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

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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
This commit is contained in:
Filip Pizlo
2013-10-02 00:59:25 +00:00
parent 2b53089bd0
commit 6eb43d2956
16 changed files with 97 additions and 70 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
lib/ExecutionEngine/ExecutionEngineBindings.cpp
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@ -351,12 +351,13 @@ public:
void *Opaque);
virtual ~SimpleBindingMemoryManager();
virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
unsigned SectionID);
virtual uint8_t *allocateCodeSection(
uintptr_t Size, unsigned Alignment, unsigned SectionID,
StringRef SectionName);
virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
unsigned SectionID,
bool isReadOnly);
virtual uint8_t *allocateDataSection(
uintptr_t Size, unsigned Alignment, unsigned SectionID,
StringRef SectionName, bool isReadOnly);
virtual bool finalizeMemory(std::string *ErrMsg);
@ -384,13 +385,17 @@ SimpleBindingMemoryManager::~SimpleBindingMemoryManager() {
}
uint8_t *SimpleBindingMemoryManager::allocateCodeSection(
uintptr_t Size, unsigned Alignment, unsigned SectionID) {
return Functions.AllocateCodeSection(Opaque, Size, Alignment, SectionID);
uintptr_t Size, unsigned Alignment, unsigned SectionID,
StringRef SectionName) {
return Functions.AllocateCodeSection(Opaque, Size, Alignment, SectionID,
SectionName.str().c_str());
}
uint8_t *SimpleBindingMemoryManager::allocateDataSection(
uintptr_t Size, unsigned Alignment, unsigned SectionID, bool isReadOnly) {
uintptr_t Size, unsigned Alignment, unsigned SectionID,
StringRef SectionName, bool isReadOnly) {
return Functions.AllocateDataSection(Opaque, Size, Alignment, SectionID,
SectionName.str().c_str(),
isReadOnly);
}