Remove calls to dbg_trace from release builds

src/browser/starter.js

@@ -113,9 +113,6 @@ function V86Starter(options)
         "logop": function(eip, op) { return cpu.debug.logop(eip, op); },
         "microtick": v86.microtick,
         "get_rand_int": function() { return v86util.get_rand_int(); },
-        "dbg_trace": function() {
-            dbg_trace();
-        },
 
         "pic_acknowledge": function() { cpu.pic_acknowledge(); },
 
@@ -164,6 +161,9 @@ function V86Starter(options)
             const str = v86util.read_sized_string_from_mem(wasm_memory, offset, len);
             console.error(str);
         },
+        "dbg_trace_from_wasm": function() {
+            dbg_trace();
+        },
 
         "codegen_finalize": (wasm_table_index, start, end, first_opcode, state_flags) => {
             cpu.codegen_finalize(wasm_table_index, start, end, first_opcode, state_flags);

src/rust/cpu2/cpu.rs

@@ -5,8 +5,6 @@ extern "C" {
     fn cpu_exception_hook(interrupt: i32) -> bool;
     #[no_mangle]
     fn do_task_switch(selector: i32, has_error_code: bool, error_code: i32);
-    #[no_mangle]
-    pub fn dbg_trace();
     //#[no_mangle]
     //fn logop(addr: i32, op: i32);
     #[no_mangle]
@@ -35,6 +33,7 @@ use paging::OrPageFault;
 use profiler;
 use profiler::stat::*;
 use state_flags::CachedStateFlags;
+pub use util::dbg_trace;
 
 /// The offset for our generated functions in the wasm table. Every index less than this is
 /// reserved for rustc's indirect functions

src/rust/util.rs

@@ -81,6 +81,10 @@ extern "C" {
     pub fn abort();
 }
 
+extern "C" {
+    pub fn dbg_trace_from_wasm();
+}
+
 #[cfg(target_arch = "wasm32")]
 use std::string::ToString;
 
@@ -101,3 +105,11 @@ pub fn console_log_to_js_console<T: ToString>(s: T) {
         console_log_from_wasm(s.as_bytes().as_ptr(), len);
     }
 }
+
+pub fn dbg_trace() {
+    if DEBUG {
+        unsafe {
+            dbg_trace_from_wasm();
+        }
+    }
+}