ART: Convert pointer size to enum

Move away from size_t to dedicated enum (class).

Bug: 30373134
Bug: 30419309
Test: m test-art-host
Change-Id: Id453c330f1065012e7d4f9fc24ac477cc9bb9269
diff --git a/runtime/arch/x86/fault_handler_x86.cc b/runtime/arch/x86/fault_handler_x86.cc
index 24e3a0d..533905e 100644
--- a/runtime/arch/x86/fault_handler_x86.cc
+++ b/runtime/arch/x86/fault_handler_x86.cc
@@ -20,6 +20,7 @@
 #include <sys/ucontext.h>
 
 #include "art_method-inl.h"
+#include "base/enums.h"
 #include "base/macros.h"
 #include "globals.h"
 #include "base/logging.h"
@@ -347,11 +348,7 @@
 bool SuspensionHandler::Action(int, siginfo_t*, void* context) {
   // These are the instructions to check for.  The first one is the mov eax, fs:[xxx]
   // where xxx is the offset of the suspend trigger.
-#if defined(__x86_64__)
-  uint32_t trigger = Thread::ThreadSuspendTriggerOffset<8>().Int32Value();
-#else
-  uint32_t trigger = Thread::ThreadSuspendTriggerOffset<4>().Int32Value();
-#endif
+  uint32_t trigger = Thread::ThreadSuspendTriggerOffset<kRuntimePointerSize>().Int32Value();
 
   VLOG(signals) << "Checking for suspension point";
 #if defined(__x86_64__)
diff --git a/runtime/arch/x86/quick_method_frame_info_x86.h b/runtime/arch/x86/quick_method_frame_info_x86.h
index ed1d860..24c671c 100644
--- a/runtime/arch/x86/quick_method_frame_info_x86.h
+++ b/runtime/arch/x86/quick_method_frame_info_x86.h
@@ -56,7 +56,7 @@
 constexpr uint32_t X86CalleeSaveFrameSize(Runtime::CalleeSaveType type) {
   return RoundUp((POPCOUNT(X86CalleeSaveCoreSpills(type)) /* gprs */ +
                   2 * POPCOUNT(X86CalleeSaveFpSpills(type)) /* fprs */ +
-                  1 /* Method* */) * kX86PointerSize, kStackAlignment);
+                  1 /* Method* */) * static_cast<size_t>(kX86PointerSize), kStackAlignment);
 }
 
 constexpr QuickMethodFrameInfo X86CalleeSaveMethodFrameInfo(Runtime::CalleeSaveType type) {
diff --git a/runtime/arch/x86/thread_x86.cc b/runtime/arch/x86/thread_x86.cc
index c39d122..241650e 100644
--- a/runtime/arch/x86/thread_x86.cc
+++ b/runtime/arch/x86/thread_x86.cc
@@ -20,6 +20,7 @@
 #include <sys/types.h>
 
 #include "asm_support_x86.h"
+#include "base/enums.h"
 #include "base/macros.h"
 #include "thread-inl.h"
 #include "thread_list.h"
@@ -136,7 +137,7 @@
 
   // Sanity check that reads from %fs point to this Thread*.
   Thread* self_check;
-  CHECK_EQ(THREAD_SELF_OFFSET, SelfOffset<4>().Int32Value());
+  CHECK_EQ(THREAD_SELF_OFFSET, SelfOffset<PointerSize::k32>().Int32Value());
   __asm__ __volatile__("movl %%fs:(%1), %0"
       : "=r"(self_check)  // output
       : "r"(THREAD_SELF_OFFSET)  // input
@@ -144,9 +145,9 @@
   CHECK_EQ(self_check, this);
 
   // Sanity check other offsets.
-  CHECK_EQ(THREAD_EXCEPTION_OFFSET, ExceptionOffset<4>().Int32Value());
-  CHECK_EQ(THREAD_CARD_TABLE_OFFSET, CardTableOffset<4>().Int32Value());
-  CHECK_EQ(THREAD_ID_OFFSET, ThinLockIdOffset<4>().Int32Value());
+  CHECK_EQ(THREAD_EXCEPTION_OFFSET, ExceptionOffset<PointerSize::k32>().Int32Value());
+  CHECK_EQ(THREAD_CARD_TABLE_OFFSET, CardTableOffset<PointerSize::k32>().Int32Value());
+  CHECK_EQ(THREAD_ID_OFFSET, ThinLockIdOffset<PointerSize::k32>().Int32Value());
 }
 
 void Thread::CleanupCpu() {