For some reason, the memunreachable tests are rock solid on the
devices covered by APCT, but catch a ton of false-negatives on
hikey960, which show up as failures that look like:
system/core/libmemunreachable/tests/MemUnreachable_test.cpp:200: Failure
Expected equality of these values:
1U
Which is: 1
info.leaks.size()
Which is: 0
These happen when a stray copy of a pointer is lying around that
points to the memory it is expected to leak. The stray pointers
can be on the stack or in the jemalloc thread cache of freed
allocations, which is always considered active memory.
Add some extra cleanups to get rid of old pointers.
1. Clear the tcache when destructing UnreachableMemoryInfo
2. Clear the stack and tcache before and after each test
3. Make MemunreachbleTest.twice match MemunreachableTest.stack
Also fix MemunreachableTest.notdumpable, which was only passing
when run as root, which was bypassing what the test was trying
to cover. Make the test pass when run as non-root, and skip
when the test is running as root.
Bug: 79701104
Test: memunreachable_test
Test: memunreachable_test as root
Change-Id: Ia6c6df11e76405d08118afcc19c1fe80a6684c56
The kernel can hold references to binder objects that have no userspace
references. Allow libmemunreachable to call into libbinder and
libhwbinder to get lists of kernel references. Use undefined weak
symbols so that libmemunreachable will continue to work in processes
that do not have libbinder.
Test: memunreachable_binder_test
Bug: 28275695
Change-Id: I9eae73f2a51a49a7025ffe6309ccdc2693a2391b
Putting libmemunreachable in the global C++ namespace was an oversight,
move it into namespace android.
Test: m -j checkbuild
Change-Id: I0799906f6463178cb04a719bb4054cad33a50dbe
Also, add a link to the .clang-format-2 for this directory and clang
format the files that changed.
Bug: 31919199
Test: Boot bullhead.
Test: Run unit tests on bullhead. There are a few that fail, but they
Test: failed before and are not a result of this change.
Change-Id: I3d3b2111f6f6bf8a0d7039295d34d5168c191651
Add the ABI to the leak report so that it can be piped through
development/scripts/stack.
Bug: 27208635
Change-Id: I2e050a377305d48d2f904f34ea921f64e13dd00e
Combine similar leaks (those with identical stack traces) into a single
leak report, and sort the resulting leaks by total leak size across all
similar leaks and their references.
Bug: 27208635
Change-Id: Ia2bf2ccf3fcbc110d1c7ba60e3b77348d1c63d8d
Find leaks that have no references at all, or are only referenced by
other leaks in the same strongly connected component, and hide all
referenced leaks.
Bug: 27208635
Change-Id: Ifbfd14e24e2ba0f8af7c1b887e57f34362720f2d
The collection thread should unblock the parent when it fails in order
to prevent a 100 second timeout delay. Also reduce the timeout to 30
seconds, and fix a few log messages.
Bug: 27208635
Change-Id: I47f9ce4f645c453810fec57bef557c32a665eefb
(cherry picked from commit b1b7923efe)
libmemunreachable uses an imprecise mark and sweep pass over all memory
allocated by jemalloc in order to find unreachable allocations.
Bug: 27208635
Change-Id: Ia70bbf31f5b40ff71dab28cfd6cd06c5ef01a2d4
(cherry picked from commit bcb4ed3eaa)
