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Streamlined memory manager hierarchy for MCJIT and RuntimeDyld.

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Patch by Ashok Thirumurthi

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167192 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Kaylor
2012-11-01 00:46:04 +00:00
parent 08e712b9ff
commit 647d6d7d3b
7 changed files with 21 additions and 101 deletions
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21
include/llvm/ExecutionEngine/RuntimeDyld.h
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@@ -24,9 +24,9 @@ class RuntimeDyldImpl;
class ObjectImage;
// RuntimeDyld clients often want to handle the memory management of
// what gets placed where. For JIT clients, this is an abstraction layer
// over the JITMemoryManager, which references objects by their source
// representations in LLVM IR.
// what gets placed where. For JIT clients, this is the subset of
// JITMemoryManager required for dynamic loading of binaries.
//
// FIXME: As the RuntimeDyld fills out, additional routines will be needed
// for the varying types of objects to be allocated.
class RTDyldMemoryManager {
@@ -37,15 +37,26 @@ public:
virtual ~RTDyldMemoryManager();
/// allocateCodeSection - Allocate a memory block of (at least) the given
/// size suitable for executable code.
/// size suitable for 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;
/// allocateDataSection - Allocate a memory block of (at least) the given
/// size suitable for data.
/// 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) = 0;
/// getPointerToNamedFunction - This method returns the address of the
/// specified function. As such it is only useful for resolving library
/// symbols, not code generated symbols.
///
/// If AbortOnFailure is false and no function with the given name is
/// found, this function returns a null pointer. Otherwise, it prints a
/// message to stderr and aborts.
virtual void *getPointerToNamedFunction(const std::string &Name,
bool AbortOnFailure = true) = 0;
};