webkitgtk Asan Linux Compilation Instructions

gistfile1.txt

 wget --no-check-certificate http://nightly.webkit.org/files/WebKit-SVN-source.tar.bz2 -O WebKit-SVN-source.tar.bz2
 tar jxvf WebKit-SVN-source.tar.bz2
 cd webkit
 echo Y | Tools/gtk/install-dependencies
 Tools/Scripts/update-webkitgtk-libs
 
Apply the following patch:

--- Source/WebKit/PlatformGTK.cmake.orig	2017-09-26 13:04:14.571070291 -0700
+++ Source/WebKit/PlatformGTK.cmake	2017-09-26 13:04:31.871119018 -0700
@@ -1067,7 +1067,7 @@
     install(TARGETS WebKitPluginProcess2 DESTINATION "${LIBEXEC_INSTALL_DIR}")
 
     if (COMPILER_IS_GCC_OR_CLANG)
-        WEBKIT_ADD_TARGET_CXX_FLAGS(WebKitPluginProcess2 -Wno-unused-parameter)
+        WEBKIT_ADD_TARGET_CXX_FLAGS(WebKitPluginProcess2 -Wno-unused-parameter -fsanitize=address -fno-omit-frame-pointer)
     endif ()
 endif () # ENABLE_PLUGIN_PROCESS_GTK2
 
@@ -1094,7 +1094,7 @@
 target_link_libraries(webkit2gtkinjectedbundle WebKit)
 
 if (COMPILER_IS_GCC_OR_CLANG)
-    WEBKIT_ADD_TARGET_CXX_FLAGS(webkit2gtkinjectedbundle -Wno-unused-parameter)
+    WEBKIT_ADD_TARGET_CXX_FLAGS(webkit2gtkinjectedbundle -Wno-unused-parameter -fsanitize=address -fno-omit-frame-pointer)
 endif ()
 
 # Add ${CMAKE_LIBRARY_OUTPUT_DIRECTORY} to LD_LIBRARY_PATH or DYLD_LIBRARY_PATH
@@ -1125,7 +1125,8 @@
     OUTPUT ${CMAKE_BINARY_DIR}/WebKit2-${WEBKITGTK_API_VERSION}.gir
     DEPENDS WebKit
     DEPENDS ${CMAKE_BINARY_DIR}/JavaScriptCore-${WEBKITGTK_API_VERSION}.gir
-    COMMAND CC=${CMAKE_C_COMPILER} CFLAGS=-Wno-deprecated-declarations LDFLAGS=
+    COMMAND CC=${CMAKE_C_COMPILER} CFLAGS="-Wno-deprecated-declarations -fsanitize=address"
+    LDFLAGS=-fsanitize=address
         ${LOADER_LIBRARY_PATH_VAR}="${INTROSPECTION_ADDITIONAL_LIBRARY_PATH}"
         ${INTROSPECTION_SCANNER}
         --quiet
@@ -1169,7 +1170,7 @@
     DEPENDS ${CMAKE_BINARY_DIR}/JavaScriptCore-${WEBKITGTK_API_VERSION}.gir
     DEPENDS ${CMAKE_BINARY_DIR}/WebKit2-${WEBKITGTK_API_VERSION}.gir
     COMMAND CC=${CMAKE_C_COMPILER} CFLAGS=-Wno-deprecated-declarations
-        LDFLAGS="${INTROSPECTION_ADDITIONAL_LDFLAGS}"
+        LDFLAGS=-fsanitize=address "${INTROSPECTION_ADDITIONAL_LDFLAGS}"
         ${LOADER_LIBRARY_PATH_VAR}="${INTROSPECTION_ADDITIONAL_LIBRARY_PATH}"
         ${INTROSPECTION_SCANNER}
         --quiet


After the above patch has been applied:
Tools/Scripts/build-webkit --release --gtk --system-malloc --cmakeargs=-DCMAKE_CXX_FLAGS="-fsanitize=address -fno-omit-frame-pointer -g -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++"

If I didn't add --private, I saw the following crash:
==30237==ERROR: AddressSanitizer: heap-use-after-free on address 0x611000002b60 at pc 0x7fea613b035e bp 0x7ffeca495c70 sp 0x7ffeca495c68
READ of size 1 at 0x611000002b60 thread T0


Tools/Scripts/run-minibrowser --gtk --private