[wasm] Write fuzzers for single wasm sections.

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
@@ skipping 2605 matching lines @@
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [ ":internal_config" ]
 }
 
 v8_fuzzer("wasm_code_fuzzer") {
 }
+
+v8_source_set("wasm_types_fuzzer") {
+  sources = [
+    "test/cctest/wasm/wasm-module-runner.cc",
+    "test/cctest/wasm/wasm-module-runner.h",
+    "test/fuzzer/wasm-section-fuzzers.cc",
+    "test/fuzzer/wasm-section-fuzzers.h",
+    "test/fuzzer/wasm-types-section-fuzzer.cc",
+  ]
+
+  deps = [
+    ":fuzzer_support",
+  ]
+
+  configs = [ ":internal_config" ]
+}
+
+v8_source_set("wasm_names_fuzzer") {
+  sources = [
+    "test/cctest/wasm/wasm-module-runner.cc",
+    "test/cctest/wasm/wasm-module-runner.h",
+    "test/fuzzer/wasm-names-section-fuzzer.cc",
+    "test/fuzzer/wasm-section-fuzzers.cc",
+    "test/fuzzer/wasm-section-fuzzers.h",
+  ]
+
+  deps = [
+    ":fuzzer_support",
+  ]
+
+  configs = [ ":internal_config" ]
+}
+
+v8_source_set("wasm_globals_fuzzer") {
+  sources = [
+    "test/cctest/wasm/wasm-module-runner.cc",
+    "test/cctest/wasm/wasm-module-runner.h",
+    "test/fuzzer/wasm-globals-section-fuzzer.cc",
+    "test/fuzzer/wasm-section-fuzzers.cc",
+    "test/fuzzer/wasm-section-fuzzers.h",
+  ]
+
+  deps = [
+    ":fuzzer_support",
+  ]
+
+  configs = [ ":internal_config" ]
+}
+
+v8_source_set("wasm_imports_fuzzer") {
+  sources = [
+    "test/cctest/wasm/wasm-module-runner.cc",
+    "test/cctest/wasm/wasm-module-runner.h",
+    "test/fuzzer/wasm-imports-section-fuzzer.cc",
+    "test/fuzzer/wasm-section-fuzzers.cc",
+    "test/fuzzer/wasm-section-fuzzers.h",
+  ]
+
+  deps = [
+    ":fuzzer_support",
+  ]
+
+  configs = [ ":internal_config" ]
+}
+
+v8_source_set("wasm_function_sigs_fuzzer") {
+  sources = [
+    "test/cctest/wasm/wasm-module-runner.cc",
+    "test/cctest/wasm/wasm-module-runner.h",
+    "test/fuzzer/wasm-function-sigs-section-fuzzer.cc",
+    "test/fuzzer/wasm-section-fuzzers.cc",
+    "test/fuzzer/wasm-section-fuzzers.h",
+  ]
+
+  deps = [
+    ":fuzzer_support",
+  ]
+
+  configs = [ ":internal_config" ]
+}
+
+v8_source_set("wasm_memory_fuzzer") {
+  sources = [
+    "test/cctest/wasm/wasm-module-runner.cc",
+    "test/cctest/wasm/wasm-module-runner.h",
+    "test/fuzzer/wasm-memory-section-fuzzer.cc",
+    "test/fuzzer/wasm-section-fuzzers.cc",
+    "test/fuzzer/wasm-section-fuzzers.h",
+  ]
+
+  deps = [
+    ":fuzzer_support",
+  ]
+
+  configs = [ ":internal_config" ]
+}
+
+v8_source_set("wasm_data_fuzzer") {
+  sources = [
+    "test/cctest/wasm/wasm-module-runner.cc",
+    "test/cctest/wasm/wasm-module-runner.h",
+    "test/fuzzer/wasm-data-section-fuzzer.cc",
+    "test/fuzzer/wasm-section-fuzzers.cc",

[jochen (gone - plz use gerrit), 2016/09/12 14:58:10]

that's also duplicated across all new targets you added?

[ahaas, 2016/09/12 16:10:25]

I introduced another source_set.

+    "test/fuzzer/wasm-section-fuzzers.h",
+  ]
+
+  deps = [
+    ":fuzzer_support",
+  ]
+
+  configs = [ ":internal_config" ]
+}
+
+v8_source_set("wasm_section_fuzzer") {
+  sources = [
+    "test/cctest/wasm/wasm-module-runner.cc",

[jochen (gone - plz use gerrit), 2016/09/12 14:57:21]

can you move this into a separate source_set? we shouldn't have the same file in
multiple targets

[ahaas, 2016/09/12 16:10:25]

Done.

+    "test/cctest/wasm/wasm-module-runner.h",
+    "test/fuzzer/wasm-section-fuzzers.cc",
+    "test/fuzzer/wasm-section-fuzzers.h",
+    "test/fuzzer/wasm-section.cc",
+  ]
+
+  deps = [
+    ":fuzzer_support",
+  ]
+
+  configs = [ ":internal_config" ]
+}
+
+v8_fuzzer("wasm_section_fuzzer") {

[jochen (gone - plz use gerrit), 2016/09/12 14:57:21]

why no fuzzers for the others?

[ahaas, 2016/09/12 16:10:25]

This executable calls all the section fuzzers. The reason why I do not add one
executable per fuzzer is that it would increase linking time of 'make' users. 

+}