv;
+  csv_create(&csv);
+  char *buf = calloc(size, sizeof(char*));
+  if (buf == NULL) {
+     return -1;
+  }
+  memcpy(buf, data, size);
+  buf[size] = '\0';
+  char *end = buf + size;
+  csv_parse_chunk(&csv, buf, end);
+  csv_finish_parsing(&csv);
+  csv_destroy(&csv);
+  free(buf);
+
+  return 0;
+}
diff --git a/src/lib/http_parser/CMakeLists.txt b/src/lib/http_parser/CMakeLists.txt
index a48f83cb6..7af922fbb 100644
--- a/src/lib/http_parser/CMakeLists.txt
+++ b/src/lib/http_parser/CMakeLists.txt
@@ -1 +1,12 @@
 add_library(http_parser STATIC http_parser.c)
+
+if (ENABLE_FUZZER AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+    set(TestName "test_http_parser")
+    add_executable(${TestName} ${TestName}.c)
+    set_target_properties(${TestName}
+            PROPERTIES
+            COMPILE_FLAGS "-fsanitize=fuzzer,address -g -O1"
+            LINK_FLAGS "-fsanitize=fuzzer,address")
+    target_link_libraries(${TestName} PRIVATE http_parser)
+    set_target_properties(${TestName} PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${TESTING_OUTPUT_DIRECTORY}")
+endif ()
diff --git a/src/lib/http_parser/test_http_parser.c b/src/lib/http_parser/test_http_parser.c
new file mode 100644
index 000000000..a189e71e9
--- /dev/null
+++ b/src/lib/http_parser/test_http_parser.c
@@ -0,0 +1,22 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <stddef.h>
+#include "http_parser.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  struct http_parser parser;
+  char *buf = (char*)data;
+  http_parser_create(&parser);
+  parser.hdr_name = (char *)calloc((int)size, sizeof(char));
+  if (parser.hdr_name == NULL) {
+    return -1;
+  }
+  char *end_buf = buf + size;
+  int rc = http_parse_header_line(&parser, &buf, end_buf, size);
+  free(parser.hdr_name);
+  if (rc != 0) {
+    return rc;
+  }
+
+  return 0;
+}
diff --git a/src/lib/uri/CMakeLists.txt b/src/lib/uri/CMakeLists.txt
index 96410e5bf..77f5c5d57 100644
--- a/src/lib/uri/CMakeLists.txt
+++ b/src/lib/uri/CMakeLists.txt
@@ -8,3 +8,15 @@ if (CC_HAS_WNO_IMPLICIT_FALLTHROUGH)
         -Wno-implicit-fallthrough)
 endif()
 add_library(uri STATIC uri.c)
+
+if (ENABLE_FUZZER AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+    set(TestName "test_uri")
+    add_executable(${TestName} ${TestName}.c)
+    add_compile_options(-fsanitize=fuzzer,address -g -O1)
+    set_target_properties(${TestName}
+            PROPERTIES
+            COMPILE_FLAGS "-fsanitize=fuzzer,address -g -O1"
+            LINK_FLAGS "-fsanitize=fuzzer,address")
+    target_link_libraries(${TestName} PRIVATE uri)
+    set_target_properties(${TestName} PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${TESTING_OUTPUT_DIRECTORY}")
+endif ()
diff --git a/src/lib/uri/test_uri.c b/src/lib/uri/test_uri.c
new file mode 100644
index 000000000..ad8db6ef2
--- /dev/null
+++ b/src/lib/uri/test_uri.c
@@ -0,0 +1,22 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <string.h>
+#include "uri.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  char *buf = calloc(size, sizeof(char*));
+  if (!buf) {
+      return -1;
+  }
+  strncpy(buf, (char*)data, size);
+  buf[size] = '\0';
+  struct uri uri;
+  int rc = uri_parse(&uri, buf);
+  free(buf);
+  if (rc != 0) {
+      return rc;
+  }
+
+  return 0;
+}
-- 
2.23.0


-- 
sergeyb@