Add config to profiling infos

src/browser/print_stats.js

@@ -139,6 +139,11 @@ const print_stats = {
         text += "do_many_cycles avg: " + (do_many_cycles_total / do_many_cycles_count || 0) + "\n";
         text += "wasm memory size: " + (cpu.wasm_memory.buffer.byteLength >> 20) + "m\n";
 
+        text += "Config:\n";
+        text += "MAX_PAGES=" + cpu.wm.exports["get_config"](0) + "\n";
+        text += "JIT_ALWAYS_USE_LOOP_SAFETY=" + cpu.wm.exports["get_config"](1) + "\n";
+        text += "MAX_EXTRA_BASIC_BLOCKS=" + cpu.wm.exports["get_config"](2) + "\n";
+
         return text;
     },
 

src/rust/control_flow.rs

@@ -1,7 +1,7 @@
 use std::collections::{HashMap, HashSet};
 use std::iter;
 
-use jit::{BasicBlock, BasicBlockType};
+use jit::{BasicBlock, BasicBlockType, MAX_EXTRA_BASIC_BLOCKS};
 use profiler;
 
 const ENTRY_NODE_ID: u32 = 0xffff_ffff;
@@ -265,9 +265,7 @@ pub fn loopify(nodes: &Graph) -> Vec<WasmStructure> {
                 );
             }
 
-            let max_extra_basic_blocks = 100;
-
-            if entries_to_group.len() * group.len() > max_extra_basic_blocks {
+            if entries_to_group.len() * group.len() > MAX_EXTRA_BASIC_BLOCKS {
                 let mut subgroup_edges: Graph = Graph::new();
                 for elem in group {
                     subgroup_edges.insert(

src/rust/jit.rs

@@ -70,6 +70,8 @@ pub const JIT_ALWAYS_USE_LOOP_SAFETY: bool = true;
 
 pub const JIT_THRESHOLD: u32 = 200 * 1000;
 
+pub const MAX_EXTRA_BASIC_BLOCKS: usize = 100;
+
 const MAX_INSTRUCTION_LENGTH: u32 = 16;
 
 #[allow(non_upper_case_globals)]
@@ -1956,3 +1958,14 @@ pub fn enter_basic_block(phys_eip: u32) {
         panic!();
     }
 }
+
+#[no_mangle]
+#[cfg(feature = "profiler")]
+pub fn get_config(index: u32) -> u32 {
+    match index {
+        0 => MAX_PAGES as u32,
+        1 => JIT_ALWAYS_USE_LOOP_SAFETY as u32,
+        2 => MAX_EXTRA_BASIC_BLOCKS as u32,
+        _ => 0,
+    }
+}