From 978d6c756fcb0332ddf12e19305dd0e53b98a93d Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Sun, 23 Apr 2017 11:03:57 -0600 Subject: [PATCH] Allow hiding of some filtered frames When a frame filter elides some frames, they are still printed by "bt", indented a few spaces. PR backtrace/15582 notes that it would be nice for users if elided frames could simply be dropped. This patch adds this capability. gdb/ChangeLog 2018-03-26 Tom Tromey PR backtrace/15582: * stack.c (backtrace_command): Parse "hide" argument. * python/py-framefilter.c (py_print_frame): Handle PRINT_HIDE. * extension.h (enum frame_filter_flags) : New constant. gdb/doc/ChangeLog 2018-03-26 Tom Tromey PR backtrace/15582: * gdb.texinfo (Backtrace): Mention "hide" argument. gdb/testsuite/ChangeLog 2018-03-26 Tom Tromey PR backtrace/15582: * gdb.python/py-framefilter.exp: Add "bt hide" test. --- gdb/ChangeLog | 8 ++++ gdb/doc/ChangeLog | 5 +++ gdb/doc/gdb.texinfo | 6 +++ gdb/extension.h | 3 ++ gdb/python/py-framefilter.c | 50 ++++++++++----------- gdb/stack.c | 2 + gdb/testsuite/ChangeLog | 5 +++ gdb/testsuite/gdb.python/py-framefilter.exp | 3 ++ 8 files changed, 57 insertions(+), 25 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index ed1d9dda62f..8f8059335c0 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,11 @@ +2018-03-26 Tom Tromey + + PR backtrace/15582: + * stack.c (backtrace_command): Parse "hide" argument. + * python/py-framefilter.c (py_print_frame): Handle PRINT_HIDE. + * extension.h (enum frame_filter_flags) : New + constant. + 2018-03-26 Tom Tromey * stack.c (backtrace_command_1): Remove "show_locals" parameter, diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog index 413e4560129..4da77deb85c 100644 --- a/gdb/doc/ChangeLog +++ b/gdb/doc/ChangeLog @@ -1,3 +1,8 @@ +2018-03-26 Tom Tromey + + PR backtrace/15582: + * gdb.texinfo (Backtrace): Mention "hide" argument. + 2018-03-26 Tom Tromey * gdb.texinfo (Backtrace): Describe options individually. diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index 28254c9e68c..d37b107a51d 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -7342,6 +7342,12 @@ Filter API}, for more information. Additionally use @ref{disable frame-filter all} to turn off all frame filters. This is only relevant when @value{GDBN} has been configured with @code{Python} support. + +@item hide +A Python frame filter might decide to ``elide'' some frames. Normally +such elided frames are still printed, but they are indented relative +to the filtered frames that cause them to be elided. The @code{hide} +option causes elided frames to not be printed at all. @end table @end table diff --git a/gdb/extension.h b/gdb/extension.h index 943792db29e..a97292875a6 100644 --- a/gdb/extension.h +++ b/gdb/extension.h @@ -103,6 +103,9 @@ enum frame_filter_flag /* Set this flag if a "More frames" message is to be printed. */ PRINT_MORE_FRAMES = 1 << 4, + + /* Set this flag if elided frames should not be printed. */ + PRINT_HIDE = 1 << 5, }; DEF_ENUM_FLAGS_TYPE (enum frame_filter_flag, frame_filter_flags); diff --git a/gdb/python/py-framefilter.c b/gdb/python/py-framefilter.c index 99d47f247a3..aae8d5decf1 100644 --- a/gdb/python/py-framefilter.c +++ b/gdb/python/py-framefilter.c @@ -1238,37 +1238,37 @@ py_print_frame (PyObject *filter, frame_filter_flags flags, return EXT_LANG_BT_ERROR; } - { - /* Finally recursively print elided frames, if any. */ - gdbpy_ref<> elided (get_py_iter_from_func (filter, "elided")); - if (elided == NULL) - return EXT_LANG_BT_ERROR; + if ((flags & PRINT_HIDE) == 0) + { + /* Finally recursively print elided frames, if any. */ + gdbpy_ref<> elided (get_py_iter_from_func (filter, "elided")); + if (elided == NULL) + return EXT_LANG_BT_ERROR; - if (elided != Py_None) - { - PyObject *item; + if (elided != Py_None) + { + PyObject *item; - ui_out_emit_list inner_list_emiter (out, "children"); + ui_out_emit_list inner_list_emiter (out, "children"); - if (! out->is_mi_like_p ()) - indent++; + if (! out->is_mi_like_p ()) + indent++; - while ((item = PyIter_Next (elided.get ()))) - { - gdbpy_ref<> item_ref (item); + while ((item = PyIter_Next (elided.get ()))) + { + gdbpy_ref<> item_ref (item); - enum ext_lang_bt_status success = py_print_frame (item, flags, - args_type, out, - indent, - levels_printed); + enum ext_lang_bt_status success + = py_print_frame (item, flags, args_type, out, indent, + levels_printed); - if (success == EXT_LANG_BT_ERROR) - return EXT_LANG_BT_ERROR; - } - if (item == NULL && PyErr_Occurred ()) - return EXT_LANG_BT_ERROR; - } - } + if (success == EXT_LANG_BT_ERROR) + return EXT_LANG_BT_ERROR; + } + if (item == NULL && PyErr_Occurred ()) + return EXT_LANG_BT_ERROR; + } + } return EXT_LANG_BT_COMPLETED; } diff --git a/gdb/stack.c b/gdb/stack.c index 76695ff7e61..8e8fe12109f 100644 --- a/gdb/stack.c +++ b/gdb/stack.c @@ -1867,6 +1867,8 @@ backtrace_command (const char *arg, int from_tty) filters = false; else if (subset_compare (this_arg.c_str (), "full")) flags |= PRINT_LOCALS; + else if (subset_compare (this_arg.c_str (), "hide")) + flags |= PRINT_HIDE; else { /* Not a recognized argument, so stop. */ diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index a359571d61d..5537a9178d6 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2018-03-26 Tom Tromey + + PR backtrace/15582: + * gdb.python/py-framefilter.exp: Add "bt hide" test. + 2018-03-23 Keith Seitz PR c++/22968 diff --git a/gdb/testsuite/gdb.python/py-framefilter.exp b/gdb/testsuite/gdb.python/py-framefilter.exp index 7e02e9d701b..cc31dd5893e 100644 --- a/gdb/testsuite/gdb.python/py-framefilter.exp +++ b/gdb/testsuite/gdb.python/py-framefilter.exp @@ -157,6 +157,9 @@ gdb_test "bt no-filter full" \ gdb_test "bt full" \ ".*#0.*end_func.*str = $hex \"The End\".*st2 = $hex \"Is Near\".*b = 12.*c = 5.*#1.*in funca \\(\\).*#2.*in funcb \\(j=10\\).*bar = \{a = 42, b = 84\}.*#22.*in func1 \\(\\).*#23.*in func2 \\(f=3\\).*elided = $hex \"Elided frame\".*fb = \{nothing = $hex \"Elided Foo Bar\", f = 84, s = 38\}.*bf = $hex.*" \ "bt full with Reverse disabled" +gdb_test "bt full hide" \ + ".*#0.*end_func.*str = $hex \"The End\".*st2 = $hex \"Is Near\".*b = 12.*c = 5.*#1.*in funca \\(\\).*#2.*in funcb \\(j=10\\).*bar = \{a = 42, b = 84\}.*#22.*in func1 \\(\\)\[^#\]*#24.*in func3 \\(i=3\\).*" \ + "bt full hide with Reverse disabled" # Test set print frame-arguments # none -- 2.30.2