From a94f5510b66c70d9d0a448fdda900c87baca5555 Mon Sep 17 00:00:00 2001
From: CountBleck <Mr.YouKnowWhoIAm@protonmail.com>
Date: Sat, 30 Sep 2023 13:09:53 -0700
Subject: [PATCH] Add an optional handler for detecting memory.grow() use in
 the runtime

This handler can be used with an import for users not using ESM bindings
to recreate views into memory only when necessary.
---
 std/assembly/rt/index.d.ts                 |    3 +
 std/assembly/rt/stub.ts                    |    1 +
 std/assembly/rt/tlsf.ts                    |    6 +-
 tests/compiler/rt/grow-handler.debug.wat   | 2752 ++++++++++++++++++++
 tests/compiler/rt/grow-handler.js          |   12 +
 tests/compiler/rt/grow-handler.json        |    5 +
 tests/compiler/rt/grow-handler.release.wat | 1896 ++++++++++++++
 tests/compiler/rt/grow-handler.ts          |    7 +
 8 files changed, 4681 insertions(+), 1 deletion(-)
 create mode 100644 tests/compiler/rt/grow-handler.debug.wat
 create mode 100644 tests/compiler/rt/grow-handler.js
 create mode 100644 tests/compiler/rt/grow-handler.json
 create mode 100644 tests/compiler/rt/grow-handler.release.wat
 create mode 100644 tests/compiler/rt/grow-handler.ts

diff --git a/std/assembly/rt/index.d.ts b/std/assembly/rt/index.d.ts
index fbe1a778e1..7828f2c64a 100644
--- a/std/assembly/rt/index.d.ts
+++ b/std/assembly/rt/index.d.ts
@@ -29,6 +29,9 @@ declare function __finalize(ptr: usize): void;
 declare const ASC_RTRACE: bool;
 declare const ASC_PROFILE: bool;
 
+// Memory growth handling
+declare function ASC_RT_GROW_HANDLER(): void;
+
 // Incremental GC constants
 declare const ASC_GC_GRANULARITY: i32;
 declare const ASC_GC_SWEEPFACTOR: i32;
diff --git a/std/assembly/rt/stub.ts b/std/assembly/rt/stub.ts
index a80c6d33c6..c900ce2cad 100644
--- a/std/assembly/rt/stub.ts
+++ b/std/assembly/rt/stub.ts
@@ -18,6 +18,7 @@ function maybeGrowMemory(newOffset: usize): void {
     if (memory.grow(pagesWanted) < 0) {
       if (memory.grow(pagesNeeded) < 0) unreachable(); // out of memory
     }
+    if (isDefined(ASC_RT_GROW_HANDLER)) ASC_RT_GROW_HANDLER();
   }
   offset = newOffset;
 }
diff --git a/std/assembly/rt/tlsf.ts b/std/assembly/rt/tlsf.ts
index 3d135a3bee..b469cefbca 100644
--- a/std/assembly/rt/tlsf.ts
+++ b/std/assembly/rt/tlsf.ts
@@ -444,6 +444,7 @@ function growMemory(root: Root, size: usize): void {
   if (memory.grow(pagesWanted) < 0) {
     if (memory.grow(pagesNeeded) < 0) unreachable();
   }
+  if (isDefined(ASC_RT_GROW_HANDLER)) ASC_RT_GROW_HANDLER();
   let pagesAfter = memory.size();
   addMemory(root, <usize>pagesBefore << 16, <u64>pagesAfter << 16);
 }
@@ -468,7 +469,10 @@ function initialize(): void {
   let rootOffset = (__heap_base + AL_MASK) & ~AL_MASK;
   let pagesBefore = memory.size();
   let pagesNeeded = <i32>((((rootOffset + ROOT_SIZE) + 0xffff) & ~0xffff) >>> 16);
-  if (pagesNeeded > pagesBefore && memory.grow(pagesNeeded - pagesBefore) < 0) unreachable();
+  if (pagesNeeded > pagesBefore) {
+    if (memory.grow(pagesNeeded - pagesBefore) < 0) unreachable();
+    if (isDefined(ASC_RT_GROW_HANDLER)) ASC_RT_GROW_HANDLER();
+  }
   let root = changetype<Root>(rootOffset);
   root.flMap = 0;
   SETTAIL(root, changetype<Block>(0));
diff --git a/tests/compiler/rt/grow-handler.debug.wat b/tests/compiler/rt/grow-handler.debug.wat
new file mode 100644
index 0000000000..493affbf3c
--- /dev/null
+++ b/tests/compiler/rt/grow-handler.debug.wat
@@ -0,0 +1,2752 @@
+(module
+ (type $i32_=>_i32 (func (param i32) (result i32)))
+ (type $i32_i32_=>_none (func (param i32 i32)))
+ (type $i32_=>_none (func (param i32)))
+ (type $none_=>_none (func))
+ (type $i32_i32_=>_i32 (func (param i32 i32) (result i32)))
+ (type $i32_i32_i32_=>_none (func (param i32 i32 i32)))
+ (type $i32_i32_i32_i32_=>_none (func (param i32 i32 i32 i32)))
+ (type $i32_i32_i64_=>_i32 (func (param i32 i32 i64) (result i32)))
+ (type $none_=>_i32 (func (result i32)))
+ (import "env" "abort" (func $~lib/builtins/abort (param i32 i32 i32 i32)))
+ (import "grow" "handler" (func $rt/grow-handler/handler))
+ (global $rt/grow-handler/leak (mut i32) (i32.const 64))
+ (global $~lib/shared/runtime/Runtime.Stub i32 (i32.const 0))
+ (global $~lib/shared/runtime/Runtime.Minimal i32 (i32.const 1))
+ (global $~lib/shared/runtime/Runtime.Incremental i32 (i32.const 2))
+ (global $~lib/rt/itcms/total (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/threshold (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/state (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/visitCount (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/pinSpace (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/iter (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/toSpace (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/white (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/fromSpace (mut i32) (i32.const 0))
+ (global $~lib/rt/tlsf/ROOT (mut i32) (i32.const 0))
+ (global $~lib/native/ASC_LOW_MEMORY_LIMIT i32 (i32.const 0))
+ (global $~lib/native/ASC_RUNTIME i32 (i32.const 2))
+ (global $~lib/rt/__rtti_base i32 (i32.const 592))
+ (global $~lib/memory/__data_end i32 (i32.const 616))
+ (global $~lib/memory/__stack_pointer (mut i32) (i32.const 33384))
+ (global $~lib/memory/__heap_base i32 (i32.const 33384))
+ (memory $0 1)
+ (data $0 (i32.const 12) "\1c\00\00\00\00\00\00\00\00\00\00\00\01\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00")
+ (data $1 (i32.const 44) ",\00\00\00\00\00\00\00\00\00\00\00\04\00\00\00\10\00\00\00 \00\00\00 \00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00")
+ (data $2 (i32.const 92) ",\00\00\00\00\00\00\00\00\00\00\00\02\00\00\00\1c\00\00\00I\00n\00v\00a\00l\00i\00d\00 \00l\00e\00n\00g\00t\00h\00")
+ (data $3 (i32.const 140) ",\00\00\00\00\00\00\00\00\00\00\00\02\00\00\00\1a\00\00\00~\00l\00i\00b\00/\00a\00r\00r\00a\00y\00.\00t\00s\00\00\00")
+ (data $4 (i32.const 188) "<\00\00\00\00\00\00\00\00\00\00\00\02\00\00\00(\00\00\00A\00l\00l\00o\00c\00a\00t\00i\00o\00n\00 \00t\00o\00o\00 \00l\00a\00r\00g\00e\00\00\00\00\00")
+ (data $5 (i32.const 252) "<\00\00\00\00\00\00\00\00\00\00\00\02\00\00\00 \00\00\00~\00l\00i\00b\00/\00r\00t\00/\00i\00t\00c\00m\00s\00.\00t\00s\00\00\00\00\00\00\00\00\00\00\00\00\00")
+ (data $6 (i32.const 320) "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00")
+ (data $7 (i32.const 352) "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00")
+ (data $8 (i32.const 380) "<\00\00\00\00\00\00\00\00\00\00\00\02\00\00\00$\00\00\00I\00n\00d\00e\00x\00 \00o\00u\00t\00 \00o\00f\00 \00r\00a\00n\00g\00e\00\00\00\00\00\00\00\00\00")
+ (data $9 (i32.const 444) ",\00\00\00\00\00\00\00\00\00\00\00\02\00\00\00\14\00\00\00~\00l\00i\00b\00/\00r\00t\00.\00t\00s\00\00\00\00\00\00\00\00\00")
+ (data $10 (i32.const 496) "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00")
+ (data $11 (i32.const 524) "<\00\00\00\00\00\00\00\00\00\00\00\02\00\00\00\1e\00\00\00~\00l\00i\00b\00/\00r\00t\00/\00t\00l\00s\00f\00.\00t\00s\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00")
+ (data $12 (i32.const 592) "\05\00\00\00 \00\00\00 \00\00\00 \00\00\00\00\00\00\00\02\t\00\00")
+ (table $0 1 1 funcref)
+ (elem $0 (i32.const 1))
+ (export "stress" (func $rt/grow-handler/stress))
+ (export "memory" (memory $0))
+ (start $~start)
+ (func $~lib/array/Array<i32>#get:length_ (param $this i32) (result i32)
+  local.get $this
+  i32.load $0 offset=12
+ )
+ (func $~lib/arraybuffer/ArrayBufferView#get:byteLength (param $this i32) (result i32)
+  local.get $this
+  i32.load $0 offset=8
+ )
+ (func $~lib/arraybuffer/ArrayBufferView#get:buffer (param $this i32) (result i32)
+  local.get $this
+  i32.load $0
+ )
+ (func $~lib/rt/common/BLOCK#get:mmInfo (param $this i32) (result i32)
+  local.get $this
+  i32.load $0
+ )
+ (func $~lib/rt/itcms/Object#set:rtSize (param $this i32) (param $rtSize i32)
+  local.get $this
+  local.get $rtSize
+  i32.store $0 offset=16
+ )
+ (func $~lib/rt/itcms/Object#get:rtId (param $this i32) (result i32)
+  local.get $this
+  i32.load $0 offset=12
+ )
+ (func $~lib/rt/itcms/Object#set:nextWithColor (param $this i32) (param $nextWithColor i32)
+  local.get $this
+  local.get $nextWithColor
+  i32.store $0 offset=4
+ )
+ (func $~lib/rt/itcms/Object#set:prev (param $this i32) (param $prev i32)
+  local.get $this
+  local.get $prev
+  i32.store $0 offset=8
+ )
+ (func $~lib/rt/itcms/initLazy (param $space i32) (result i32)
+  local.get $space
+  local.get $space
+  call $~lib/rt/itcms/Object#set:nextWithColor
+  local.get $space
+  local.get $space
+  call $~lib/rt/itcms/Object#set:prev
+  local.get $space
+  return
+ )
+ (func $~lib/rt/itcms/Object#get:nextWithColor (param $this i32) (result i32)
+  local.get $this
+  i32.load $0 offset=4
+ )
+ (func $~lib/rt/itcms/Object#get:next (param $this i32) (result i32)
+  local.get $this
+  call $~lib/rt/itcms/Object#get:nextWithColor
+  i32.const 3
+  i32.const -1
+  i32.xor
+  i32.and
+  return
+ )
+ (func $~lib/rt/itcms/Object#get:color (param $this i32) (result i32)
+  local.get $this
+  call $~lib/rt/itcms/Object#get:nextWithColor
+  i32.const 3
+  i32.and
+  return
+ )
+ (func $~lib/rt/itcms/visitRoots (param $cookie i32)
+  (local $pn i32)
+  (local $iter i32)
+  local.get $cookie
+  call $~lib/rt/__visit_globals
+  global.get $~lib/rt/itcms/pinSpace
+  local.set $pn
+  local.get $pn
+  call $~lib/rt/itcms/Object#get:next
+  local.set $iter
+  loop $while-continue|0
+   local.get $iter
+   local.get $pn
+   i32.ne
+   if
+    i32.const 1
+    drop
+    local.get $iter
+    call $~lib/rt/itcms/Object#get:color
+    i32.const 3
+    i32.eq
+    i32.eqz
+    if
+     i32.const 0
+     i32.const 272
+     i32.const 160
+     i32.const 16
+     call $~lib/builtins/abort
+     unreachable
+    end
+    local.get $iter
+    i32.const 20
+    i32.add
+    local.get $cookie
+    call $~lib/rt/__visit_members
+    local.get $iter
+    call $~lib/rt/itcms/Object#get:next
+    local.set $iter
+    br $while-continue|0
+   end
+  end
+ )
+ (func $~lib/rt/itcms/Object#set:color (param $this i32) (param $color i32)
+  local.get $this
+  local.get $this
+  call $~lib/rt/itcms/Object#get:nextWithColor
+  i32.const 3
+  i32.const -1
+  i32.xor
+  i32.and
+  local.get $color
+  i32.or
+  call $~lib/rt/itcms/Object#set:nextWithColor
+ )
+ (func $~lib/rt/itcms/Object#get:prev (param $this i32) (result i32)
+  local.get $this
+  i32.load $0 offset=8
+ )
+ (func $~lib/rt/itcms/Object#set:next (param $this i32) (param $obj i32)
+  local.get $this
+  local.get $obj
+  local.get $this
+  call $~lib/rt/itcms/Object#get:nextWithColor
+  i32.const 3
+  i32.and
+  i32.or
+  call $~lib/rt/itcms/Object#set:nextWithColor
+ )
+ (func $~lib/rt/itcms/Object#unlink (param $this i32)
+  (local $next i32)
+  (local $prev i32)
+  local.get $this
+  call $~lib/rt/itcms/Object#get:next
+  local.set $next
+  local.get $next
+  i32.const 0
+  i32.eq
+  if
+   i32.const 1
+   drop
+   local.get $this
+   call $~lib/rt/itcms/Object#get:prev
+   i32.const 0
+   i32.eq
+   if (result i32)
+    local.get $this
+    global.get $~lib/memory/__heap_base
+    i32.lt_u
+   else
+    i32.const 0
+   end
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 272
+    i32.const 128
+    i32.const 18
+    call $~lib/builtins/abort
+    unreachable
+   end
+   return
+  end
+  local.get $this
+  call $~lib/rt/itcms/Object#get:prev
+  local.set $prev
+  i32.const 1
+  drop
+  local.get $prev
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 272
+   i32.const 132
+   i32.const 16
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $next
+  local.get $prev
+  call $~lib/rt/itcms/Object#set:prev
+  local.get $prev
+  local.get $next
+  call $~lib/rt/itcms/Object#set:next
+ )
+ (func $~lib/shared/typeinfo/Typeinfo#get:flags (param $this i32) (result i32)
+  local.get $this
+  i32.load $0
+ )
+ (func $~lib/rt/__typeinfo (param $id i32) (result i32)
+  (local $ptr i32)
+  global.get $~lib/rt/__rtti_base
+  local.set $ptr
+  local.get $id
+  local.get $ptr
+  i32.load $0
+  i32.gt_u
+  if
+   i32.const 400
+   i32.const 464
+   i32.const 21
+   i32.const 28
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $ptr
+  i32.const 4
+  i32.add
+  local.get $id
+  i32.const 4
+  i32.mul
+  i32.add
+  call $~lib/shared/typeinfo/Typeinfo#get:flags
+  return
+ )
+ (func $~lib/rt/itcms/Object#get:isPointerfree (param $this i32) (result i32)
+  (local $rtId i32)
+  local.get $this
+  call $~lib/rt/itcms/Object#get:rtId
+  local.set $rtId
+  local.get $rtId
+  i32.const 2
+  i32.le_u
+  if (result i32)
+   i32.const 1
+  else
+   local.get $rtId
+   call $~lib/rt/__typeinfo
+   i32.const 32
+   i32.and
+   i32.const 0
+   i32.ne
+  end
+  return
+ )
+ (func $~lib/rt/itcms/Object#linkTo (param $this i32) (param $list i32) (param $withColor i32)
+  (local $prev i32)
+  local.get $list
+  call $~lib/rt/itcms/Object#get:prev
+  local.set $prev
+  local.get $this
+  local.get $list
+  local.get $withColor
+  i32.or
+  call $~lib/rt/itcms/Object#set:nextWithColor
+  local.get $this
+  local.get $prev
+  call $~lib/rt/itcms/Object#set:prev
+  local.get $prev
+  local.get $this
+  call $~lib/rt/itcms/Object#set:next
+  local.get $list
+  local.get $this
+  call $~lib/rt/itcms/Object#set:prev
+ )
+ (func $~lib/rt/itcms/Object#makeGray (param $this i32)
+  (local $1 i32)
+  local.get $this
+  global.get $~lib/rt/itcms/iter
+  i32.eq
+  if
+   local.get $this
+   call $~lib/rt/itcms/Object#get:prev
+   local.tee $1
+   i32.eqz
+   if (result i32)
+    i32.const 0
+    i32.const 272
+    i32.const 148
+    i32.const 30
+    call $~lib/builtins/abort
+    unreachable
+   else
+    local.get $1
+   end
+   global.set $~lib/rt/itcms/iter
+  end
+  local.get $this
+  call $~lib/rt/itcms/Object#unlink
+  local.get $this
+  global.get $~lib/rt/itcms/toSpace
+  local.get $this
+  call $~lib/rt/itcms/Object#get:isPointerfree
+  if (result i32)
+   global.get $~lib/rt/itcms/white
+   i32.eqz
+  else
+   i32.const 2
+  end
+  call $~lib/rt/itcms/Object#linkTo
+ )
+ (func $~lib/rt/itcms/__visit (param $ptr i32) (param $cookie i32)
+  (local $obj i32)
+  local.get $ptr
+  i32.eqz
+  if
+   return
+  end
+  local.get $ptr
+  i32.const 20
+  i32.sub
+  local.set $obj
+  i32.const 0
+  drop
+  local.get $obj
+  call $~lib/rt/itcms/Object#get:color
+  global.get $~lib/rt/itcms/white
+  i32.eq
+  if
+   local.get $obj
+   call $~lib/rt/itcms/Object#makeGray
+   global.get $~lib/rt/itcms/visitCount
+   i32.const 1
+   i32.add
+   global.set $~lib/rt/itcms/visitCount
+  end
+ )
+ (func $~lib/rt/itcms/visitStack (param $cookie i32)
+  (local $ptr i32)
+  global.get $~lib/memory/__stack_pointer
+  local.set $ptr
+  loop $while-continue|0
+   local.get $ptr
+   global.get $~lib/memory/__heap_base
+   i32.lt_u
+   if
+    local.get $ptr
+    i32.load $0
+    local.get $cookie
+    call $~lib/rt/itcms/__visit
+    local.get $ptr
+    i32.const 4
+    i32.add
+    local.set $ptr
+    br $while-continue|0
+   end
+  end
+ )
+ (func $~lib/rt/itcms/Object#get:size (param $this i32) (result i32)
+  i32.const 4
+  local.get $this
+  call $~lib/rt/common/BLOCK#get:mmInfo
+  i32.const 3
+  i32.const -1
+  i32.xor
+  i32.and
+  i32.add
+  return
+ )
+ (func $~lib/rt/tlsf/Root#set:flMap (param $this i32) (param $flMap i32)
+  local.get $this
+  local.get $flMap
+  i32.store $0
+ )
+ (func $~lib/rt/common/BLOCK#set:mmInfo (param $this i32) (param $mmInfo i32)
+  local.get $this
+  local.get $mmInfo
+  i32.store $0
+ )
+ (func $~lib/rt/tlsf/Block#set:prev (param $this i32) (param $prev i32)
+  local.get $this
+  local.get $prev
+  i32.store $0 offset=4
+ )
+ (func $~lib/rt/tlsf/Block#set:next (param $this i32) (param $next i32)
+  local.get $this
+  local.get $next
+  i32.store $0 offset=8
+ )
+ (func $~lib/rt/tlsf/Block#get:prev (param $this i32) (result i32)
+  local.get $this
+  i32.load $0 offset=4
+ )
+ (func $~lib/rt/tlsf/Block#get:next (param $this i32) (result i32)
+  local.get $this
+  i32.load $0 offset=8
+ )
+ (func $~lib/rt/tlsf/Root#get:flMap (param $this i32) (result i32)
+  local.get $this
+  i32.load $0
+ )
+ (func $~lib/rt/tlsf/removeBlock (param $root i32) (param $block i32)
+  (local $blockInfo i32)
+  (local $size i32)
+  (local $fl i32)
+  (local $sl i32)
+  (local $6 i32)
+  (local $7 i32)
+  (local $boundedSize i32)
+  (local $prev i32)
+  (local $next i32)
+  (local $root|11 i32)
+  (local $fl|12 i32)
+  (local $sl|13 i32)
+  (local $root|14 i32)
+  (local $fl|15 i32)
+  (local $sl|16 i32)
+  (local $head i32)
+  (local $root|18 i32)
+  (local $fl|19 i32)
+  (local $slMap i32)
+  (local $root|21 i32)
+  (local $fl|22 i32)
+  (local $slMap|23 i32)
+  local.get $block
+  call $~lib/rt/common/BLOCK#get:mmInfo
+  local.set $blockInfo
+  i32.const 1
+  drop
+  local.get $blockInfo
+  i32.const 1
+  i32.and
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 268
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $blockInfo
+  i32.const 3
+  i32.const -1
+  i32.xor
+  i32.and
+  local.set $size
+  i32.const 1
+  drop
+  local.get $size
+  i32.const 12
+  i32.ge_u
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 270
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $size
+  i32.const 256
+  i32.lt_u
+  if
+   i32.const 0
+   local.set $fl
+   local.get $size
+   i32.const 4
+   i32.shr_u
+   local.set $sl
+  else
+   local.get $size
+   local.tee $6
+   i32.const 1073741820
+   local.tee $7
+   local.get $6
+   local.get $7
+   i32.lt_u
+   select
+   local.set $boundedSize
+   i32.const 31
+   local.get $boundedSize
+   i32.clz
+   i32.sub
+   local.set $fl
+   local.get $boundedSize
+   local.get $fl
+   i32.const 4
+   i32.sub
+   i32.shr_u
+   i32.const 1
+   i32.const 4
+   i32.shl
+   i32.xor
+   local.set $sl
+   local.get $fl
+   i32.const 8
+   i32.const 1
+   i32.sub
+   i32.sub
+   local.set $fl
+  end
+  i32.const 1
+  drop
+  local.get $fl
+  i32.const 23
+  i32.lt_u
+  if (result i32)
+   local.get $sl
+   i32.const 16
+   i32.lt_u
+  else
+   i32.const 0
+  end
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 284
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $block
+  call $~lib/rt/tlsf/Block#get:prev
+  local.set $prev
+  local.get $block
+  call $~lib/rt/tlsf/Block#get:next
+  local.set $next
+  local.get $prev
+  if
+   local.get $prev
+   local.get $next
+   call $~lib/rt/tlsf/Block#set:next
+  end
+  local.get $next
+  if
+   local.get $next
+   local.get $prev
+   call $~lib/rt/tlsf/Block#set:prev
+  end
+  local.get $block
+  block $~lib/rt/tlsf/GETHEAD|inlined.0 (result i32)
+   local.get $root
+   local.set $root|11
+   local.get $fl
+   local.set $fl|12
+   local.get $sl
+   local.set $sl|13
+   local.get $root|11
+   local.get $fl|12
+   i32.const 4
+   i32.shl
+   local.get $sl|13
+   i32.add
+   i32.const 2
+   i32.shl
+   i32.add
+   i32.load $0 offset=96
+   br $~lib/rt/tlsf/GETHEAD|inlined.0
+  end
+  i32.eq
+  if
+   local.get $root
+   local.set $root|14
+   local.get $fl
+   local.set $fl|15
+   local.get $sl
+   local.set $sl|16
+   local.get $next
+   local.set $head
+   local.get $root|14
+   local.get $fl|15
+   i32.const 4
+   i32.shl
+   local.get $sl|16
+   i32.add
+   i32.const 2
+   i32.shl
+   i32.add
+   local.get $head
+   i32.store $0 offset=96
+   local.get $next
+   i32.eqz
+   if
+    block $~lib/rt/tlsf/GETSL|inlined.0 (result i32)
+     local.get $root
+     local.set $root|18
+     local.get $fl
+     local.set $fl|19
+     local.get $root|18
+     local.get $fl|19
+     i32.const 2
+     i32.shl
+     i32.add
+     i32.load $0 offset=4
+     br $~lib/rt/tlsf/GETSL|inlined.0
+    end
+    local.set $slMap
+    local.get $root
+    local.set $root|21
+    local.get $fl
+    local.set $fl|22
+    local.get $slMap
+    i32.const 1
+    local.get $sl
+    i32.shl
+    i32.const -1
+    i32.xor
+    i32.and
+    local.tee $slMap
+    local.set $slMap|23
+    local.get $root|21
+    local.get $fl|22
+    i32.const 2
+    i32.shl
+    i32.add
+    local.get $slMap|23
+    i32.store $0 offset=4
+    local.get $slMap
+    i32.eqz
+    if
+     local.get $root
+     local.get $root
+     call $~lib/rt/tlsf/Root#get:flMap
+     i32.const 1
+     local.get $fl
+     i32.shl
+     i32.const -1
+     i32.xor
+     i32.and
+     call $~lib/rt/tlsf/Root#set:flMap
+    end
+   end
+  end
+ )
+ (func $~lib/rt/tlsf/insertBlock (param $root i32) (param $block i32)
+  (local $blockInfo i32)
+  (local $block|3 i32)
+  (local $right i32)
+  (local $rightInfo i32)
+  (local $block|6 i32)
+  (local $block|7 i32)
+  (local $left i32)
+  (local $leftInfo i32)
+  (local $size i32)
+  (local $fl i32)
+  (local $sl i32)
+  (local $13 i32)
+  (local $14 i32)
+  (local $boundedSize i32)
+  (local $root|16 i32)
+  (local $fl|17 i32)
+  (local $sl|18 i32)
+  (local $head i32)
+  (local $root|20 i32)
+  (local $fl|21 i32)
+  (local $sl|22 i32)
+  (local $head|23 i32)
+  (local $root|24 i32)
+  (local $fl|25 i32)
+  (local $root|26 i32)
+  (local $fl|27 i32)
+  (local $slMap i32)
+  i32.const 1
+  drop
+  local.get $block
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 201
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $block
+  call $~lib/rt/common/BLOCK#get:mmInfo
+  local.set $blockInfo
+  i32.const 1
+  drop
+  local.get $blockInfo
+  i32.const 1
+  i32.and
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 203
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  block $~lib/rt/tlsf/GETRIGHT|inlined.0 (result i32)
+   local.get $block
+   local.set $block|3
+   local.get $block|3
+   i32.const 4
+   i32.add
+   local.get $block|3
+   call $~lib/rt/common/BLOCK#get:mmInfo
+   i32.const 3
+   i32.const -1
+   i32.xor
+   i32.and
+   i32.add
+   br $~lib/rt/tlsf/GETRIGHT|inlined.0
+  end
+  local.set $right
+  local.get $right
+  call $~lib/rt/common/BLOCK#get:mmInfo
+  local.set $rightInfo
+  local.get $rightInfo
+  i32.const 1
+  i32.and
+  if
+   local.get $root
+   local.get $right
+   call $~lib/rt/tlsf/removeBlock
+   local.get $block
+   local.get $blockInfo
+   i32.const 4
+   i32.add
+   local.get $rightInfo
+   i32.const 3
+   i32.const -1
+   i32.xor
+   i32.and
+   i32.add
+   local.tee $blockInfo
+   call $~lib/rt/common/BLOCK#set:mmInfo
+   block $~lib/rt/tlsf/GETRIGHT|inlined.1 (result i32)
+    local.get $block
+    local.set $block|6
+    local.get $block|6
+    i32.const 4
+    i32.add
+    local.get $block|6
+    call $~lib/rt/common/BLOCK#get:mmInfo
+    i32.const 3
+    i32.const -1
+    i32.xor
+    i32.and
+    i32.add
+    br $~lib/rt/tlsf/GETRIGHT|inlined.1
+   end
+   local.set $right
+   local.get $right
+   call $~lib/rt/common/BLOCK#get:mmInfo
+   local.set $rightInfo
+  end
+  local.get $blockInfo
+  i32.const 2
+  i32.and
+  if
+   block $~lib/rt/tlsf/GETFREELEFT|inlined.0 (result i32)
+    local.get $block
+    local.set $block|7
+    local.get $block|7
+    i32.const 4
+    i32.sub
+    i32.load $0
+    br $~lib/rt/tlsf/GETFREELEFT|inlined.0
+   end
+   local.set $left
+   local.get $left
+   call $~lib/rt/common/BLOCK#get:mmInfo
+   local.set $leftInfo
+   i32.const 1
+   drop
+   local.get $leftInfo
+   i32.const 1
+   i32.and
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 544
+    i32.const 221
+    i32.const 16
+    call $~lib/builtins/abort
+    unreachable
+   end
+   local.get $root
+   local.get $left
+   call $~lib/rt/tlsf/removeBlock
+   local.get $left
+   local.set $block
+   local.get $block
+   local.get $leftInfo
+   i32.const 4
+   i32.add
+   local.get $blockInfo
+   i32.const 3
+   i32.const -1
+   i32.xor
+   i32.and
+   i32.add
+   local.tee $blockInfo
+   call $~lib/rt/common/BLOCK#set:mmInfo
+  end
+  local.get $right
+  local.get $rightInfo
+  i32.const 2
+  i32.or
+  call $~lib/rt/common/BLOCK#set:mmInfo
+  local.get $blockInfo
+  i32.const 3
+  i32.const -1
+  i32.xor
+  i32.and
+  local.set $size
+  i32.const 1
+  drop
+  local.get $size
+  i32.const 12
+  i32.ge_u
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 233
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  i32.const 1
+  drop
+  local.get $block
+  i32.const 4
+  i32.add
+  local.get $size
+  i32.add
+  local.get $right
+  i32.eq
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 234
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $right
+  i32.const 4
+  i32.sub
+  local.get $block
+  i32.store $0
+  local.get $size
+  i32.const 256
+  i32.lt_u
+  if
+   i32.const 0
+   local.set $fl
+   local.get $size
+   i32.const 4
+   i32.shr_u
+   local.set $sl
+  else
+   local.get $size
+   local.tee $13
+   i32.const 1073741820
+   local.tee $14
+   local.get $13
+   local.get $14
+   i32.lt_u
+   select
+   local.set $boundedSize
+   i32.const 31
+   local.get $boundedSize
+   i32.clz
+   i32.sub
+   local.set $fl
+   local.get $boundedSize
+   local.get $fl
+   i32.const 4
+   i32.sub
+   i32.shr_u
+   i32.const 1
+   i32.const 4
+   i32.shl
+   i32.xor
+   local.set $sl
+   local.get $fl
+   i32.const 8
+   i32.const 1
+   i32.sub
+   i32.sub
+   local.set $fl
+  end
+  i32.const 1
+  drop
+  local.get $fl
+  i32.const 23
+  i32.lt_u
+  if (result i32)
+   local.get $sl
+   i32.const 16
+   i32.lt_u
+  else
+   i32.const 0
+  end
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 251
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  block $~lib/rt/tlsf/GETHEAD|inlined.1 (result i32)
+   local.get $root
+   local.set $root|16
+   local.get $fl
+   local.set $fl|17
+   local.get $sl
+   local.set $sl|18
+   local.get $root|16
+   local.get $fl|17
+   i32.const 4
+   i32.shl
+   local.get $sl|18
+   i32.add
+   i32.const 2
+   i32.shl
+   i32.add
+   i32.load $0 offset=96
+   br $~lib/rt/tlsf/GETHEAD|inlined.1
+  end
+  local.set $head
+  local.get $block
+  i32.const 0
+  call $~lib/rt/tlsf/Block#set:prev
+  local.get $block
+  local.get $head
+  call $~lib/rt/tlsf/Block#set:next
+  local.get $head
+  if
+   local.get $head
+   local.get $block
+   call $~lib/rt/tlsf/Block#set:prev
+  end
+  local.get $root
+  local.set $root|20
+  local.get $fl
+  local.set $fl|21
+  local.get $sl
+  local.set $sl|22
+  local.get $block
+  local.set $head|23
+  local.get $root|20
+  local.get $fl|21
+  i32.const 4
+  i32.shl
+  local.get $sl|22
+  i32.add
+  i32.const 2
+  i32.shl
+  i32.add
+  local.get $head|23
+  i32.store $0 offset=96
+  local.get $root
+  local.get $root
+  call $~lib/rt/tlsf/Root#get:flMap
+  i32.const 1
+  local.get $fl
+  i32.shl
+  i32.or
+  call $~lib/rt/tlsf/Root#set:flMap
+  local.get $root
+  local.set $root|26
+  local.get $fl
+  local.set $fl|27
+  block $~lib/rt/tlsf/GETSL|inlined.1 (result i32)
+   local.get $root
+   local.set $root|24
+   local.get $fl
+   local.set $fl|25
+   local.get $root|24
+   local.get $fl|25
+   i32.const 2
+   i32.shl
+   i32.add
+   i32.load $0 offset=4
+   br $~lib/rt/tlsf/GETSL|inlined.1
+  end
+  i32.const 1
+  local.get $sl
+  i32.shl
+  i32.or
+  local.set $slMap
+  local.get $root|26
+  local.get $fl|27
+  i32.const 2
+  i32.shl
+  i32.add
+  local.get $slMap
+  i32.store $0 offset=4
+ )
+ (func $~lib/rt/tlsf/addMemory (param $root i32) (param $start i32) (param $endU64 i64) (result i32)
+  (local $end i32)
+  (local $root|4 i32)
+  (local $tail i32)
+  (local $tailInfo i32)
+  (local $size i32)
+  (local $leftSize i32)
+  (local $left i32)
+  (local $root|10 i32)
+  (local $tail|11 i32)
+  local.get $endU64
+  i32.wrap_i64
+  local.set $end
+  i32.const 1
+  drop
+  local.get $start
+  i64.extend_i32_u
+  local.get $endU64
+  i64.le_u
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 382
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $start
+  i32.const 4
+  i32.add
+  i32.const 15
+  i32.add
+  i32.const 15
+  i32.const -1
+  i32.xor
+  i32.and
+  i32.const 4
+  i32.sub
+  local.set $start
+  local.get $end
+  i32.const 15
+  i32.const -1
+  i32.xor
+  i32.and
+  local.set $end
+  block $~lib/rt/tlsf/GETTAIL|inlined.0 (result i32)
+   local.get $root
+   local.set $root|4
+   local.get $root|4
+   i32.load $0 offset=1568
+   br $~lib/rt/tlsf/GETTAIL|inlined.0
+  end
+  local.set $tail
+  i32.const 0
+  local.set $tailInfo
+  local.get $tail
+  if
+   i32.const 1
+   drop
+   local.get $start
+   local.get $tail
+   i32.const 4
+   i32.add
+   i32.ge_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 544
+    i32.const 389
+    i32.const 16
+    call $~lib/builtins/abort
+    unreachable
+   end
+   local.get $start
+   i32.const 16
+   i32.sub
+   local.get $tail
+   i32.eq
+   if
+    local.get $start
+    i32.const 16
+    i32.sub
+    local.set $start
+    local.get $tail
+    call $~lib/rt/common/BLOCK#get:mmInfo
+    local.set $tailInfo
+   else
+    nop
+   end
+  else
+   i32.const 1
+   drop
+   local.get $start
+   local.get $root
+   i32.const 1572
+   i32.add
+   i32.ge_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 544
+    i32.const 402
+    i32.const 5
+    call $~lib/builtins/abort
+    unreachable
+   end
+  end
+  local.get $end
+  local.get $start
+  i32.sub
+  local.set $size
+  local.get $size
+  i32.const 4
+  i32.const 12
+  i32.add
+  i32.const 4
+  i32.add
+  i32.lt_u
+  if
+   i32.const 0
+   return
+  end
+  local.get $size
+  i32.const 2
+  i32.const 4
+  i32.mul
+  i32.sub
+  local.set $leftSize
+  local.get $start
+  local.set $left
+  local.get $left
+  local.get $leftSize
+  i32.const 1
+  i32.or
+  local.get $tailInfo
+  i32.const 2
+  i32.and
+  i32.or
+  call $~lib/rt/common/BLOCK#set:mmInfo
+  local.get $left
+  i32.const 0
+  call $~lib/rt/tlsf/Block#set:prev
+  local.get $left
+  i32.const 0
+  call $~lib/rt/tlsf/Block#set:next
+  local.get $start
+  i32.const 4
+  i32.add
+  local.get $leftSize
+  i32.add
+  local.set $tail
+  local.get $tail
+  i32.const 0
+  i32.const 2
+  i32.or
+  call $~lib/rt/common/BLOCK#set:mmInfo
+  local.get $root
+  local.set $root|10
+  local.get $tail
+  local.set $tail|11
+  local.get $root|10
+  local.get $tail|11
+  i32.store $0 offset=1568
+  local.get $root
+  local.get $left
+  call $~lib/rt/tlsf/insertBlock
+  i32.const 1
+  return
+ )
+ (func $~lib/rt/tlsf/initialize
+  (local $rootOffset i32)
+  (local $pagesBefore i32)
+  (local $pagesNeeded i32)
+  (local $root i32)
+  (local $root|4 i32)
+  (local $tail i32)
+  (local $fl i32)
+  (local $root|7 i32)
+  (local $fl|8 i32)
+  (local $slMap i32)
+  (local $sl i32)
+  (local $root|11 i32)
+  (local $fl|12 i32)
+  (local $sl|13 i32)
+  (local $head i32)
+  (local $memStart i32)
+  i32.const 0
+  drop
+  global.get $~lib/memory/__heap_base
+  i32.const 15
+  i32.add
+  i32.const 15
+  i32.const -1
+  i32.xor
+  i32.and
+  local.set $rootOffset
+  memory.size $0
+  local.set $pagesBefore
+  local.get $rootOffset
+  i32.const 1572
+  i32.add
+  i32.const 65535
+  i32.add
+  i32.const 65535
+  i32.const -1
+  i32.xor
+  i32.and
+  i32.const 16
+  i32.shr_u
+  local.set $pagesNeeded
+  local.get $pagesNeeded
+  local.get $pagesBefore
+  i32.gt_s
+  if
+   local.get $pagesNeeded
+   local.get $pagesBefore
+   i32.sub
+   memory.grow $0
+   i32.const 0
+   i32.lt_s
+   if
+    unreachable
+   end
+   i32.const 1
+   drop
+   call $rt/grow-handler/handler
+  end
+  local.get $rootOffset
+  local.set $root
+  local.get $root
+  i32.const 0
+  call $~lib/rt/tlsf/Root#set:flMap
+  local.get $root
+  local.set $root|4
+  i32.const 0
+  local.set $tail
+  local.get $root|4
+  local.get $tail
+  i32.store $0 offset=1568
+  i32.const 0
+  local.set $fl
+  loop $for-loop|0
+   local.get $fl
+   i32.const 23
+   i32.lt_u
+   if
+    local.get $root
+    local.set $root|7
+    local.get $fl
+    local.set $fl|8
+    i32.const 0
+    local.set $slMap
+    local.get $root|7
+    local.get $fl|8
+    i32.const 2
+    i32.shl
+    i32.add
+    local.get $slMap
+    i32.store $0 offset=4
+    i32.const 0
+    local.set $sl
+    loop $for-loop|1
+     local.get $sl
+     i32.const 16
+     i32.lt_u
+     if
+      local.get $root
+      local.set $root|11
+      local.get $fl
+      local.set $fl|12
+      local.get $sl
+      local.set $sl|13
+      i32.const 0
+      local.set $head
+      local.get $root|11
+      local.get $fl|12
+      i32.const 4
+      i32.shl
+      local.get $sl|13
+      i32.add
+      i32.const 2
+      i32.shl
+      i32.add
+      local.get $head
+      i32.store $0 offset=96
+      local.get $sl
+      i32.const 1
+      i32.add
+      local.set $sl
+      br $for-loop|1
+     end
+    end
+    local.get $fl
+    i32.const 1
+    i32.add
+    local.set $fl
+    br $for-loop|0
+   end
+  end
+  local.get $rootOffset
+  i32.const 1572
+  i32.add
+  local.set $memStart
+  i32.const 0
+  drop
+  local.get $root
+  local.get $memStart
+  memory.size $0
+  i64.extend_i32_s
+  i64.const 16
+  i64.shl
+  call $~lib/rt/tlsf/addMemory
+  drop
+  local.get $root
+  global.set $~lib/rt/tlsf/ROOT
+ )
+ (func $~lib/rt/tlsf/checkUsedBlock (param $ptr i32) (result i32)
+  (local $block i32)
+  local.get $ptr
+  i32.const 4
+  i32.sub
+  local.set $block
+  local.get $ptr
+  i32.const 0
+  i32.ne
+  if (result i32)
+   local.get $ptr
+   i32.const 15
+   i32.and
+   i32.eqz
+  else
+   i32.const 0
+  end
+  if (result i32)
+   local.get $block
+   call $~lib/rt/common/BLOCK#get:mmInfo
+   i32.const 1
+   i32.and
+   i32.eqz
+  else
+   i32.const 0
+  end
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 566
+   i32.const 3
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $block
+  return
+ )
+ (func $~lib/rt/tlsf/freeBlock (param $root i32) (param $block i32)
+  i32.const 0
+  drop
+  local.get $block
+  local.get $block
+  call $~lib/rt/common/BLOCK#get:mmInfo
+  i32.const 1
+  i32.or
+  call $~lib/rt/common/BLOCK#set:mmInfo
+  local.get $root
+  local.get $block
+  call $~lib/rt/tlsf/insertBlock
+ )
+ (func $~lib/rt/tlsf/__free (param $ptr i32)
+  local.get $ptr
+  global.get $~lib/memory/__heap_base
+  i32.lt_u
+  if
+   return
+  end
+  global.get $~lib/rt/tlsf/ROOT
+  i32.eqz
+  if
+   call $~lib/rt/tlsf/initialize
+  end
+  global.get $~lib/rt/tlsf/ROOT
+  local.get $ptr
+  call $~lib/rt/tlsf/checkUsedBlock
+  call $~lib/rt/tlsf/freeBlock
+ )
+ (func $~lib/rt/itcms/free (param $obj i32)
+  local.get $obj
+  global.get $~lib/memory/__heap_base
+  i32.lt_u
+  if
+   local.get $obj
+   i32.const 0
+   call $~lib/rt/itcms/Object#set:nextWithColor
+   local.get $obj
+   i32.const 0
+   call $~lib/rt/itcms/Object#set:prev
+  else
+   global.get $~lib/rt/itcms/total
+   local.get $obj
+   call $~lib/rt/itcms/Object#get:size
+   i32.sub
+   global.set $~lib/rt/itcms/total
+   i32.const 0
+   drop
+   local.get $obj
+   i32.const 4
+   i32.add
+   call $~lib/rt/tlsf/__free
+  end
+ )
+ (func $~lib/rt/itcms/step (result i32)
+  (local $obj i32)
+  (local $1 i32)
+  (local $black i32)
+  (local $from i32)
+  block $break|0
+   block $case2|0
+    block $case1|0
+     block $case0|0
+      global.get $~lib/rt/itcms/state
+      local.set $1
+      local.get $1
+      i32.const 0
+      i32.eq
+      br_if $case0|0
+      local.get $1
+      i32.const 1
+      i32.eq
+      br_if $case1|0
+      local.get $1
+      i32.const 2
+      i32.eq
+      br_if $case2|0
+      br $break|0
+     end
+     i32.const 1
+     global.set $~lib/rt/itcms/state
+     i32.const 0
+     global.set $~lib/rt/itcms/visitCount
+     i32.const 0
+     call $~lib/rt/itcms/visitRoots
+     global.get $~lib/rt/itcms/toSpace
+     global.set $~lib/rt/itcms/iter
+     global.get $~lib/rt/itcms/visitCount
+     i32.const 1
+     i32.mul
+     return
+    end
+    global.get $~lib/rt/itcms/white
+    i32.eqz
+    local.set $black
+    global.get $~lib/rt/itcms/iter
+    call $~lib/rt/itcms/Object#get:next
+    local.set $obj
+    loop $while-continue|1
+     local.get $obj
+     global.get $~lib/rt/itcms/toSpace
+     i32.ne
+     if
+      local.get $obj
+      global.set $~lib/rt/itcms/iter
+      local.get $obj
+      call $~lib/rt/itcms/Object#get:color
+      local.get $black
+      i32.ne
+      if
+       local.get $obj
+       local.get $black
+       call $~lib/rt/itcms/Object#set:color
+       i32.const 0
+       global.set $~lib/rt/itcms/visitCount
+       local.get $obj
+       i32.const 20
+       i32.add
+       i32.const 0
+       call $~lib/rt/__visit_members
+       global.get $~lib/rt/itcms/visitCount
+       i32.const 1
+       i32.mul
+       return
+      end
+      local.get $obj
+      call $~lib/rt/itcms/Object#get:next
+      local.set $obj
+      br $while-continue|1
+     end
+    end
+    i32.const 0
+    global.set $~lib/rt/itcms/visitCount
+    i32.const 0
+    call $~lib/rt/itcms/visitRoots
+    global.get $~lib/rt/itcms/iter
+    call $~lib/rt/itcms/Object#get:next
+    local.set $obj
+    local.get $obj
+    global.get $~lib/rt/itcms/toSpace
+    i32.eq
+    if
+     i32.const 0
+     call $~lib/rt/itcms/visitStack
+     global.get $~lib/rt/itcms/iter
+     call $~lib/rt/itcms/Object#get:next
+     local.set $obj
+     loop $while-continue|2
+      local.get $obj
+      global.get $~lib/rt/itcms/toSpace
+      i32.ne
+      if
+       local.get $obj
+       call $~lib/rt/itcms/Object#get:color
+       local.get $black
+       i32.ne
+       if
+        local.get $obj
+        local.get $black
+        call $~lib/rt/itcms/Object#set:color
+        local.get $obj
+        i32.const 20
+        i32.add
+        i32.const 0
+        call $~lib/rt/__visit_members
+       end
+       local.get $obj
+       call $~lib/rt/itcms/Object#get:next
+       local.set $obj
+       br $while-continue|2
+      end
+     end
+     global.get $~lib/rt/itcms/fromSpace
+     local.set $from
+     global.get $~lib/rt/itcms/toSpace
+     global.set $~lib/rt/itcms/fromSpace
+     local.get $from
+     global.set $~lib/rt/itcms/toSpace
+     local.get $black
+     global.set $~lib/rt/itcms/white
+     local.get $from
+     call $~lib/rt/itcms/Object#get:next
+     global.set $~lib/rt/itcms/iter
+     i32.const 2
+     global.set $~lib/rt/itcms/state
+    end
+    global.get $~lib/rt/itcms/visitCount
+    i32.const 1
+    i32.mul
+    return
+   end
+   global.get $~lib/rt/itcms/iter
+   local.set $obj
+   local.get $obj
+   global.get $~lib/rt/itcms/toSpace
+   i32.ne
+   if
+    local.get $obj
+    call $~lib/rt/itcms/Object#get:next
+    global.set $~lib/rt/itcms/iter
+    i32.const 1
+    drop
+    local.get $obj
+    call $~lib/rt/itcms/Object#get:color
+    global.get $~lib/rt/itcms/white
+    i32.eqz
+    i32.eq
+    i32.eqz
+    if
+     i32.const 0
+     i32.const 272
+     i32.const 229
+     i32.const 20
+     call $~lib/builtins/abort
+     unreachable
+    end
+    local.get $obj
+    call $~lib/rt/itcms/free
+    i32.const 10
+    return
+   end
+   global.get $~lib/rt/itcms/toSpace
+   global.get $~lib/rt/itcms/toSpace
+   call $~lib/rt/itcms/Object#set:nextWithColor
+   global.get $~lib/rt/itcms/toSpace
+   global.get $~lib/rt/itcms/toSpace
+   call $~lib/rt/itcms/Object#set:prev
+   i32.const 0
+   global.set $~lib/rt/itcms/state
+   br $break|0
+  end
+  i32.const 0
+  return
+ )
+ (func $~lib/rt/itcms/interrupt
+  (local $budget i32)
+  i32.const 0
+  drop
+  i32.const 0
+  drop
+  i32.const 1024
+  i32.const 200
+  i32.mul
+  i32.const 100
+  i32.div_u
+  local.set $budget
+  loop $do-loop|0
+   local.get $budget
+   call $~lib/rt/itcms/step
+   i32.sub
+   local.set $budget
+   global.get $~lib/rt/itcms/state
+   i32.const 0
+   i32.eq
+   if
+    i32.const 0
+    drop
+    global.get $~lib/rt/itcms/total
+    i64.extend_i32_u
+    i32.const 200
+    i64.extend_i32_u
+    i64.mul
+    i64.const 100
+    i64.div_u
+    i32.wrap_i64
+    i32.const 1024
+    i32.add
+    global.set $~lib/rt/itcms/threshold
+    i32.const 0
+    drop
+    return
+   end
+   local.get $budget
+   i32.const 0
+   i32.gt_s
+   br_if $do-loop|0
+  end
+  i32.const 0
+  drop
+  global.get $~lib/rt/itcms/total
+  i32.const 1024
+  global.get $~lib/rt/itcms/total
+  global.get $~lib/rt/itcms/threshold
+  i32.sub
+  i32.const 1024
+  i32.lt_u
+  i32.mul
+  i32.add
+  global.set $~lib/rt/itcms/threshold
+  i32.const 0
+  drop
+ )
+ (func $~lib/rt/tlsf/computeSize (param $size i32) (result i32)
+  local.get $size
+  i32.const 12
+  i32.le_u
+  if (result i32)
+   i32.const 12
+  else
+   local.get $size
+   i32.const 4
+   i32.add
+   i32.const 15
+   i32.add
+   i32.const 15
+   i32.const -1
+   i32.xor
+   i32.and
+   i32.const 4
+   i32.sub
+  end
+  return
+ )
+ (func $~lib/rt/tlsf/prepareSize (param $size i32) (result i32)
+  local.get $size
+  i32.const 1073741820
+  i32.gt_u
+  if
+   i32.const 208
+   i32.const 544
+   i32.const 462
+   i32.const 29
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $size
+  call $~lib/rt/tlsf/computeSize
+  return
+ )
+ (func $~lib/rt/tlsf/roundSize (param $size i32) (result i32)
+  local.get $size
+  i32.const 536870910
+  i32.lt_u
+  if (result i32)
+   local.get $size
+   i32.const 1
+   i32.const 27
+   local.get $size
+   i32.clz
+   i32.sub
+   i32.shl
+   i32.add
+   i32.const 1
+   i32.sub
+  else
+   local.get $size
+  end
+  return
+ )
+ (func $~lib/rt/tlsf/searchBlock (param $root i32) (param $size i32) (result i32)
+  (local $fl i32)
+  (local $sl i32)
+  (local $requestSize i32)
+  (local $root|5 i32)
+  (local $fl|6 i32)
+  (local $slMap i32)
+  (local $head i32)
+  (local $flMap i32)
+  (local $root|10 i32)
+  (local $fl|11 i32)
+  (local $root|12 i32)
+  (local $fl|13 i32)
+  (local $sl|14 i32)
+  (local $root|15 i32)
+  (local $fl|16 i32)
+  (local $sl|17 i32)
+  local.get $size
+  i32.const 256
+  i32.lt_u
+  if
+   i32.const 0
+   local.set $fl
+   local.get $size
+   i32.const 4
+   i32.shr_u
+   local.set $sl
+  else
+   local.get $size
+   call $~lib/rt/tlsf/roundSize
+   local.set $requestSize
+   i32.const 4
+   i32.const 8
+   i32.mul
+   i32.const 1
+   i32.sub
+   local.get $requestSize
+   i32.clz
+   i32.sub
+   local.set $fl
+   local.get $requestSize
+   local.get $fl
+   i32.const 4
+   i32.sub
+   i32.shr_u
+   i32.const 1
+   i32.const 4
+   i32.shl
+   i32.xor
+   local.set $sl
+   local.get $fl
+   i32.const 8
+   i32.const 1
+   i32.sub
+   i32.sub
+   local.set $fl
+  end
+  i32.const 1
+  drop
+  local.get $fl
+  i32.const 23
+  i32.lt_u
+  if (result i32)
+   local.get $sl
+   i32.const 16
+   i32.lt_u
+  else
+   i32.const 0
+  end
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 334
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  block $~lib/rt/tlsf/GETSL|inlined.2 (result i32)
+   local.get $root
+   local.set $root|5
+   local.get $fl
+   local.set $fl|6
+   local.get $root|5
+   local.get $fl|6
+   i32.const 2
+   i32.shl
+   i32.add
+   i32.load $0 offset=4
+   br $~lib/rt/tlsf/GETSL|inlined.2
+  end
+  i32.const 0
+  i32.const -1
+  i32.xor
+  local.get $sl
+  i32.shl
+  i32.and
+  local.set $slMap
+  i32.const 0
+  local.set $head
+  local.get $slMap
+  i32.eqz
+  if
+   local.get $root
+   call $~lib/rt/tlsf/Root#get:flMap
+   i32.const 0
+   i32.const -1
+   i32.xor
+   local.get $fl
+   i32.const 1
+   i32.add
+   i32.shl
+   i32.and
+   local.set $flMap
+   local.get $flMap
+   i32.eqz
+   if
+    i32.const 0
+    local.set $head
+   else
+    local.get $flMap
+    i32.ctz
+    local.set $fl
+    block $~lib/rt/tlsf/GETSL|inlined.3 (result i32)
+     local.get $root
+     local.set $root|10
+     local.get $fl
+     local.set $fl|11
+     local.get $root|10
+     local.get $fl|11
+     i32.const 2
+     i32.shl
+     i32.add
+     i32.load $0 offset=4
+     br $~lib/rt/tlsf/GETSL|inlined.3
+    end
+    local.set $slMap
+    i32.const 1
+    drop
+    local.get $slMap
+    i32.eqz
+    if
+     i32.const 0
+     i32.const 544
+     i32.const 347
+     i32.const 18
+     call $~lib/builtins/abort
+     unreachable
+    end
+    block $~lib/rt/tlsf/GETHEAD|inlined.2 (result i32)
+     local.get $root
+     local.set $root|12
+     local.get $fl
+     local.set $fl|13
+     local.get $slMap
+     i32.ctz
+     local.set $sl|14
+     local.get $root|12
+     local.get $fl|13
+     i32.const 4
+     i32.shl
+     local.get $sl|14
+     i32.add
+     i32.const 2
+     i32.shl
+     i32.add
+     i32.load $0 offset=96
+     br $~lib/rt/tlsf/GETHEAD|inlined.2
+    end
+    local.set $head
+   end
+  else
+   block $~lib/rt/tlsf/GETHEAD|inlined.3 (result i32)
+    local.get $root
+    local.set $root|15
+    local.get $fl
+    local.set $fl|16
+    local.get $slMap
+    i32.ctz
+    local.set $sl|17
+    local.get $root|15
+    local.get $fl|16
+    i32.const 4
+    i32.shl
+    local.get $sl|17
+    i32.add
+    i32.const 2
+    i32.shl
+    i32.add
+    i32.load $0 offset=96
+    br $~lib/rt/tlsf/GETHEAD|inlined.3
+   end
+   local.set $head
+  end
+  local.get $head
+  return
+ )
+ (func $~lib/rt/tlsf/growMemory (param $root i32) (param $size i32)
+  (local $pagesBefore i32)
+  (local $root|3 i32)
+  (local $pagesNeeded i32)
+  (local $5 i32)
+  (local $6 i32)
+  (local $pagesWanted i32)
+  (local $pagesAfter i32)
+  i32.const 0
+  drop
+  local.get $size
+  i32.const 256
+  i32.ge_u
+  if
+   local.get $size
+   call $~lib/rt/tlsf/roundSize
+   local.set $size
+  end
+  memory.size $0
+  local.set $pagesBefore
+  local.get $size
+  i32.const 4
+  local.get $pagesBefore
+  i32.const 16
+  i32.shl
+  i32.const 4
+  i32.sub
+  block $~lib/rt/tlsf/GETTAIL|inlined.1 (result i32)
+   local.get $root
+   local.set $root|3
+   local.get $root|3
+   i32.load $0 offset=1568
+   br $~lib/rt/tlsf/GETTAIL|inlined.1
+  end
+  i32.ne
+  i32.shl
+  i32.add
+  local.set $size
+  local.get $size
+  i32.const 65535
+  i32.add
+  i32.const 65535
+  i32.const -1
+  i32.xor
+  i32.and
+  i32.const 16
+  i32.shr_u
+  local.set $pagesNeeded
+  local.get $pagesBefore
+  local.tee $5
+  local.get $pagesNeeded
+  local.tee $6
+  local.get $5
+  local.get $6
+  i32.gt_s
+  select
+  local.set $pagesWanted
+  local.get $pagesWanted
+  memory.grow $0
+  i32.const 0
+  i32.lt_s
+  if
+   local.get $pagesNeeded
+   memory.grow $0
+   i32.const 0
+   i32.lt_s
+   if
+    unreachable
+   end
+  end
+  i32.const 1
+  drop
+  call $rt/grow-handler/handler
+  memory.size $0
+  local.set $pagesAfter
+  local.get $root
+  local.get $pagesBefore
+  i32.const 16
+  i32.shl
+  local.get $pagesAfter
+  i64.extend_i32_s
+  i64.const 16
+  i64.shl
+  call $~lib/rt/tlsf/addMemory
+  drop
+ )
+ (func $~lib/rt/tlsf/prepareBlock (param $root i32) (param $block i32) (param $size i32)
+  (local $blockInfo i32)
+  (local $remaining i32)
+  (local $spare i32)
+  (local $block|6 i32)
+  (local $block|7 i32)
+  local.get $block
+  call $~lib/rt/common/BLOCK#get:mmInfo
+  local.set $blockInfo
+  i32.const 1
+  drop
+  local.get $size
+  i32.const 4
+  i32.add
+  i32.const 15
+  i32.and
+  i32.eqz
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 361
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $blockInfo
+  i32.const 3
+  i32.const -1
+  i32.xor
+  i32.and
+  local.get $size
+  i32.sub
+  local.set $remaining
+  local.get $remaining
+  i32.const 4
+  i32.const 12
+  i32.add
+  i32.ge_u
+  if
+   local.get $block
+   local.get $size
+   local.get $blockInfo
+   i32.const 2
+   i32.and
+   i32.or
+   call $~lib/rt/common/BLOCK#set:mmInfo
+   local.get $block
+   i32.const 4
+   i32.add
+   local.get $size
+   i32.add
+   local.set $spare
+   local.get $spare
+   local.get $remaining
+   i32.const 4
+   i32.sub
+   i32.const 1
+   i32.or
+   call $~lib/rt/common/BLOCK#set:mmInfo
+   local.get $root
+   local.get $spare
+   call $~lib/rt/tlsf/insertBlock
+  else
+   local.get $block
+   local.get $blockInfo
+   i32.const 1
+   i32.const -1
+   i32.xor
+   i32.and
+   call $~lib/rt/common/BLOCK#set:mmInfo
+   block $~lib/rt/tlsf/GETRIGHT|inlined.3 (result i32)
+    local.get $block
+    local.set $block|7
+    local.get $block|7
+    i32.const 4
+    i32.add
+    local.get $block|7
+    call $~lib/rt/common/BLOCK#get:mmInfo
+    i32.const 3
+    i32.const -1
+    i32.xor
+    i32.and
+    i32.add
+    br $~lib/rt/tlsf/GETRIGHT|inlined.3
+   end
+   block $~lib/rt/tlsf/GETRIGHT|inlined.2 (result i32)
+    local.get $block
+    local.set $block|6
+    local.get $block|6
+    i32.const 4
+    i32.add
+    local.get $block|6
+    call $~lib/rt/common/BLOCK#get:mmInfo
+    i32.const 3
+    i32.const -1
+    i32.xor
+    i32.and
+    i32.add
+    br $~lib/rt/tlsf/GETRIGHT|inlined.2
+   end
+   call $~lib/rt/common/BLOCK#get:mmInfo
+   i32.const 2
+   i32.const -1
+   i32.xor
+   i32.and
+   call $~lib/rt/common/BLOCK#set:mmInfo
+  end
+ )
+ (func $~lib/rt/tlsf/allocateBlock (param $root i32) (param $size i32) (result i32)
+  (local $payloadSize i32)
+  (local $block i32)
+  local.get $size
+  call $~lib/rt/tlsf/prepareSize
+  local.set $payloadSize
+  local.get $root
+  local.get $payloadSize
+  call $~lib/rt/tlsf/searchBlock
+  local.set $block
+  local.get $block
+  i32.eqz
+  if
+   local.get $root
+   local.get $payloadSize
+   call $~lib/rt/tlsf/growMemory
+   local.get $root
+   local.get $payloadSize
+   call $~lib/rt/tlsf/searchBlock
+   local.set $block
+   i32.const 1
+   drop
+   local.get $block
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 544
+    i32.const 503
+    i32.const 16
+    call $~lib/builtins/abort
+    unreachable
+   end
+  end
+  i32.const 1
+  drop
+  local.get $block
+  call $~lib/rt/common/BLOCK#get:mmInfo
+  i32.const 3
+  i32.const -1
+  i32.xor
+  i32.and
+  local.get $payloadSize
+  i32.ge_u
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 544
+   i32.const 505
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $root
+  local.get $block
+  call $~lib/rt/tlsf/removeBlock
+  local.get $root
+  local.get $block
+  local.get $payloadSize
+  call $~lib/rt/tlsf/prepareBlock
+  i32.const 0
+  drop
+  local.get $block
+  return
+ )
+ (func $~lib/rt/tlsf/__alloc (param $size i32) (result i32)
+  global.get $~lib/rt/tlsf/ROOT
+  i32.eqz
+  if
+   call $~lib/rt/tlsf/initialize
+  end
+  global.get $~lib/rt/tlsf/ROOT
+  local.get $size
+  call $~lib/rt/tlsf/allocateBlock
+  i32.const 4
+  i32.add
+  return
+ )
+ (func $~lib/rt/itcms/Object#set:rtId (param $this i32) (param $rtId i32)
+  local.get $this
+  local.get $rtId
+  i32.store $0 offset=12
+ )
+ (func $~lib/rt/itcms/__new (param $size i32) (param $id i32) (result i32)
+  (local $obj i32)
+  (local $ptr i32)
+  local.get $size
+  i32.const 1073741804
+  i32.ge_u
+  if
+   i32.const 208
+   i32.const 272
+   i32.const 261
+   i32.const 31
+   call $~lib/builtins/abort
+   unreachable
+  end
+  global.get $~lib/rt/itcms/total
+  global.get $~lib/rt/itcms/threshold
+  i32.ge_u
+  if
+   call $~lib/rt/itcms/interrupt
+  end
+  i32.const 16
+  local.get $size
+  i32.add
+  call $~lib/rt/tlsf/__alloc
+  i32.const 4
+  i32.sub
+  local.set $obj
+  local.get $obj
+  local.get $id
+  call $~lib/rt/itcms/Object#set:rtId
+  local.get $obj
+  local.get $size
+  call $~lib/rt/itcms/Object#set:rtSize
+  local.get $obj
+  global.get $~lib/rt/itcms/fromSpace
+  global.get $~lib/rt/itcms/white
+  call $~lib/rt/itcms/Object#linkTo
+  global.get $~lib/rt/itcms/total
+  local.get $obj
+  call $~lib/rt/itcms/Object#get:size
+  i32.add
+  global.set $~lib/rt/itcms/total
+  local.get $obj
+  i32.const 20
+  i32.add
+  local.set $ptr
+  local.get $ptr
+  i32.const 0
+  local.get $size
+  memory.fill $0
+  local.get $ptr
+  return
+ )
+ (func $~lib/rt/itcms/Object#get:rtSize (param $this i32) (result i32)
+  local.get $this
+  i32.load $0 offset=16
+ )
+ (func $~lib/rt/itcms/__renew (param $oldPtr i32) (param $size i32) (result i32)
+  (local $oldObj i32)
+  (local $newPtr i32)
+  (local $4 i32)
+  (local $5 i32)
+  local.get $oldPtr
+  i32.const 20
+  i32.sub
+  local.set $oldObj
+  local.get $size
+  local.get $oldObj
+  call $~lib/rt/common/BLOCK#get:mmInfo
+  i32.const 3
+  i32.const -1
+  i32.xor
+  i32.and
+  i32.const 16
+  i32.sub
+  i32.le_u
+  if
+   local.get $oldObj
+   local.get $size
+   call $~lib/rt/itcms/Object#set:rtSize
+   local.get $oldPtr
+   return
+  end
+  local.get $size
+  local.get $oldObj
+  call $~lib/rt/itcms/Object#get:rtId
+  call $~lib/rt/itcms/__new
+  local.set $newPtr
+  local.get $newPtr
+  local.get $oldPtr
+  local.get $size
+  local.tee $4
+  local.get $oldObj
+  call $~lib/rt/itcms/Object#get:rtSize
+  local.tee $5
+  local.get $4
+  local.get $5
+  i32.lt_u
+  select
+  memory.copy $0 $0
+  local.get $newPtr
+  return
+ )
+ (func $~lib/rt/itcms/__link (param $parentPtr i32) (param $childPtr i32) (param $expectMultiple i32)
+  (local $child i32)
+  (local $parent i32)
+  (local $parentColor i32)
+  local.get $childPtr
+  i32.eqz
+  if
+   return
+  end
+  i32.const 1
+  drop
+  local.get $parentPtr
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 272
+   i32.const 295
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $childPtr
+  i32.const 20
+  i32.sub
+  local.set $child
+  local.get $child
+  call $~lib/rt/itcms/Object#get:color
+  global.get $~lib/rt/itcms/white
+  i32.eq
+  if
+   local.get $parentPtr
+   i32.const 20
+   i32.sub
+   local.set $parent
+   local.get $parent
+   call $~lib/rt/itcms/Object#get:color
+   local.set $parentColor
+   local.get $parentColor
+   global.get $~lib/rt/itcms/white
+   i32.eqz
+   i32.eq
+   if
+    local.get $expectMultiple
+    if
+     local.get $parent
+     call $~lib/rt/itcms/Object#makeGray
+    else
+     local.get $child
+     call $~lib/rt/itcms/Object#makeGray
+    end
+   else
+    local.get $parentColor
+    i32.const 3
+    i32.eq
+    if (result i32)
+     global.get $~lib/rt/itcms/state
+     i32.const 1
+     i32.eq
+    else
+     i32.const 0
+    end
+    if
+     local.get $child
+     call $~lib/rt/itcms/Object#makeGray
+    end
+   end
+  end
+ )
+ (func $~lib/array/Array<i32>#get:dataStart (param $this i32) (result i32)
+  local.get $this
+  i32.load $0 offset=4
+ )
+ (func $~lib/array/Array<i32>#set:length_ (param $this i32) (param $length_ i32)
+  local.get $this
+  local.get $length_
+  i32.store $0 offset=12
+ )
+ (func $~lib/rt/__visit_globals (param $0 i32)
+  (local $1 i32)
+  global.get $rt/grow-handler/leak
+  local.tee $1
+  if
+   local.get $1
+   local.get $0
+   call $~lib/rt/itcms/__visit
+  end
+  i32.const 400
+  local.get $0
+  call $~lib/rt/itcms/__visit
+  i32.const 112
+  local.get $0
+  call $~lib/rt/itcms/__visit
+  i32.const 208
+  local.get $0
+  call $~lib/rt/itcms/__visit
+ )
+ (func $~lib/arraybuffer/ArrayBufferView~visit (param $0 i32) (param $1 i32)
+  (local $2 i32)
+  local.get $0
+  local.get $1
+  call $~lib/object/Object~visit
+  local.get $0
+  i32.load $0
+  local.tee $2
+  if
+   local.get $2
+   local.get $1
+   call $~lib/rt/itcms/__visit
+  end
+ )
+ (func $~lib/object/Object~visit (param $0 i32) (param $1 i32)
+  nop
+ )
+ (func $~lib/array/Array<i32>#get:buffer (param $this i32) (result i32)
+  local.get $this
+  i32.load $0
+ )
+ (func $~lib/array/Array<i32>~visit (param $0 i32) (param $1 i32)
+  local.get $0
+  local.get $1
+  call $~lib/object/Object~visit
+  local.get $0
+  local.get $1
+  call $~lib/array/Array<i32>#__visit
+ )
+ (func $~lib/rt/__visit_members (param $0 i32) (param $1 i32)
+  block $invalid
+   block $~lib/array/Array<i32>
+    block $~lib/arraybuffer/ArrayBufferView
+     block $~lib/string/String
+      block $~lib/arraybuffer/ArrayBuffer
+       block $~lib/object/Object
+        local.get $0
+        i32.const 8
+        i32.sub
+        i32.load $0
+        br_table $~lib/object/Object $~lib/arraybuffer/ArrayBuffer $~lib/string/String $~lib/arraybuffer/ArrayBufferView $~lib/array/Array<i32> $invalid
+       end
+       return
+      end
+      return
+     end
+     return
+    end
+    local.get $0
+    local.get $1
+    call $~lib/arraybuffer/ArrayBufferView~visit
+    return
+   end
+   local.get $0
+   local.get $1
+   call $~lib/array/Array<i32>~visit
+   return
+  end
+  unreachable
+ )
+ (func $~start
+  memory.size $0
+  i32.const 16
+  i32.shl
+  global.get $~lib/memory/__heap_base
+  i32.sub
+  i32.const 1
+  i32.shr_u
+  global.set $~lib/rt/itcms/threshold
+  i32.const 320
+  call $~lib/rt/itcms/initLazy
+  global.set $~lib/rt/itcms/pinSpace
+  i32.const 352
+  call $~lib/rt/itcms/initLazy
+  global.set $~lib/rt/itcms/toSpace
+  i32.const 496
+  call $~lib/rt/itcms/initLazy
+  global.set $~lib/rt/itcms/fromSpace
+ )
+ (func $~stack_check
+  global.get $~lib/memory/__stack_pointer
+  global.get $~lib/memory/__data_end
+  i32.lt_s
+  if
+   i32.const 33408
+   i32.const 33456
+   i32.const 1
+   i32.const 1
+   call $~lib/builtins/abort
+   unreachable
+  end
+ )
+ (func $~lib/array/ensureCapacity (param $array i32) (param $newSize i32) (param $alignLog2 i32) (param $canGrow i32)
+  (local $oldCapacity i32)
+  (local $oldData i32)
+  (local $6 i32)
+  (local $7 i32)
+  (local $newCapacity i32)
+  (local $9 i32)
+  (local $10 i32)
+  (local $11 i32)
+  (local $12 i32)
+  (local $newData i32)
+  (local $14 i32)
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.sub
+  global.set $~lib/memory/__stack_pointer
+  call $~stack_check
+  global.get $~lib/memory/__stack_pointer
+  i32.const 0
+  i32.store $0
+  local.get $array
+  local.set $14
+  global.get $~lib/memory/__stack_pointer
+  local.get $14
+  i32.store $0
+  local.get $14
+  call $~lib/arraybuffer/ArrayBufferView#get:byteLength
+  local.set $oldCapacity
+  local.get $newSize
+  local.get $oldCapacity
+  local.get $alignLog2
+  i32.shr_u
+  i32.gt_u
+  if
+   local.get $newSize
+   i32.const 1073741820
+   local.get $alignLog2
+   i32.shr_u
+   i32.gt_u
+   if
+    i32.const 112
+    i32.const 160
+    i32.const 19
+    i32.const 48
+    call $~lib/builtins/abort
+    unreachable
+   end
+   local.get $array
+   local.set $14
+   global.get $~lib/memory/__stack_pointer
+   local.get $14
+   i32.store $0
+   local.get $14
+   call $~lib/arraybuffer/ArrayBufferView#get:buffer
+   local.set $oldData
+   local.get $newSize
+   local.tee $6
+   i32.const 8
+   local.tee $7
+   local.get $6
+   local.get $7
+   i32.gt_u
+   select
+   local.get $alignLog2
+   i32.shl
+   local.set $newCapacity
+   local.get $canGrow
+   if
+    local.get $oldCapacity
+    i32.const 1
+    i32.shl
+    local.tee $9
+    i32.const 1073741820
+    local.tee $10
+    local.get $9
+    local.get $10
+    i32.lt_u
+    select
+    local.tee $11
+    local.get $newCapacity
+    local.tee $12
+    local.get $11
+    local.get $12
+    i32.gt_u
+    select
+    local.set $newCapacity
+   end
+   local.get $oldData
+   local.get $newCapacity
+   call $~lib/rt/itcms/__renew
+   local.set $newData
+   i32.const 2
+   global.get $~lib/shared/runtime/Runtime.Incremental
+   i32.ne
+   drop
+   local.get $newData
+   local.get $oldData
+   i32.ne
+   if
+    local.get $array
+    local.get $newData
+    i32.store $0
+    local.get $array
+    local.get $newData
+    i32.store $0 offset=4
+    local.get $array
+    local.get $newData
+    i32.const 0
+    call $~lib/rt/itcms/__link
+   end
+   local.get $array
+   local.get $newCapacity
+   i32.store $0 offset=8
+  end
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.add
+  global.set $~lib/memory/__stack_pointer
+ )
+ (func $~lib/array/Array<i32>#push (param $this i32) (param $value i32) (result i32)
+  (local $oldLen i32)
+  (local $len i32)
+  (local $4 i32)
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.sub
+  global.set $~lib/memory/__stack_pointer
+  call $~stack_check
+  global.get $~lib/memory/__stack_pointer
+  i32.const 0
+  i32.store $0
+  local.get $this
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0
+  local.get $4
+  call $~lib/array/Array<i32>#get:length_
+  local.set $oldLen
+  local.get $oldLen
+  i32.const 1
+  i32.add
+  local.set $len
+  local.get $this
+  local.get $len
+  i32.const 2
+  i32.const 1
+  call $~lib/array/ensureCapacity
+  i32.const 0
+  drop
+  local.get $this
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0
+  local.get $4
+  call $~lib/array/Array<i32>#get:dataStart
+  local.get $oldLen
+  i32.const 2
+  i32.shl
+  i32.add
+  local.get $value
+  i32.store $0
+  local.get $this
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  local.get $4
+  i32.store $0
+  local.get $4
+  local.get $len
+  call $~lib/array/Array<i32>#set:length_
+  local.get $len
+  local.set $4
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.add
+  global.set $~lib/memory/__stack_pointer
+  local.get $4
+  return
+ )
+ (func $rt/grow-handler/stress
+  (local $i i32)
+  (local $1 i32)
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.sub
+  global.set $~lib/memory/__stack_pointer
+  call $~stack_check
+  global.get $~lib/memory/__stack_pointer
+  i32.const 0
+  i32.store $0
+  i32.const 0
+  local.set $i
+  loop $for-loop|0
+   local.get $i
+   i32.const 65536
+   i32.lt_s
+   if
+    global.get $rt/grow-handler/leak
+    local.set $1
+    global.get $~lib/memory/__stack_pointer
+    local.get $1
+    i32.store $0
+    local.get $1
+    local.get $i
+    call $~lib/array/Array<i32>#push
+    drop
+    local.get $i
+    i32.const 1
+    i32.add
+    local.set $i
+    br $for-loop|0
+   end
+  end
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.add
+  global.set $~lib/memory/__stack_pointer
+ )
+ (func $~lib/array/Array<i32>#__visit (param $this i32) (param $cookie i32)
+  (local $2 i32)
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.sub
+  global.set $~lib/memory/__stack_pointer
+  call $~stack_check
+  global.get $~lib/memory/__stack_pointer
+  i32.const 0
+  i32.store $0
+  i32.const 0
+  drop
+  local.get $this
+  local.set $2
+  global.get $~lib/memory/__stack_pointer
+  local.get $2
+  i32.store $0
+  local.get $2
+  call $~lib/array/Array<i32>#get:buffer
+  local.get $cookie
+  call $~lib/rt/itcms/__visit
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.add
+  global.set $~lib/memory/__stack_pointer
+ )
+)
diff --git a/tests/compiler/rt/grow-handler.js b/tests/compiler/rt/grow-handler.js
new file mode 100644
index 0000000000..11668221b1
--- /dev/null
+++ b/tests/compiler/rt/grow-handler.js
@@ -0,0 +1,12 @@
+let growCount = 0;
+
+export function preInstantiate(imports) {
+  imports.grow = {
+    handler() { growCount++; }
+  };
+}
+
+export function postInstantiate({exports}) {
+  exports.stress();
+  if (!growCount) throw new Error("did not detect growth on large allocation");
+}
\ No newline at end of file
diff --git a/tests/compiler/rt/grow-handler.json b/tests/compiler/rt/grow-handler.json
new file mode 100644
index 0000000000..3675c01e3c
--- /dev/null
+++ b/tests/compiler/rt/grow-handler.json
@@ -0,0 +1,5 @@
+{
+    "asc_flags": [
+        "-u", "ASC_RT_GROW_HANDLER=rt/grow-handler/handler"
+    ]
+}
\ No newline at end of file
diff --git a/tests/compiler/rt/grow-handler.release.wat b/tests/compiler/rt/grow-handler.release.wat
new file mode 100644
index 0000000000..d5b6104229
--- /dev/null
+++ b/tests/compiler/rt/grow-handler.release.wat
@@ -0,0 +1,1896 @@
+(module
+ (type $none_=>_none (func))
+ (type $i32_=>_none (func (param i32)))
+ (type $i32_i32_=>_none (func (param i32 i32)))
+ (type $i32_i32_i32_i32_=>_none (func (param i32 i32 i32 i32)))
+ (type $i32_i32_i64_=>_none (func (param i32 i32 i64)))
+ (type $none_=>_i32 (func (result i32)))
+ (type $i32_i32_=>_i32 (func (param i32 i32) (result i32)))
+ (import "env" "abort" (func $~lib/builtins/abort (param i32 i32 i32 i32)))
+ (import "grow" "handler" (func $rt/grow-handler/handler))
+ (global $~lib/rt/itcms/total (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/threshold (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/state (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/visitCount (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/pinSpace (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/iter (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/toSpace (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/white (mut i32) (i32.const 0))
+ (global $~lib/rt/itcms/fromSpace (mut i32) (i32.const 0))
+ (global $~lib/rt/tlsf/ROOT (mut i32) (i32.const 0))
+ (global $~lib/memory/__stack_pointer (mut i32) (i32.const 34408))
+ (memory $0 1)
+ (data $0 (i32.const 1036) "\1c")
+ (data $0.1 (i32.const 1048) "\01")
+ (data $1 (i32.const 1068) ",")
+ (data $1.1 (i32.const 1080) "\04\00\00\00\10\00\00\00 \04\00\00 \04")
+ (data $2 (i32.const 1116) ",")
+ (data $2.1 (i32.const 1128) "\02\00\00\00\1c\00\00\00I\00n\00v\00a\00l\00i\00d\00 \00l\00e\00n\00g\00t\00h")
+ (data $3 (i32.const 1164) ",")
+ (data $3.1 (i32.const 1176) "\02\00\00\00\1a\00\00\00~\00l\00i\00b\00/\00a\00r\00r\00a\00y\00.\00t\00s")
+ (data $4 (i32.const 1212) "<")
+ (data $4.1 (i32.const 1224) "\02\00\00\00(\00\00\00A\00l\00l\00o\00c\00a\00t\00i\00o\00n\00 \00t\00o\00o\00 \00l\00a\00r\00g\00e")
+ (data $5 (i32.const 1276) "<")
+ (data $5.1 (i32.const 1288) "\02\00\00\00 \00\00\00~\00l\00i\00b\00/\00r\00t\00/\00i\00t\00c\00m\00s\00.\00t\00s")
+ (data $8 (i32.const 1404) "<")
+ (data $8.1 (i32.const 1416) "\02\00\00\00$\00\00\00I\00n\00d\00e\00x\00 \00o\00u\00t\00 \00o\00f\00 \00r\00a\00n\00g\00e")
+ (data $9 (i32.const 1468) ",")
+ (data $9.1 (i32.const 1480) "\02\00\00\00\14\00\00\00~\00l\00i\00b\00/\00r\00t\00.\00t\00s")
+ (data $11 (i32.const 1548) "<")
+ (data $11.1 (i32.const 1560) "\02\00\00\00\1e\00\00\00~\00l\00i\00b\00/\00r\00t\00/\00t\00l\00s\00f\00.\00t\00s")
+ (data $12 (i32.const 1616) "\05\00\00\00 \00\00\00 \00\00\00 \00\00\00\00\00\00\00\02\t")
+ (export "stress" (func $rt/grow-handler/stress))
+ (export "memory" (memory $0))
+ (start $~start)
+ (func $~lib/rt/itcms/visitRoots
+  (local $0 i32)
+  (local $1 i32)
+  i32.const 1088
+  call $byn-split-outlined-A$~lib/rt/itcms/__visit
+  i32.const 1424
+  call $byn-split-outlined-A$~lib/rt/itcms/__visit
+  i32.const 1136
+  call $byn-split-outlined-A$~lib/rt/itcms/__visit
+  i32.const 1232
+  call $byn-split-outlined-A$~lib/rt/itcms/__visit
+  global.get $~lib/rt/itcms/pinSpace
+  local.tee $1
+  i32.load $0 offset=4
+  i32.const -4
+  i32.and
+  local.set $0
+  loop $while-continue|0
+   local.get $0
+   local.get $1
+   i32.ne
+   if
+    local.get $0
+    i32.load $0 offset=4
+    i32.const 3
+    i32.and
+    i32.const 3
+    i32.ne
+    if
+     i32.const 0
+     i32.const 1296
+     i32.const 160
+     i32.const 16
+     call $~lib/builtins/abort
+     unreachable
+    end
+    local.get $0
+    i32.const 20
+    i32.add
+    call $~lib/rt/__visit_members
+    local.get $0
+    i32.load $0 offset=4
+    i32.const -4
+    i32.and
+    local.set $0
+    br $while-continue|0
+   end
+  end
+ )
+ (func $~lib/rt/itcms/Object#makeGray (param $0 i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  local.get $0
+  global.get $~lib/rt/itcms/iter
+  i32.eq
+  if
+   local.get $0
+   i32.load $0 offset=8
+   local.tee $1
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 1296
+    i32.const 148
+    i32.const 30
+    call $~lib/builtins/abort
+    unreachable
+   end
+   local.get $1
+   global.set $~lib/rt/itcms/iter
+  end
+  block $__inlined_func$~lib/rt/itcms/Object#unlink
+   local.get $0
+   i32.load $0 offset=4
+   i32.const -4
+   i32.and
+   local.tee $1
+   i32.eqz
+   if
+    local.get $0
+    i32.load $0 offset=8
+    i32.eqz
+    local.get $0
+    i32.const 34408
+    i32.lt_u
+    i32.and
+    i32.eqz
+    if
+     i32.const 0
+     i32.const 1296
+     i32.const 128
+     i32.const 18
+     call $~lib/builtins/abort
+     unreachable
+    end
+    br $__inlined_func$~lib/rt/itcms/Object#unlink
+   end
+   local.get $0
+   i32.load $0 offset=8
+   local.tee $2
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 1296
+    i32.const 132
+    i32.const 16
+    call $~lib/builtins/abort
+    unreachable
+   end
+   local.get $1
+   local.get $2
+   i32.store $0 offset=8
+   local.get $2
+   local.get $1
+   local.get $2
+   i32.load $0 offset=4
+   i32.const 3
+   i32.and
+   i32.or
+   i32.store $0 offset=4
+  end
+  global.get $~lib/rt/itcms/toSpace
+  local.set $2
+  local.get $0
+  i32.load $0 offset=12
+  local.tee $1
+  i32.const 2
+  i32.le_u
+  if (result i32)
+   i32.const 1
+  else
+   local.get $1
+   i32.const 1616
+   i32.load $0
+   i32.gt_u
+   if
+    i32.const 1424
+    i32.const 1488
+    i32.const 21
+    i32.const 28
+    call $~lib/builtins/abort
+    unreachable
+   end
+   local.get $1
+   i32.const 2
+   i32.shl
+   i32.const 1620
+   i32.add
+   i32.load $0
+   i32.const 32
+   i32.and
+  end
+  local.set $3
+  local.get $2
+  i32.load $0 offset=8
+  local.set $1
+  local.get $0
+  global.get $~lib/rt/itcms/white
+  i32.eqz
+  i32.const 2
+  local.get $3
+  select
+  local.get $2
+  i32.or
+  i32.store $0 offset=4
+  local.get $0
+  local.get $1
+  i32.store $0 offset=8
+  local.get $1
+  local.get $0
+  local.get $1
+  i32.load $0 offset=4
+  i32.const 3
+  i32.and
+  i32.or
+  i32.store $0 offset=4
+  local.get $2
+  local.get $0
+  i32.store $0 offset=8
+ )
+ (func $~lib/rt/tlsf/removeBlock (param $0 i32) (param $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  local.get $1
+  i32.load $0
+  local.tee $2
+  i32.const 1
+  i32.and
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 1568
+   i32.const 268
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $2
+  i32.const -4
+  i32.and
+  local.tee $2
+  i32.const 12
+  i32.lt_u
+  if
+   i32.const 0
+   i32.const 1568
+   i32.const 270
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $2
+  i32.const 256
+  i32.lt_u
+  if (result i32)
+   local.get $2
+   i32.const 4
+   i32.shr_u
+  else
+   i32.const 31
+   i32.const 1073741820
+   local.get $2
+   local.get $2
+   i32.const 1073741820
+   i32.ge_u
+   select
+   local.tee $2
+   i32.clz
+   i32.sub
+   local.tee $4
+   i32.const 7
+   i32.sub
+   local.set $3
+   local.get $2
+   local.get $4
+   i32.const 4
+   i32.sub
+   i32.shr_u
+   i32.const 16
+   i32.xor
+  end
+  local.tee $2
+  i32.const 16
+  i32.lt_u
+  local.get $3
+  i32.const 23
+  i32.lt_u
+  i32.and
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 1568
+   i32.const 284
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $1
+  i32.load $0 offset=8
+  local.set $5
+  local.get $1
+  i32.load $0 offset=4
+  local.tee $4
+  if
+   local.get $4
+   local.get $5
+   i32.store $0 offset=8
+  end
+  local.get $5
+  if
+   local.get $5
+   local.get $4
+   i32.store $0 offset=4
+  end
+  local.get $1
+  local.get $0
+  local.get $3
+  i32.const 4
+  i32.shl
+  local.get $2
+  i32.add
+  i32.const 2
+  i32.shl
+  i32.add
+  i32.load $0 offset=96
+  i32.eq
+  if
+   local.get $0
+   local.get $3
+   i32.const 4
+   i32.shl
+   local.get $2
+   i32.add
+   i32.const 2
+   i32.shl
+   i32.add
+   local.get $5
+   i32.store $0 offset=96
+   local.get $5
+   i32.eqz
+   if
+    local.get $0
+    local.get $3
+    i32.const 2
+    i32.shl
+    i32.add
+    local.tee $1
+    i32.load $0 offset=4
+    i32.const -2
+    local.get $2
+    i32.rotl
+    i32.and
+    local.set $2
+    local.get $1
+    local.get $2
+    i32.store $0 offset=4
+    local.get $2
+    i32.eqz
+    if
+     local.get $0
+     local.get $0
+     i32.load $0
+     i32.const -2
+     local.get $3
+     i32.rotl
+     i32.and
+     i32.store $0
+    end
+   end
+  end
+ )
+ (func $~lib/rt/tlsf/insertBlock (param $0 i32) (param $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  (local $6 i32)
+  local.get $1
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 1568
+   i32.const 201
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $1
+  i32.load $0
+  local.tee $3
+  i32.const 1
+  i32.and
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 1568
+   i32.const 203
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $1
+  i32.const 4
+  i32.add
+  local.get $1
+  i32.load $0
+  i32.const -4
+  i32.and
+  i32.add
+  local.tee $4
+  i32.load $0
+  local.tee $2
+  i32.const 1
+  i32.and
+  if
+   local.get $0
+   local.get $4
+   call $~lib/rt/tlsf/removeBlock
+   local.get $1
+   local.get $3
+   i32.const 4
+   i32.add
+   local.get $2
+   i32.const -4
+   i32.and
+   i32.add
+   local.tee $3
+   i32.store $0
+   local.get $1
+   i32.const 4
+   i32.add
+   local.get $1
+   i32.load $0
+   i32.const -4
+   i32.and
+   i32.add
+   local.tee $4
+   i32.load $0
+   local.set $2
+  end
+  local.get $3
+  i32.const 2
+  i32.and
+  if
+   local.get $1
+   i32.const 4
+   i32.sub
+   i32.load $0
+   local.tee $1
+   i32.load $0
+   local.tee $6
+   i32.const 1
+   i32.and
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 1568
+    i32.const 221
+    i32.const 16
+    call $~lib/builtins/abort
+    unreachable
+   end
+   local.get $0
+   local.get $1
+   call $~lib/rt/tlsf/removeBlock
+   local.get $1
+   local.get $6
+   i32.const 4
+   i32.add
+   local.get $3
+   i32.const -4
+   i32.and
+   i32.add
+   local.tee $3
+   i32.store $0
+  end
+  local.get $4
+  local.get $2
+  i32.const 2
+  i32.or
+  i32.store $0
+  local.get $3
+  i32.const -4
+  i32.and
+  local.tee $2
+  i32.const 12
+  i32.lt_u
+  if
+   i32.const 0
+   i32.const 1568
+   i32.const 233
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $4
+  local.get $1
+  i32.const 4
+  i32.add
+  local.get $2
+  i32.add
+  i32.ne
+  if
+   i32.const 0
+   i32.const 1568
+   i32.const 234
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $4
+  i32.const 4
+  i32.sub
+  local.get $1
+  i32.store $0
+  local.get $2
+  i32.const 256
+  i32.lt_u
+  if (result i32)
+   local.get $2
+   i32.const 4
+   i32.shr_u
+  else
+   i32.const 31
+   i32.const 1073741820
+   local.get $2
+   local.get $2
+   i32.const 1073741820
+   i32.ge_u
+   select
+   local.tee $2
+   i32.clz
+   i32.sub
+   local.tee $3
+   i32.const 7
+   i32.sub
+   local.set $5
+   local.get $2
+   local.get $3
+   i32.const 4
+   i32.sub
+   i32.shr_u
+   i32.const 16
+   i32.xor
+  end
+  local.tee $2
+  i32.const 16
+  i32.lt_u
+  local.get $5
+  i32.const 23
+  i32.lt_u
+  i32.and
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 1568
+   i32.const 251
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $0
+  local.get $5
+  i32.const 4
+  i32.shl
+  local.get $2
+  i32.add
+  i32.const 2
+  i32.shl
+  i32.add
+  i32.load $0 offset=96
+  local.set $3
+  local.get $1
+  i32.const 0
+  i32.store $0 offset=4
+  local.get $1
+  local.get $3
+  i32.store $0 offset=8
+  local.get $3
+  if
+   local.get $3
+   local.get $1
+   i32.store $0 offset=4
+  end
+  local.get $0
+  local.get $5
+  i32.const 4
+  i32.shl
+  local.get $2
+  i32.add
+  i32.const 2
+  i32.shl
+  i32.add
+  local.get $1
+  i32.store $0 offset=96
+  local.get $0
+  local.get $0
+  i32.load $0
+  i32.const 1
+  local.get $5
+  i32.shl
+  i32.or
+  i32.store $0
+  local.get $0
+  local.get $5
+  i32.const 2
+  i32.shl
+  i32.add
+  local.tee $0
+  local.get $0
+  i32.load $0 offset=4
+  i32.const 1
+  local.get $2
+  i32.shl
+  i32.or
+  i32.store $0 offset=4
+ )
+ (func $~lib/rt/tlsf/addMemory (param $0 i32) (param $1 i32) (param $2 i64)
+  (local $3 i32)
+  (local $4 i32)
+  local.get $2
+  local.get $1
+  i64.extend_i32_u
+  i64.lt_u
+  if
+   i32.const 0
+   i32.const 1568
+   i32.const 382
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $1
+  i32.const 19
+  i32.add
+  i32.const -16
+  i32.and
+  i32.const 4
+  i32.sub
+  local.set $1
+  local.get $0
+  i32.load $0 offset=1568
+  local.tee $4
+  if
+   local.get $4
+   i32.const 4
+   i32.add
+   local.get $1
+   i32.gt_u
+   if
+    i32.const 0
+    i32.const 1568
+    i32.const 389
+    i32.const 16
+    call $~lib/builtins/abort
+    unreachable
+   end
+   local.get $1
+   i32.const 16
+   i32.sub
+   local.get $4
+   i32.eq
+   if
+    local.get $4
+    i32.load $0
+    local.set $3
+    local.get $1
+    i32.const 16
+    i32.sub
+    local.set $1
+   end
+  else
+   local.get $0
+   i32.const 1572
+   i32.add
+   local.get $1
+   i32.gt_u
+   if
+    i32.const 0
+    i32.const 1568
+    i32.const 402
+    i32.const 5
+    call $~lib/builtins/abort
+    unreachable
+   end
+  end
+  local.get $2
+  i32.wrap_i64
+  i32.const -16
+  i32.and
+  local.get $1
+  i32.sub
+  local.tee $4
+  i32.const 20
+  i32.lt_u
+  if
+   return
+  end
+  local.get $1
+  local.get $3
+  i32.const 2
+  i32.and
+  local.get $4
+  i32.const 8
+  i32.sub
+  local.tee $3
+  i32.const 1
+  i32.or
+  i32.or
+  i32.store $0
+  local.get $1
+  i32.const 0
+  i32.store $0 offset=4
+  local.get $1
+  i32.const 0
+  i32.store $0 offset=8
+  local.get $1
+  i32.const 4
+  i32.add
+  local.get $3
+  i32.add
+  local.tee $3
+  i32.const 2
+  i32.store $0
+  local.get $0
+  local.get $3
+  i32.store $0 offset=1568
+  local.get $0
+  local.get $1
+  call $~lib/rt/tlsf/insertBlock
+ )
+ (func $~lib/rt/tlsf/initialize
+  (local $0 i32)
+  (local $1 i32)
+  memory.size $0
+  local.tee $1
+  i32.const 0
+  i32.le_s
+  if
+   i32.const 1
+   local.get $1
+   i32.sub
+   memory.grow $0
+   i32.const 0
+   i32.lt_s
+   if
+    unreachable
+   end
+   call $rt/grow-handler/handler
+  end
+  i32.const 34416
+  i32.const 0
+  i32.store $0
+  i32.const 35984
+  i32.const 0
+  i32.store $0
+  loop $for-loop|0
+   local.get $0
+   i32.const 23
+   i32.lt_u
+   if
+    local.get $0
+    i32.const 2
+    i32.shl
+    i32.const 34416
+    i32.add
+    i32.const 0
+    i32.store $0 offset=4
+    i32.const 0
+    local.set $1
+    loop $for-loop|1
+     local.get $1
+     i32.const 16
+     i32.lt_u
+     if
+      local.get $0
+      i32.const 4
+      i32.shl
+      local.get $1
+      i32.add
+      i32.const 2
+      i32.shl
+      i32.const 34416
+      i32.add
+      i32.const 0
+      i32.store $0 offset=96
+      local.get $1
+      i32.const 1
+      i32.add
+      local.set $1
+      br $for-loop|1
+     end
+    end
+    local.get $0
+    i32.const 1
+    i32.add
+    local.set $0
+    br $for-loop|0
+   end
+  end
+  i32.const 34416
+  i32.const 35988
+  memory.size $0
+  i64.extend_i32_s
+  i64.const 16
+  i64.shl
+  call $~lib/rt/tlsf/addMemory
+  i32.const 34416
+  global.set $~lib/rt/tlsf/ROOT
+ )
+ (func $~lib/rt/itcms/step (result i32)
+  (local $0 i32)
+  (local $1 i32)
+  (local $2 i32)
+  block $break|0
+   block $case2|0
+    block $case1|0
+     block $case0|0
+      global.get $~lib/rt/itcms/state
+      br_table $case0|0 $case1|0 $case2|0 $break|0
+     end
+     i32.const 1
+     global.set $~lib/rt/itcms/state
+     i32.const 0
+     global.set $~lib/rt/itcms/visitCount
+     call $~lib/rt/itcms/visitRoots
+     global.get $~lib/rt/itcms/toSpace
+     global.set $~lib/rt/itcms/iter
+     global.get $~lib/rt/itcms/visitCount
+     return
+    end
+    global.get $~lib/rt/itcms/white
+    i32.eqz
+    local.set $1
+    global.get $~lib/rt/itcms/iter
+    i32.load $0 offset=4
+    i32.const -4
+    i32.and
+    local.set $0
+    loop $while-continue|1
+     local.get $0
+     global.get $~lib/rt/itcms/toSpace
+     i32.ne
+     if
+      local.get $0
+      global.set $~lib/rt/itcms/iter
+      local.get $1
+      local.get $0
+      i32.load $0 offset=4
+      i32.const 3
+      i32.and
+      i32.ne
+      if
+       local.get $0
+       local.get $0
+       i32.load $0 offset=4
+       i32.const -4
+       i32.and
+       local.get $1
+       i32.or
+       i32.store $0 offset=4
+       i32.const 0
+       global.set $~lib/rt/itcms/visitCount
+       local.get $0
+       i32.const 20
+       i32.add
+       call $~lib/rt/__visit_members
+       global.get $~lib/rt/itcms/visitCount
+       return
+      end
+      local.get $0
+      i32.load $0 offset=4
+      i32.const -4
+      i32.and
+      local.set $0
+      br $while-continue|1
+     end
+    end
+    i32.const 0
+    global.set $~lib/rt/itcms/visitCount
+    call $~lib/rt/itcms/visitRoots
+    global.get $~lib/rt/itcms/toSpace
+    global.get $~lib/rt/itcms/iter
+    i32.load $0 offset=4
+    i32.const -4
+    i32.and
+    i32.eq
+    if
+     global.get $~lib/memory/__stack_pointer
+     local.set $0
+     loop $while-continue|0
+      local.get $0
+      i32.const 34408
+      i32.lt_u
+      if
+       local.get $0
+       i32.load $0
+       local.tee $2
+       if
+        local.get $2
+        call $byn-split-outlined-A$~lib/rt/itcms/__visit
+       end
+       local.get $0
+       i32.const 4
+       i32.add
+       local.set $0
+       br $while-continue|0
+      end
+     end
+     global.get $~lib/rt/itcms/iter
+     i32.load $0 offset=4
+     i32.const -4
+     i32.and
+     local.set $0
+     loop $while-continue|2
+      local.get $0
+      global.get $~lib/rt/itcms/toSpace
+      i32.ne
+      if
+       local.get $1
+       local.get $0
+       i32.load $0 offset=4
+       i32.const 3
+       i32.and
+       i32.ne
+       if
+        local.get $0
+        local.get $0
+        i32.load $0 offset=4
+        i32.const -4
+        i32.and
+        local.get $1
+        i32.or
+        i32.store $0 offset=4
+        local.get $0
+        i32.const 20
+        i32.add
+        call $~lib/rt/__visit_members
+       end
+       local.get $0
+       i32.load $0 offset=4
+       i32.const -4
+       i32.and
+       local.set $0
+       br $while-continue|2
+      end
+     end
+     global.get $~lib/rt/itcms/fromSpace
+     local.set $0
+     global.get $~lib/rt/itcms/toSpace
+     global.set $~lib/rt/itcms/fromSpace
+     local.get $0
+     global.set $~lib/rt/itcms/toSpace
+     local.get $1
+     global.set $~lib/rt/itcms/white
+     local.get $0
+     i32.load $0 offset=4
+     i32.const -4
+     i32.and
+     global.set $~lib/rt/itcms/iter
+     i32.const 2
+     global.set $~lib/rt/itcms/state
+    end
+    global.get $~lib/rt/itcms/visitCount
+    return
+   end
+   global.get $~lib/rt/itcms/iter
+   local.tee $0
+   global.get $~lib/rt/itcms/toSpace
+   i32.ne
+   if
+    local.get $0
+    i32.load $0 offset=4
+    local.tee $1
+    i32.const -4
+    i32.and
+    global.set $~lib/rt/itcms/iter
+    global.get $~lib/rt/itcms/white
+    i32.eqz
+    local.get $1
+    i32.const 3
+    i32.and
+    i32.ne
+    if
+     i32.const 0
+     i32.const 1296
+     i32.const 229
+     i32.const 20
+     call $~lib/builtins/abort
+     unreachable
+    end
+    local.get $0
+    i32.const 34408
+    i32.lt_u
+    if
+     local.get $0
+     i32.const 0
+     i32.store $0 offset=4
+     local.get $0
+     i32.const 0
+     i32.store $0 offset=8
+    else
+     global.get $~lib/rt/itcms/total
+     local.get $0
+     i32.load $0
+     i32.const -4
+     i32.and
+     i32.const 4
+     i32.add
+     i32.sub
+     global.set $~lib/rt/itcms/total
+     local.get $0
+     i32.const 4
+     i32.add
+     local.tee $0
+     i32.const 34408
+     i32.ge_u
+     if
+      global.get $~lib/rt/tlsf/ROOT
+      i32.eqz
+      if
+       call $~lib/rt/tlsf/initialize
+      end
+      global.get $~lib/rt/tlsf/ROOT
+      local.set $1
+      local.get $0
+      i32.const 4
+      i32.sub
+      local.set $2
+      local.get $0
+      i32.const 15
+      i32.and
+      i32.const 1
+      local.get $0
+      select
+      if (result i32)
+       i32.const 1
+      else
+       local.get $2
+       i32.load $0
+       i32.const 1
+       i32.and
+      end
+      if
+       i32.const 0
+       i32.const 1568
+       i32.const 566
+       i32.const 3
+       call $~lib/builtins/abort
+       unreachable
+      end
+      local.get $2
+      local.get $2
+      i32.load $0
+      i32.const 1
+      i32.or
+      i32.store $0
+      local.get $1
+      local.get $2
+      call $~lib/rt/tlsf/insertBlock
+     end
+    end
+    i32.const 10
+    return
+   end
+   global.get $~lib/rt/itcms/toSpace
+   local.tee $0
+   local.get $0
+   i32.store $0 offset=4
+   local.get $0
+   local.get $0
+   i32.store $0 offset=8
+   i32.const 0
+   global.set $~lib/rt/itcms/state
+  end
+  i32.const 0
+ )
+ (func $~lib/rt/tlsf/searchBlock (param $0 i32) (param $1 i32) (result i32)
+  (local $2 i32)
+  (local $3 i32)
+  local.get $1
+  i32.const 256
+  i32.lt_u
+  if (result i32)
+   local.get $1
+   i32.const 4
+   i32.shr_u
+  else
+   i32.const 31
+   local.get $1
+   i32.const 1
+   i32.const 27
+   local.get $1
+   i32.clz
+   i32.sub
+   i32.shl
+   i32.add
+   i32.const 1
+   i32.sub
+   local.get $1
+   local.get $1
+   i32.const 536870910
+   i32.lt_u
+   select
+   local.tee $1
+   i32.clz
+   i32.sub
+   local.tee $3
+   i32.const 7
+   i32.sub
+   local.set $2
+   local.get $1
+   local.get $3
+   i32.const 4
+   i32.sub
+   i32.shr_u
+   i32.const 16
+   i32.xor
+  end
+  local.tee $1
+  i32.const 16
+  i32.lt_u
+  local.get $2
+  i32.const 23
+  i32.lt_u
+  i32.and
+  i32.eqz
+  if
+   i32.const 0
+   i32.const 1568
+   i32.const 334
+   i32.const 14
+   call $~lib/builtins/abort
+   unreachable
+  end
+  local.get $0
+  local.get $2
+  i32.const 2
+  i32.shl
+  i32.add
+  i32.load $0 offset=4
+  i32.const -1
+  local.get $1
+  i32.shl
+  i32.and
+  local.tee $1
+  if (result i32)
+   local.get $0
+   local.get $1
+   i32.ctz
+   local.get $2
+   i32.const 4
+   i32.shl
+   i32.add
+   i32.const 2
+   i32.shl
+   i32.add
+   i32.load $0 offset=96
+  else
+   local.get $0
+   i32.load $0
+   i32.const -1
+   local.get $2
+   i32.const 1
+   i32.add
+   i32.shl
+   i32.and
+   local.tee $1
+   if (result i32)
+    local.get $0
+    local.get $1
+    i32.ctz
+    local.tee $1
+    i32.const 2
+    i32.shl
+    i32.add
+    i32.load $0 offset=4
+    local.tee $2
+    i32.eqz
+    if
+     i32.const 0
+     i32.const 1568
+     i32.const 347
+     i32.const 18
+     call $~lib/builtins/abort
+     unreachable
+    end
+    local.get $0
+    local.get $2
+    i32.ctz
+    local.get $1
+    i32.const 4
+    i32.shl
+    i32.add
+    i32.const 2
+    i32.shl
+    i32.add
+    i32.load $0 offset=96
+   else
+    i32.const 0
+   end
+  end
+ )
+ (func $~lib/rt/__visit_members (param $0 i32)
+  (local $1 i32)
+  block $invalid
+   block $~lib/array/Array<i32>
+    block $~lib/arraybuffer/ArrayBufferView
+     block $~lib/string/String
+      block $~lib/arraybuffer/ArrayBuffer
+       block $~lib/object/Object
+        local.get $0
+        i32.const 8
+        i32.sub
+        i32.load $0
+        br_table $~lib/object/Object $~lib/arraybuffer/ArrayBuffer $~lib/string/String $~lib/arraybuffer/ArrayBufferView $~lib/array/Array<i32> $invalid
+       end
+       return
+      end
+      return
+     end
+     return
+    end
+    local.get $0
+    i32.load $0
+    local.tee $0
+    if
+     local.get $0
+     call $byn-split-outlined-A$~lib/rt/itcms/__visit
+    end
+    return
+   end
+   global.get $~lib/memory/__stack_pointer
+   i32.const 4
+   i32.sub
+   global.set $~lib/memory/__stack_pointer
+   global.get $~lib/memory/__stack_pointer
+   i32.const 1640
+   i32.lt_s
+   if
+    i32.const 34432
+    i32.const 34480
+    i32.const 1
+    i32.const 1
+    call $~lib/builtins/abort
+    unreachable
+   end
+   global.get $~lib/memory/__stack_pointer
+   local.tee $1
+   i32.const 0
+   i32.store $0
+   local.get $1
+   local.get $0
+   i32.store $0
+   local.get $0
+   i32.load $0
+   local.tee $0
+   if
+    local.get $0
+    call $byn-split-outlined-A$~lib/rt/itcms/__visit
+   end
+   global.get $~lib/memory/__stack_pointer
+   i32.const 4
+   i32.add
+   global.set $~lib/memory/__stack_pointer
+   return
+  end
+  unreachable
+ )
+ (func $~start
+  memory.size $0
+  i32.const 16
+  i32.shl
+  i32.const 34408
+  i32.sub
+  i32.const 1
+  i32.shr_u
+  global.set $~lib/rt/itcms/threshold
+  i32.const 1348
+  i32.const 1344
+  i32.store $0
+  i32.const 1352
+  i32.const 1344
+  i32.store $0
+  i32.const 1344
+  global.set $~lib/rt/itcms/pinSpace
+  i32.const 1380
+  i32.const 1376
+  i32.store $0
+  i32.const 1384
+  i32.const 1376
+  i32.store $0
+  i32.const 1376
+  global.set $~lib/rt/itcms/toSpace
+  i32.const 1524
+  i32.const 1520
+  i32.store $0
+  i32.const 1528
+  i32.const 1520
+  i32.store $0
+  i32.const 1520
+  global.set $~lib/rt/itcms/fromSpace
+ )
+ (func $~lib/array/ensureCapacity (param $0 i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  (local $6 i32)
+  (local $7 i32)
+  (local $8 i32)
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.sub
+  global.set $~lib/memory/__stack_pointer
+  global.get $~lib/memory/__stack_pointer
+  i32.const 1640
+  i32.lt_s
+  if
+   i32.const 34432
+   i32.const 34480
+   i32.const 1
+   i32.const 1
+   call $~lib/builtins/abort
+   unreachable
+  end
+  global.get $~lib/memory/__stack_pointer
+  local.tee $1
+  i32.const 0
+  i32.store $0
+  local.get $1
+  i32.const 1088
+  i32.store $0
+  local.get $0
+  i32.const 1096
+  i32.load $0
+  local.tee $1
+  i32.const 2
+  i32.shr_u
+  i32.gt_u
+  if
+   local.get $0
+   i32.const 268435455
+   i32.gt_u
+   if
+    i32.const 1136
+    i32.const 1184
+    i32.const 19
+    i32.const 48
+    call $~lib/builtins/abort
+    unreachable
+   end
+   global.get $~lib/memory/__stack_pointer
+   i32.const 1088
+   i32.store $0
+   block $__inlined_func$~lib/rt/itcms/__renew
+    i32.const 1073741820
+    local.get $1
+    i32.const 1
+    i32.shl
+    local.tee $1
+    local.get $1
+    i32.const 1073741820
+    i32.ge_u
+    select
+    local.tee $1
+    i32.const 8
+    local.get $0
+    local.get $0
+    i32.const 8
+    i32.le_u
+    select
+    i32.const 2
+    i32.shl
+    local.tee $0
+    local.get $0
+    local.get $1
+    i32.lt_u
+    select
+    local.tee $2
+    i32.const 1088
+    i32.load $0
+    local.tee $1
+    i32.const 20
+    i32.sub
+    local.tee $5
+    i32.load $0
+    i32.const -4
+    i32.and
+    i32.const 16
+    i32.sub
+    i32.le_u
+    if
+     local.get $5
+     local.get $2
+     i32.store $0 offset=16
+     local.get $1
+     local.set $0
+     br $__inlined_func$~lib/rt/itcms/__renew
+    end
+    local.get $5
+    i32.load $0 offset=12
+    local.set $6
+    local.get $2
+    i32.const 1073741804
+    i32.ge_u
+    if
+     i32.const 1232
+     i32.const 1296
+     i32.const 261
+     i32.const 31
+     call $~lib/builtins/abort
+     unreachable
+    end
+    global.get $~lib/rt/itcms/total
+    global.get $~lib/rt/itcms/threshold
+    i32.ge_u
+    if
+     block $__inlined_func$~lib/rt/itcms/interrupt
+      i32.const 2048
+      local.set $0
+      loop $do-loop|0
+       local.get $0
+       call $~lib/rt/itcms/step
+       i32.sub
+       local.set $0
+       global.get $~lib/rt/itcms/state
+       i32.eqz
+       if
+        global.get $~lib/rt/itcms/total
+        i64.extend_i32_u
+        i64.const 200
+        i64.mul
+        i64.const 100
+        i64.div_u
+        i32.wrap_i64
+        i32.const 1024
+        i32.add
+        global.set $~lib/rt/itcms/threshold
+        br $__inlined_func$~lib/rt/itcms/interrupt
+       end
+       local.get $0
+       i32.const 0
+       i32.gt_s
+       br_if $do-loop|0
+      end
+      global.get $~lib/rt/itcms/total
+      local.tee $0
+      local.get $0
+      global.get $~lib/rt/itcms/threshold
+      i32.sub
+      i32.const 1024
+      i32.lt_u
+      i32.const 10
+      i32.shl
+      i32.add
+      global.set $~lib/rt/itcms/threshold
+     end
+    end
+    global.get $~lib/rt/tlsf/ROOT
+    i32.eqz
+    if
+     call $~lib/rt/tlsf/initialize
+    end
+    global.get $~lib/rt/tlsf/ROOT
+    local.set $3
+    local.get $2
+    i32.const 16
+    i32.add
+    local.tee $0
+    i32.const 1073741820
+    i32.gt_u
+    if
+     i32.const 1232
+     i32.const 1568
+     i32.const 462
+     i32.const 29
+     call $~lib/builtins/abort
+     unreachable
+    end
+    local.get $3
+    i32.const 12
+    local.get $0
+    i32.const 19
+    i32.add
+    i32.const -16
+    i32.and
+    i32.const 4
+    i32.sub
+    local.get $0
+    i32.const 12
+    i32.le_u
+    select
+    local.tee $7
+    call $~lib/rt/tlsf/searchBlock
+    local.tee $0
+    i32.eqz
+    if
+     memory.size $0
+     local.tee $0
+     local.get $7
+     i32.const 256
+     i32.ge_u
+     if (result i32)
+      local.get $7
+      i32.const 1
+      i32.const 27
+      local.get $7
+      i32.clz
+      i32.sub
+      i32.shl
+      i32.add
+      i32.const 1
+      i32.sub
+      local.get $7
+      local.get $7
+      i32.const 536870910
+      i32.lt_u
+      select
+     else
+      local.get $7
+     end
+     i32.const 4
+     local.get $3
+     i32.load $0 offset=1568
+     local.get $0
+     i32.const 16
+     i32.shl
+     i32.const 4
+     i32.sub
+     i32.ne
+     i32.shl
+     i32.add
+     i32.const 65535
+     i32.add
+     i32.const -65536
+     i32.and
+     i32.const 16
+     i32.shr_u
+     local.tee $4
+     local.get $0
+     local.get $4
+     i32.gt_s
+     select
+     memory.grow $0
+     i32.const 0
+     i32.lt_s
+     if
+      local.get $4
+      memory.grow $0
+      i32.const 0
+      i32.lt_s
+      if
+       unreachable
+      end
+     end
+     call $rt/grow-handler/handler
+     local.get $3
+     local.get $0
+     i32.const 16
+     i32.shl
+     memory.size $0
+     i64.extend_i32_s
+     i64.const 16
+     i64.shl
+     call $~lib/rt/tlsf/addMemory
+     local.get $3
+     local.get $7
+     call $~lib/rt/tlsf/searchBlock
+     local.tee $0
+     i32.eqz
+     if
+      i32.const 0
+      i32.const 1568
+      i32.const 503
+      i32.const 16
+      call $~lib/builtins/abort
+      unreachable
+     end
+    end
+    local.get $7
+    local.get $0
+    i32.load $0
+    i32.const -4
+    i32.and
+    i32.gt_u
+    if
+     i32.const 0
+     i32.const 1568
+     i32.const 505
+     i32.const 14
+     call $~lib/builtins/abort
+     unreachable
+    end
+    local.get $3
+    local.get $0
+    call $~lib/rt/tlsf/removeBlock
+    local.get $0
+    i32.load $0
+    local.set $4
+    local.get $7
+    i32.const 4
+    i32.add
+    i32.const 15
+    i32.and
+    if
+     i32.const 0
+     i32.const 1568
+     i32.const 361
+     i32.const 14
+     call $~lib/builtins/abort
+     unreachable
+    end
+    local.get $4
+    i32.const -4
+    i32.and
+    local.get $7
+    i32.sub
+    local.tee $8
+    i32.const 16
+    i32.ge_u
+    if
+     local.get $0
+     local.get $7
+     local.get $4
+     i32.const 2
+     i32.and
+     i32.or
+     i32.store $0
+     local.get $0
+     i32.const 4
+     i32.add
+     local.get $7
+     i32.add
+     local.tee $4
+     local.get $8
+     i32.const 4
+     i32.sub
+     i32.const 1
+     i32.or
+     i32.store $0
+     local.get $3
+     local.get $4
+     call $~lib/rt/tlsf/insertBlock
+    else
+     local.get $0
+     local.get $4
+     i32.const -2
+     i32.and
+     i32.store $0
+     local.get $0
+     i32.const 4
+     i32.add
+     local.get $0
+     i32.load $0
+     i32.const -4
+     i32.and
+     i32.add
+     local.tee $3
+     local.get $3
+     i32.load $0
+     i32.const -3
+     i32.and
+     i32.store $0
+    end
+    local.get $0
+    local.get $6
+    i32.store $0 offset=12
+    local.get $0
+    local.get $2
+    i32.store $0 offset=16
+    global.get $~lib/rt/itcms/fromSpace
+    local.tee $3
+    i32.load $0 offset=8
+    local.set $4
+    local.get $0
+    local.get $3
+    global.get $~lib/rt/itcms/white
+    i32.or
+    i32.store $0 offset=4
+    local.get $0
+    local.get $4
+    i32.store $0 offset=8
+    local.get $4
+    local.get $0
+    local.get $4
+    i32.load $0 offset=4
+    i32.const 3
+    i32.and
+    i32.or
+    i32.store $0 offset=4
+    local.get $3
+    local.get $0
+    i32.store $0 offset=8
+    global.get $~lib/rt/itcms/total
+    local.get $0
+    i32.load $0
+    i32.const -4
+    i32.and
+    i32.const 4
+    i32.add
+    i32.add
+    global.set $~lib/rt/itcms/total
+    local.get $0
+    i32.const 20
+    i32.add
+    local.tee $0
+    i32.const 0
+    local.get $2
+    memory.fill $0
+    local.get $0
+    local.get $1
+    local.get $2
+    local.get $5
+    i32.load $0 offset=16
+    local.tee $3
+    local.get $2
+    local.get $3
+    i32.lt_u
+    select
+    memory.copy $0 $0
+   end
+   local.get $0
+   local.get $1
+   i32.ne
+   if
+    i32.const 1088
+    local.get $0
+    i32.store $0
+    i32.const 1092
+    local.get $0
+    i32.store $0
+    local.get $0
+    if
+     global.get $~lib/rt/itcms/white
+     local.get $0
+     i32.const 20
+     i32.sub
+     local.tee $0
+     i32.load $0 offset=4
+     i32.const 3
+     i32.and
+     i32.eq
+     if
+      i32.const 1072
+      i32.load $0
+      i32.const 3
+      i32.and
+      local.tee $1
+      global.get $~lib/rt/itcms/white
+      i32.eqz
+      i32.eq
+      if
+       local.get $0
+       call $~lib/rt/itcms/Object#makeGray
+      else
+       global.get $~lib/rt/itcms/state
+       i32.const 1
+       i32.eq
+       local.get $1
+       i32.const 3
+       i32.eq
+       i32.and
+       if
+        local.get $0
+        call $~lib/rt/itcms/Object#makeGray
+       end
+      end
+     end
+    end
+   end
+   i32.const 1096
+   local.get $2
+   i32.store $0
+  end
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.add
+  global.set $~lib/memory/__stack_pointer
+ )
+ (func $rt/grow-handler/stress
+  (local $0 i32)
+  (local $1 i32)
+  (local $2 i32)
+  global.get $~lib/memory/__stack_pointer
+  i32.const 4
+  i32.sub
+  global.set $~lib/memory/__stack_pointer
+  block $folding-inner0
+   global.get $~lib/memory/__stack_pointer
+   i32.const 1640
+   i32.lt_s
+   br_if $folding-inner0
+   global.get $~lib/memory/__stack_pointer
+   i32.const 0
+   i32.store $0
+   loop $for-loop|0
+    local.get $0
+    i32.const 65536
+    i32.lt_s
+    if
+     global.get $~lib/memory/__stack_pointer
+     local.tee $1
+     i32.const 1088
+     i32.store $0
+     local.get $1
+     i32.const 4
+     i32.sub
+     global.set $~lib/memory/__stack_pointer
+     global.get $~lib/memory/__stack_pointer
+     i32.const 1640
+     i32.lt_s
+     br_if $folding-inner0
+     global.get $~lib/memory/__stack_pointer
+     local.tee $1
+     i32.const 0
+     i32.store $0
+     local.get $1
+     i32.const 1088
+     i32.store $0
+     i32.const 1100
+     i32.load $0
+     local.tee $1
+     i32.const 1
+     i32.add
+     local.tee $2
+     call $~lib/array/ensureCapacity
+     global.get $~lib/memory/__stack_pointer
+     i32.const 1088
+     i32.store $0
+     i32.const 1092
+     i32.load $0
+     local.get $1
+     i32.const 2
+     i32.shl
+     i32.add
+     local.get $0
+     i32.store $0
+     global.get $~lib/memory/__stack_pointer
+     i32.const 1088
+     i32.store $0
+     i32.const 1100
+     local.get $2
+     i32.store $0
+     global.get $~lib/memory/__stack_pointer
+     i32.const 4
+     i32.add
+     global.set $~lib/memory/__stack_pointer
+     local.get $0
+     i32.const 1
+     i32.add
+     local.set $0
+     br $for-loop|0
+    end
+   end
+   global.get $~lib/memory/__stack_pointer
+   i32.const 4
+   i32.add
+   global.set $~lib/memory/__stack_pointer
+   return
+  end
+  i32.const 34432
+  i32.const 34480
+  i32.const 1
+  i32.const 1
+  call $~lib/builtins/abort
+  unreachable
+ )
+ (func $byn-split-outlined-A$~lib/rt/itcms/__visit (param $0 i32)
+  global.get $~lib/rt/itcms/white
+  local.get $0
+  i32.const 20
+  i32.sub
+  local.tee $0
+  i32.load $0 offset=4
+  i32.const 3
+  i32.and
+  i32.eq
+  if
+   local.get $0
+   call $~lib/rt/itcms/Object#makeGray
+   global.get $~lib/rt/itcms/visitCount
+   i32.const 1
+   i32.add
+   global.set $~lib/rt/itcms/visitCount
+  end
+ )
+)
diff --git a/tests/compiler/rt/grow-handler.ts b/tests/compiler/rt/grow-handler.ts
new file mode 100644
index 0000000000..af12f7b747
--- /dev/null
+++ b/tests/compiler/rt/grow-handler.ts
@@ -0,0 +1,7 @@
+@external("grow", "handler")
+declare function handler(): void;
+
+let leak: i32[] = [];
+export function stress(): void {
+  for (let i = 0; i < 65536; i++) leak.push(i);
+}
\ No newline at end of file