Instead of the hardcoded PAGE_SIZE 4096 macro, use the
real system page-size as queried from the auxillary vector.
Bug: 277272383
Bug: 300367402
Test: atest -c bionic-unit-tests
Change-Id: I2f1ad1b431e36ef45e9f53f713ced6b06e0d4f70
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
We've talked about this many times in the past, but partners struggle to
understand "expected 38, got 22" in these contexts, and I always have to
go and check the header files just to be sure I'm sure.
I actually think the glibc geterrorname_np() function (which would
return "ENOSYS" rather than "Function not implemented") would be more
helpful, but I'll have to go and implement that first, and then come
back.
Being forced to go through all our errno assertions did also make me
want to use a more consistent style for our ENOSYS assertions in
particular --- there's a particularly readable idiom, and I'll also come
back and move more of those checks to the most readable idiom.
I've added a few missing `errno = 0`s before tests, and removed a few
stray `errno = 0`s from tests that don't actually make assertions about
errno, since I had to look at every single reference to errno anyway.
Test: treehugger
Change-Id: Iba7c56f2adc30288c3e00ade106635e515e88179
This isn't a very helpful way to say "realpath() failed":
```
bionic/tests/dlfcn_test.cpp:(1006) Failure in test dlfcn.dladdr_libc
Value of: realpath("/system/lib64/" "hwasan/libc.so", libc_realpath) == libc_realpath
Actual: false
Expected: true
```
Bug: http://b/278795547
Test: treehugger
Change-Id: I1078ab4a675b956327f2578086a1a5e7d8a2928b
This mode instructs the linker to search for libraries in hwasan
subdirectories of all library search paths. This is set up to contain a
hwasan-enabled copy of libc, which is needed for HWASan programs to
operate. There are two ways this mode can be enabled:
* for native binaries, by using the linker_hwasan64 symlink as its
interpreter
* for apps: by setting the LD_HWASAN environment variable in wrap.sh
Bug: 276930343
Change-Id: I0f4117a50091616f26947fbe37a28ee573b97ad0
The libtest_empty.so was built by the "libtest_empty" build rule, and
the other files are copies of that with small edits made by the toybox
hexedit tool. I worked out what to edit in each case from a combination
of "what does the name imply?" and "what does a diff of the xxd output
of the corresponding two arm64 files show?".
I failed to produce a working (by which I mean "failing") local-tls
file despite my best efforts. I'm not sure what exactly it was about the
gold-generated files we didn't like, because the commentary implies that
this would be problematic:
39: 0000000000000004 4 TLS LOCAL DEFAULT 12 tls_var_2
But it loads without complaint.
Test: ran locally
Change-Id: I3b9b2b4db1f8827243541cf13380c6ceb840f123
This is important for enabling the error about unsupported TLS
relocations to local symbols. The fast path tends to skip this error,
because it fails during lookup_symbol(). Add a test for this error.
I didn't see a performance regression in the linker_relocation
benchmark.
Bug: http://b/226978634
Test: m bionic-unit-tests
Change-Id: Ibef9bde2973cf8c2d420ecc9e8fe2c69a5097ce2
This was probably the least worst choice at the time, but we have toybox
readelf now, which is a much lighter-weight dependency (that we already
have for some other tests).
This is also one less use of the *renderscript* LLVM, which we'll be
wanting to finally delete soon.
Test: treehugger
Change-Id: I0e05b8f139ec6e6a425b575368f3d514b8b1cc64
Modify bionic unit tests that are built for glibc so that they also
build against musl. They don't all pass though:
With glibc:
2 SLOW TESTS
4 TIMEOUT TESTS
313 FAILED TESTS
YOU HAVE 2 DISABLED TESTS
With musl:
11 SLOW TESTS
11 TIMEOUT TESTS
363 FAILED TESTS
YOU HAVE 2 DISABLED TESTS
Bug: 190084016
Test: m bionic-unit-tests-glibc with musl
Test: atest bionic-unit-tests-static
Test: atest --host bionic-unit-tests-glibc with glibc
Change-Id: I79b6eab04fed3cc4392450df5eef2579412edfe1
The mips/mips64 targets were never able to pass these tests, and the
supported architectures don't need any of these workarounds.
Test: treehugger
Change-Id: I640a8b7a98ae13d9d9cdb09b0fbef61d31d4c79a
Test (a) that we can load the library, but also (b) that readelf thinks
it contains the relocation encoding we were expecting. Do this for all
four of RELR, ANDROID_RELR, relocation packer, and the original ELF
relocation encoding.
Bug: http://b/147452927
Test: treehugger
Change-Id: I5fab72f99d46991c1b206a1c15c76e185b7148b3
Until now we've only supported RELR with our own OS-private-use
constants. Add support for the official numbers (while maintaining
support for the historical numbers).
Add tests to ensure we continue to support both indefinitely.
We can't yet flip the build system over to using the official constants
because the old GNU binutils objcopy we still use in most cases (for the
mini-debug section) only supports the historical constants.
Bug: http://b/147452927
Test: treehugger
Change-Id: If214fce7fade4316115947e90b78ab40864b61f2
A proposed set of changes:
https://android-review.googlesource.com/q/topic:"no-dup-hwasans"
will cause the HWASAN runtime to be moved from /system/lib64 to
/system/lib64/bootstrap. This causes a problem in the case where libc is built
with HWASAN but init is not built with HWASAN. In this case, libc.so will have
a DT_NEEDED dependency on the HWASAN runtime but init will not. Currently,
init and other bootstrap executables arrange to load bootstrap libraries by
setting rpath, but rpath only has an effect on libraries directly depended
on by the main executable, not libraries indirectly depended on by it. This
means that the loading of the HWASAN runtime will fail.
Instead of relying on rpath to find the bootstrap libraries, modify the
bootstrap linker so that it searches the bootstrap library directory after
searching the rpath.
Change-Id: I297be32e04ecd316ee12b8e694588e1249e2bb89
64bit libraries should be located in /system/lib64 directory
instead of /system/lib for platforms with emulated arhitecture.
This patch updated ALTERNATE_PATH_TO_SYSTEM_LIB for 64bit values
Test: run cts -m CtsBionicTestCases -t dlfcn.dladdr_libc
Change-Id: I29d6d36d15d7e61818c7ed1cfd0786745d9ae6a2
Signed-off-by: Dmytro Chystiakov <dmytro.chystiakov@intel.com>
It's possible and sometimes beneficial for a library to have disjoint mappings
and for other libraries to be mapped into the gap between the mappings using
ANDROID_DLEXT_RESERVED_ADDRESS. See for example the proposal for partitioning
in lld [1].
Because the find_containing_library and do_dl_unwind_find_exidx functions use
a simple bounds check to figure out whether a pointer belongs to a library
they will, given a pointer into a library mapped into the gap of a library
with disjoint mappings, return a pointer to the soinfo for the outer library
instead of the inner one, because the outer library will appear before the
inner one in the solist.
From a user perspective this means that we won't be able to unwind the inner
library's frames on 32-bit ARM with libgcc, dladdr() will return information
for the outer library given a pointer to the inner one and dlopen() et al will
use the linker namespace of the outer library when called from the inner one
(although they will usually be the same).
To make this work correctly, make it so that once find_containing_library
sees a match for the bounds check, it examines the library's PT_LOADs to
make sure that there is a mapping for the given address. This is similar
to how libgcc and libunwind_llvm already handle finding the PT_GNU_EH_FRAME
on non-ARM32 platforms [2,3]. do_dl_unwind_find_exidx is reimplemented in
terms of find_containing_library.
[1] http://lists.llvm.org/pipermail/llvm-dev/2019-February/130583.html
[2] e739ac0e25/libunwind/src/AddressSpace.hpp (L523)
[3] https://android.googlesource.com/toolchain/gcc/+/master/gcc-4.9/libgcc/unwind-dw2-fde-dip.c#294
Test: /data/nativetest{,64}/bionic-unit-tests/bionic-unit-tests on walleye-userdebug
Change-Id: I368fe6ad3c470b3dff80f7d9b04253566d63a7d2
This test is verifying that an ELF TLS solib can't be loaded, but once
ELF TLS is implemented, it *can* be loaded. Removing the test requires
coordinated changes with internal test suites.
I could modify the test to verify that the solib was successfully loaded,
but support for dynamic ELF TLS appears across a few different CLs.
Bug: http://b/78026329
Test: bionic unit tests
Change-Id: If8cd798f456568a5c76310b754cea48ca8edaa82
This relocation is used for static TLS's initial-exec (IE) accesses.
A TLS symbol's value is its offset from the start of the ELF module's
TLS segment. It doesn't make sense to add the load_bias to this value,
so skip the call to soinfo::resolve_symbol_address.
Allow TLS relocations to refer to an unresolved weak symbol. In that case,
sym will be non-zero, but lsi will be nullptr. The dynamic linker resolves
the TPREL relocation to 0, making &missing_weak_symbol equal the thread
pointer.
Recognize Gold-style relocations to STB_LOCAL TLS symbols/sections and
issue an error.
Remove the "case R_AARCH64_TLS_TPREL64", because the R_GENERIC_TLS_TPREL
case handles it.
Remove the no-op R_AARCH64_TLSDESC handler. It's better to issue an error.
dlopen_library_with_ELF_TLS now fails with a consistent error about an
unimplemented dynamic TLS relocation.
Bug: http://b/78026329
Test: bionic unit tests (elftls tests are added in a later CL)
Change-Id: Ia08e1b5c8098117e12143d3b4ebb4dfaa5ca46ec
Use a global gtest isolation runner rather than the custom one in
bionic.
Test: Ran all unit tests and verified same behavior before and after.
Change-Id: I24a7cf17cf8e018d0f51969c64b53ce9059cc779
The tls_nodelete state should apply to load_group not
isolated soinfo. This actually also means that multiple
soinfos may have tls_counter on their dso_handles.
This change replaces TLS_NODELETE flag with secondary counter.
Note that access to the secondary counter (located inside soinfo)
is pretty expensive because it requires soinfo lookup by dso_handle
whereas dso_handle counter is much faster. This is why it is updated
only when dso_handle counter starts or hits 0.
Bug: http://b/80278285
Test: bionic-unit-tests --gtest_filter=dl*
Change-Id: I535583f6714e45fa2a7eaf7bb3126da20ee7cba9
DT_ANDROID_REL is 0x6000000f, but this code defined it as 0x60000002.
DT_ANDROID_RELA is 0x60000011, but this code defined it as 0x60000004.
compat_elf_hash_and_relocation_tables tests that certain shared libraries
are linked with ordinary relocations and not with packed relocations. A
shared library will only have one kind of relocation table, so the test
mostly still worked by requiring DT_REL[A].
Previously, this test would have allowed libdl.so to have packed
relocations.
Test: /data/nativetest/bionic-unit-tests/bionic-unit-tests \
--gtest_filter=dlext.compat_elf_hash_and_relocation_tables
Test: manual
Bug: none
Change-Id: Ic8aa919a68fb6ed01a7994b69c0c7dd3798d6b67
* Specify "nocrt: true" to avoid calling __cxa_finalize.
* Define a dummy __aeabi_unwind_cpp_pr0 for arm32.
Bug: b/62815515
Bug: b/73873002
Test: boot AOSP hikey960-userdebug
Test: run ndk_cxa_example in special /system/bin/debug namespace
Test: run Bionic unit tests
Change-Id: I59bcb100a2753286b59c51a47d7a183507219a07
Explicitly say "warning" for warnings, explicitly say what action
we're going to take (such as "(ignoring)"), always provide a link to
our documentation when there is one, explicitly say what API level the
behavior changes at, and explicitly say why we're allowing the misbehavior
for now.
Bug: http://b/71852862
Test: ran tests, looked at logcat
Change-Id: I1795a5af45deb904332b866d7d666690dae4340b
RTLD_NEXT/DEFAULT lookup should not skip handle lookup
in the case when the load group is RTLD_GLOBAL.
Note that there is a difference between load group is local group.
The local group includes externally referenced libraries where
the load group does not. The external reference in this context is a
DT_NEEDED library that belongs to a previously loaded group.
Bug: http://b/72237367
Test: bionic-unit-tests --gtest_filter=dl*
Change-Id: I8997cc961c13a5396f1756161798b45ed1cab16c
From http://man7.org/linux/man-pages/man7/vdso.7.html:
user ABI vDSO name
─────────────────────────────
aarch64 linux-vdso.so.1
arm linux-vdso.so.1
ia64 linux-gate.so.1
mips linux-vdso.so.1
ppc/32 linux-vdso32.so.1
ppc/64 linux-vdso64.so.1
s390 linux-vdso32.so.1
s390x linux-vdso64.so.1
sh linux-gate.so.1
* i386 linux-gate.so.1
* x86-64 linux-vdso.so.1
x86/x32 linux-vdso.so.1
Note that Android "x86" is Linux's "i386", which is the odd one out
amongst Android's supported architectures.
Bug: http://b/72831787
Test: ran tests
Change-Id: I0a28127af042e2fd7673f24bbb30f8a50556cf96
This is a squash revert of a4a4854 and 1b0f2b4
Revert "Remove a test for backwards compatibility we no longer support."
This reverts commit a4a485454a.
# This is the commit message #2:
Revert "Remove obsolete workaround."
This reverts commit 1b0f2b49d5.
Bug: 72143978
Bug: 24465209
Test: Tested failing case on sailfish, reverted back all CL's since
Test: 3471433 for b/24465209 and apps open
Introduce new flag to mark soinfo as TLS_NODELETE when
there are thread_local dtors associated with dso_handle
belonging to it.
Test: bionic-unit-tests --gtest_filter=dl*
Test: bionic-unit-tests-glibc --gtest_filter=dl*
Bug: https://github.com/android-ndk/ndk/issues/360
Change-Id: I724ef89fc899788f95c47e6372c38b3313f18fed
Using fclose to get the same address for the test assertion because
Samsung already uses LD_PRELOAD to intercept `close`.
Bug: http://b/67978141
Bug: http://b/68855476
Test: ran tests
Change-Id: I2da463e8b27e0db5cb1ba370d30f0402d7531396
Signed-off-by: Raj Mamadgi <r.mamadgi@samsung.com>
arm32 is still missing vdso (at least on some kernels).
This commit adds explicit check for it and skip the test
if AT_SYSINFO_EHDR is not set.
Test: run 32bit bionic-unit-tests --gtest_filter=dlfcn.dlopen_vdso on angler
Change-Id: I7fae78c6a4f819601a4ac9e8e1da53ff07c833ff
Also set linked flag after it is linked and
call constructors. Set RTLD_NODELETE flag to
prevent accidental unloads.
Test: bionic-unit-tests --gtest_filter=dl*:Dl*
Test: bionic-unit-tests-glibc --gtest_filter=dl*
Change-Id: Ib2178849b918cbefd6f8fcfe6d1f78889fe0bf76
Building ruby actually trips over both of these:
* if the RTLD_ constants aren't #defined, it uses its own incorrect values.
* if the REG_ constants aren't #defined, it confuses x86 with x86-64.
In all other places where we have enums in our headers, we already match
existing glibc practice.
Bug: http://b/62531921
Test: builds
Change-Id: I5b3aab25a1a24611bdc58f2eda4104a78e9f841c
Since clang does not produce IRELATIVE relocations
this test started passing when we switched away from gcc
This is still a problem because it now leads to
situation where static ifuncs become globally visible
but this is a different problem.
Test: bionic-unit-tests --gtest_filer=dl*
Change-Id: Id27ba5093b88519c00acbc43ab8a991a671a9f51
Do not load second copy of libraries that are supposed to
be provided by linked namespaces. Also do not print
error in the log if caller tries to open shared library
using absolute path for apps targeting N+.
Bug: http://b/35454141
Bug: http://b/26833548
Bug: http://b/35338922
Test: run bionic-unit-tests --gtest_filter=dl*
Change-Id: Icf3aeedff18d287d2ba0b3df3808b100f3ef5f7a
In the case when there are multiple dependencies on
the same library in the local_group the unload may
in some situations (covered now by tests) result
calling d-tors for some libraries prematurely.
In order to have correct call order loader checks if this
is last dependency in local group before adding it to BFS
queue.
Bug: http://b/35201832
Test: bionic-unit-tests --gtest_filter=dl*:Dl*
Test: bionic-unit-tests-glibc --gtest_filter=dl*
Change-Id: I4c6955b9032acc7147a51d9f09b61d9e0818700c
