From 6072b22a0b9a1d84c389e8231fe4b6a97e60d55f Mon Sep 17 00:00:00 2001
From: Liam <byteslice@airmail.cc>
Date: Thu, 1 Dec 2022 22:48:43 -0500
Subject: core: add option to break on unmapped access

---
 src/core/arm/dynarmic/arm_dynarmic_64.cpp | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

(limited to 'src/core/arm/dynarmic/arm_dynarmic_64.cpp')

diff --git a/src/core/arm/dynarmic/arm_dynarmic_64.cpp b/src/core/arm/dynarmic/arm_dynarmic_64.cpp
index cb53d64ba..3df943df7 100644
--- a/src/core/arm/dynarmic/arm_dynarmic_64.cpp
+++ b/src/core/arm/dynarmic/arm_dynarmic_64.cpp
@@ -29,7 +29,9 @@ class DynarmicCallbacks64 : public Dynarmic::A64::UserCallbacks {
 public:
     explicit DynarmicCallbacks64(ARM_Dynarmic_64& parent_)
         : parent{parent_},
-          memory(parent.system.Memory()), debugger_enabled{parent.system.DebuggerEnabled()} {}
+          memory(parent.system.Memory()), debugger_enabled{parent.system.DebuggerEnabled()},
+          check_memory_access{debugger_enabled ||
+                              !Settings::values.cpuopt_ignore_memory_aborts.GetValue()} {}
 
     u8 MemoryRead8(u64 vaddr) override {
         CheckMemoryAccess(vaddr, 1, Kernel::DebugWatchpointType::Read);
@@ -198,6 +200,17 @@ public:
     }
 
     bool CheckMemoryAccess(VAddr addr, u64 size, Kernel::DebugWatchpointType type) {
+        if (!check_memory_access) {
+            return true;
+        }
+
+        if (!memory.IsValidVirtualAddressRange(addr, size)) {
+            LOG_CRITICAL(Core_ARM, "Stopping execution due to unmapped memory access at {:#x}",
+                         addr);
+            parent.jit.load()->HaltExecution(ARM_Interface::no_execute);
+            return false;
+        }
+
         if (!debugger_enabled) {
             return true;
         }
@@ -226,7 +239,8 @@ public:
     Core::Memory::Memory& memory;
     u64 tpidrro_el0 = 0;
     u64 tpidr_el0 = 0;
-    bool debugger_enabled{};
+    const bool debugger_enabled{};
+    const bool check_memory_access{};
     static constexpr u64 minimum_run_cycles = 10000U;
 };
 
@@ -323,6 +337,9 @@ std::shared_ptr<Dynarmic::A64::Jit> ARM_Dynarmic_64::MakeJit(Common::PageTable*
         if (!Settings::values.cpuopt_recompile_exclusives) {
             config.recompile_on_exclusive_fastmem_failure = false;
         }
+        if (!Settings::values.cpuopt_ignore_memory_aborts) {
+            config.check_halt_on_memory_access = true;
+        }
     } else {
         // Unsafe optimizations
         if (Settings::values.cpu_accuracy.GetValue() == Settings::CPUAccuracy::Unsafe) {
-- 
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