From 6c8d844ec535d8e4db0c6aabfae3317aa8aa3926 Mon Sep 17 00:00:00 2001
From: Nekotekina <nekotekina@gmail.com>
Date: Tue, 7 Apr 2020 16:26:22 +0300
Subject: [PATCH] PPU LLVM: fix crash on damaged cache files

---
 Utilities/JIT.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Utilities/JIT.cpp b/Utilities/JIT.cpp
index 056f32c981..a53dd7a942 100644
--- a/Utilities/JIT.cpp
+++ b/Utilities/JIT.cpp
@@ -965,6 +965,11 @@ public:
 			std::vector<uchar> gz = cached.to_vector<uchar>();
 			std::vector<uchar> out;
 			z_stream zs{};
+
+			if (gz.empty()) [[unlikely]]
+			{
+				return nullptr;
+			}
 #ifndef _MSC_VER
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wold-style-cast"
@@ -1015,6 +1020,11 @@ public:
 
 		if (fs::file cached{path, fs::read})
 		{
+			if (cached.size() == 0) [[unlikely]]
+			{
+				return nullptr;
+			}
+
 			auto buf = llvm::WritableMemoryBuffer::getNewUninitMemBuffer(cached.size());
 			cached.read(buf->getBufferStart(), buf->getBufferSize());
 			return buf;
@@ -1208,6 +1218,11 @@ bool jit_compiler::check(const std::string& path)
 		{
 			return true;
 		}
+
+		if (fs::remove_file(path))
+		{
+			jit_log.error("ObjectCache: Removed damaged file: %s", path);
+		}
 	}
 
 	return false;