Enable Dwarf2 debug information in offline assembler for clang compiler
https://bugs.webkit.org/show_bug.cgi?id=157364.
Reviewed by Mark Lam.
Added a new function shouldEnableDebugAnnotations() that determines if
we are using clang and a new enough version to support the debug annotations.
* offlineasm/config.rb:
(shouldEnableDebugAnnotations): Added.
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@200447 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
index ec4166c..46dcdb7 100644
--- a/Source/JavaScriptCore/ChangeLog
+++ b/Source/JavaScriptCore/ChangeLog
@@ -1,3 +1,16 @@
+2016-05-04 Michael Saboff <msaboff@apple.com>
+
+ Enable Dwarf2 debug information in offline assembler for clang compiler
+ https://bugs.webkit.org/show_bug.cgi?id=157364.
+
+ Reviewed by Mark Lam.
+
+ Added a new function shouldEnableDebugAnnotations() that determines if
+ we are using clang and a new enough version to support the debug annotations.
+
+ * offlineasm/config.rb:
+ (shouldEnableDebugAnnotations): Added.
+
2016-05-04 Keith Miller <keith_miller@apple.com>
Unreviewed, fix test for new ArrayIteratorPrototype.next() error message.
diff --git a/Source/JavaScriptCore/offlineasm/config.rb b/Source/JavaScriptCore/offlineasm/config.rb
index 468c5cd..cfbd3cb 100644
--- a/Source/JavaScriptCore/offlineasm/config.rb
+++ b/Source/JavaScriptCore/offlineasm/config.rb
@@ -59,4 +59,25 @@
# 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.
#
-$enableDebugAnnotations = false
+def shouldEnableDebugAnnotations()
+ if ENV['GCC_VERSION'] =~ /\.clang\./ and ENV['TOOLCHAIN_DIR'] != ''
+ clangExecutable = ENV['TOOLCHAIN_DIR'] + '/usr/bin/clang'
+ if File.executable?(clangExecutable)
+ clangVersionOut = %x`#{clangExecutable} --version`
+ if ($? == 0)
+ # clang version 800.0.12 or higher is required for debug annotations
+ versionMatch = /clang-(\d+).(\d+).(\d+)/.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
+ end
+
+ false
+end
+
+$enableDebugAnnotations = shouldEnableDebugAnnotations()
