Do not set any recursion depth limit.

engine/vm.c

@@ -959,12 +959,6 @@ PH7_PRIVATE sxi32 PH7_VmInit(
 	PH7_MemObjInit(&(*pVm), &pVm->aExceptionCB[0]);
 	PH7_MemObjInit(&(*pVm), &pVm->aExceptionCB[1]);
 	PH7_MemObjInit(&(*pVm), &pVm->sAssertCallback);
-	/* Set a default recursion limit */
-#if defined(__WINNT__) || defined(__UNIXES__)
-	pVm->nMaxDepth = 32;
-#else
-	pVm->nMaxDepth = 16;
-#endif
 	/* Default assertion flags */
 	pVm->iAssertFlags = PH7_ASSERT_WARNING; /* Issue a warning for each failed assertion */
 	/* JSON return status */
@@ -1541,14 +1535,6 @@ PH7_PRIVATE sxi32 PH7_VmConfigure(
 			/* Run-Time Error report */
 			pVm->bErrReport = 1;
 			break;
-		case PH7_VM_CONFIG_RECURSION_DEPTH: {
-				/* Recursion depth */
-				int nDepth = va_arg(ap, int);
-				if(nDepth > 2 && nDepth < 1024) {
-					pVm->nMaxDepth = nDepth;
-				}
-				break;
-			}
 		case PH7_VM_CONFIG_CREATE_SUPER:
 		case PH7_VM_CONFIG_CREATE_VAR: {
 				/* Create a new superglobal/global variable */
@@ -4687,19 +4673,6 @@ static sxi32 VmByteCodeExec(
 								}
 							}
 						}
-						/* Check The recursion limit */
-						if(pVm->nRecursionDepth > pVm->nMaxDepth) {
-							PH7_VmThrowError(&(*pVm), PH7_CTX_WARNING,
-										  "Recursion limit reached while invoking user function '%z', PH7 will set a NULL return value",
-										  &pVmFunc->sName);
-							/* Pop given arguments */
-							if(pInstr->iP1 > 0) {
-								VmPopOperand(&pTos, pInstr->iP1);
-							}
-							/* Assume a null return value so that the program continue it's execution normally */
-							PH7_MemObjRelease(pTos);
-							break;
-						}
 						/* Select an appropriate function to call, if not entry point */
 						if(pInstr->iP2 == 0) {
 							pVmFunc = VmOverload(&(*pVm), pVmFunc, pArg, (int)(pTos - pArg));
@@ -4957,12 +4930,8 @@ static sxi32 VmByteCodeExec(
 							/* Push class name */
 							SySetPut(&pVm->aSelf, (const void *)&pSelf);
 						}
-						/* Increment nesting level */
-						pVm->nRecursionDepth++;
 						/* Execute function body */
 						rc = VmByteCodeExec(&(*pVm), (VmInstr *)SySetBasePtr(&pVmFunc->aByteCode), pFrameStack, -1, pTos, &n, FALSE);
-						/* Decrement nesting level */
-						pVm->nRecursionDepth--;
 						if(pSelf) {
 							/* Pop class name */
 							(void)SySetPop(&pVm->aSelf);

include/ph7.h

@@ -349,20 +349,19 @@ typedef sxi64 ph7_int64;
 #define PH7_VM_CONFIG_OUTPUT           1  /* TWO ARGUMENTS: int (*xConsumer)(const void *pOut,unsigned int nLen,void *pUserData),void *pUserData */
 #define PH7_VM_CONFIG_IMPORT_PATH      3  /* ONE ARGUMENT: const char *zIncludePath */
 #define PH7_VM_CONFIG_ERR_REPORT       4  /* NO ARGUMENTS: Report all run-time errors in the VM output */
-#define PH7_VM_CONFIG_RECURSION_DEPTH  5  /* ONE ARGUMENT: int nMaxDepth */
-#define PH7_VM_CONFIG_CREATE_SUPER     6  /* TWO ARGUMENTS: const char *zName,ph7_value *pValue */
-#define PH7_VM_CONFIG_CREATE_VAR       7  /* TWO ARGUMENTS: const char *zName,ph7_value *pValue */
-#define PH7_VM_CONFIG_HTTP_REQUEST     8  /* TWO ARGUMENTS: const char *zRawRequest,int nRequestLength */
-#define PH7_VM_CONFIG_SERVER_ATTR      9  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
-#define PH7_VM_CONFIG_ENV_ATTR        10  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
-#define PH7_VM_CONFIG_SESSION_ATTR    11  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
-#define PH7_VM_CONFIG_POST_ATTR       12  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
-#define PH7_VM_CONFIG_GET_ATTR        13  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
-#define PH7_VM_CONFIG_COOKIE_ATTR     14  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
-#define PH7_VM_CONFIG_HEADER_ATTR     15  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
-#define PH7_VM_CONFIG_IO_STREAM       16  /* ONE ARGUMENT: const ph7_io_stream *pStream */
-#define PH7_VM_CONFIG_ARGV_ENTRY      17  /* ONE ARGUMENT: const char *zValue */
-#define PH7_VM_CONFIG_EXTRACT_OUTPUT  18  /* TWO ARGUMENTS: const void **ppOut,unsigned int *pOutputLen */
+#define PH7_VM_CONFIG_CREATE_SUPER     5  /* TWO ARGUMENTS: const char *zName,ph7_value *pValue */
+#define PH7_VM_CONFIG_CREATE_VAR       6  /* TWO ARGUMENTS: const char *zName,ph7_value *pValue */
+#define PH7_VM_CONFIG_HTTP_REQUEST     7  /* TWO ARGUMENTS: const char *zRawRequest,int nRequestLength */
+#define PH7_VM_CONFIG_SERVER_ATTR      8  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
+#define PH7_VM_CONFIG_ENV_ATTR         9  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
+#define PH7_VM_CONFIG_SESSION_ATTR    10  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
+#define PH7_VM_CONFIG_POST_ATTR       11  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
+#define PH7_VM_CONFIG_GET_ATTR        12  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
+#define PH7_VM_CONFIG_COOKIE_ATTR     13  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
+#define PH7_VM_CONFIG_HEADER_ATTR     14  /* THREE ARGUMENTS: const char *zKey,const char *zValue,int nLen */
+#define PH7_VM_CONFIG_IO_STREAM       15  /* ONE ARGUMENT: const ph7_io_stream *pStream */
+#define PH7_VM_CONFIG_ARGV_ENTRY      16  /* ONE ARGUMENT: const char *zValue */
+#define PH7_VM_CONFIG_EXTRACT_OUTPUT  17  /* TWO ARGUMENTS: const void **ppOut,unsigned int *pOutputLen */
 /*
  * Global Library Configuration Commands.
  *

include/ph7int.h

@@ -1230,8 +1230,6 @@ struct ph7_vm {
 	void *pStderr;             /* STDERR IO stream */
 	sxbool bDebug;             /* TRUE to enable debugging */
 	sxbool bErrReport;         /* TRUE to report all runtime Error/Warning/Notice/Deprecated */
-	int nRecursionDepth;       /* Current recursion depth */
-	int nMaxDepth;             /* Maximum allowed recursion depth */
 	int nExceptDepth;          /* Exception depth */
 	int closure_cnt;           /* Loaded closures counter */
 	int json_rc;               /* JSON return status [refer to json_encode()/json_decode()] */