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Merge pull request #1176 from vlj/llvm-fix

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PPU/LLVM: Fix recursive call crashing llvm backend
This commit is contained in:
Raul Tambre 2015-08-11 08:24:07 +03:00
commit 1e9c266457
2 changed files with 21 additions and 8 deletions
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25
rpcs3/Emu/Cell/PPULLVMRecompiler.cpp
View File

@ -296,9 +296,9 @@ const Executable *RecompilationEngine::GetExecutable(u32 address, bool isFunctio
return isFunction ? &executeFunc : &executeUntilReturn;
}
std::mutex* RecompilationEngine::GetMutexForAddress(u32 address) {
std::pair<std::mutex, std::atomic<int> >* RecompilationEngine::GetMutexAndCounterForAddress(u32 address) {
std::lock_guard<std::mutex> lock(m_address_locks_lock);
std::unordered_map<u32, std::mutex>::iterator It = m_address_locks.find(address);
std::unordered_map<u32, std::pair<std::mutex, std::atomic<int>> >::iterator It = m_address_locks.find(address);
if (It == m_address_locks.end())
return nullptr;
return &(It->second);
@ -549,14 +549,23 @@ void RecompilationEngine::CompileBlock(BlockEntry & block_entry) {
std::get<1>(m_address_to_function[block_entry.cfg.start_address]) = nullptr;
}
std::unordered_map<u32, std::mutex>::iterator It2 = m_address_locks.find(block_entry.cfg.start_address);
std::unordered_map<u32, std::pair<std::mutex, std::atomic<int>> >::iterator It2 = m_address_locks.find(block_entry.cfg.start_address);
if (It2 == m_address_locks.end())
{
std::lock_guard<std::mutex> lock(m_address_locks_lock);
(void)m_address_locks[block_entry.cfg.start_address];
m_address_locks[block_entry.cfg.start_address].second.store(0);
}
std::lock_guard<std::mutex> lock(m_address_locks[block_entry.cfg.start_address]);
std::lock_guard<std::mutex> lock(m_address_locks[block_entry.cfg.start_address].first);
int loopiteration = 0;
while (m_address_locks[block_entry.cfg.start_address].second.load() > 0)
{
std::this_thread::yield();
if (loopiteration++ > 10000000)
return;
}
std::get<1>(m_address_to_function[block_entry.cfg.start_address]) = std::unique_ptr<llvm::ExecutionEngine>(compileResult.second);
std::get<0>(m_address_to_function[block_entry.cfg.start_address]) = compileResult.first;
@ -706,13 +715,17 @@ u32 ppu_recompiler_llvm::CPUHybridDecoderRecompiler::ExecuteTillReturn(PPUThread
execution_engine->m_tracer.Trace(Tracer::TraceType::ExitFromCompiledFunction, context >> 32, context & 0xFFFFFFFF);
while (PollStatus(ppu_state) == false) {
std::mutex *mut = execution_engine->m_recompilation_engine->GetMutexForAddress(ppu_state->PC);
std::pair<std::mutex, std::atomic<int>> *mut = execution_engine->m_recompilation_engine->GetMutexAndCounterForAddress(ppu_state->PC);
if (mut) {
std::lock_guard<std::mutex> lock(*mut);
{
std::lock_guard<std::mutex> lock(mut->first);
mut->second.fetch_add(1);
}
const Executable *executable = execution_engine->m_recompilation_engine->GetCompiledExecutableIfAvailable(ppu_state->PC);
auto entry = ppu_state->PC;
u32 exit = (u32)(*executable)(ppu_state, 0);
execution_engine->m_tracer.Trace(Tracer::TraceType::ExitFromCompiledBlock, entry, exit);
mut->second.fetch_sub(1);
if (exit == 0)
return 0;
} else {

4
rpcs3/Emu/Cell/PPULLVMRecompiler.h
View File

@ -1012,7 +1012,7 @@ namespace ppu_recompiler_llvm {
/**
* Get a mutex for an address. Used to avoid modifying a block currently in execution.
**/
std::mutex* GetMutexForAddress(u32 address);
std::pair<std::mutex, std::atomic<int> >* GetMutexAndCounterForAddress(u32 address);
/**
* Get the executable for the specified address if a compiled version is
@ -1107,7 +1107,7 @@ namespace ppu_recompiler_llvm {
typedef std::tuple<Executable, std::unique_ptr<llvm::ExecutionEngine>, u32> ExecutableStorage;
/// Address to ordinal cahce. Key is address.
std::unordered_map<u32, ExecutableStorage> m_address_to_function;
std::unordered_map<u32, std::mutex> m_address_locks;
std::unordered_map<u32, std::pair<std::mutex, std::atomic<int> > > m_address_locks;
/// The time at which the m_address_to_ordinal cache was last cleared
std::chrono::high_resolution_clock::time_point m_last_cache_clear_time;