On most architectures the kernel subtracts a random offset to the stack
pointer in create_elf_tables by calling arch_align_stack before writing
the auxval table and so on. On all but x86 this doesn't cause a problem
because the random offset is less than a page, but on x86 it's up to two
pages. This means that our old technique of rounding the stack pointer
doesn't work. (Our old implementation of that technique was wrong too.)
It's also incorrect to assume that the main thread's stack base and size
are constant. Likewise to assume that the main thread has a guard page.
The main thread is not like other threads.
This patch switches to reading /proc/self/maps (and checking RLIMIT_STACK)
whenever we're asked.
Bug: 17111575
Signed-off-by: Fengwei Yin <fengwei.yin@intel.com>
(cherry picked from commit 57b7a6110e)
Change-Id: I87e679ee1c0db8092f2d1221c8e7c1461545c5a4
This test only works if you're root (strictly: if you have permission to
CLONE_NEWNS), so it's useful to us when we're doing ad hoc testing (since
that's usually done as root), but it's not useful as part of CTS or when
running the tests on the host.
Bug: 16705621
Bug: 17170200
Change-Id: Ia92c871b15f7e45fc174bb59bc95540fd00ae745
Removes the leading underscores from __android_set_abort_message() and
moves its declaration into a public header file.
Bug: 17059126
Change-Id: I470c79db47ec783ea7a54b800f8b78ecbe7479ab
(cherry picked from commit ce6b1abbb1)
(cherry picked from commit 3a25ab952b)
This is an alternate, somewhat simpler, fix that makes it safe to
include both <atomic> and <stdatomic.h> from C++ code in either order.
It means that C code consistently uses one implementation of atomics
and C++ another. We still have to make sure that those two
implementations interoperate correctly at runtime; in particular,
any flavor of atomic object needs to be represented exactly like the
underlying type, with the proper alignment constraint.
Bug:17007799
Change-Id: Iffcfc5220d8fa150f89dd083a121b24d23f268fc
(cherry picked from commit 019d395811)
Glibc calls theirs __ctype_get_mb_cur_max. Make ours match to cut down
on differences between bionic and glibc.
Bug: 11156955
Change-Id: Ib7231f01aa9676dff30aea0af25d597bfe07bc73
Do not run symbol lookup on already visited soinfos
Not taking into account already visited libraries
dramatically slows down dlsym in cases when there
are multiple occurrences of a large library in
dependency tree.
Bug: 16977077
(cherry picked from commit 042426ba63)
Change-Id: I69d59e395e8112f119343e8a4d72fe31cd449f31
Now that -Bsymbolic is fixed, we can hide __libc_malloc_dispatch without
breaking ASAN.
Bug: 11156955
Change-Id: Ia2fc9b046a74e666b33aa6c6c5435f70a63b8021
The old definition only worked for functions that didn't use numbered
local labels. Upstream uses '666' not only as some kind of BSD in-joke,
but also because there's little likelihood of any function having
labels that high.
There's a wider question about whether we actually want to go via the
PLT at all in this code, but that's a question for another day.
Bug: 16906712
Change-Id: I3cd8ecc448b33f942bb6e783931808ef39091489
This fixes the build after the -Bsymbolic change.
Bug: 16853291
Change-Id: I989c9fec3c32e0289ea257a3bd2b7fd2709b6ce2
(cherry picked from commit bc9f9f25bf)
The property libc.debug.malloc.nobacktrace set to non-zero disables
getting backtracing when using mode 1 or mode 10.
Bug: 16874447
Change-Id: I7650ba9f4385b5110b743cab01e877fc69545b3c
Clean up the x86/x86_64 assembler. The motivator (other than reducing
confusion) was that asm.h incorrectly checked PIC rather than __PIC__.
Bug: 16823325
(cherry picked from commit 6b6364a7fc)
Change-Id: I89ca57fa0eb34a36de6cb11ea85f71054fce709d
During pthread_exit, the keys are cleaned. Unfortunately, a call to
free occurs after the cleanup and the memory for some of the keys
is recreated when using jemalloc. The solution is to do the key
cleanup twice.
Also, modify the pthread_detach__leak test to be less flaky
when run on a jemalloc system.
Bug: 16513133
Change-Id: Ic17e8344bdc1ba053c4f5b6d827a4c19c57860c1
The recent libcore ZoneInfo changes mean that we can no longer
compile libcore's ZoneInfo against the RI. Luckily, the field in
our data file that we needed ZoneInfo for isn't actually used.
This change removes our dependence on libcore.
I've left the field in to avoid a file format change. We can remove
the field if/when we next have a real need to bump the file format.
Bug: 16168653
Change-Id: Iedad2252c2b49f4d8bb2c7d9078b39b622444ca7
From the release notes:
Changes affecting future time stamps
Russia will subtract an hour from most of its time zones on
2014-10-26 at 02:00 local time. (Thanks to Alexander Krivenyshev.)
There are a few exceptions: Magadan Oblast (Asia/Magadan) and
Zabaykalsky Krai are subtracting two hours; conversely, Chukotka
Autonomous Okrug (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka),
Kemerovo Oblast (Asia/Novokuznetsk), and the Samara Oblast and the
Udmurt Republic (Europe/Samara) are not changing their clocks. The
changed zones are Europe/Kaliningrad, Europe/Moscow,
Europe/Simferopol, Europe/Volgograd, Asia/Yekaterinburg, Asia/Omsk,
Asia/Novosibirsk, Asia/Krasnoyarsk, Asia/Irkutsk, Asia/Yakutsk,
Asia/Vladivostok, Asia/Khandyga, Asia/Sakhalin, and Asia/Ust-Nera;
Asia/Magadan will have two hours subtracted; and Asia/Novokuznetsk's
time zone abbreviation is affected, but not its UTC offset. Two
zones are added: Asia/Chita (split from Asia/Yakutsk, and also with
two hours subtracted) and Asia/Srednekolymsk (split from
Asia/Magadan, but with only one hour subtracted). (Thanks to Tim
Parenti for much of the above.)
Changes affecting past time stamps
China's five zones have been simplified to two, since the post-1970
differences in the other three seem to have been imaginary. The
zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been
removed; backwards-compatibility links still work, albeit with
different behaviors for time stamps before May 1980. Asia/Urumqi's
1980 transition to UTC+8 has been removed, so that it is now at
UTC+6 and not UTC+8. (Thanks to Luther Ma and to Alois Treindl;
Treindl sent helpful translations of two papers by Guo Qingsheng.)
Some zones have been turned into links, when they differed from
existing zones only for older UTC offsets where the data were likely
invented. These changes affect UTC offsets in pre-1970 time stamps
only. This is similar to the change in release 2013e, except this
time for western Africa. The affected zones are: Africa/Bamako,
Africa/Banjul, Africa/Conakry, Africa/Dakar, Africa/Freetown,
Africa/Lome, Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome,
and Atlantic/St_Helena. This also affects the
backwards-compatibility link Africa/Timbuktu. (Thanks to Alan
Barrett, Stephen Colebourne, Tim Parenti, and David Patte for
reporting problems in earlier versions of this change.)
Asia/Shanghai's pre-standard-time UT offset has been changed from
8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its
transition to standard time has been changed from 1928 to 1901.
Asia/Taipei switched to JWST on 1896-01-01, then to JST on
1937-10-01, then to CST on 1945-09-21 at 01:00, and did not observe
DST in 1945. In 1946 it observed DST from 05-15 through 09-30; in
1947 from 04-15 through 10-31; and in 1979 from 07-01 through 09-30.
(Thanks to Yu-Cheng Chuang.)
Asia/Riyadh's transition to standard time is now 1947-03-14, not
1950.
Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not
10-03 at 00:00. (Thanks to Konstantin Hyppönen.)
Pacific/Pago_Pago has been changed from UTC-11:30 to UTC-11 for the
period from 1911 to 1950.
Pacific/Chatham has been changed to New Zealand standard time plus
45 minutes for the period before 1957, reflecting a 1956 remark in
the New Zealand parliament.
Europe/Budapest has several pre-1946 corrections: in 1918 the
transition out of DST was on 09-16, not 09-29; in 1919 it was on
11-24, not 09-15; in 1945 it was on 11-01, not 11-03; in 1941 the
transition to DST was 04-08 not 04-06 at 02:00; and there was no DST
in 1920.
Africa/Accra is now assumed to have observed DST from 1920 through
1935.
Time in Russia before 1927 or so has been corrected by a few seconds
in the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi,
Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg,
Europe/Helsinki, and Europe/Riga. Also, Moscow's location has been
changed to its Kilometer 0 point. (Thanks to Vladimir Karpinsky for
the Moscow changes.)
Bug: 16168653
Change-Id: I23827254bcf50dd07a2192ed34b02224d73e07a0
Previously this was hard coded to 4. This is only the case for UTF-8
locales.
As a side effect, this properly reports C.UTF-8 as the default locale
instead of C.
Change-Id: I7c73cc8fe6ffac61d211cd5f75287e36de06f4fc
(cherry picked from commit 1aec7c1a35)
A mistake I made while cleaning this up the first time through.
mbstrtowcs(3) sets the src param to null if it finishes the string.
Change-Id: I6263646e25d9537043b7025fd1dd6ae195f365e2
(cherry picked from commit b6cc8e00cd)
We're getting cold feet on this one... let's put it back.
This reverts commit 210331d976.
Change-Id: I6b0d3c2b1dbf7f1dc9566979a91b7504c2189269
(cherry picked from commit 6a918870ba)
This reverts most of commit 2582f02a01.
The DNS cache flushing code needs to be called when routes change.
Change-Id: I5b04121bc428cc6a2e136b6c3269c395bfb4981f
bug:16549455
The memchr implementation for 64 bit fails if these conditions occur:
- The buffer is 32 byte aligned.
- The buffer contains the character in the first byte.
- The count sent in is zero.
The function should return NULL, but it's not.
Bug: 16676625
(cherry picked from commit e03e1eac0b)
Change-Id: Ie4cca2c445127a0936ee2b96651a8e7204fbaffd
Create a method of disabling the debug allocation code paths so that
it's possible to use the libunwindbacktrace library without any
modifications.
Use this path to create and destroy the maps for the process. It's not
stricly necessary in the init code since the symbols are not modified
until after the initialize calls.
Also, remove the debug_XXX source files that doesn't need to be in libc.so.
Fix the maps reading code since it was completely broken for 64 bit.
Bug: 16408686
(cherry picked from commit 861c0ef37b)
Change-Id: I04445f0cf9a1e85172b64d57df92eb7939ce2332
