* c-parse.in (yyoverflow): New.

	* cp/parse.y (yyoverflow): New.
	* g++.dg/parse/stack1.C: New.
	* gcc.dg/20020425-1.c: New.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@52779 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 35 insertions, 0 deletions

diff --git a/gcc/c-parse.in b/gcc/c-parse.in
index 5835fe14e13..f3a3da8f999 100644
--- a/gcc/c-parse.in
+++ b/gcc/c-parse.in
@@ -61,6 +61,41 @@ end ifobjc
 
 /* Like YYERROR but do call yyerror.  */
 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
+
+/* Like the default stack expander, except (1) use realloc when possible,
+   and (2) impose no hard maxiumum on stack size.  */
+#define yyoverflow(MSG, SS, SSSIZE, VS, VSSIZE, YYSSZ)			\
+do {									\
+  size_t newsize;							\
+  short *newss;								\
+  YYSTYPE *newvs;							\
+  newsize = *(YYSSZ) *= 2;						\
+  if (yyfree_stacks)							\
+    {									\
+      newss = (short *)							\
+	really_call_realloc (*(SS), newsize * sizeof (short));		\
+      newvs = (YYSTYPE *)						\
+	really_call_realloc (*(VS), newsize * sizeof (YYSTYPE));	\
+    }									\
+  else									\
+    {									\
+      newss = (short *) really_call_malloc (newsize * sizeof (short));	\
+      if (newss)							\
+        memcpy (newss, *(SS), (SSSIZE));				\
+      newvs = (YYSTYPE *) really_call_malloc (newsize * sizeof (YYSTYPE)); \
+      if (newvs)							\
+        memcpy (newvs, *(VS), (VSSIZE));				\
+    }									\
+  if (!newss || !newvs)							\
+    {									\
+      yyerror (MSG);							\
+      return 2;								\
+    }									\
+  yyfree_stacks = 1;							\
+  *(SS) = newss;							\
+  *(VS) = newvs;							\
+} while (0)
+
 %}
 
 %start program