This threads SectionName through the allocateCodeSection/allocateDataSection APIs, both in C++ and C land.

It's useful for the memory managers that are allocating a section to know what the name of the section is.  
At a minimum, this is useful for low-level debugging - it's customary for JITs to be able to tell you what 
memory they allocated, and as part of any such dump, they should be able to tell you some meta-data about 
what each allocation is for.  This allows clients that supply their own memory managers to do this.  
Additionally, we also envision the SectionName being useful for passing meta-data from within LLVM to an LLVM 
client.

This changes both the C and C++ APIs, and all of the clients of those APIs within LLVM.  I'm assuming that 
it's safe to change the C++ API because that API is allowed to change.  I'm assuming that it's safe to change 
the C API because we haven't shipped the API in a release yet (LLVM 3.3 doesn't include the MCJIT memory 
management C API).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191804 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 10 insertions, 6 deletions

diff --git a/include/llvm/ExecutionEngine/RTDyldMemoryManager.h b/include/llvm/ExecutionEngine/RTDyldMemoryManager.h
index 02e6b19..5932687 100644
--- a/include/llvm/ExecutionEngine/RTDyldMemoryManager.h
+++ b/include/llvm/ExecutionEngine/RTDyldMemoryManager.h
@@ -38,14 +38,16 @@ public:
   /// executable code. The SectionID is a unique identifier assigned by the JIT
   /// engine, and optionally recorded by the memory manager to access a loaded
   /// section.
-  virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
-                                       unsigned SectionID) = 0;
-
+  virtual uint8_t *allocateCodeSection(
+    uintptr_t Size, unsigned Alignment, unsigned SectionID,
+    StringRef SectionName) = 0;
+  
   /// Allocate a memory block of (at least) the given size suitable for data.
   /// The SectionID is a unique identifier assigned by the JIT engine, and
   /// optionally recorded by the memory manager to access a loaded section.
-  virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
-                                       unsigned SectionID, bool IsReadOnly) = 0;
+  virtual uint8_t *allocateDataSection(
+    uintptr_t Size, unsigned Alignment, unsigned SectionID,
+    StringRef SectionName, bool IsReadOnly) = 0;
 
   /// Register the EH frames with the runtime so that c++ exceptions work.
   virtual void registerEHFrames(StringRef SectionData);
diff --git a/include/llvm/ExecutionEngine/SectionMemoryManager.h b/include/llvm/ExecutionEngine/SectionMemoryManager.h
index 6ee2a2a..fd6e41f 100644
--- a/include/llvm/ExecutionEngine/SectionMemoryManager.h
+++ b/include/llvm/ExecutionEngine/SectionMemoryManager.h
@@ -49,7 +49,8 @@ public:
   /// The value of \p Alignment must be a power of two.  If \p Alignment is zero
   /// a default alignment of 16 will be used.
   virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
-                                       unsigned SectionID);
+                                       unsigned SectionID,
+                                       StringRef SectionName);
 
   /// \brief Allocates a memory block of (at least) the given size suitable for
   /// executable code.
@@ -58,6 +59,7 @@ public:
   /// a default alignment of 16 will be used.
   virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
                                        unsigned SectionID,
+                                       StringRef SectionName,
                                        bool isReadOnly);
 
   /// \brief Update section-specific memory permissions and other attributes.