From 163e6ec14b9ddba9232d2c1a3159e0d8870c6ebc Mon Sep 17 00:00:00 2001
From: Thorsten Beier <derthorstenbeier@gmail.com>
Date: Tue, 19 Sep 2023 10:01:52 +0200
Subject: [PATCH] using -fexception instead of fwasm-exception (#48)

---
 CMakeLists.txt                  | 12 ++++++---
 include/pyjs/post_js/fixes.js   |  7 +++--
 include/pyjs/pre_js/load_pkg.js | 45 ++++++++++++++++++++++-----------
 src/js_timestamp.cpp            |  2 +-
 4 files changed, 44 insertions(+), 22 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ae5caf5..4b84e1d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -140,14 +140,16 @@ target_link_libraries(pyjs PRIVATE ${PYTHON_UTIL_LIBS} pybind11::embed)
         PUBLIC --std=c++17
         PUBLIC -Wno-deprecated
         PUBLIC "SHELL: --bind"
-        PUBLIC "SHELL: -fwasm-exceptions"
+        PUBLIC "SHELL: -fexceptions"
     )
 
     target_link_options(pyjs
         PUBLIC --bind
         PUBLIC -Wno-unused-command-line-argument
         PUBLIC "SHELL: --bind"
-        PUBLIC "SHELL: -fwasm-exceptions"
+        PUBLIC "SHELL: -fexceptions"
+        #PUBLIC "SHELL:-s EXPORT_EXCEPTION_HANDLING_HELPERS"
+        #PUBLIC "SHELL:-s EXCEPTION_CATCHING_ALLOWED=['we only want to allow exception handling in side modules']"
     )
 
 
@@ -213,7 +215,8 @@ target_compile_options(pyjs_runtime_browser
     PUBLIC -Wno-deprecated
     PUBLIC "SHELL: --bind"
     PUBLIC "SHELL: -s ENVIRONMENT=${ENVIRONMENT}"
-    PUBLIC "SHELL: -fwasm-exceptions"
+    PUBLIC "SHELL: -fexceptions"
+    #PUBLIC "SHELL:-s EXPORT_EXCEPTION_HANDLING_HELPERS"
     PUBLIC "SHELL: -s FORCE_FILESYSTEM"
     PUBLIC "SHELL: -s LZ4=1"
     PUBLIC "SHELL: -flto"
@@ -234,7 +237,8 @@ target_link_options(pyjs_runtime_browser
     PUBLIC "SHELL: -s EXIT_RUNTIME=1"
     PUBLIC "SHELL: -s WASM=1"
     PUBLIC "SHELL: -s USE_PTHREADS=0"
-    PUBLIC "SHELL: -fwasm-exceptions"
+    PUBLIC "SHELL: -s ENVIRONMENT=${ENVIRONMENT}"
+    PUBLIC "SHELL: -fexceptions"
     PUBLIC "SHELL: -s MAIN_MODULE=1"
     PUBLIC "SHELL: -s ENVIRONMENT=${ENVIRONMENT}"
     PUBLIC "SHELL: -s TOTAL_STACK=16mb"
diff --git a/include/pyjs/post_js/fixes.js b/include/pyjs/post_js/fixes.js
index f17dbf6..3260295 100644
--- a/include/pyjs/post_js/fixes.js
+++ b/include/pyjs/post_js/fixes.js
@@ -2,5 +2,8 @@ if (!('wasmTable' in Module)) {
     Module['wasmTable'] = wasmTable
 }
 
-
-Module['FS'] = FS
\ No newline at end of file
+Module['FS'] = FS
+Module['PATH'] = PATH
+Module['LDSO'] = LDSO
+Module['getDylinkMetadata'] = getDylinkMetadata
+Module['loadDynamicLibrary'] = loadDynamicLibrary
diff --git a/include/pyjs/pre_js/load_pkg.js b/include/pyjs/pre_js/load_pkg.js
index 584126a..504bac0 100644
--- a/include/pyjs/pre_js/load_pkg.js
+++ b/include/pyjs/pre_js/load_pkg.js
@@ -28,6 +28,13 @@ import shutil
 import os
 import sys
 
+
+def check_wasm_magic_number(file_path: Path) -> bool:
+    WASM_BINARY_MAGIC = b"\\0asm"
+    with file_path.open(mode="rb") as file:
+        return file.read(4) == WASM_BINARY_MAGIC
+
+    
 target_dir = "${target_dir}"
 if target_dir == "":
     target_dir = sys.prefix
@@ -44,6 +51,11 @@ try:
                     shared_libs.append(f"{target_dir}/{file.name}")
 
         tar.extractall(target_dir)
+        for file in shared_libs:
+            if not check_wasm_magic_number(Path(file)):
+                print(f" {file} is not a wasm file")
+            else:
+                print(f" {file} is a wasm file")
         s = json.dumps(shared_libs)
 except Exception as e:
     print("ERROR",e)
@@ -84,7 +96,8 @@ Module["bootstrap_from_empack_packed_environment"] = async function
     (   
         packages_json_url,
         package_tarballs_root_url,
-        verbose = false
+        verbose = false,
+        skip_loading_shared_libs = true
     ) {
 
 
@@ -153,22 +166,24 @@ Module["bootstrap_from_empack_packed_environment"] = async function
     // create array with size 
     let shared_libs = await Promise.all(packages.map(package => fetchAndUntar(package_tarballs_root_url, python_is_ready_promise, package)))
 
-    // instantiate all packages
-    for (let i = 0; i < packages.length; i++) {
-
-        // if we have any shared libraries, load them
-        if (shared_libs[i].length > 0) {
+    if(!skip_loading_shared_libs){
+        // instantiate all packages
+        for (let i = 0; i < packages.length; i++) {
 
-            for (let j = 0; j < shared_libs[i].length; j++) {
-                let sl = shared_libs[i][j];
+            // if we have any shared libraries, load them
+            if (shared_libs[i].length > 0) {
+
+                for (let j = 0; j < shared_libs[i].length; j++) {
+                    let sl = shared_libs[i][j];
+                }
+                await Module._loadDynlibsFromPackage(
+                    prefix,
+                    python_version,
+                    packages[i].name,
+                    false,
+                    shared_libs[i]
+                )
             }
-            await Module._loadDynlibsFromPackage(
-                prefix,
-                python_version,
-                packages[i].name,
-                false,
-                shared_libs[i]
-            )
         }
     }
 }
\ No newline at end of file
diff --git a/src/js_timestamp.cpp b/src/js_timestamp.cpp
index 19a11ee..a17eeda 100644
--- a/src/js_timestamp.cpp
+++ b/src/js_timestamp.cpp
@@ -1 +1 @@
-#define PYJS_JS_UTC_TIMESTAMP "2023-09-05 07:59:30.761501"
\ No newline at end of file
+#define PYJS_JS_UTC_TIMESTAMP "2023-09-12 06:47:21.229070"
\ No newline at end of file