[Lldb-commits] [PATCH] D15092: Fix hang in global static initialization

Adrian McCarthy via lldb-commits lldb-commits at lists.llvm.org
Mon Nov 30 13:57:43 PST 2015

amccarth created this revision.
amccarth added reviewers: EwanCrawford, zturner.
amccarth added a subscriber: lldb-commits.

A previous patch introduced a global static ConstString instance.  On Windows, this results in a hang because constructing the string pool appears to depend on other globals which haven't yet been initialized.

All other instances of static ConstStrings I could find were function static, so I modified the code to use a static function.



Index: source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptRuntime.cpp
--- source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptRuntime.cpp
+++ source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptRuntime.cpp
@@ -182,7 +182,7 @@
     empirical_type<uint32_t> array_size;                 // Number of items in array, only needed for strucrs
     ConstString type_name;                               // Name of type, only needed for structs
-    static const ConstString FallbackStructName;         // Print this as the type name of a struct Element
+    static const ConstString &GetFallbackStructName();   // Print this as the type name of a struct Element
                                                          // If we can't resolve the actual struct name
@@ -250,7 +250,13 @@
-const ConstString RenderScriptRuntime::Element::FallbackStructName("struct");
+const ConstString &
+    static const ConstString FallbackStructName("struct");
+    return FallbackStructName;
 unsigned int RenderScriptRuntime::AllocationDetails::ID = 1;
@@ -1629,7 +1635,7 @@
     if (!elem.type_name.IsEmpty()) // Name already set
-        elem.type_name = Element::FallbackStructName; // Default type name if we don't succeed
+        elem.type_name = Element::GetFallbackStructName(); // Default type name if we don't succeed
     // Find all the global variables from the script rs modules
     VariableList variable_list;
@@ -2428,7 +2434,7 @@
                 strm.Printf("\n(%u, %u, %u) = ", x, y, z);
                 if ((type == Element::RS_TYPE_NONE) && (alloc->element.children.size() > 0) &&
-                    (alloc->element.type_name != Element::FallbackStructName))
+                    (alloc->element.type_name != Element::GetFallbackStructName()))
                     // Here we are dumping an Element of struct type.
                     // This is done using expression evaluation with the name of the struct type and pointer to element.

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