Keep source file descriptors stable for the lifetime of the VM and execute included fragments in the enclosing method and closure context

include/ph7int.h

@@ -902,6 +902,16 @@ typedef struct ph7_vm_func_static_var  ph7_vm_func_static_var;
 typedef struct ph7_vm_func_arg ph7_vm_func_arg;
 typedef struct ph7_vm_func ph7_vm_func;
 typedef struct VmFrame VmFrame;
+/* Lexical exit bridges in the bytecode containing an include statement. */
+typedef struct ph7_include ph7_include;
+struct ph7_include {
+	char *zPath;
+	sxu32 nBreak;
+	sxu32 nContinue;
+	SySet aLabel;
+	ph7_vm_func *pFunc;
+	sxbool bException;
+};
 /*
  * Each collected function argument is recorded in an instance
  * of the following structure.
@@ -1205,7 +1215,7 @@ struct ph7_vm {
 	SyBlob sArgv;               /* $argv[] collector [refer to the [getopt()] implementation for more information] */
 	SySet aModules;             /* Set of loaded modules */
 	SySet aModuleHandles;       /* Libraries retained after initialization attempts */
-	SySet aFiles;               /* Stack of processed files */
+	SySet aFiles;               /* SyString pointers, VM-owned until release */
 	SySet aPaths;               /* Set of import paths */
 	SySet aIncluded;            /* Set of included files */
 	SyHash hRequired;           /* Resolved require paths, including pending evaluations */
@@ -1730,6 +1740,7 @@ PH7_PRIVATE sxi32 PH7_InitCodeGenerator(ph7_vm *pVm, ProcConsumer xErr, void *pE
 PH7_PRIVATE sxi32 PH7_ResetCodeGenerator(ph7_vm *pVm, ProcConsumer xErr, void *pErrData);
 PH7_PRIVATE sxi32 PH7_GenCompileError(ph7_gen_state *pGen, sxi32 nErrType, sxu32 nLine, const char *zFormat, ...);
 PH7_PRIVATE sxi32 PH7_CompileAerScript(ph7_vm *pVm, SyString *pScript, sxi32 iFlags);
+PH7_PRIVATE sxi32 PH7_CompileIncludedChunk(ph7_vm *pVm, SyString *pScript, ph7_vm_func *pFunc, ph7_include *pInclude);
 /* constant.c function prototypes */
 PH7_PRIVATE void PH7_RegisterBuiltInConstant(ph7_vm *pVm);
 /* builtin.c function prototypes */