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rsx/surface_store: More aggressive tag sampling

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- Use a 5-point tap with an X pattern across the target's memory space to reduce chances of false positives
- TODO: Potential false positives identified, requires some minor
restructuring of surface_store
This commit is contained in:
kd-11 2019-02-25 22:30:20 +03:00 committed by kd-11
parent 3a071a9c07
commit fa628f0ac4
1 changed files with 21 additions and 5 deletions
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26
rpcs3/Emu/RSX/Common/surface_store.h
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@ -93,8 +93,7 @@ namespace rsx
struct render_target_descriptor
{
u64 last_use_tag = 0; // tag indicating when this block was last confirmed to have been written to
u32 memory_tag_address = 0u; // memory address of the start of the ROP block
u64 memory_tag_sample = 0ull; // memory sample taken at the memory_tag_address for change testing
std::array<std::pair<u32, u64>, 5> memory_tag_samples;
bool dirty = false;
image_storage_type old_contents = nullptr;
@ -130,17 +129,34 @@ namespace rsx
LOG_TODO(RSX, "Resource used before memory initialization");
}
return (memory_tag_sample == *vm::get_super_ptr<u64>(memory_tag_address));
// Tags are tested in an X pattern
for (const auto &tag : memory_tag_samples)
{
if (tag.second != *reinterpret_cast<u64*>(vm::g_sudo_addr + tag.first))
return false;
}
return true;
}
void queue_tag(u32 address)
{
memory_tag_address = address;
const u32 pitch = get_native_pitch();
const u32 memory_length = pitch * get_surface_height();
memory_tag_samples[0].first = address; // Top left
memory_tag_samples[1].first = address + memory_length - 4; // Bottom right
memory_tag_samples[2].first = address + pitch; // Top right
memory_tag_samples[3].first = address + (memory_length / 2); // Center
memory_tag_samples[4].first = address + memory_length - pitch; // Bottom left
}
void sync_tag()
{
memory_tag_sample = *vm::get_super_ptr<u64>(memory_tag_address);
for (auto &tag : memory_tag_samples)
{
tag.second = *reinterpret_cast<u64*>(vm::g_sudo_addr + tag.first);
}
}
void on_write(u64 write_tag = 0)