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Make 'show width/height' display "unlimited" when capped for readline 

When we cap the height/width sizes before passing to readline, tweak
the corresponding command variable to show "unlimited":

  (gdb) set height 0x8000
  (gdb) show height
  Number of lines gdb thinks are in a page is unlimited.

Instead of the current output:
  (gdb) set height 0x8000
  (gdb) show height
  Number of lines gdb thinks are in a page is 32768.

gdb/ChangeLog:
2019-02-27  Pedro Alves  <palves@redhat.com>

	* utils.c (set_screen_size): When we cap the height/width sizes,
	tweak the corresponding command variable to show "unlimited":

gdb/testsuite/ChangeLog:
2019-02-27  Pedro Alves  <palves@redhat.com>

	* gdb.base/page.exp: Add tests for "set/show width/height" with
	"infinite" values.
This commit is contained in:
Pedro Alves 2019-02-27 18:48:36 +00:00
parent 23031e3192
commit 8ed252144a
4 changed files with 42 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2019-02-27 Pedro Alves <palves@redhat.com>
* utils.c (set_screen_size): When we cap the height/width sizes,
tweak the corresponding command variable to show "unlimited":
2019-02-27 Saagar Jha <saagar@saagarjha.com>
Pedro Alves <palves@redhat.com>

5
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2019-02-27 Pedro Alves <palves@redhat.com>
* gdb.base/page.exp: Add tests for "set/show width/height" with
"infinite" values.
2019-02-27 Tom Tromey <tromey@adacore.com>
* lib/gdb.exp (skip_python_tests_prompt): Don't check for Python

24
gdb/testsuite/gdb.base/page.exp
View File

@ -94,6 +94,30 @@ gdb_expect_list "paged count for interrupt" \
gdb_test "q" "Quit" "quit while paging"
# Check that width/height of sqrt(INT_MAX) is treated as unlimited, as
# well as "0" and explicit "unlimited".
foreach_with_prefix size {"0" "0x80000000" "unlimited"} {
# Alternate between "non-unlimited" values and "unlimited" values,
# to make sure we're not seeing stale internal state.
gdb_test "set width 200"
gdb_test "show width" \
"Number of characters gdb thinks are in a line is 200\\."
gdb_test "set height 200"
gdb_test "show height" \
"Number of lines gdb thinks are in a page is 200\\."
gdb_test "set width $size"
gdb_test "show width unlimited" \
"Number of characters gdb thinks are in a line is unlimited\\."
gdb_test "set height $size"
gdb_test "show height unlimited" \
"Number of lines gdb thinks are in a page is unlimited\\."
}
gdb_exit
return 0

10
gdb/utils.c
View File

@ -1394,10 +1394,16 @@ set_screen_size (void)
const int sqrt_int_max = INT_MAX >> (sizeof (int) * 8 / 2);
if (rows <= 0 || rows > sqrt_int_max)
rows = sqrt_int_max;
{
rows = sqrt_int_max;
lines_per_page = UINT_MAX;
}
if (cols <= 0 || cols > sqrt_int_max)
cols = sqrt_int_max;
{
cols = sqrt_int_max;
chars_per_line = UINT_MAX;
}
/* Update Readline's idea of the terminal size. */
rl_set_screen_size (rows, cols);