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Fixed handling of explicitly-declared persistent 

variables.

llvm-svn: 123398
This commit is contained in:
Sean Callanan 2011-01-13 21:23:32 +00:00
parent 657f227d08
commit e1175b7c67
2 changed files with 22 additions and 7 deletions
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5
lldb/source/Expression/ClangExpressionDeclMap.cpp
View File

@ -213,7 +213,7 @@ ClangExpressionDeclMap::AddPersistentVariable
TypeFromUser user_type(ClangASTContext::CopyType(context,
parser_type.GetASTContext(),
parser_type.GetOpaqueQualType()),
context);
context);
if (!m_parser_vars->m_persistent_vars->CreatePersistentVariable (name,
user_type,
@ -939,7 +939,8 @@ ClangExpressionDeclMap::DoMaterializeOnePersistentVariable
return false;
}
if (var_sp->m_flags & ClangExpressionVariable::EVNeedsFreezeDry)
if (var_sp->m_flags & ClangExpressionVariable::EVNeedsFreezeDry ||
var_sp->m_flags & ClangExpressionVariable::EVKeepInTarget)
{
mem = var_sp->m_live_sp->GetValue().GetScalar().ULongLong();

22
lldb/source/Expression/IRForTarget.cpp
View File

@ -816,6 +816,8 @@ bool
IRForTarget::RewritePersistentAlloc (llvm::Instruction *persistent_alloc,
llvm::Module &llvm_module)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
AllocaInst *alloc = dyn_cast<AllocaInst>(persistent_alloc);
MDNode *alloc_md = alloc->getMetadata("clang.decl.ptr");
@ -843,7 +845,7 @@ IRForTarget::RewritePersistentAlloc (llvm::Instruction *persistent_alloc,
return false;
GlobalVariable *persistent_global = new GlobalVariable(llvm_module,
alloc->getType()->getElementType(),
alloc->getType(),
false, /* not constant */
GlobalValue::ExternalLinkage,
NULL, /* no initializer */
@ -861,7 +863,17 @@ IRForTarget::RewritePersistentAlloc (llvm::Instruction *persistent_alloc,
MDNode *persistent_global_md = MDNode::get(llvm_module.getContext(), values, 2);
named_metadata->addOperand(persistent_global_md);
alloc->replaceAllUsesWith(persistent_global);
// Now, since the variable is a pointer variable, we will drop in a load of that
// pointer variable.
LoadInst *persistent_load = new LoadInst (persistent_global, "", alloc);
if (log)
log->Printf("Replacing \"%s\" with \"%s\"",
PrintValue(alloc).c_str(),
PrintValue(persistent_load).c_str());
alloc->replaceAllUsesWith(persistent_load);
alloc->eraseFromParent();
return true;
@ -1006,7 +1018,7 @@ IRForTarget::MaybeHandleVariable (Module &llvm_module, Value *llvm_value_ptr)
clang::QualType qual_type;
const Type *value_type;
if (!name.compare("$__lldb_expr_result"))
if (name[0] == '$')
{
// The $__lldb_expr_result name indicates the the return value has allocated as
// a static variable. Per the comment at ASTResultSynthesizer::SynthesizeBodyResult,
@ -1015,6 +1027,8 @@ IRForTarget::MaybeHandleVariable (Module &llvm_module, Value *llvm_value_ptr)
//
// Consequently, when reporting the size of the type, we report a pointer type pointing
// to the type of $__lldb_expr_result, not the type itself.
//
// We also do this for any user-declared persistent variables.
qual_type = ast_context->getPointerType(clang::QualType::getFromOpaquePtr(opaque_type));
value_type = PointerType::get(global_variable->getType(), 0);
@ -1029,7 +1043,7 @@ IRForTarget::MaybeHandleVariable (Module &llvm_module, Value *llvm_value_ptr)
off_t value_alignment = (ast_context->getTypeAlign(qual_type) + 7) / 8;
if (log)
log->Printf("Type of \"%s\" is [clang \"%s\", lldb \"%s\"] [size %d, align %d]",
log->Printf("Type of \"%s\" is [clang \"%s\", llvm \"%s\"] [size %d, align %d]",
name.c_str(),
qual_type.getAsString().c_str(),
PrintType(value_type).c_str(),