Update Diagnostics.md

docs/Diagnostics.md

@@ -1,4 +1,22 @@
 
+## Logs
+
+To enable various logs, modify the defines in m3_config.h
+
+```C
+# define d_m3LogParse           0   // .wasm binary decoding info
+# define d_m3LogModule          0   // Wasm module info
+# define d_m3LogCompile         0   // wasm -> metacode generation phase
+# define d_m3LogWasmStack       0   // dump the wasm stack when pushed or popped
+# define d_m3LogEmit            0   // metacode-generation info
+# define d_m3LogCodePages       0   // dump metacode pages when released
+# define d_m3LogExec            0   // low-level interpreter specific logs
+# define d_m3LogRuntime         0   // higher-level runtime information
+# define d_m3LogStackTrace      0   // dump the call stack when traps occur
+# define d_m3LogNativeStack     0   // track the memory usage of the C-stack
+```
+
+
 ## Operation Profiling
 
 To profile the interpreter's operations enable `d_m3EnableOpProfiling` in `m3_config.h`
@@ -38,3 +56,4 @@ their instance counts will be printed to stderr.
             1  op_u32_Xor_ss
             1  op_i64_Subtract_ss
 ```
+