Changes between Initial Version and Version 1 of WebKitGTK/Debugging

Timestamp:

Jun 19, 2013, 8:55:47 AM (12 years ago)

Author:

Andres Gomez

Comment:

Initial editing

WebKitGTK/Debugging

@@ +1 @@
+[[PageOutline]]
+
+= Debugging WebKitGTK+ =
+
+You need a compilation with symbols (''take it easy as it'll take some time/hours''):
+{{{
+#!sh
+$ Tools/Scripts/build-webkit --gtk --debug
+}}}
+
+On 32-bits arch it is quite unlikely this build will succeed. If you need a build with debug symbols but still without ASSERTs enabled you can try these options:
+{{{
+#!sh
+$ Tools/Scripts/build-webkit --gtk --disable-fast-malloc --enable-debug-symbols=full --disable-optimizations
+}}}
+
+In other to run ''GtkLauncher'' under ''gdb'' you should use a ''jhbuild'' shell and run ''gdb'' normally or use the ''jhbuild-wrapper'' as follows:
+{{{
+#!sh
+$ Tools/jhbuild/jhbuild-wrapper --gtk run gdb --args WebKitBuild/Debug/Programs/GtkLauncher --debug
+}}}
+
+== Debugging multimedia stuff ==
+
+You can use the environment variable ''GST_DEBUG'':
+{{{
+#!sh
+$ export GST_DEBUG="webkit*:5"
+}}}
+
+To debug a multimedia test inside DRT (Dump Render Tree):
+{{{
+#!sh
+$ Tools/Scripts/run-webkit-tests --gtk --additional-env-var=GST_DEBUG=webkit*:5 --additional-env-var=GST_DEBUG_NO_COLOR=1 http/tests/media/video-play-stall.html
+}}}
+
+== Debugging tests ==
+
+ * In order to run tests inside the @jhbuild@ shell, these two environment variables must be set:
+{{{
+#!sh
+$ export TEST_RUNNER_TEST_PLUGIN_PATH=$WEBKIT_HOME/WebKitBuild/Release/Libraries/.libs/
+$ export TEST_RUNNER_INJECTED_BUNDLE_FILENAME=$WEBKIT_HOME/WebKitBuild/Release/Libraries/libTestRunnerInjectedBundle.la
+}}}
+
+== Debugging issues ==
+
+ * Some times when running the WebKitTestRunner (WK2) you can see linking errors like the following one:
+{{{
+#!sh
+
+(lt-WebKitWebProcess:3392): WARNING **: Error loading the injected bundle (/home/javi/devel/WebKit/webkit.git/WebKitBuild/Debug/Libraries/libTestRunnerInjectedBundle.la): /home/javi/devel/WebKit/webkit.git/WebKitBuild/Debug/Libraries/.libs/libTestRunnerInjectedBundle.so: undefined symbol: _ZTVN7leveldb10ComparatorE
+}}}
+   * One possible cause of such errors are missing symbols in the '''Source/autotools/symbols.filter'''. These symbols are automatically exposed in the by the '''libWebCoreInternals''' library via tags. Such library expose some symbols for testing purposes, just like the WTR application does.
+   * The symbols.filter should be updated by a fresh checkout, but if that's not the case, it's possible to workaround the issue by manually adding the missing symbols to the file.