Commit Graph

14 Commits

Author SHA1 Message Date
Elliott Hughes f4ace9d634 libc/include: remove easy __ANDROID_API__ tautologies.
The next NDK to take these headers only supports API 21 and later, so
clean up some of the trivial cruft.

This doesn't include the remaining "legacy inlines", since they're a bit
more complicated. I'll remove those in later changes.

Test: treehugger
Change-Id: I94c32f6393dd3ae831165917303ea591222baa0d
2023-02-23 17:38:37 +00:00
Elliott Hughes 95c6cd753f Stop using the __ANDROID_API_x__ constants.
Historically we've made a few mistakes where they haven't matched the
right number. And most non-Googlers are much more familiar with the
numbers, so it seems to make sense to rely more on them. Especially in
header files, which we actually expect real people to have to read from
time to time.

Test: treehugger
Change-Id: I0d4a97454ee108de1d32f21df285315c5488d886
2019-12-20 13:26:14 -08:00
George Burgess IV 8a0cdb15a1 fortify: allow diagnostics without run-time checks (attempt #2)
In configs like ASAN, we can't use _chk functions. This CL builds off of
previous work to allow us to still emit diagnostics in conditions like
these.

Wasn't 100% sure what a good test story would look like here. Opinions
appreciated.

Bug: 141267932
Test: checkbuild on internal-master. TreeHugger for x86_64.
Change-Id: I65da9ecc9903d51a09f740e38ab413b9beaeed88
2019-11-19 14:20:26 -08:00
George Burgess IV f359548bf1 Revert "fortify: allow diagnostics without run-time checks"
This reverts commit d7e11b8853.

Reason for revert: Breaks aosp_x86_64-eng. Will look into it and
unbreak when it's not almost midnight. :)

Change-Id: I21f76efe4d19c70d0b14630e441376d359a45b49
2019-11-07 07:07:38 +00:00
George Burgess IV d7e11b8853 fortify: allow diagnostics without run-time checks
In configs like ASAN, we can't use _chk functions. This CL builds off of
previous work to allow us to still emit diagnostics in conditions like
these.

Wasn't 100% sure what a good test story would look like here. Opinions
appreciated.

Bug: 141267932
Test: checkbuild on internal-master
Change-Id: I8d4f77d7b086a8128a18a0a0389243d7fa05b00f
2019-11-01 16:25:55 -07:00
George Burgess IV db87607524 fortify(poll): emit diagnostics regardless of API level
Bug: 141267932
Test: m checkbuild on internal-master

Change-Id: I5e147d28ec606c104b5905fd3d0c3fc197f0e4b8
2019-09-30 13:00:36 -07:00
George Burgess IV a1a09b211e fortify: use __builtin_constant_p for more short-circuits
This also lets us retire our |__enable_if| version of |strlen|, which
should catch strictly fewer cases where we can fold the string's length
to a constant than |__builtin_constant_p| inside of |strlen|.

Bug: 131861088
Test: checkbuild on internal master. blueline bionic tests pass + it
      boots.
Change-Id: I21b750a24f7d1825591a88d12a385be03a0a7ca3
2019-05-23 15:01:54 -07:00
George Burgess IV 5273dc588a fortify: use a macro in diagnose_if
Our diagnose_if conditions are repetitive. It's potentially convenient
to hide that behind a macro. There's an upcoming refactor to our
run-time checks; having static checks look super similar is convenient,
and makes correctness (hopefully) slightly more obvious.

Bug: 131861088
Test: checkbuild on internal master.
Change-Id: Ic39a3b6bf020734c1bef6be144f61ef81466aafe
2019-05-23 13:38:09 -07:00
Elliott Hughes 0d1a8a5b0b Reland "Retire GCC FORTIFY."
This reverts commit 4dbe8fc22f.

The angler/bullhead builds are now dead, so this can go in.

Bug: https://issuetracker.google.com/74404306
Change-Id: I130cdcd6375b6125cb8a1e63a4a540b0dbe41ceb
2018-07-24 19:36:51 +00:00
Elliott Hughes 4dbe8fc22f Revert "Retire GCC FORTIFY."
This reverts commit 067bdc9546.

The angler/bullhead builds still use GCC, so I'll wait until they're turned down.

Bug: https://issuetracker.google.com/74404306
Change-Id: I777b08dd6ab5250d532b4b5cc56e9a790c13db20
2018-07-24 18:54:16 +00:00
Elliott Hughes 067bdc9546 Retire GCC FORTIFY.
NDK r18 (which removes GCC) is about to ship. We don't need this any more.

The immediate motivation for removing this right now is that the test
fails whenever we add Clang-only flags to the build system.

While we're here, clean up <stdatomic.h> too.

Bug: https://issuetracker.google.com/74404306
Test: ran tests
Change-Id: Iaad5d634d1ba76f0b6f19ad32cc27b2533771a4a
2018-07-23 17:22:58 -07:00
Elliott Hughes b83bf14a35 Fortify ppoll64.
I've deliberately not bothered with the GCC implementation because we'll
have removed GCC from the NDK before anyone gets to use this.

Bug: http://b/72493232
Test: ran tests
Change-Id: Icfc2a3b214739ab53aa41bacacc11b5c67498fb4
2018-03-22 13:59:02 -07:00
George Burgess IV 52dde5fb1c libc fortify: make poll.h and stat.h use diagnose_if
Bug: 12231437
Test: m checkbuild on bionic internal master; CtsBionicTestCases show
no new failures.

Change-Id: I7dbdeca12c46d1ee3804f13546b11c3f3b3a7596
2017-08-01 21:32:12 -07:00
George Burgess IV b97049c039 libc: Split FORTIFY into its own headers
This patch cleans up our standard headers by moving most of the FORTIFY
cruft out in to its own sandbox. In order to include the *_chk and
*_real declarations, you can either enable FORTIFY, or `#define
__BIONIC_DECLARE_FORTIFY_HELPERS`.

Both sys/select.h and strings.h are explicitly ignored by this patch.
Both of these files have very small __BIONIC_FORTIFY blocks, and don't
define any actual FORTIFY'ed functions (just macros, and 3 *_chk
functions).

This patch also makes the versioner ignore the FORTIFY implementation
headers, since we're guaranteed to pick the FORTIFY'ed headers up when
looking at the regular headers. (...Not to mention that making the
FORTIFY'ed headers freestanding would be annoying to do and maintain for
~no benefit).

We bake the knowledge of where FORTIFY headers live directly into the
versioner. We could go with a more general approach (e.g. adding an -X
IGNORED_FILE flag that tells the versioner to ignore
$HEADER_PATH/$IGNORED_FILE), but we'd then have to repeat that for every
test, every manual invocation of the versioner, etc. for no benefit
that's obvious to me.

Bug: 12231437
Test: m checkbuild on bullhead internal master + CtsBionicTestCases. no
new errors.

Change-Id: Iffc0cc609009b33d989cdaddde0a809282131a5b
2017-07-27 17:00:13 -07:00