Fix trap in UI example:

- new min/max macros create an ungodly amount of locals in unoptimized builds, which caused stack overflows when recursing in UI layout code. As a quick fix, we now pass -O1 when building the wasm sdk to do the bare minimum cleanup.
- Also set the wasm3 stack to a more reasonable 1MB size
- TODO: investigate why such simple macros generate so much locals... maybe reintroduce a simpler version of our old hygienic macros if it's worth it for debug builds.
- TODO: convert UI layout code to an iterative version to completely avoid potential stack overflows.

scripts/dev.py

@@ -528,7 +528,7 @@ def build_wasm3(release):
 
 
 def build_wasm3_lib_win(release):
-    debug_flags = ["/O2", "/Zi"] if release else ["/Zi"]
+    debug_flags = ["/O2", "/Zi"] if release else ["/O1", "/Zi"]
 
     for f in glob.iglob("./src/ext/wasm3/source/*.c"):
         name = os.path.splitext(os.path.basename(f))[0]
@@ -548,7 +548,7 @@ def build_wasm3_lib_win(release):
 
 def build_wasm3_lib_mac(release):
     includes = ["-Isrc/ext/wasm3/source"]
-    debug_flags = ["-g", "-O2"]
+    debug_flags = ["-g", "-O2"] if release else ["-g", "-O1"]
     flags = [
         *debug_flags,
         "-foptimize-sibling-calls",
@@ -958,7 +958,8 @@ def build_sdk_internal(release):
         "-I", "build/orca-libc/include",
     ]
 
-    debug_flags = ["-O2", "-DNDEBUG"] if release else ["-g"]
+    # we still use -O1 for debug, otherwise clang generates an ungodly amount of locals for no reason
+    debug_flags = ["-O2", "-DNDEBUG"] if release else ["-g", "-O1"]
 
     flags = [
         *debug_flags,

src/wasm/backend_wasm3.c

@@ -521,7 +521,7 @@ oc_wasm* oc_wasm_create(void)
     wasm->arena = arena;
     oc_list_init(&wasm->bindings);
 
-    u32 stackSize = 65536;
+    u32 stackSize = 1 << 20;
     wasm->m3Env = m3_NewEnvironment();
     wasm->m3Runtime = m3_NewRuntime(wasm->m3Env, stackSize, NULL);