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Bug 1651323 - Add MOZ_LIFETIME_BOUND attribute. r=andi

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Differential Revision: https://phabricator.services.mozilla.com/D82681
This commit is contained in:
Simon Giesecke 2020-07-10 12:16:13 +00:00
parent 38b52efd30
commit 4fa1e97bce
1 changed files with 6 additions and 0 deletions
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6
mfbt/Attributes.h
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@ -720,6 +720,9 @@
* MOZ_MAY_CALL_AFTER_MUST_RETURN: Applies to function or method declarations.
* Calls to these methods may be made in functions after calls a
* MOZ_MUST_RETURN_FROM_CALLER_IF_THIS_IS_ARG method.
* MOZ_LIFETIME_BOUND: Applies to method declarations.
* The result of calling these functions on temporaries may not be returned as
* a reference or bound to a reference variable.
*/
// gcc emits a nuisance warning -Wignored-attributes because attributes do not
@ -803,6 +806,8 @@
__attribute__((annotate("moz_must_return_from_caller_if_this_is_arg")))
# define MOZ_MAY_CALL_AFTER_MUST_RETURN \
__attribute__((annotate("moz_may_call_after_must_return")))
# define MOZ_LIFETIME_BOUND __attribute__((annotate("moz_lifetime_bound")))
/*
* It turns out that clang doesn't like void func() __attribute__ {} without a
* warning, so use pragmas to disable the warning.
@ -854,6 +859,7 @@
# define MOZ_REQUIRED_BASE_METHOD /* nothing */
# define MOZ_MUST_RETURN_FROM_CALLER_IF_THIS_IS_ARG /* nothing */
# define MOZ_MAY_CALL_AFTER_MUST_RETURN /* nothing */
# define MOZ_LIFETIME_BOUND /* nothing */
# endif /* defined(MOZ_CLANG_PLUGIN) || defined(XGILL_PLUGIN) */
# define MOZ_RAII MOZ_NON_TEMPORARY_CLASS MOZ_STACK_CLASS