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Support for allocation of TLS variables in the JIT. Allocation of a global

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variable is moved to the execution engine. The JIT calls the TargetJITInfo
to allocate thread local storage. Currently, only linux/x86 knows how to
allocate thread local global variables.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58142 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nicolas Geoffray
2008-10-25 15:41:43 +00:00
parent b74f370e43
commit 46fa139e26
7 changed files with 72 additions and 14 deletions
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27
lib/ExecutionEngine/ExecutionEngine.cpp
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@@ -52,6 +52,12 @@ ExecutionEngine::~ExecutionEngine() {
delete Modules[i];
}
char* ExecutionEngine::getMemoryForGV(const GlobalVariable* GV) {
const Type *ElTy = GV->getType()->getElementType();
size_t GVSize = (size_t)getTargetData()->getABITypeSize(ElTy);
return new char[GVSize];
}
/// removeModuleProvider - Remove a ModuleProvider from the list of modules.
/// Release module from ModuleProvider.
Module* ExecutionEngine::removeModuleProvider(ModuleProvider *P,
@@ -873,7 +879,6 @@ void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
/// their initializers into the memory.
///
void ExecutionEngine::emitGlobals() {
const TargetData *TD = getTargetData();
// Loop over all of the global variables in the program, allocating the memory
// to hold them. If there is more than one module, do a prepass over globals
@@ -934,12 +939,7 @@ void ExecutionEngine::emitGlobals() {
}
if (!I->isDeclaration()) {
// Get the type of the global.
const Type *Ty = I->getType()->getElementType();
// Allocate some memory for it!
unsigned Size = TD->getABITypeSize(Ty);
addGlobalMapping(I, new char[Size]);
addGlobalMapping(I, getMemoryForGV(I));
} else {
// External variable reference. Try to use the dynamic loader to
// get a pointer to it.
@@ -991,15 +991,18 @@ void ExecutionEngine::EmitGlobalVariable(const GlobalVariable *GV) {
void *GA = getPointerToGlobalIfAvailable(GV);
DOUT << "Global '" << GV->getName() << "' -> " << GA << "\n";
const Type *ElTy = GV->getType()->getElementType();
size_t GVSize = (size_t)getTargetData()->getABITypeSize(ElTy);
if (GA == 0) {
// If it's not already specified, allocate memory for the global.
GA = new char[GVSize];
GA = getMemoryForGV(GV);
addGlobalMapping(GV, GA);
}
InitializeMemory(GV->getInitializer(), GA);
// Don't initialize if it's thread local, let the client do it.
if (!GV->isThreadLocal())
InitializeMemory(GV->getInitializer(), GA);
const Type *ElTy = GV->getType()->getElementType();
size_t GVSize = (size_t)getTargetData()->getABITypeSize(ElTy);
NumInitBytes += (unsigned)GVSize;
++NumGlobals;
}