espressif/binutils-gdb
1
0
Fork 0
mirror of https://github.com/espressif/binutils-gdb.git synced 2025-05-24 02:37:23 +08:00
Code Issues Packages Projects Releases Wiki Activity

Don't steal references in the gdb Python code

Browse Source 
Some Python APIs steal references from their caller, and the refcount
checker supports this via an attribute.

However, in gdb with C++ we have a better idiom available: we can use
std::move on a gdbpy_ref<> instead.  This makes the semantics obvious
at the point of call, and is safer at runtime as well, because the
callee's gdbpy_ref<> will be emptied.

This patch changes the reference-stealing code in gdb to use rvalue
references instead.

Tested on x86-64 Fedora 28.

gdb/ChangeLog
2018-09-16  Tom Tromey  <tom@tromey.com>

	* python/python-internal.h (CPYCHECKER_STEALS_REFERENCE_TO_ARG):
	Remove.
	* python/py-varobj.c (py_varobj_iter_ctor): Change pyiter to
	rvalue reference.  Remove CPYCHECKER_STEALS_REFERENCE_TO_ARG.
	(py_varobj_iter_new): Likewise.
	(py_varobj_get_iterator): Use gdbpy_ref.
This commit is contained in:
Tom Tromey
2018-09-16 07:32:23 -06:00
parent 4a137fec2e
commit 1a3389079d
3 changed files with 17 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
gdb/python/python-internal.h
View File

@ -38,13 +38,6 @@
#define CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF(ARG)
#endif
#ifdef WITH_CPYCHECKER_STEALS_REFERENCE_TO_ARG_ATTRIBUTE
#define CPYCHECKER_STEALS_REFERENCE_TO_ARG(n) \
__attribute__ ((cpychecker_steals_reference_to_arg (n)))
#else
#define CPYCHECKER_STEALS_REFERENCE_TO_ARG(n)
#endif
#ifdef WITH_CPYCHECKER_SETS_EXCEPTION_ATTRIBUTE
#define CPYCHECKER_SETS_EXCEPTION __attribute__ ((cpychecker_sets_exception))
#else