gdb/gdb-6.3-bt-past-zero-20051201.patch

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2005-12-01 Jeff Johnston <jjohnstn@redhat.com>
* frame.c (backtrace_past_zero_pc): New static variable.
(get_prev_frame): Don't return NULL for zero pc value if
backtrace past-zero-frame option is turned on.
(_initialize_frame): Initialize new command to allow backtracing
past a zero pc value (set backtrace past-zero-pc).
testsuite/gdb.base:
2005-12-01 Jeff Johnston <jjohnstn@redhat.com>
* setshow.exp: Add testing of "set backtrace past-zero-pc" option.
Index: gdb-6.5/gdb/testsuite/gdb.base/setshow.exp
===================================================================
--- gdb-6.5.orig/gdb/testsuite/gdb.base/setshow.exp 2006-07-11 02:46:50.000000000 -0300
+++ gdb-6.5/gdb/testsuite/gdb.base/setshow.exp 2006-07-11 02:47:24.000000000 -0300
@@ -1,4 +1,4 @@
-# Copyright 1992, 1994, 1996, 1997, 1998, 2001, 2003
+# Copyright 1992, 1994, 1996, 1997, 1998, 2001, 2003, 2005
# Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
@@ -106,6 +106,16 @@ if { ![target_info exists use_gdb_stub]
delete_breakpoints
gdb_test "run" "Starting program:.*foo bar blup baz bubble.*" "passing args"
}
+#test show backtrace past-zero-pc
+gdb_test "show backtrace past-zero-pc" "Whether backtraces should continue past a zero pc value is off." "default show backtrace past-zero-pc (off)"
+#test set backtrace past-zero-pc on
+gdb_test "set backtrace past-zero-pc on" "" "set backtrace past-zero-pc on"
+#test show backtrace past-zero-pc
+gdb_test "show backtrace past-zero-pc" "Whether backtraces should continue past a zero pc value is on." "show backtrace past-zero-pc (on)"
+#test set backtrace past-zero-pc off
+gdb_test "set backtrace past-zero-pc off" "" "set backtrace past-zero-pc off"
+#test show backtrace past-zero-pc
+gdb_test "show backtrace past-zero-pc" "Whether backtraces should continue past a zero pc value is off." "show backtrace past-zero-pc (off)"
#test set check range on
gdb_test "set check range on" "" "set check range on"
#test show check range on
Index: gdb-6.5/gdb/frame.c
===================================================================
--- gdb-6.5.orig/gdb/frame.c 2006-07-11 02:46:50.000000000 -0300
+++ gdb-6.5/gdb/frame.c 2006-07-11 02:51:20.000000000 -0300
@@ -131,6 +131,16 @@ Whether backtraces should continue past
value);
}
+static int backtrace_past_zero_pc;
+static void
+show_backtrace_past_zero_pc (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("\
+Whether backtraces should continue past a zero pc value is %s.\n"),
+ value);
+}
+
static int backtrace_past_entry;
static void
show_backtrace_past_entry (struct ui_file *file, int from_tty,
@@ -1313,9 +1323,7 @@ get_prev_frame (struct frame_info *this_
}
if (this_frame->level > 0
-#if 0
- && backtrace_past_zero_pc
-#endif
+ && !backtrace_past_zero_pc
&& get_frame_type (this_frame) == NORMAL_FRAME
&& get_frame_type (get_next_frame (this_frame)) == NORMAL_FRAME
&& get_frame_pc (this_frame) == 0)
@@ -1629,6 +1637,17 @@ the rest of the stack trace."),
&set_backtrace_cmdlist,
&show_backtrace_cmdlist);
+ add_setshow_boolean_cmd ("past-zero-pc", class_obscure,
+ &backtrace_past_zero_pc, _("\
+Set whether backtraces should continue past a zero pc value."), _("\
+Show whether backtraces should continue past a zero pc value."), _("\
+Normally GDB stops backtracing when it finds a zero pc.\n\
+Set this variable if you need to see the rest of the stack trace."),
+ NULL,
+ show_backtrace_past_zero_pc,
+ &set_backtrace_cmdlist,
+ &show_backtrace_cmdlist);
+
add_setshow_integer_cmd ("limit", class_obscure,
&backtrace_limit, _("\
Set an upper bound on the number of backtrace levels."), _("\