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2004-11-10 Randolph Chung <tausq@debian.org>

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* blockframe.c (inside_entry_func): Move to .....
	* frame.c (inside_entry_func): ... here, and make static.
	(backtrace_past_entry): New flag.
	(get_prev_frame): Stop backtrace at the entry function if enabled
	by flag.  Update comments.
	(_initialize_frame): Add command to set backtrace_past_entry flag.
	* defs.h (inside_entry_func): Remove prototype.

    doc/
	* gdb.texinfo: Document set/show backtrace past-entry commands.
	Rearrange index entries for set/show backtrace past-main.
This commit is contained in:
Randolph Chung
2004-11-10 21:17:58 +00:00
parent 917c78fc59
commit 2315ffec02
6 changed files with 54 additions and 21 deletions
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35
gdb/frame.c
View File

@ -115,6 +115,7 @@ static int frame_debug;
/* Flag to indicate whether backtraces should stop at main et.al. */
static int backtrace_past_main;
static int backtrace_past_entry;
static unsigned int backtrace_limit = UINT_MAX;
static void
@ -1135,6 +1136,14 @@ inside_main_func (struct frame_info *this_frame)
return maddr == get_frame_func (this_frame);
}
/* Test whether THIS_FRAME is inside the process entry point function. */
static int
inside_entry_func (struct frame_info *this_frame)
{
return (get_frame_func (this_frame) == entry_point_address ());
}
/* Return a structure containing various interesting information about
the frame that called THIS_FRAME. Returns NULL if there is entier
no such frame or the frame fails any of a set of target-independent
@ -1212,8 +1221,6 @@ get_prev_frame (struct frame_info *this_frame)
dummy frame PCs typically land in the entry func. Don't apply
this test to the sentinel frame. Sentinel frames should always
be allowed to unwind. */
/* NOTE: cagney/2003-02-25: Don't enable until someone has found
hard evidence that this is needed. */
/* NOTE: cagney/2003-07-07: Fixed a bug in inside_main_func() -
wasn't checking for "main" in the minimal symbols. With that
fixed asm-source tests now stop in "main" instead of halting the
@ -1226,13 +1233,12 @@ get_prev_frame (struct frame_info *this_frame)
I guess) to determine the address range of the start function.
That should provide a far better stopper than the current
heuristics. */
/* NOTE: cagney/2003-07-15: Need to add a "set backtrace
beyond-entry-func" command so that this can be selectively
disabled. */
if (0
#if 0
&& backtrace_beyond_entry_func
#endif
/* NOTE: tausq/2004-10-09: this is needed if, for example, the compiler
applied tail-call optimizations to main so that a function called
from main returns directly to the caller of main. Since we don't
stop at main, we should at least stop at the entry point of the
application. */
if (!backtrace_past_entry
&& this_frame->unwind->type != DUMMY_FRAME && this_frame->level >= 0
&& inside_entry_func (this_frame))
{
@ -1530,6 +1536,17 @@ Whether backtraces should continue past \"main\" is %s.",
NULL, NULL, &set_backtrace_cmdlist,
&show_backtrace_cmdlist);
add_setshow_boolean_cmd ("past-entry", class_obscure,
&backtrace_past_entry, "\
Set whether backtraces should continue past the entry point of a program.", "\
Show whether backtraces should continue past the entry point of a program.", "\
Normally there are no callers beyond the entry point of a program, so GDB\n\
will terminate the backtrace there. Set this variable if you need to see \n\
the rest of the stack trace.", "\
Whether backtraces should continue past the entry point is %s.",
NULL, NULL, &set_backtrace_cmdlist,
&show_backtrace_cmdlist);
add_setshow_uinteger_cmd ("limit", class_obscure,
&backtrace_limit, "\
Set an upper bound on the number of backtrace levels.", "\