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ruby--ruby/ext/-test-/debug/profile_frames.c
Ivo Anjo 649bfbe00d Fix rb_profile_frames output includes dummy main thread frame
The `rb_profile_frames` API did not skip the two dummy frames that
each thread has at its beginning. This was unlike `backtrace_each` and
`rb_ec_parcial_backtrace_object`, which do skip them.

This does not seem to be a problem for non-main thread frames,
because both `VM_FRAME_RUBYFRAME_P(cfp)` and
`rb_vm_frame_method_entry(cfp)` are NULL for them.

BUT, on the main thread `VM_FRAME_RUBYFRAME_P(cfp)` was true
and thus the dummy thread was still included in the output of
`rb_profile_frames`.

I've now made `rb_profile_frames` skip this extra frame (like
`backtrace_each` and friends), as well as add a test that asserts
the size and contents of `rb_profile_frames`.

Fixes [Bug #18907] (<https://bugs.ruby-lang.org/issues/18907>)
2022-07-26 10:43:44 +09:00

44 lines
1.4 KiB
C

#include "ruby/ruby.h"
#include "ruby/debug.h"
#define MAX_BUF_SIZE 0x100
static VALUE
profile_frames(VALUE self, VALUE start_v, VALUE num_v)
{
int i, collected_size;
int start = NUM2INT(start_v);
int buff_size = NUM2INT(num_v);
VALUE buff[MAX_BUF_SIZE];
int lines[MAX_BUF_SIZE];
VALUE result = rb_ary_new();
if (buff_size > MAX_BUF_SIZE) rb_raise(rb_eRuntimeError, "too long buff_size");
collected_size = rb_profile_frames(start, buff_size, buff, lines);
for (i=0; i<collected_size; i++) {
VALUE ary = rb_ary_new();
rb_ary_push(ary, rb_profile_frame_path(buff[i]));
rb_ary_push(ary, rb_profile_frame_absolute_path(buff[i]));
rb_ary_push(ary, rb_profile_frame_label(buff[i]));
rb_ary_push(ary, rb_profile_frame_base_label(buff[i]));
rb_ary_push(ary, rb_profile_frame_full_label(buff[i]));
rb_ary_push(ary, rb_profile_frame_first_lineno(buff[i]));
rb_ary_push(ary, rb_profile_frame_classpath(buff[i]));
rb_ary_push(ary, rb_profile_frame_singleton_method_p(buff[i]));
rb_ary_push(ary, rb_profile_frame_method_name(buff[i]));
rb_ary_push(ary, rb_profile_frame_qualified_method_name(buff[i]));
rb_ary_push(ary, INT2NUM(lines[i]));
rb_ary_push(result, ary);
}
return result;
}
void
Init_profile_frames(VALUE klass)
{
rb_define_module_function(klass, "profile_frames", profile_frames, 2);
}