To make it easier for Native Bridge implementations
to override these symbols.
Bug: http://b/67993967
Test: make
Change-Id: I4c53e53af494bca365dd2b3305ab0ccc2b23ba44
On aarch64/x86/x86_64 add a macro that inserts a cfi directive that will
stop unwinding.
For arm, clang doesn't allow emitting .cantunwind, so add a comment and
leave it the same as it current is.
Add this macro to __libc_init and __start_thread.
Also, remove duplicate compilation of libc_init_static.cpp that already
includes the static library that includes that file.
Bug: 15469122
Test: Did unwinds using new unwinder tool (unwind) and debuggerd -b
Test: and verified new unwinder works on aarch64/x86/x86_64.
Test: Verified that it works on old unwinder for aarch64/x86, but
Test: x86_64 doesn't work properly, but as well as before.
Change-Id: I77302e8f6c7ba1549d98a4a164106ee82c9ecadc
With this, stack frame 0 is the abort, not tgkill.
arm:
#00 pc 0001a41c /system/lib/libc.so (abort+63)
arm64:
#00 pc 000000000001d75c /system/lib64/libc.so (abort+120)
Also "include what you use" for <sys/syscall.h>.
Bug: N/A
Test: ran `crasher abort` and `crasher64 abort`
Change-Id: I6517ac67b39b4133e890d52efc115071c812958b
This was previously done only in fork() and pthread_create(), but this left raw
clone() with an invalid cached tid. Since the tid is used for pthread routines,
this led to unstable behavior after clone().
Test: ltp clone01 (see bug for more)
Test: mmma bionic/tests
Test: bionic-unit-tests-static --gtest_filter=*fork*:*clone*
Bug: 32612735
Bug: 32305649
Change-Id: I30eae5a8024b4c5da65476fcadfe14c6db35bb79
The tid is cached in the pthread_internal_t and is properly re-set after fork()
and pthread_create(). But after a plain clone() the value is stale from the
parent.
Test: mmma bionic/tests
Test: bionic-unit-tests-static --gtest_filter=*fork*:*clone*
Test: m checkbuild tests
Test: angler boots
Bug: 32305649
Change-Id: I026d416d1537484cd3e05c8493a35e5ed2acc8ed
* Allow clone where both the child function and stack are null. It's
obviously wrong to ask to call a function without a stack, but it's not
necessarily wrong to supply no stack if you're also not supplying a
function.
* Reimplement fork in terms of the clone function, rather than using the
clone system call directly.
This is intended as a step towards enabling use of pid namespaces.
Change-Id: I03c89bd1dc540d8b4ed1c8fdf6644290744b9e91
The clone syscall accepts NULL child stacks, interpreting this to mean
the child gets a copy of the parent's stack with copy-on-write
semantics. However clone(2) is explicitly documented to treat this an
an error.
"Fortunately" every architecture's __bionic_clone implementation pushes
something onto the child stack before making the clone syscall. So we
know fixing this won't break legacy apps, because any app that tried
using a NULL child stack would have died with SIGSEGV.
This change fixes the LTP clone04 testcase.
Change-Id: I663b34f34bc8dad2aa405c46e4eed4418cccca0d
Signed-off-by: Greg Hackmann <ghackmann@google.com>
<features.h> is supposed to take user-settable stuff like _GNU_SOURCE
and _BSD_SOURCE and turn them into __USE_GNU and __USE_BSD for use in
the C library headers. Instead, bionic used to unconditionally define
_BSD_SOURCE and _GNU_SOURCE, and then test _GNU_SOURCE in the header
files (which makes no sense whatsoever).
Bug: 14659579
Change-Id: Ice4cf21a364ea2e559071dc8329e995277d5b987
If you make clone, fork, or vfork system calls directly, you're still
on your own, but we now do the right thing for the clone wrapper.
With this implementation, children lose the getpid caching, but we've
no reason to think that that covers any significant use cases.
Bug: 15387103
Change-Id: Icfab6b63c708fea830960742ec92aeba8ce7680d
Also let clone(2) set the TLS for x86.
Also ensure we initialize the TLS before we clone(2) for all architectures.
Change-Id: Ie5fa4466e1c9ee116a281dfedef574c5ba60c0b5
clone(2) is the public symbol.
Also switch a test from __bionic_clone to clone; testing public API
means the test now works on glibc too.
Change-Id: If59def26a00c3afadb8a6cf9442094c35a59ffde
The kernel now maintains the pthread_internal_t::tid field for us,
and __clone was only used in one place so let's inline it so we don't
have to leave such a dangerous function lying around. Also rename
files to match their content and remove some useless #includes.
Change-Id: I24299fb4a940e394de75f864ee36fdabbd9438f9
2013-11-19 14:08:54 -08:00
Renamed from libc/bionic/bionic_clone.c (Browse further)
