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Added and improved logging. This is helping us as we 

diagnose a problem where we're not correctly emitting
PIC code.

llvm-svn: 109568
This commit is contained in:
Sean Callanan 2010-07-28 01:00:59 +00:00
parent 8aeb0fb5ca
commit cc54bd3cef
5 changed files with 77 additions and 36 deletions
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3
lldb/include/lldb/Expression/RecordingMemoryManager.h
View File

@ -21,6 +21,7 @@
#include "lldb/lldb-forward.h"
#include "lldb/lldb-private.h"
#include "lldb/Core/ClangForward.h"
#include "lldb/Core/Log.h"
#include "llvm/ExecutionEngine/JITMemoryManager.h"
#include "lldb/Expression/ClangExpression.h"
@ -128,6 +129,8 @@ private:
std::map<uint8_t *, unsigned> m_stubs;
std::map<uint8_t *, uintptr_t> m_globals;
std::map<uint8_t *, uint8_t *> m_exception_tables;
lldb_private::Log *m_log;
struct LocalToRemoteAddressRange
{

40
lldb/source/Expression/ClangExpression.cpp
View File

@ -527,6 +527,7 @@ ClangExpression::PrepareIRForTarget (ClangExpressionVariableList &expr_local_var
bool
ClangExpression::JITFunction (const ExecutionContext &exc_context, const char *name)
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS);
llvm::Module *module = m_code_generator_ptr->GetModule();
@ -538,11 +539,41 @@ ClangExpression::JITFunction (const ExecutionContext &exc_context, const char *n
m_jit_mm_ptr = new RecordingMemoryManager();
//llvm::InitializeNativeTarget();
if (m_execution_engine.get() == 0)
m_execution_engine.reset(llvm::ExecutionEngine::createJIT (module, &error, m_jit_mm_ptr));
m_execution_engine.reset(llvm::ExecutionEngine::createJIT (module,
&error,
m_jit_mm_ptr,
CodeGenOpt::Default,
true,
CodeModel::Default));
m_execution_engine->DisableLazyCompilation();
llvm::Function *function = module->getFunction (llvm::StringRef (name));
if (log)
{
const char *relocation_model_string;
switch (llvm::TargetMachine::getRelocationModel())
{
case llvm::Reloc::Default:
relocation_model_string = "Default";
break;
case llvm::Reloc::Static:
relocation_model_string = "Static";
break;
case llvm::Reloc::PIC_:
relocation_model_string = "PIC_++";
break;
case llvm::Reloc::DynamicNoPIC:
relocation_model_string = "DynamicNoPIC";
break;
}
log->Printf("Target machine's relocation model: %s", relocation_model_string);
}
// We don't actually need the function pointer here, this just forces it to get resolved.
void *fun_ptr = m_execution_engine->getPointerToFunction(function);
// Note, you probably won't get here on error, since the LLVM JIT tends to just
@ -558,6 +589,8 @@ ClangExpression::JITFunction (const ExecutionContext &exc_context, const char *n
bool
ClangExpression::WriteJITCode (const ExecutionContext &exc_context)
{
Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS);
if (m_jit_mm_ptr == NULL)
return false;
@ -586,6 +619,9 @@ ClangExpression::WriteJITCode (const ExecutionContext &exc_context)
lldb::addr_t cursor = target_addr;
for (fun_pos = m_jit_mm_ptr->m_functions.begin(); fun_pos != fun_end; fun_pos++)
{
if (log)
log->Printf("Reading [%p-%p] from m_functions", fun_pos->first, fun_pos->second);
lldb::addr_t lstart = (lldb::addr_t) (*fun_pos).first;
lldb::addr_t lend = (lldb::addr_t) (*fun_pos).second;
size_t size = lend - lstart;

18
lldb/source/Expression/IRForTarget.cpp
View File

@ -511,20 +511,22 @@ IRForTarget::runOnModule(Module &M)
return false;
}
// TEMPORARY FOR DEBUGGING
M.dump();
if (!replaceVariables(M, function))
return false;
if (log)
{
for (bbi = function->begin();
bbi != function->end();
++bbi)
{
log->Printf("Rewrote basic block %s for running: \n%s",
bbi->hasName() ? bbi->getNameStr().c_str() : "[anonymous]",
PrintValue(bbi).c_str());
}
std::string s;
raw_string_ostream oss(s);
M.print(oss, NULL);
oss.flush();
log->Printf("Module after preparing for execution: \n%s", s.c_str());
}
return true;

39
lldb/source/Expression/IRToDWARF.cpp
View File

@ -119,9 +119,7 @@ private:
bool
IRToDWARF::runOnBasicBlock(BasicBlock &BB, Relocator &R)
{
lldb_private::Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS);
{
///////////////////////////////////////
// Mark the current block as visited
//
@ -139,29 +137,6 @@ IRToDWARF::runOnBasicBlock(BasicBlock &BB, Relocator &R)
// Translate the current basic block to DWARF
//
if (log)
{
log->Printf("Translating basic block %s:",
BB.hasName() ? BB.getNameStr().c_str() : "[anonymous]");
llvm::BasicBlock::iterator ii;
for (ii = BB.begin();
ii != BB.end();
++ii)
{
llvm::Instruction &inst = *ii;
std::string s;
raw_string_ostream os(s);
inst.print(os);
if (log)
log->Printf(" %s", s.c_str());
}
}
/////////////////////////////////////////////////
// Visit all successors we haven't visited yet
//
@ -210,6 +185,18 @@ IRToDWARF::runOnModule(Module &M)
if (!runOnBasicBlock(function->getEntryBlock(), relocator))
return false;
if (log)
{
std::string s;
raw_string_ostream oss(s);
M.print(oss, NULL);
oss.flush();
log->Printf("Module being translated to DWARF: \n%s", s.c_str());
}
// TEMPORARY: Fail in order to force execution in the target.
return false;

13
lldb/source/Expression/RecordingMemoryManager.cpp
View File

@ -19,6 +19,7 @@ RecordingMemoryManager::RecordingMemoryManager () :
llvm::JITMemoryManager(),
m_default_mm_ap (llvm::JITMemoryManager::CreateDefaultMemManager())
{
m_log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS);
}
RecordingMemoryManager::~RecordingMemoryManager ()
@ -60,6 +61,9 @@ RecordingMemoryManager::endFunctionBody(const llvm::Function *F, uint8_t *Functi
uint8_t *FunctionEnd)
{
m_default_mm_ap->endFunctionBody(F, FunctionStart, FunctionEnd);
if (m_log)
m_log->Printf("Adding [%p-%p] to m_functions",
FunctionStart, FunctionEnd);
m_functions.insert(std::pair<uint8_t *, uint8_t *>(FunctionStart, FunctionEnd));
}
@ -67,6 +71,9 @@ uint8_t *
RecordingMemoryManager::allocateSpace(intptr_t Size, unsigned Alignment)
{
uint8_t *return_value = m_default_mm_ap->allocateSpace(Size, Alignment);
if (m_log)
m_log->Printf("RecordingMemoryManager::allocateSpace(Size=0x%llx, Alignment=%u) = %p",
(uint64_t)Size, Alignment, return_value);
m_spaceBlocks.insert (std::pair<uint8_t *, intptr_t>(return_value, Size));
return return_value;
}
@ -75,6 +82,9 @@ uint8_t *
RecordingMemoryManager::allocateGlobal(uintptr_t Size, unsigned Alignment)
{
uint8_t *return_value = m_default_mm_ap->allocateGlobal(Size, Alignment);
if (m_log)
m_log->Printf("RecordingMemoryManager::allocateGlobal(Size=0x%llx, Alignment=%u) = %p",
(uint64_t)Size, Alignment, return_value);
m_globals.insert (std::pair<uint8_t *, uintptr_t>(return_value, Size));
return return_value;
}
@ -144,6 +154,9 @@ RecordingMemoryManager::GetRemoteRangeForLocal (lldb::addr_t local_address)
void
RecordingMemoryManager::AddToLocalToRemoteMap (lldb::addr_t lstart, size_t size, lldb::addr_t rstart)
{
if (m_log)
m_log->Printf("Adding local [0x%llx-0x%llx], remote [0x%llx-0x%llx] to local->remote map", lstart, lstart + size, rstart, rstart + size);
m_address_map.push_back (LocalToRemoteAddressRange(lstart, size, rstart));
}