4bc1899b2e
This patch adds support for associating a "diagnostic_path" with a
diagnostic: a sequence of events predicted by the compiler that leads to
the problem occurring, with their locations in the user's source,
text descriptions, and stack information (for handling interprocedural
paths).
For example, the following (hypothetical) error has a 3-event
intraprocedural path:
test.c: In function 'demo':
test.c:29:5: error: passing NULL as argument 1 to 'PyList_Append' which
requires a non-NULL parameter
29 | PyList_Append(list, item);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
'demo': events 1-3
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| 25 | list = PyList_New(0);
| | ^~~~~~~~~~~~~
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| | (1) when 'PyList_New' fails, returning NULL
| 26 |
| 27 | for (i = 0; i < count; i++) {
| | ~~~
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| | (2) when 'i < count'
| 28 | item = PyLong_FromLong(random());
| 29 | PyList_Append(list, item);
| | ~~~~~~~~~~~~~~~~~~~~~~~~~
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| | (3) when calling 'PyList_Append', passing NULL from (1) as argument 1
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The patch adds a new "%@" format code for printing event IDs, so that
in the above, the description of event (3) mentions event (1), showing
the user where the bogus NULL value comes from (the event IDs are
colorized to draw the user's attention to them).
There is a separation between data vs presentation: the above shows how
the diagnostic-printing code has consolidated the path into a single run
of events, since all the events are near each other and within the same
function; more complicated examples (such as interprocedural paths)
might be printed as multiple runs of events.
Examples of how interprocedural paths are printed can be seen in the
test suite (which uses a plugin to exercise the code without relying
on specific warnings using this functionality).
Other output formats include
- JSON,
- printing each event as a separate "note", and
- to not emit paths.
gcc/ChangeLog:
* Makefile.in (OBJS): Add tree-diagnostic-path.o.
* common.opt (fdiagnostics-path-format=): New option.
(diagnostic_path_format): New enum.
(fdiagnostics-show-path-depths): New option.
* coretypes.h (diagnostic_event_id_t): New forward decl.
* diagnostic-color.c (color_dict): Add "path".
* diagnostic-event-id.h: New file.
* diagnostic-format-json.cc (json_from_expanded_location): Make
non-static.
(json_end_diagnostic): Call context->make_json_for_path if it
exists and the diagnostic has a path.
(diagnostic_output_format_init): Clear context->print_path.
* diagnostic-path.h: New file.
* diagnostic-show-locus.c (colorizer::set_range): Special-case
when printing a run of events in a diagnostic_path so that they
all get the same color.
(layout::m_diagnostic_path_p): New field.
(layout::layout): Initialize it.
(layout::print_any_labels): Don't colorize the label text for an
event in a diagnostic_path.
(gcc_rich_location::add_location_if_nearby): Add
"restrict_to_current_line_spans" and "label" params. Pass the
former to layout.maybe_add_location_range; pass the latter
when calling add_range.
* diagnostic.c: Include "diagnostic-path.h".
(diagnostic_initialize): Initialize context->path_format and
context->show_path_depths.
(diagnostic_show_any_path): New function.
(diagnostic_path::interprocedural_p): New function.
(diagnostic_report_diagnostic): Call diagnostic_show_any_path.
(simple_diagnostic_path::num_events): New function.
(simple_diagnostic_path::get_event): New function.
(simple_diagnostic_path::add_event): New function.
(simple_diagnostic_event::simple_diagnostic_event): New ctor.
(simple_diagnostic_event::~simple_diagnostic_event): New dtor.
(debug): New overload taking a diagnostic_path *.
* diagnostic.def (DK_DIAGNOSTIC_PATH): New.
* diagnostic.h (enum diagnostic_path_format): New enum.
(json::value): New forward decl.
(diagnostic_context::path_format): New field.
(diagnostic_context::show_path_depths): New field.
(diagnostic_context::print_path): New callback field.
(diagnostic_context::make_json_for_path): New callback field.
(diagnostic_show_any_path): New decl.
(json_from_expanded_location): New decl.
* doc/invoke.texi (-fdiagnostics-path-format=): New option.
(-fdiagnostics-show-path-depths): New option.
(-fdiagnostics-color): Add "path" to description of default
GCC_COLORS; describe it.
(-fdiagnostics-format=json): Document how diagnostic paths are
represented in the JSON output format.
* gcc-rich-location.h (gcc_rich_location::add_location_if_nearby):
Add optional params "restrict_to_current_line_spans" and "label".
* opts.c (common_handle_option): Handle
OPT_fdiagnostics_path_format_ and
OPT_fdiagnostics_show_path_depths.
* pretty-print.c: Include "diagnostic-event-id.h".
(pp_format): Implement "%@" format code for printing
diagnostic_event_id_t *.
(selftest::test_pp_format): Add tests for "%@".
* selftest-run-tests.c (selftest::run_tests): Call
selftest::tree_diagnostic_path_cc_tests.
* selftest.h (selftest::tree_diagnostic_path_cc_tests): New decl.
* toplev.c (general_init): Initialize global_dc->path_format and
global_dc->show_path_depths.
* tree-diagnostic-path.cc: New file.
* tree-diagnostic.c (maybe_unwind_expanded_macro_loc): Make
non-static. Drop "diagnostic" param in favor of storing the
original value of "where" and re-using it.
(virt_loc_aware_diagnostic_finalizer): Update for dropped param of
maybe_unwind_expanded_macro_loc.
(tree_diagnostics_defaults): Initialize context->print_path and
context->make_json_for_path.
* tree-diagnostic.h (default_tree_diagnostic_path_printer): New
decl.
(default_tree_make_json_for_path): New decl.
(maybe_unwind_expanded_macro_loc): New decl.
gcc/c-family/ChangeLog:
* c-format.c (local_event_ptr_node): New.
(PP_FORMAT_CHAR_TABLE): Add entry for "%@".
(init_dynamic_diag_info): Initialize local_event_ptr_node.
* c-format.h (T_EVENT_PTR): New define.
gcc/testsuite/ChangeLog:
* gcc.dg/format/gcc_diag-10.c (diagnostic_event_id_t): New
typedef.
(test_diag): Add coverage of "%@".
* gcc.dg/plugin/diagnostic-path-format-default.c: New test.
* gcc.dg/plugin/diagnostic-path-format-inline-events-1.c: New test.
* gcc.dg/plugin/diagnostic-path-format-inline-events-2.c: New test.
* gcc.dg/plugin/diagnostic-path-format-inline-events-3.c: New test.
* gcc.dg/plugin/diagnostic-path-format-none.c: New test.
* gcc.dg/plugin/diagnostic-test-paths-1.c: New test.
* gcc.dg/plugin/diagnostic-test-paths-2.c: New test.
* gcc.dg/plugin/diagnostic-test-paths-3.c: New test.
* gcc.dg/plugin/diagnostic-test-paths-4.c: New test.
* gcc.dg/plugin/diagnostic_plugin_test_paths.c: New.
* gcc.dg/plugin/plugin.exp: Add the new plugin and test cases.
libcpp/ChangeLog:
* include/line-map.h (class diagnostic_path): New forward decl.
(rich_location::get_path): New accessor.
(rich_location::set_path): New function.
(rich_location::m_path): New field.
* line-map.c (rich_location::rich_location): Initialize m_path.
From-SVN: r280142
56 lines
2.6 KiB
Modula-2
56 lines
2.6 KiB
Modula-2
/* Copyright (C) 2001-2020 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* DK_UNSPECIFIED must be first so it has a value of zero. We never
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assign this kind to an actual diagnostic, we only use this in
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variables that can hold a kind, to mean they have yet to have a
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kind specified. I.e. they're uninitialized. Within the diagnostic
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machinery, this kind also means "don't change the existing kind",
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meaning "no change is specified". */
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DEFINE_DIAGNOSTIC_KIND (DK_UNSPECIFIED, "", NULL)
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/* If a diagnostic is set to DK_IGNORED, it won't get reported at all.
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This is used by the diagnostic machinery when it wants to disable a
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diagnostic without disabling the option which causes it. */
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DEFINE_DIAGNOSTIC_KIND (DK_IGNORED, "", NULL)
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/* The remainder are real diagnostic types. */
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DEFINE_DIAGNOSTIC_KIND (DK_FATAL, "fatal error: ", "error")
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DEFINE_DIAGNOSTIC_KIND (DK_ICE, "internal compiler error: ", "error")
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DEFINE_DIAGNOSTIC_KIND (DK_ERROR, "error: ", "error")
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DEFINE_DIAGNOSTIC_KIND (DK_SORRY, "sorry, unimplemented: ", "error")
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DEFINE_DIAGNOSTIC_KIND (DK_WARNING, "warning: ", "warning")
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DEFINE_DIAGNOSTIC_KIND (DK_ANACHRONISM, "anachronism: ", "warning")
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DEFINE_DIAGNOSTIC_KIND (DK_NOTE, "note: ", "note")
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DEFINE_DIAGNOSTIC_KIND (DK_DEBUG, "debug: ", "note")
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/* For use when using the diagnostic_show_locus machinery to show
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a range of events within a path. */
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DEFINE_DIAGNOSTIC_KIND (DK_DIAGNOSTIC_PATH, "path: ", "path")
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/* These two would be re-classified as DK_WARNING or DK_ERROR, so the
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prefix does not matter. */
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DEFINE_DIAGNOSTIC_KIND (DK_PEDWARN, "pedwarn: ", NULL)
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DEFINE_DIAGNOSTIC_KIND (DK_PERMERROR, "permerror: ", NULL)
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/* This one is just for counting DK_WARNING promoted to DK_ERROR
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due to -Werror and -Werror=warning. */
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DEFINE_DIAGNOSTIC_KIND (DK_WERROR, "error: ", NULL)
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/* This is like DK_ICE, but backtrace is not printed. Used in the driver
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when reporting fatal signal in the compiler. */
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DEFINE_DIAGNOSTIC_KIND (DK_ICE_NOBT, "internal compiler error: ", "error")
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