mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
644 lines
22 KiB
C++
644 lines
22 KiB
C++
#ifndef RB_DEBUG_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RB_DEBUG_H 1
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/**
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* @file
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* @author $Author: ko1 $
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* @date Tue Nov 20 20:35:08 2012
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* @copyright Copyright (C) 2012 Yukihiro Matsumoto
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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*/
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#include "ruby/internal/attr/nonnull.h"
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#include "ruby/internal/attr/returns_nonnull.h"
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#include "ruby/internal/dllexport.h"
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#include "ruby/internal/event.h"
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#include "ruby/internal/value.h"
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RBIMPL_SYMBOL_EXPORT_BEGIN()
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/* Note: This file contains experimental APIs. */
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/* APIs can be replaced at Ruby 2.0.1 or later */
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/**
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* @name Frame-profiling APIs
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*
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* @{
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*/
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RBIMPL_ATTR_NONNULL((3))
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/**
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* Queries mysterious "frame"s of the given range.
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*
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* The returned values are opaque backtrace pointers, which you are allowed to
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* issue a very limited set of operations listed below. Don't call arbitrary
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* ruby methods.
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*
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* @param[in] start Start position (0 means the topmost).
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* @param[in] limit Number objects of `buff`.
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* @param[out] buff Return buffer.
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* @param[out] lines Return buffer.
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* @return Number of objects filled into `buff`.
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* @post `buff` is filled with backtrace pointers.
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* @post `lines` is filled with `__LINE__` of each backtraces.
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*
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* @internal
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*
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* @shyouhei doesn't like this abuse of ::VALUE. It should have been
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* `const struct rb_callable_method_entry_struct *`.
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*/
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int rb_profile_frames(int start, int limit, VALUE *buff, int *lines);
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/**
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* Queries the path of the passed backtrace.
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*
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* @param[in] frame What rb_profile_frames() returned.
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* @retval RUBY_Qnil The frame is implemented in C etc.
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* @retval otherwise Where `frame` is running.
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*/
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VALUE rb_profile_frame_path(VALUE frame);
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/**
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* Identical to rb_profile_frame_path(), except it tries to expand the
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* returning path. In case the path is `require`-d from something else
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* rb_profile_frame_path() can return relative paths. This one tries to avoid
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* that.
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*
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* @param[in] frame What rb_profile_frames() returned.
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* @retval "<cfunc>" The frame is in C.
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* @retval RUBY_Qnil Can't infer real path (inside of `eval` etc.).
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* @retval otherwise Where `frame` is running.
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*/
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VALUE rb_profile_frame_absolute_path(VALUE frame);
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/**
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* Queries human-readable "label" string. This is `"<main>"` for the toplevel,
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* `"<compiled>"` for evaluated ones, method name for methods, class name for
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* classes.
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*
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* @param[in] frame What rb_profile_frames() returned.
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* @retval RUBY_Qnil Can't infer the label (C etc.).
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* @retval "<main>" The frame is global toplevel.
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* @retval "<compiled>" The frame is dynamic.
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* @retval otherwise Label of the frame.
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*/
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VALUE rb_profile_frame_label(VALUE frame);
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/**
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* Identical to rb_profile_frame_label(), except it does not "qualify" the
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* result. Consider the following backtrace:
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*
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* ```ruby
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* def bar
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* caller_locations
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* end
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*
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* def foo
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* [1].map { bar }.first
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* end
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*
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* obj = foo.first
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* obj.label # => "block in foo"
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* obj.base_label # => "foo"
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* ```
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*
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* @param[in] frame What rb_profile_frames() returned.
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* @retval RUBY_Qnil Can't infer the label (C etc.).
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* @retval "<main>" The frame is global toplevel.
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* @retval "<compiled>" The frame is dynamic.
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* @retval otherwise Base label of the frame.
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*/
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VALUE rb_profile_frame_base_label(VALUE frame);
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/**
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* Identical to rb_profile_frame_label(), except it returns a qualified result.
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*
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* @param[in] frame What rb_profile_frames() returned.
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* @retval RUBY_Qnil Can't infer the label (C etc.).
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* @retval "<main>" The frame is global toplevel.
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* @retval "<compiled>" The frame is dynamic.
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* @retval otherwise Qualified label of the frame.
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*
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* @internal
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*
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* As of writing there is no way to obtain this return value from a Ruby
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* script. This may change in future (it took 8 years and still no progress,
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* though).
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*/
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VALUE rb_profile_frame_full_label(VALUE frame);
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/**
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* Queries the first line of the method of the passed frame pointer. Can be
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* handy when for instance a debugger want to display the frame in question.
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*
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* @param[in] frame What rb_profile_frames() returned.
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* @retval RUBY_Qnil Can't infer the line (C etc.).
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* @retval otherwise Line number of the method in question.
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*/
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VALUE rb_profile_frame_first_lineno(VALUE frame);
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/**
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* Queries the class path of the method that the passed frame represents.
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*
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* @param[in] frame What rb_profile_frames() returned.
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* @retval RUBY_Qnil Can't infer the class (global toplevel etc.).
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* @retval otherwise Class path as in rb_class_path().
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*/
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VALUE rb_profile_frame_classpath(VALUE frame);
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/**
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* Queries if the method of the passed frame is a singleton class.
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*
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* @param[in] frame What rb_profile_frames() returned.
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* @retval RUBY_Qtrue It is a singleton method.
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* @retval RUBY_Qfalse Otherwise (normal method/non-method).
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*/
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VALUE rb_profile_frame_singleton_method_p(VALUE frame);
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/**
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* Queries the name of the method of the passed frame.
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*
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* @param[in] frame What rb_profile_frames() returned.
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* @retval RUBY_Qnil The frame in question is not a method.
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* @retval otherwise Name of the method of the frame.
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*/
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VALUE rb_profile_frame_method_name(VALUE frame);
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/**
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* Identical to rb_profile_frame_method_name(), except it "qualifies" the
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* return value with its defining class.
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*
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* @param[in] frame What rb_profile_frames() returned.
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* @retval RUBY_Qnil The frame in question is not a method.
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* @retval otherwise Qualified name of the method of the frame.
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*/
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VALUE rb_profile_frame_qualified_method_name(VALUE frame);
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/** @} */
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/**
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* @name Debug inspector APIs
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*
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* @{
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*/
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/** Opaque struct representing a debug inspector. */
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typedef struct rb_debug_inspector_struct rb_debug_inspector_t;
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/**
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* Type of the callback function passed to rb_debug_inspector_open().
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* Inspection shall happen only inside of them. The passed pointers gets
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* invalidated once after the callback returns.
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*
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* @param[in] dc A debug context.
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* @param[in,out] data What was passed to rb_debug_inspector_open().
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* @return What would be the return value of rb_debug_inspector_open().
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*/
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typedef VALUE (*rb_debug_inspector_func_t)(const rb_debug_inspector_t *dc, void *data);
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/**
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* Prepares, executes, then cleans up a debug session.
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*
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* @param[in] func A callback to run inside of a debug session.
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* @param[in,out] data Passed as-is to `func`.
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* @return What was returned from `func`.
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*/
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VALUE rb_debug_inspector_open(rb_debug_inspector_func_t func, void *data);
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/**
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* Queries the current receiver of the passed context's upper frame.
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*
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* @param[in] dc A debug context.
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* @param[in] index Index of the frame from top to bottom.
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* @exception rb_eArgError `index` out of range.
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* @return The current receiver at `index`-th frame.
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*/
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VALUE rb_debug_inspector_frame_self_get(const rb_debug_inspector_t *dc, long index);
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/**
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* Queries the current class of the passed context's upper frame.
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*
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* @param[in] dc A debug context.
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* @param[in] index Index of the frame from top to bottom.
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* @exception rb_eArgError `index` out of range.
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* @return The current class at `index`-th frame.
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*/
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VALUE rb_debug_inspector_frame_class_get(const rb_debug_inspector_t *dc, long index);
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/**
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* Queries the binding of the passed context's upper frame.
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*
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* @param[in] dc A debug context.
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* @param[in] index Index of the frame from top to bottom.
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* @exception rb_eArgError `index` out of range.
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* @return The binding at `index`-th frame.
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*/
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VALUE rb_debug_inspector_frame_binding_get(const rb_debug_inspector_t *dc, long index);
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/**
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* Queries the instruction sequence of the passed context's upper frame.
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*
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* @param[in] dc A debug context.
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* @param[in] index Index of the frame from top to bottom.
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* @exception rb_eArgError `index` out of range.
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* @retval RUBY_Qnil `index`-th frame is not in Ruby (C etc.).
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* @retval otherwise An instance of `RubyVM::InstructionSequence` which
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* represents the instruction sequence at `index`-th
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* frame.
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*/
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VALUE rb_debug_inspector_frame_iseq_get(const rb_debug_inspector_t *dc, long index);
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/**
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* Queries the backtrace object of the context. This is as if you call
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* `caller_locations` at the point of debugger.
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*
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* @param[in] dc A debug context.
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* @return An array of `Thread::Backtrace::Location` which represents the
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* current point of execution at `dc`.
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*/
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VALUE rb_debug_inspector_backtrace_locations(const rb_debug_inspector_t *dc);
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/** @} */
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/**
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* @name Old style set_trace_func APIs
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*
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* @{
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*/
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/* duplicated def of include/ruby/ruby.h */
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#include "ruby/internal/event.h"
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/**
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* Identical to rb_remove_event_hook(), except it additionally takes the data
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* argument. This extra argument is the same as that of rb_add_event_hook(),
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* and this function removes the hook which matches both arguments at once.
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*
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* @param[in] func A callback.
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* @param[in] data What to be passed to `func`.
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* @return Number of deleted event hooks.
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* @note As multiple events can share the same `func` it is quite
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* possible for the return value to become more than one.
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*/
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int rb_remove_event_hook_with_data(rb_event_hook_func_t func, VALUE data);
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/**
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* Identical to rb_add_event_hook(), except its effect is limited to the passed
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* thread. Other threads are not affected by this.
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*
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* @param[in] thval An instance of ::rb_cThread.
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* @param[in] func A callback.
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* @param[in] events A set of events that `func` should run.
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* @param[in] data Passed as-is to `func`.
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* @exception rb_eTypeError `thval` is not a thread.
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*/
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void rb_thread_add_event_hook(VALUE thval, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data);
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/**
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* Identical to rb_remove_event_hook(), except it additionally takes a thread
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* argument. This extra argument is the same as that of
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* rb_thread_add_event_hook(), and this function removes the hook which matches
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* both arguments at once.
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*
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* @param[in] thval An instance of ::rb_cThread.
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* @param[in] func A callback.
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* @exception rb_eTypeError `thval` is not a thread.
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* @return Number of deleted event hooks.
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* @note As multiple events can share the same `func` it is quite
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* possible for the return value to become more than one.
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*/
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int rb_thread_remove_event_hook(VALUE thval, rb_event_hook_func_t func);
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/**
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* Identical to rb_thread_remove_event_hook(), except it additionally takes the
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* data argument. It can also be seen as a routine identical to
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* rb_remove_event_hook_with_data(), except it additionally takes the thread.
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* This function deletes hooks that satisfy all three criteria.
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*
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* @param[in] thval An instance of ::rb_cThread.
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* @param[in] func A callback.
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* @param[in] data What to be passed to `func`.
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* @exception rb_eTypeError `thval` is not a thread.
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* @return Number of deleted event hooks.
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* @note As multiple events can share the same `func` it is quite
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* possible for the return value to become more than one.
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*/
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int rb_thread_remove_event_hook_with_data(VALUE thval, rb_event_hook_func_t func, VALUE data);
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/** @} */
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/**
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* @name TracePoint APIs
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*
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* @{
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*/
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/**
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* Creates a tracepoint by registering a callback function for one or more
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* tracepoint events. Once the tracepoint is created, you can use
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* rb_tracepoint_enable to enable the tracepoint.
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*
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* @param[in] target_thread_not_supported_yet Meant for picking the
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* thread in which the tracepoint is to be created.
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* However, current implementation ignore this
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* parameter, tracepoint is created for all threads.
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* Simply specify Qnil.
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* @param[in] events Event(s) to listen to.
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* @param[in] func A callback function.
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* @param[in,out] data Void pointer that will be passed to the callback
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* function.
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*
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* When the callback function is called, it will be passed 2 parameters:
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* 1. `VALUE tpval` - the TracePoint object from which trace args can be
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* extracted.
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* 1. `void *data` - A void pointer which helps to share scope with the
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* callback function.
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*
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* It is important to note that you cannot register callbacks for normal events
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* and internal events simultaneously because they are different purpose. You
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* can use any Ruby APIs (calling methods and so on) on normal event hooks.
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* However, in internal events, you can not use any Ruby APIs (even object
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* creations). This is why we can't specify internal events by TracePoint
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* directly. Limitations are MRI version specific.
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*
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* Example:
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*
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* ```CXX
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* rb_tracepoint_new(
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* Qnil,
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* RUBY_INTERNAL_EVENT_NEWOBJ | RUBY_INTERNAL_EVENT_FREEOBJ,
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* obj_event_i,
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* data);
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* ```
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*
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* In this example, a callback function `obj_event_i` will be registered for
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* internal events #RUBY_INTERNAL_EVENT_NEWOBJ and
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* #RUBY_INTERNAL_EVENT_FREEOBJ.
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*/
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VALUE rb_tracepoint_new(VALUE target_thread_not_supported_yet, rb_event_flag_t events, void (*func)(VALUE, void *), void *data);
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/**
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* Starts (enables) trace(s) defined by the passed object. A TracePoint object
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* does not immediately take effect on creation. You have to explicitly call
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* this API.
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*
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* @param[in] tpval An instance of TracePoint.
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* @exception rb_eArgError A trace is already running.
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* @return Undefined value. Forget this. It should have returned `void`.
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* @post Trace(s) defined by `tpval` start.
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*/
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VALUE rb_tracepoint_enable(VALUE tpval);
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/**
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* Stops (disables) an already running instance of TracePoint.
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*
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* @param[in] tpval An instance of TracePoint.
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* @return Undefined value. Forget this. It should have returned `void`.
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* @post Trace(s) defined by `tpval` stop.
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*/
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VALUE rb_tracepoint_disable(VALUE tpval);
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/**
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* Queries if the passed TracePoint is up and running.
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*
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* @param[in] tpval An instance of TracePoint.
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* @retval RUBY_Qtrue It is.
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* @retval RUBY_Qfalse It isn't.
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*/
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VALUE rb_tracepoint_enabled_p(VALUE tpval);
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/**
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* Type that represents a specific trace event. Roughly resembles the
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* tracepoint object that is passed to the block of `TracePoint.new`:
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*
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* ```ruby
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* TracePoint.new(*events) do |obj|
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* ... # ^^^^^ Resembles this object.
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* end
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* ```
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*/
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typedef struct rb_trace_arg_struct rb_trace_arg_t;
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RBIMPL_ATTR_RETURNS_NONNULL()
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/**
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* Queries the current event of the passed tracepoint.
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*
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* @param[in] tpval An instance of TracePoint.
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* @exception rb_eRuntimeError `tpval` is disabled.
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* @return The current event.
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*
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* @internal
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*
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* `tpval` is a fake. There is only one instance of ::rb_trace_arg_t at one
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* time. This function just returns that global variable.
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*/
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rb_trace_arg_t *rb_tracearg_from_tracepoint(VALUE tpval);
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RBIMPL_ATTR_NONNULL(())
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/**
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* Queries the event of the passed trace.
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*
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* @param[in] trace_arg A trace instance.
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* @return Its event.
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*/
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rb_event_flag_t rb_tracearg_event_flag(rb_trace_arg_t *trace_arg);
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RBIMPL_ATTR_NONNULL(())
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/**
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* Identical to rb_tracearg_event_flag(), except it returns the name of the
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* event in Ruby's symbol.
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*
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* @param[in] trace_arg A trace instance.
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* @return Its event, in Ruby level Symbol object.
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*/
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VALUE rb_tracearg_event(rb_trace_arg_t *trace_arg);
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RBIMPL_ATTR_NONNULL(())
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/**
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* Queries the line of the point where the trace is at.
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*
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* @param[in] trace_arg A trace instance.
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* @retval 0 The trace is not at Ruby frame.
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* @return otherwise Its line number.
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*/
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VALUE rb_tracearg_lineno(rb_trace_arg_t *trace_arg);
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RBIMPL_ATTR_NONNULL(())
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/**
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* Queries the file name of the point where the trace is at.
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*
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* @param[in] trace_arg A trace instance.
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* @retval RUBY_Qnil The trace is not at Ruby frame.
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* @retval otherwise Its path.
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*/
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VALUE rb_tracearg_path(rb_trace_arg_t *trace_arg);
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RBIMPL_ATTR_NONNULL(())
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/**
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* Queries the method name of the point where the trace is at.
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*
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* @param[in] trace_arg A trace instance.
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* @retval RUBY_Qnil There is no method.
|
|
* @retval otherwise Its method name, in Ruby level Symbol.
|
|
*/
|
|
VALUE rb_tracearg_method_id(rb_trace_arg_t *trace_arg);
|
|
|
|
RBIMPL_ATTR_NONNULL(())
|
|
/**
|
|
* Identical to rb_tracearg_method_id(), except it returns callee id like
|
|
* rb_frame_callee().
|
|
*
|
|
* @param[in] trace_arg A trace instance.
|
|
* @retval RUBY_Qnil There is no method.
|
|
* @retval otherwise Its method name, in Ruby level Symbol.
|
|
*/
|
|
VALUE rb_tracearg_callee_id(rb_trace_arg_t *trace_arg);
|
|
|
|
RBIMPL_ATTR_NONNULL(())
|
|
/**
|
|
* Queries the class that defines the method that the passed trace is at. This
|
|
* can be different from the class of rb_tracearg_self()'s return value because
|
|
* of inheritance(s).
|
|
*
|
|
* @param[in] trace_arg A trace instance.
|
|
* @retval RUBY_Qnil There is no method.
|
|
* @retval otherwise Its method's class.
|
|
*/
|
|
VALUE rb_tracearg_defined_class(rb_trace_arg_t *trace_arg);
|
|
|
|
RBIMPL_ATTR_NONNULL(())
|
|
/**
|
|
* Creates a binding object of the point where the trace is at.
|
|
*
|
|
* @param[in] trace_arg A trace instance.
|
|
* @retval RUBY_Qnil The point has no binding.
|
|
* @retval otherwise Its binding.
|
|
*
|
|
* @internal
|
|
*
|
|
* @shyouhei has no idea on which situation shall this function return
|
|
* ::RUBY_Qnil.
|
|
*/
|
|
VALUE rb_tracearg_binding(rb_trace_arg_t *trace_arg);
|
|
|
|
RBIMPL_ATTR_NONNULL(())
|
|
/**
|
|
* Queries the receiver of the point trace is at.
|
|
*
|
|
* @param[in] trace_arg A trace instance.
|
|
* @return Its receiver.
|
|
*/
|
|
VALUE rb_tracearg_self(rb_trace_arg_t *trace_arg);
|
|
|
|
RBIMPL_ATTR_NONNULL(())
|
|
/**
|
|
* Queries the return value that the trace represents.
|
|
*
|
|
* @param[in] trace_arg A trace instance.
|
|
* @exception rb_eRuntimeError The tracing event is not return-related.
|
|
* @return The return value.
|
|
*/
|
|
VALUE rb_tracearg_return_value(rb_trace_arg_t *trace_arg);
|
|
|
|
RBIMPL_ATTR_NONNULL(())
|
|
/**
|
|
* Queries the raised exception that the trace represents.
|
|
*
|
|
* @param[in] trace_arg A trace instance.
|
|
* @exception rb_eRuntimeError The tracing event is not exception-related.
|
|
* @return The raised exception.
|
|
*/
|
|
VALUE rb_tracearg_raised_exception(rb_trace_arg_t *trace_arg);
|
|
|
|
RBIMPL_ATTR_NONNULL(())
|
|
/**
|
|
* Queries the allocated/deallocated object that the trace represents.
|
|
*
|
|
* @param[in] trace_arg A trace instance.
|
|
* @exception rb_eRuntimeError The tracing event is not GC-related.
|
|
* @return The allocated/deallocated object.
|
|
*/
|
|
VALUE rb_tracearg_object(rb_trace_arg_t *trace_arg);
|
|
|
|
|
|
/** @} */
|
|
|
|
/**
|
|
* @name Postponed Job API
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
/*
|
|
* Postponed Job API
|
|
* rb_postponed_job_register and rb_postponed_job_register_one are
|
|
* async-signal-safe and used via SIGPROF by the "stackprof" RubyGem
|
|
*/
|
|
|
|
/**
|
|
* Type of postponed jobs.
|
|
*
|
|
* @param[in,out] arg What was passed to rb_postponed_job_register().
|
|
*/
|
|
typedef void (*rb_postponed_job_func_t)(void *arg);
|
|
|
|
/**
|
|
* Registers a postponed job.
|
|
*
|
|
* There are situations when running a ruby program is not possible. For
|
|
* instance when a program is in a signal handler; for another instance when
|
|
* the GC is busy. On such situations however, there might be needs to do
|
|
* something. We cannot but defer such operations until we are 100% sure it is
|
|
* safe to execute them. This mechanism is called postponed jobs. This
|
|
* function registers a new one. The registered job would eventually gets
|
|
* executed.
|
|
*
|
|
* @param[in] flags (Unused) reserved for future extensions.
|
|
* @param[in] func Job body.
|
|
* @param[in,out] data Passed as-is to `func`.
|
|
* @retval 0 Postponed job buffer is full. Failed.
|
|
* @retval otherwise Opaque return value.
|
|
* @post The passed job is postponed.
|
|
*/
|
|
int rb_postponed_job_register(unsigned int flags, rb_postponed_job_func_t func, void *data);
|
|
|
|
/**
|
|
* Identical to rb_postponed_job_register_one(), except it additionally checks
|
|
* for duplicated registration. In case the passed job is already in the
|
|
* postponed job buffer this function does nothing.
|
|
*
|
|
* @param[in] flags (Unused) reserved for future extensions.
|
|
* @param[in] func Job body.
|
|
* @param[in,out] data Passed as-is to `func`.
|
|
* @retval 0 Postponed job buffer is full. Failed.
|
|
* @retval otherwise Opaque return value.
|
|
*/
|
|
int rb_postponed_job_register_one(unsigned int flags, rb_postponed_job_func_t func, void *data);
|
|
|
|
/** @} */
|
|
|
|
/**
|
|
* @cond INTERNAL_MACRO
|
|
*
|
|
* Anything after this are intentionally left undocumented, to honour the
|
|
* comment below.
|
|
*/
|
|
|
|
/* undocumented advanced tracing APIs */
|
|
|
|
typedef enum {
|
|
RUBY_EVENT_HOOK_FLAG_SAFE = 0x01,
|
|
RUBY_EVENT_HOOK_FLAG_DELETED = 0x02,
|
|
RUBY_EVENT_HOOK_FLAG_RAW_ARG = 0x04
|
|
} rb_event_hook_flag_t;
|
|
|
|
void rb_add_event_hook2(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_event_hook_flag_t hook_flag);
|
|
void rb_thread_add_event_hook2(VALUE thval, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_event_hook_flag_t hook_flag);
|
|
|
|
/** @endcond */
|
|
|
|
RBIMPL_SYMBOL_EXPORT_END()
|
|
|
|
#endif /* RUBY_DEBUG_H */
|