feat(traceback): 在 main 入口直接调用 Install()

MinGW 下 .ctors.65534 不被 CRT 执行，导致 Ctrl+C 无栈；改为编译期把 traceback_sha1.Install() 注入 main 入口，不依赖 .ctors/.init_array。

lib/Projectrans/Phase2Translator.py

@@ -2354,6 +2354,19 @@ class Phase2Translator:
             and os.path.basename(src_path) in _TRACEBACK_MODULE_FILES)
         if _traceback_ctor:
             trans.translator.TracebackCtor = True
+        # --traceback：记录 traceback.Install 的跨模块符号名，含 main 的模块在入口
+        # 直接调用它（不依赖 .ctors/.init_array，避免 MinGW 下 .ctors.65534 不执行）。
+        if self.traceback_enabled:
+            _tb_sha1: str | None = None
+            for _src_map in (getattr(self, '_shared_source_module_sig_files', {}), self.sig_files):
+                for _k, _p in _src_map.items():
+                    if 'traceback' in os.path.basename(_p):
+                        _tb_sha1 = _k
+                        break
+                if _tb_sha1:
+                    break
+            if _tb_sha1 is not None:
+                trans.translator.TracebackInstallSymbol = f'{_tb_sha1}.Install'
         trans.SliceLevel = self.slice_level
         trans.translator.SliceLevel = self.slice_level
         trans.translator.SliceCount = 0

lib/core/Handles/HandlesFunctions.py

@@ -2054,6 +2054,13 @@ class FunctionHandle(BaseHandle):
             func_body = func_body[1:]
         else:
             Gen._create_doc_global(doc_symbol, None)
+        if Node.name == 'main':
+            _tb_install: str | None = getattr(self.Trans, 'TracebackInstallSymbol', None)
+            if _tb_install:
+                _install_fn = Gen._CreateOrReuseFuncDecl(
+                    _tb_install, ir.FunctionType(ir.IntType(32), []))
+                _entry_block = func.blocks[0] if func.blocks else func.append_basic_block('entry')
+                ir.IRBuilder(_entry_block).call(_install_fn, [])
         try:
             self.Trans.BodyHandler.HandleBodyLlvm(func_body)
         except Exception as _body_exc: