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
The stack test puts a pointer to an allocation on the stack, checks
that there are no leaks, then lets it go out of scope and checks
that libmemunreachable can find a leak. This works on arm64, but
on arm32 the pointer on the stack doesn't get overwitten and the
leak is not detected. Rewrite the pointer to be NULL instead.
Test: memunreachable_test
Change-Id: I5959a34cbb572a5d8670270077a85d247a3a4880
Putting libmemunreachable in the global C++ namespace was an oversight,
move it into namespace android.
Test: m -j checkbuild
Change-Id: I0799906f6463178cb04a719bb4054cad33a50dbe
Vendor blobs on ryu mprotect heap pages, causing segfaults when dumping
unreachable memory. Handle segfaults within HeapWalker by mapping a
zero page over any unreadable pages. HeapWalker runs in the forked
process, so the mapping will not affect the original process.
Bug: 28269332
Change-Id: I16245af722123f2ad467cbc6f245a70666c55544
(cherry picked from commit ba5d9ff6d9)
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
(cherry picked from commit 7a22e81c20)
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
(cherry picked from commit 8e8f34c558)
Compile some tests for the host to ease debugging with valgrind or gdb.
Bug: 27208635
Change-Id: Ib46fcfa333ceb721f26efca00b2fa60b9fba44e6
(cherry picked from commit b8e20f557f)
libmemunreachable uses an imprecise mark and sweep pass over all memory
allocated by jemalloc in order to find unreachable allocations.
Change-Id: Ia70bbf31f5b40ff71dab28cfd6cd06c5ef01a2d4
