From caf86199f09538269930ee679d2852a73671d46f Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Sat, 8 Jan 2022 19:44:08 +0000
Subject: [PATCH] [TS] Use export_/import_name to filter exposed symbols

---
 genbindings.sh        |  2 +-
 ts/js-wasm.h          |  8 ++------
 typescript_strings.py | 13 +++++--------
 3 files changed, 8 insertions(+), 15 deletions(-)

diff --git a/genbindings.sh b/genbindings.sh
index 77c936d9..bb14f62f 100755
--- a/genbindings.sh
+++ b/genbindings.sh
@@ -199,7 +199,7 @@ else
 	cat ts/bindings.c.body >> ts/bindings.c
 
 	echo "Building TS bindings..."
-	COMPILE="$COMMON_COMPILE -flto -Wl,--no-entry -Wl,--export-dynamic -Wl,-allow-undefined -nostdlib --target=wasm32-wasi"
+	COMPILE="$COMMON_COMPILE -flto -Wl,--no-entry -nostdlib --target=wasm32-wasi"
 	# We only need malloc and assert/abort, but for now just use WASI for those:
 	#EXTRA_LINK=/usr/lib/wasm32-wasi/libc.a
 	EXTRA_LINK=
diff --git a/ts/js-wasm.h b/ts/js-wasm.h
index 886c4e85..abcb5b30 100644
--- a/ts/js-wasm.h
+++ b/ts/js-wasm.h
@@ -2,14 +2,10 @@
 #include <stdint.h>
 #include <stddef.h>
 
-static inline size_t strlen(const char *str) {
-	const char *s;
-	for (s = str; *s; ++s) ;
-	return (s - str);
-}
+extern size_t strlen(const char *s);
 
 typedef uint32_t JSValue;
-extern JSValue js_invoke_function(JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue);
+extern JSValue js_invoke_function(JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue,JSValue) __attribute__((import_name("js_invoke_function")));
 
 static inline JSValue js_invoke_function_0(JSValue obj, JSValue fn){
   return js_invoke_function(obj,fn,0,0,0,0,0,0,0,0,0,0);
diff --git a/typescript_strings.py b/typescript_strings.py
index a24faea7..0453a79a 100644
--- a/typescript_strings.py
+++ b/typescript_strings.py
@@ -103,12 +103,12 @@ void *memset(void *s, int c, size_t n);
 void *memcpy(void *dest, const void *src, size_t n);
 int memcmp(const void *s1, const void *s2, size_t n);
 
-void __attribute__((noreturn)) abort(void);
+extern void __attribute__((noreturn)) abort(void);
 static inline void assert(bool expression) {
 	if (!expression) { abort(); }
 }
 
-uint32_t __attribute__((visibility("default"))) test_bigint_pass_deadbeef0badf00d(uint64_t val) {
+uint32_t __attribute__((export_name("test_bigint_pass_deadbeef0badf00d"))) test_bigint_pass_deadbeef0badf00d(uint64_t val) {
 	return val == 0xdeadbeef0badf00dULL;
 }
 
@@ -279,10 +279,10 @@ static inline LDKStr str_ref_to_owned_c(const jstring str) {
 
 typedef bool jboolean;
 
-uint32_t __attribute__((visibility("default"))) TS_malloc(uint32_t size) {
+uint32_t __attribute__((export_name("TS_malloc"))) TS_malloc(uint32_t size) {
 	return (uint32_t)MALLOC(size, "JS-Called malloc");
 }
-void __attribute__((visibility("default"))) TS_free(uint32_t ptr) {
+void __attribute__((export_name("TS_free"))) TS_free(uint32_t ptr) {
 	FREE((void*)ptr);
 }
 """
@@ -355,7 +355,7 @@ import * as InternalUtils from '../InternalUtils.mjs'
         return "str_ref_to_owned_c(" + var_name + ")"
 
     def c_fn_name_define_pfx(self, fn_name, have_args):
-        return " __attribute__((visibility(\"default\"))) TS_" + fn_name + "("
+        return " __attribute__((export_name(\"TS_" + fn_name + "\"))) TS_" + fn_name + "("
 
     def wasm_import_header(self, target):
         res = """
@@ -364,9 +364,6 @@ imports.env = {};
 
 var js_objs: Array<WeakRef<object>> = [];
 var js_invoke: Function;
-imports.env["abort"] = function () {
-	console.error("ABORT");
-};
 
 imports.wasi_snapshot_preview1 = {
 	"fd_write" : () => {
-- 
2.39.5