webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 24 insertions, 1 deletions

diff --git a/Source/JavaScriptCore/offlineasm/config.rb b/Source/JavaScriptCore/offlineasm/config.rb
index 4c86eeceb..88a0cf5e8 100644
--- a/Source/JavaScriptCore/offlineasm/config.rb
+++ b/Source/JavaScriptCore/offlineasm/config.rb
@@ -1,4 +1,4 @@
-# Copyright (C) 2012 Apple Inc. All rights reserved.
+# Copyright (C) 2012, 2016 Apple Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -55,3 +55,26 @@ $enableCodeOriginComments = true
 #     ...
 #
 $enableInstrAnnotations = false
+
+# Turns on generation of DWARF2 debug annotions for file and line numbers.
+# Allows for source level debuging of the original .asm files in a debugger.
+#
+def shouldEnableDebugAnnotations()
+    if ENV['GCC_VERSION'] =~ /\.clang\./ and ENV['DT_TOOLCHAIN_DIR'] =~ /Xcode.app/
+        clangVersionOut = %x`xcrun clang --version`
+        if ($? == 0)
+            # clang version 800.0.12 or higher is required for debug annotations
+            versionMatch = /clang-(\d{3,}).(\d{1,3}).(\d{1,3})/.match(clangVersionOut)
+            if versionMatch.length >= 4
+                totalVersion = versionMatch[1].to_i * 1000000 + versionMatch[2].to_i * 1000 + versionMatch[3].to_i
+                if totalVersion >= 800000012
+                    return true
+                end
+            end
+        end
+    end
+
+    false
+end
+
+$enableDebugAnnotations = shouldEnableDebugAnnotations()