Merge pull request #4937 from Sonicadvance1/name_vma

Allocator: Name FEX's VMA regions for allocation

FEXCore/Source/Interface/Core/CPUBackend.cpp

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: MIT
 #include "FEXCore/IR/IR.h"
 #include "FEXCore/Utils/AllocatorHooks.h"
+#include "Utils/PrctlUtils.h"
 #include "Interface/Context/Context.h"
 #include "Interface/Core/CPUBackend.h"
 #include "Interface/Core/Dispatcher/Dispatcher.h"
@@ -9,6 +10,7 @@
 #include "LookupCache.h"
 
 #ifndef _WIN32
+#include <linux/prctl.h>
 #include <sys/prctl.h>
 #endif
 
@@ -357,6 +359,10 @@ namespace CPU {
       LogMan::Msg::EFmt("Failed to mprotect last page of code buffer.");
     }
 
+#ifndef _WIN32
+    prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, Ptr, Size, "FEXMemJIT");
+#endif
+
     LookupCache = fextl::make_unique<GuestToHostMap>();
   }
 

FEXCore/Source/Utils/Allocator.cpp

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: MIT
 #include "Utils/Allocator/HostAllocator.h"
+#include "Utils/PrctlUtils.h"
 #include <FEXCore/Utils/Allocator.h>
 #include <FEXCore/Utils/CompilerDefs.h>
 #include <FEXCore/Utils/LogManager.h>
@@ -50,6 +51,10 @@ void* FEX_mmap(void* addr, size_t length, int prot, int flags, int fd, off_t off
     errno = -(uint64_t)Result;
     return (void*)-1;
   }
+
+  if (flags & MAP_ANONYMOUS) {
+    prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, Result, length, "FEXMem");
+  }
   return Result;
 }
 int FEX_munmap(void* addr, size_t length) {

FEXCore/Source/Utils/PrctlUtils.h

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: MIT
+#pragma once
+
+#ifndef _WIN32
+#include <linux/prctl.h>
+#include <sys/mman.h>
+#include <sys/user.h>
+#include <sys/prctl.h>
+
+#ifndef PR_SET_VMA
+#define PR_SET_VMA 0x53564d41
+#endif
+
+#ifndef PR_SET_VMA_ANON_NAME
+#define PR_SET_VMA_ANON_NAME 0
+#endif
+#endif