Clear cached function from wasm Table when we know for sure an index is dirty

src/browser/starter.js

@@ -108,6 +108,7 @@ function V86Starter(options)
             return this["cpu_exception_hook"] && this["cpu_exception_hook"](n);
         },
         "_jit_store_func": function(index) { return cpu.jit_store_func(index); },
+        "_jit_clear_func": function(index) { return cpu.jit_clear_func(index); },
         "_hlt_op": function() { return cpu.hlt_op(); },
         "abort": function() { dbg_assert(false); },
         "_dbg_assert": function() { return cpu.dbg_assert.apply(cpu, arguments); },

src/cpu.js

@@ -412,6 +412,11 @@ CPU.prototype.jit_store_func = function(index)
     this.wm.imports.env.table.set(index, o["exports"]["f"]);
 };
 
+CPU.prototype.jit_clear_func = function(index)
+{
+    this.wm.imports.env.table.set(index, null);
+};
+
 CPU.prototype.get_state = function()
 {
     var state = [];

src/native/cpu.c

@@ -265,6 +265,12 @@ void cycle_internal()
     bool cached = entry->start_addr == phys_addr && entry->is_32 == *is_32;
     bool clean = entry->group_status == group_dirtiness[phys_addr >> DIRTY_ARR_SHIFT];
 
+    if(cached && !clean)
+    {
+        // Remove the cached entry from the Table
+        jit_clear_func(addr_index);
+    }
+
     if(cached && clean)
     {
         // XXX: With the code-generation, we need to figure out how we

src/native/shared.h

@@ -54,4 +54,5 @@ uint32_t group_dirtiness[1 + (0xffffffff >> DIRTY_ARR_SHIFT)] = {0};
 
 void call_indirect(int32_t index);
 void jit_store_func(int32_t index);
+void jit_clear_func(int32_t index);
 #endif