v6.21.3

RandomX: correct memcpy size for JIT initialization

CHANGELOG.md

@@ -1,3 +1,6 @@
+# v6.21.3
+- [#3462](https://github.com/xmrig/xmrig/pull/3462) RandomX: correct memcpy size for JIT initialization.
+
 # v6.21.2
 - The dependencies of all prebuilt releases have been updated. Support for old Ubuntu releases has been dropped.
 - [#2800](https://github.com/xmrig/xmrig/issues/2800) Fixed donation with GhostRider algorithm for builds without KawPow algorithm.

src/crypto/randomx/jit_compiler_a64.cpp

@@ -1078,6 +1078,6 @@ void JitCompilerA64::h_NOP(Instruction& instr, uint32_t& codePos)
 {
 }
 
-InstructionGeneratorA64 JitCompilerA64::engine[257] = {};
+InstructionGeneratorA64 JitCompilerA64::engine[256] = {};
 
 }

src/crypto/randomx/jit_compiler_a64.hpp

@@ -74,7 +74,7 @@ namespace randomx {
 		void enableWriting() const;
 		void enableExecution() const;
 
-		static InstructionGeneratorA64 engine[257];
+		static InstructionGeneratorA64 engine[256];
 
 	private:
 		const bool hugePages;

src/crypto/randomx/jit_compiler_x86.cpp

@@ -1443,6 +1443,6 @@ namespace randomx {
 		emitByte(0x90, code, codePos);
 	}
 
-	alignas(64) InstructionGeneratorX86 JitCompilerX86::engine[257] = {};
+	alignas(64) InstructionGeneratorX86 JitCompilerX86::engine[256] = {};
 
 }

src/crypto/randomx/jit_compiler_x86.hpp

@@ -81,7 +81,7 @@ namespace randomx {
 		void enableWriting() const;
 		void enableExecution() const;
 
-		alignas(64) static InstructionGeneratorX86 engine[257];
+		alignas(64) static InstructionGeneratorX86 engine[256];
 
 	private:
 		int registerUsage[RegistersCount] = {};

src/crypto/randomx/randomx.cpp

@@ -260,8 +260,7 @@ typedef void(randomx::JitCompilerX86::* InstructionGeneratorX86_2)(const randomx
 
 #define JIT_HANDLE(x, prev) do { \
 		const InstructionGeneratorX86_2 p = &randomx::JitCompilerX86::h_##x; \
-		static_assert(sizeof(p) == sizeof(randomx::JitCompilerX86::engine[k]), "Pointer size mismatch"); \
+		memcpy(randomx::JitCompilerX86::engine + k, &p, sizeof(randomx::JitCompilerX86::engine[k])); \
-		memcpy(randomx::JitCompilerX86::engine + k, &p, sizeof(p)); \
 	} while (0)
 
 #elif (XMRIG_ARM == 8)

src/version.h

@@ -22,7 +22,7 @@
 #define APP_ID        "xmrig"
 #define APP_NAME      "XMRig"
 #define APP_DESC      "XMRig miner"
-#define APP_VERSION   "6.21.3-dev"
+#define APP_VERSION   "6.21.3"
 #define APP_DOMAIN    "xmrig.com"
 #define APP_SITE      "www.xmrig.com"
 #define APP_COPYRIGHT "Copyright (C) 2016-2024 xmrig.com"