put an upper limit on the number of arguments to be printed

[unix-history] / usr / src / old / dbx / printsym.c

diff --git a/usr/src/old/dbx/printsym.c b/usr/src/old/dbx/printsym.c
index 6520acc..e9653a6 100644 (file)
--- a/usr/src/old/dbx/printsym.c
+++ b/usr/src/old/dbx/printsym.c
@@ -1,6 +1,6 @@
 /* Copyright (c) 1982 Regents of the University of California */
 
 /* Copyright (c) 1982 Regents of the University of California */
 

-static char sccsid[] = "@(#)printsym.c 1.2 %G%";
+static char sccsid[] = "@(#)printsym.c 1.3 %G%";

 
 /*
  * Printing of symbolic information.
 
 /*
  * Printing of symbolic information.


@@ -22,6 +22,15 @@ static char sccsid[] = "@(#)printsym.c 1.2 %G%";
 #ifndef public
 #endif
 
 #ifndef public
 #endif
 

+/*
+ * Maximum number of arguments to a function.
+ * This is used as a check for the possibility that the stack has been
+ * overwritten and therefore a saved argument pointer might indicate
+ * to an absurdly large number of arguments.
+ */
+
+#define MAXARGSPASSED 20
+

 /*
  * Return a pointer to the string for the name of the class that
  * the given symbol belongs to.
 /*
  * Return a pointer to the string for the name of the class that
  * the given symbol belongs to.


@@ -137,6 +146,9 @@ Frame frame;
            }
        }
        if (m > 0) {
            }
        }
        if (m > 0) {

+           if (m > MAXARGSPASSED) {
+               m = MAXARGSPASSED;
+           }

            if (f->chain != nil) {
                printf(", ");
            }
            if (f->chain != nil) {
                printf(", ");
            }


@@ -340,6 +352,11 @@ Symbol s;
        case PROC:
        case FUNC:
            printf("address\t0x%x\n", s->symvalue.funcv.beginaddr);
        case PROC:
        case FUNC:
            printf("address\t0x%x\n", s->symvalue.funcv.beginaddr);

+           if (nosource(s)) {
+               printf("does not have source information\n");
+           } else {
+               printf("has source information\n");
+           }

            break;
 
        case RANGE:
            break;
 
        case RANGE: