GCC Middle and Back End API Reference
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#include <stdarg.h>
#include <stdio.h>
Go to the source code of this file.
Macros | |
#define | LIBGDIAGNOSTICS_GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__) |
#define | LIBGDIAGNOSTICS_PARAM_MUST_BE_NON_NULL(ARG_NUM) |
#define | LIBGDIAGNOSTICS_PARAM_CAN_BE_NULL(ARG_NUM) |
#define | LIBGDIAGNOSTICS_PARAM_GCC_FORMAT_STRING(FMT_ARG_NUM, ARGS_ARG_NUM) |
#define | LIBDIAGNOSTICS_HAVE_LOGICAL_LOCATION_ACCESSORS |
Typedefs | |
typedef struct diagnostic_manager | diagnostic_manager |
typedef struct diagnostic_text_sink | diagnostic_text_sink |
typedef struct diagnostic_file | diagnostic_file |
typedef struct diagnostic_physical_location | diagnostic_physical_location |
typedef unsigned int | diagnostic_line_num_t |
typedef unsigned int | diagnostic_column_num_t |
typedef struct diagnostic_logical_location | diagnostic_logical_location |
typedef struct diagnostic | diagnostic |
typedef struct diagnostic_execution_path | diagnostic_execution_path |
typedef int | diagnostic_event_id |
#define LIBDIAGNOSTICS_HAVE_LOGICAL_LOCATION_ACCESSORS |
Accessors for logical locations (added in LIBGDIAGNOSTICS_ABI_1; you can test for their presence using #ifdef LIBDIAGNOSTICS_HAVE_LOGICAL_LOCATION_ACCESSORS
#define LIBGDIAGNOSTICS_GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__) |
A pure C API for emitting diagnostics. Copyright (C) 2023-2025 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>.
This macro simplifies testing whether we are using gcc, and if it is of a particular minimum version. (Both major & minor numbers are significant.) This macro will evaluate to 0 if we are not using gcc at all.
#define LIBGDIAGNOSTICS_PARAM_CAN_BE_NULL | ( | ARG_NUM | ) |
#define LIBGDIAGNOSTICS_PARAM_GCC_FORMAT_STRING | ( | FMT_ARG_NUM, | |
ARGS_ARG_NUM ) |
Referenced by diagnostic_execution_path_add_event(), diagnostic_execution_path_add_event_va(), diagnostic_finish(), and diagnostic_finish_va().
#define LIBGDIAGNOSTICS_PARAM_MUST_BE_NON_NULL | ( | ARG_NUM | ) |
typedef struct diagnostic diagnostic |
A "diagnostic" is an opaque bundle of state for a particular diagnostic that is being constructed in memory. A diagnostic has a primary location and zero or more secondary locations. For example: | a = (foo && bar) | ~~~~~^~~~~~~ This diagnostic has a single diagnostic_location, with the caret at the first "&", and the start/finish at the parentheses. Contrast with: | a = (foo && bar) | ~~~ ^~ ~~~ This diagnostic has three locations - The primary location (at "&&") has its caret and start location at the first "&" and end at the second "&. - The secondary location for "foo" has its start and finish at the "f" and "o" of "foo"; the caret is not flagged for display, but is perhaps at the "f" of "foo". - Similarly, the other secondary location (for "bar") has its start and finish at the "b" and "r" of "bar"; the caret is not flagged for display, but is perhaps at the"b" of "bar".
typedef unsigned int diagnostic_column_num_t |
typedef int diagnostic_event_id |
typedef struct diagnostic_execution_path diagnostic_execution_path |
Types for working with execution paths.
typedef struct diagnostic_file diagnostic_file |
Types relating to "physical" source locations i.e. locations within specific files expressed via line/column.
Opaque type describing a particular input file.
typedef unsigned int diagnostic_line_num_t |
Types for storing line and column information in text files. Both libgdiagnostics and emacs number source *lines* starting at 1, but they have differing conventions for *columns*. libgdiagnostics uses a 1-based convention for source columns, whereas Emacs's M-x column-number-mode uses a 0-based convention. For example, an error in the initial, left-hand column of source line 3 is reported by libgdiagnostics as: some-file.c:3:1: error: ...etc... On navigating to the location of that error in Emacs (e.g. via "next-error"), the locus is reported in the Mode Line (assuming M-x column-number-mode) as: some-file.c 10% (3, 0) i.e. "3:1:" in libgdiagnostics corresponds to "(3, 0)" in Emacs.
typedef struct diagnostic_logical_location diagnostic_logical_location |
An opaque type describing a "logical" source location e.g. "within function 'foo'".
typedef struct diagnostic_manager diagnostic_manager |
An opaque bundle of state for a client of the library. Has zero of more "sinks" to which diagnostics are emitted. Responsibilities: - location-management - caching of source file content - patch generation.
typedef struct diagnostic_physical_location diagnostic_physical_location |
Opaque type representing a key into a database of source locations within a diagnostic_manager. Locations are created by various API calls into the diagnostic_manager expressing source code points and ranges. They persist until the diagnostic_manager is released, which cleans them up. NULL means "UNKNOWN", and can be returned by the manager as a fallback when a problem occurs (e.g. too many locations). A diagnostic_location can be a single point within the source code, such as here (at the the '"' at the start of the string literal): | int i = "foo"; | ^ or be a range with a start and finish, and a "caret" location. | a = (foo && bar) | ~~~~~^~~~~~~ where the caret here is at the first "&", and the start and finish are at the parentheses.
typedef struct diagnostic_text_sink diagnostic_text_sink |
Types relating to diagnostic output sinks.
enum diagnostic_colorize |
enum diagnostic_level |
An enum for discriminating between different kinds of logical location for a diagnostic. Roughly corresponds to logicalLocation's "kind" property in SARIF v2.1.0 (section 3.33.7).
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Create and borrow a pointer to an execution path for DIAG. The path is automatically cleaned up when DIAG is finished.
Public entrypoint.
References diagnostic::add_execution_path(), and FAIL_IF_NULL.
Referenced by diagnostic_set_location_with_label().
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Public entrypoint.
References as_location_t(), diagnostic_manager::assert_valid_diagnostic_physical_location(), FAIL_IF_NULL, diagnostic::get_manager(), diagnostic::get_rich_location(), and diagnostic_manager::set_line_table_global().
Referenced by libgdiagnostics::diagnostic::add_fix_it_hint_delete(), and diagnostic_set_location_with_label().
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Public entrypoint.
References as_location_t(), diagnostic_manager::assert_valid_diagnostic_physical_location(), FAIL_IF_NULL, diagnostic::get_manager(), diagnostic::get_rich_location(), and diagnostic_manager::set_line_table_global().
Referenced by libgdiagnostics::diagnostic::add_fix_it_hint_insert_after(), and diagnostic_set_location_with_label().
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Fix-it hints.
Public entrypoint.
References as_location_t(), diagnostic_manager::assert_valid_diagnostic_physical_location(), FAIL_IF_NULL, diagnostic::get_manager(), diagnostic::get_rich_location(), and diagnostic_manager::set_line_table_global().
Referenced by libgdiagnostics::diagnostic::add_fix_it_hint_insert_before(), and diagnostic_set_location_with_label().
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Public entrypoint.
References as_location_t(), diagnostic_manager::assert_valid_diagnostic_physical_location(), FAIL_IF_NULL, diagnostic::get_manager(), diagnostic::get_rich_location(), and diagnostic_manager::set_line_table_global().
Referenced by libgdiagnostics::diagnostic::add_fix_it_hint_replace(), and diagnostic_set_location_with_label().
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Add a secondary location to DIAG.
Public entrypoint.
References diagnostic::add_location(), diagnostic_manager::assert_valid_diagnostic_physical_location(), FAIL_IF_NULL, and diagnostic::get_manager().
Referenced by libgdiagnostics::diagnostic::add_location(), and diagnostic_set_location_with_label().
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Add a secondary location to DIAG, with a label.
Public entrypoint.
References diagnostic::add_location_with_label(), diagnostic_manager::assert_valid_diagnostic_physical_location(), FAIL_IF_NULL, diagnostic::get_manager(), and text.
Referenced by libgdiagnostics::diagnostic::add_location_with_label(), and diagnostic_set_location_with_label().
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Associate this diagnostic with a particular rule that has been violated (such as in a coding standard, or within a specification). The rule must have at least one of a title and a URL, but these can be NULL. A diagnostic can be associated with zero or more rules.
Public entrypoint.
References diagnostic::add_rule(), and FAIL_IF_NULL.
Referenced by libgdiagnostics::diagnostic::add_rule().
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Step-by-step creation of a diagnostic.
Public entrypoint.
References FAIL_IF_NULL.
Referenced by libgdiagnostics::manager::begin_diagnostic().
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Append an event to the end of PATH.
References diagnostic_execution_path_add_event(), LIBGDIAGNOSTICS_PARAM_CAN_BE_NULL, LIBGDIAGNOSTICS_PARAM_GCC_FORMAT_STRING, LIBGDIAGNOSTICS_PARAM_MUST_BE_NON_NULL, and path.
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Append an event to the end of PATH.
References diagnostic_execution_path_add_event_va(), LIBGDIAGNOSTICS_PARAM_CAN_BE_NULL, LIBGDIAGNOSTICS_PARAM_GCC_FORMAT_STRING, LIBGDIAGNOSTICS_PARAM_MUST_BE_NON_NULL, and path.
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Release ownership of PATH, which must not have been taken by a diagnostic.
Public entrypoint.
References path.
Referenced by diagnostic_set_location_with_label(), and libgdiagnostics::execution_path::~execution_path().
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Populate the source-quoting cache for FILE, specifying the given buffer as the content of the file (rather than attempting to read the content from the filesystem).
Public entrypoint.
References FAIL_IF_NULL, and diagnostic_file::set_buffered_content().
Referenced by libgdiagnostics::file::set_buffered_content().
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Emit DIAG to all sinks of its manager, and release DIAG. Use FMT for the message. Note that this uses gcc's pretty-print format, which is *not* printf. TODO: who is responsible for putting FMT through gettext?
References diagnostic_finish(), LIBGDIAGNOSTICS_PARAM_GCC_FORMAT_STRING, and LIBGDIAGNOSTICS_PARAM_MUST_BE_NON_NULL.
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As diagnostic_finish, but with a va_list.
References diagnostic_finish_va(), diagnostic_physical_location_get_file(), LIBGDIAGNOSTICS_PARAM_CAN_BE_NULL, LIBGDIAGNOSTICS_PARAM_GCC_FORMAT_STRING, and LIBGDIAGNOSTICS_PARAM_MUST_BE_NON_NULL.
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References FAIL_IF_NULL, owned_nullable_string::get_str(), and diagnostic_logical_location::m_decorated_name.
Referenced by libgdiagnostics::logical_location::get_decorated_name().
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Public entrypoints for accessing logical location data.
References FAIL_IF_NULL, and diagnostic_logical_location::m_kind.
Referenced by libgdiagnostics::logical_location::get_kind().
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References FAIL_IF_NULL, and diagnostic_logical_location::m_parent.
Referenced by libgdiagnostics::logical_location::get_parent().
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References FAIL_IF_NULL, owned_nullable_string::get_str(), and diagnostic_logical_location::m_short_name.
Referenced by libgdiagnostics::logical_location::get_short_name().
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Add a new output sink to DIAG_MGR, which writes SARIF of the given version to DST_STREAM. The output is not written until DIAG_MGR is released. DST_STREAM is borrowed, and must outlive DIAG_MGR. For the result to be a valid SARIF file according to the schema, DIAG_MGR must have had diagnostic_manager_set_tool_name called on it.
Public entrypoint.
References abort, diagnostic_manager::add_sink(), DIAGNOSTIC_SARIF_VERSION_2_1_0, DIAGNOSTIC_SARIF_VERSION_2_2_PRERELEASE, FAIL_IF_NULL, sarif_generation_options::m_version, v2_1_0, and v2_2_prerelease_2024_08_08.
Referenced by libgdiagnostics::manager::add_sarif_sink().
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Destinations for diagnostics.
Add a new output sink to DIAG_MGR, which writes GCC-style diagnostics to DST_STREAM. Return a borrowed pointer to the sink, which is cleaned up when DIAG_MGR is released. DST_STREAM is borrowed, and must outlive DIAG_MGR. The output for each diagnostic is written and flushed as each diagnostic is finished.
Public entrypoint.
References diagnostic_manager::add_sink(), and FAIL_IF_NULL.
Referenced by libgdiagnostics::manager::add_text_sink().
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Diagnostic groups.
Begin a diagnostic group. All diagnostics emitted within DIAG_MGR after the first one will be treated as notes about the initial diagnostic.
Public entrypoint.
References diagnostic_manager::begin_group(), and FAIL_IF_NULL.
Referenced by libgdiagnostics::group::group().
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Write a representation of FILE to OUT, for debugging.
References FAIL_IF_NULL, diagnostic_file::get_content(), diagnostic_file::get_name(), and diagnostic_file::get_sarif_source_language().
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Write a representation of LOC to OUT, for debugging.
Public entrypoint.
References as_location_t(), diagnostic_finish(), diagnostic_initialize(), expand_location(), FAIL_IF_NULL, diagnostic_text_output_format::get_location_text(), diagnostic_context::m_show_column, and diagnostic_manager::set_line_table_global().
Referenced by libgdiagnostics::manager::debug_dump().
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Write a representation of LOC to OUT, for debugging.
References DIAGNOSTIC_LOGICAL_LOCATION_KIND_ARRAY, DIAGNOSTIC_LOGICAL_LOCATION_KIND_ATTRIBUTE, DIAGNOSTIC_LOGICAL_LOCATION_KIND_COMMENT, DIAGNOSTIC_LOGICAL_LOCATION_KIND_DECLARATION, DIAGNOSTIC_LOGICAL_LOCATION_KIND_DTD, DIAGNOSTIC_LOGICAL_LOCATION_KIND_ELEMENT, DIAGNOSTIC_LOGICAL_LOCATION_KIND_FUNCTION, DIAGNOSTIC_LOGICAL_LOCATION_KIND_MEMBER, DIAGNOSTIC_LOGICAL_LOCATION_KIND_MODULE, DIAGNOSTIC_LOGICAL_LOCATION_KIND_NAMESPACE, DIAGNOSTIC_LOGICAL_LOCATION_KIND_OBJECT, DIAGNOSTIC_LOGICAL_LOCATION_KIND_PARAMETER, DIAGNOSTIC_LOGICAL_LOCATION_KIND_PROCESSING_INSTRUCTION, DIAGNOSTIC_LOGICAL_LOCATION_KIND_PROPERTY, DIAGNOSTIC_LOGICAL_LOCATION_KIND_RETURN_TYPE, DIAGNOSTIC_LOGICAL_LOCATION_KIND_TEXT, DIAGNOSTIC_LOGICAL_LOCATION_KIND_TYPE, DIAGNOSTIC_LOGICAL_LOCATION_KIND_VALUE, DIAGNOSTIC_LOGICAL_LOCATION_KIND_VARIABLE, diagnostic_manager_debug_dump_logical_location(), FAIL_IF_NULL, gcc_unreachable, owned_nullable_string::get_str(), diagnostic_logical_location::m_decorated_name, diagnostic_logical_location::m_fully_qualified_name, diagnostic_logical_location::m_kind, diagnostic_logical_location::m_parent, and diagnostic_logical_location::m_short_name.
Referenced by libgdiagnostics::manager::debug_dump(), and diagnostic_manager_debug_dump_logical_location().
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Finish a diagnostic group.
Public entrypoint.
References diagnostic_manager::end_group(), and FAIL_IF_NULL.
Referenced by libgdiagnostics::group::~group().
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Create a new diagnostic_manager. The client needs to call diagnostic_release_manager on it at some point. Note that no output sinks are created by default.
Public entrypoints.
Public entrypoint for clients to acquire a diagnostic_manager.
Referenced by libgdiagnostics::manager::manager().
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Create a new execution path. This is owned by the called and must have either diagnostic_take_execution_path or diagnostic_execution_path_release called on it.
Public entrypoint.
References FAIL_IF_NULL, and diagnostic_manager::new_execution_path().
Referenced by diagnostic_set_location_with_label(), and libgdiagnostics::manager::new_execution_path().
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Location management.
Create a new diagnostic_file * for file NAME. Repeated calls with matching NAMEs will return the same object. If SARIF_SOURCE_LANGUAGE is non-NULL, it specifies a "sourceLanguage" value for the file when use when writing SARIF. See SARIF v2.1.0 Appendix J for suggested values for various programmming languages.
Public entrypoint.
References FAIL_IF_NULL, and diagnostic_manager::new_file().
Referenced by libgdiagnostics::manager::new_file().
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Attempt to create a diagnostic_location representing FILENAME:LINE_NUM, with no column information (thus "the whole line").
Public entrypoint.
References FAIL_IF_NULL, and diagnostic_manager::new_location_from_file_and_line().
Referenced by libgdiagnostics::manager::new_location_from_file_and_line().
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Attempt to create a diagnostic_physical_location representing FILENAME:LINE_NUM:COLUMN_NUM.
Public entrypoint.
References FAIL_IF_NULL, and diagnostic_manager::new_location_from_file_line_column().
Referenced by libgdiagnostics::manager::new_location_from_file_line_column().
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Attempt to create a diagnostic_physical_location representing a range within a source file, with a highlighted "caret" location. All must be within the same file, but they can be on different lines. For example, consider the location of the binary expression below: ...|__________1111111112222222 ...|12345678901234567890123456 ...| 521|int sum (int foo, int bar) 522|{ 523| return foo + bar; ...| ~~~~^~~~~ 524|} The location's caret is at the "+", line 523 column 15, but starts earlier, at the "f" of "foo" at column 11. The finish is at the "r" of "bar" at column 19.
Public entrypoint.
References FAIL_IF_NULL, and diagnostic_manager::new_location_from_range().
Referenced by libgdiagnostics::manager::new_location_from_range().
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A bundle of state describing a logical location in the user's source, such as "in function 'foo'". SHORT_NAME can be NULL, or else a string suitable for use by the SARIF logicalLocation "name" property (SARIF v2.1.0 section 3.33.4). FULLY_QUALIFIED_NAME can be NULL or else a string suitable for use by the SARIF logicalLocation "fullyQualifiedName" property (SARIF v2.1.0 section 3.33.5). DECORATED_NAME can be NULL or else a string suitable for use by the SARIF logicalLocation "decoratedName" property (SARIF v2.1.0 section 3.33.6).
Public entrypoint.
References FAIL_IF_NULL, and diagnostic_manager::new_logical_location().
Referenced by libgdiagnostics::manager::new_logical_location().
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Release a diagnostic_manager. This will flush output to all of the output sinks, and clean up.
Public entrypoint for clients to release a diagnostic_manager.
Referenced by libgdiagnostics::manager::~manager().
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Set a string suitable for use as the value of the SARIF "fullName" property (SARIF v2.1.0 section 3.19.9).
Public entrypoint.
References FAIL_IF_NULL, diagnostic_manager::get_client_version_info(), and value.
Referenced by libgdiagnostics::manager::set_full_name().
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Optional metadata about the manager.
Set a string suitable for use as the value of the SARIF "name" property (SARIF v2.1.0 section 3.19.8).
Public entrypoint.
References FAIL_IF_NULL, diagnostic_manager::get_client_version_info(), and value.
Referenced by libgdiagnostics::manager::set_tool_name().
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Set a string suitable for use as the value of the SARIF "version" property (SARIF v2.1.0 section 3.19.13).
Public entrypoint.
References FAIL_IF_NULL, diagnostic_manager::get_client_version_info(), and value.
Referenced by libgdiagnostics::manager::set_version_string().
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Set a string suitable for use as the value of the SARIF "informationUri" property (SARIF v2.1.0 section 3.19.17).
Public entrypoint.
References FAIL_IF_NULL, diagnostic_manager::get_client_version_info(), and value.
Referenced by libgdiagnostics::manager::set_version_url().
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Write a patch to DST_STREAM consisting of all fix-it hints on all diagnostics that have been finished on DIAG_MGR.
Public entrypoint.
References FAIL_IF_NULL, and diagnostic_manager::write_patch().
Referenced by libgdiagnostics::manager::write_patch().
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Get the diagnostic_file associated with PHYSICAL_LOC.
Public entrypoint.
References diagnostic_physical_location::get_file().
Referenced by diagnostic_finish_va(), and libgdiagnostics::physical_location::get_file().
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Associate this diagnostic with the given ID within the Common Weakness Enumeration.
Public entrypoint.
References FAIL_IF_NULL, and diagnostic::set_cwe().
Referenced by libgdiagnostics::diagnostic::set_cwe().
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Set the primary location of DIAG.
Public entrypoint.
References diagnostic_manager::assert_valid_diagnostic_physical_location(), FAIL_IF_NULL, diagnostic::get_manager(), and diagnostic::set_location().
Referenced by libgdiagnostics::diagnostic::set_location().
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Set the primary location of DIAG, with a label.
References diagnostic_add_execution_path(), diagnostic_add_fix_it_hint_delete(), diagnostic_add_fix_it_hint_insert_after(), diagnostic_add_fix_it_hint_insert_before(), diagnostic_add_fix_it_hint_replace(), diagnostic_add_location(), diagnostic_add_location_with_label(), diagnostic_execution_path_release(), diagnostic_manager_new_execution_path(), diagnostic_set_location_with_label(), diagnostic_set_logical_location(), diagnostic_take_execution_path(), LIBGDIAGNOSTICS_PARAM_CAN_BE_NULL, LIBGDIAGNOSTICS_PARAM_MUST_BE_NON_NULL, path, and text.
Referenced by diagnostic_set_location_with_label().
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Set the logical location of DIAG.
Public entrypoint.
References FAIL_IF_NULL, and diagnostic::set_logical_location().
Referenced by diagnostic_set_location_with_label(), and libgdiagnostics::diagnostic::set_logical_location().
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Set DIAG to use PATH as its execution path, taking ownership of PATH.
Public entrypoint.
References FAIL_IF_NULL, path, and diagnostic::take_execution_path().
Referenced by diagnostic_set_location_with_label(), and libgdiagnostics::diagnostic::take_execution_path().
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Update colorization of text sink.
Public entrypoint.
References FAIL_IF_NULL, and diagnostic_text_sink::set_colorize().
Referenced by libgdiagnostics::text_sink::set_colorize().
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Enable/disable colorization of the characters of source text that are underlined. This should be true for clients that generate range information (so that the ranges of code are colorized), and false for clients that merely specify points within the source code (to avoid e.g. colorizing just the first character in a token, which would look strange). Default: enabled.
Public entrypoint.
References diagnostic_source_printing_options::colorize_source_p, FAIL_IF_NULL, diagnostic_text_sink::get_source_printing_options(), and value.
Referenced by libgdiagnostics::text_sink::set_labelled_source_colorization_enabled().
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Functions to manipulate text sinks.
Enable/disable printing of source text in the text sink. Default: enabled.
Public entrypoint.
References diagnostic_source_printing_options::enabled, FAIL_IF_NULL, diagnostic_text_sink::get_source_printing_options(), and value.
Referenced by libgdiagnostics::text_sink::set_source_printing_enabled().