mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-10 06:00:18 +02:00
Ryan Houdek
ba347c49c9
If ProfileStats aren't enabled then `Initialize` early returns, but some of these values weren't being zero initialized which could result in crashes. Ensure all the values in StatAlloc are zero initialized so this doesn't occur.
70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
// SPDX-License-Identifier: MIT
|
|
/*
|
|
$info$
|
|
tags: Common|Profiler
|
|
desc: Frontend profiler common code
|
|
$end_info$
|
|
*/
|
|
#pragma once
|
|
#include <FEXCore/Utils/Profiler.h>
|
|
|
|
namespace FEXCore::Core {
|
|
struct InternalThreadState;
|
|
}
|
|
|
|
#ifdef _M_ARM_64
|
|
static inline void store_memory_barrier() {
|
|
asm volatile("dmb ishst;" ::: "memory");
|
|
}
|
|
|
|
#else
|
|
static inline void store_memory_barrier() {
|
|
// Intentionally empty.
|
|
// x86 is strongly memory ordered with regular loadstores. No need for barrier.
|
|
}
|
|
#endif
|
|
|
|
namespace FEX::Profiler {
|
|
class StatAllocBase {
|
|
protected:
|
|
FEXCore::Profiler::ThreadStats* AllocateSlot(uint32_t TID);
|
|
void DeallocateSlot(FEXCore::Profiler::ThreadStats* AllocatedSlot);
|
|
|
|
uint32_t OffsetFromStat(FEXCore::Profiler::ThreadStats* Stat) const {
|
|
return reinterpret_cast<uint64_t>(Stat) - reinterpret_cast<uint64_t>(Base);
|
|
}
|
|
uint32_t TotalSlotsFromSize() const {
|
|
return (CurrentSize - sizeof(FEXCore::Profiler::ThreadStatsHeader)) / sizeof(FEXCore::Profiler::ThreadStats) - 1;
|
|
}
|
|
static uint32_t TotalSlotsFromSize(uint32_t Size) {
|
|
return (Size - sizeof(FEXCore::Profiler::ThreadStatsHeader)) / sizeof(FEXCore::Profiler::ThreadStats) - 1;
|
|
}
|
|
|
|
static uint32_t SlotIndexFromOffset(uint32_t Offset) {
|
|
return (Offset - sizeof(FEXCore::Profiler::ThreadStatsHeader)) / sizeof(FEXCore::Profiler::ThreadStats);
|
|
}
|
|
|
|
void SaveHeader(FEXCore::Profiler::AppType AppType);
|
|
|
|
void* Base {};
|
|
uint32_t CurrentSize {};
|
|
FEXCore::Profiler::ThreadStatsHeader* Head {};
|
|
FEXCore::Profiler::ThreadStats* Stats {};
|
|
FEXCore::Profiler::ThreadStats* StatTail {};
|
|
uint32_t RemainingSlots {};
|
|
|
|
// Limited to 4MB which should be a few hundred threads of tracking capability.
|
|
// I (Sonicadvance1) wanted to reserve 128MB of VA space because it's cheap, but ran in to a bug when running WINE.
|
|
// WINE allocates [0x7fff'fe00'0000, 0x7fff'ffff'0000) which /consistently/ overlaps with FEX's sigaltstack.
|
|
// This only occurs when this stat allocation size is large as the top-down allocation pushes the alt-stack further.
|
|
// Additionally, only occurs on 48-bit VA systems, as mmap on lesser VA will fail regardless.
|
|
// TODO: Bump allocation size up once FEXCore's allocator can first use the 128TB of blocked VA space on 48-bit systems.
|
|
constexpr static uint32_t MAX_STATS_SIZE = 4 * 1024 * 1024;
|
|
|
|
private:
|
|
virtual uint32_t FrontendAllocateSlots(uint32_t NewSize) = 0;
|
|
bool AllocateMoreSlots();
|
|
};
|
|
|
|
} // namespace FEX::Profiler
|