Bug 120032857 is seeing what appears to be allocations with incorrect
end addresses, leading to a much later crash when it tries to map
a zero page outside the valid virtual address space. Detect allocations
that extend outside the highest or lowest memory mapping and crash
immediately instead.
Test: memunreachable_test
Bug: 120032857
Change-Id: I9be670a025143e7078360a6bf7a83219279614d9
The excessive logging of pages with segfaults is making it hard to
see what caused the problem, only log the first page that segfaults,
the range that was being walked when the first segfault happened,
and the total number of pages that segfaulted.
Bug: 120032857
Test: memunreachable_test --gtest_filter=HeapWalkerTest.segv
Change-Id: I71821a3f5be65f2fbcb36afc4b7b1ffa4a48e660
Bug: http://b/116702964
This breaks when built with C++17, where these constructors are removed.
Looks like libc++ ignored the allocator arguments anyway - so this
should be NFC even with C++17.
Test: memunreachable_test on the host and Sailfish with C++14, C++17
Change-Id: I638326a900781f64d0562b5ec38e990659967039
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 a single chunk mapping
to appear as multiple mappings. The heap iterator has to expand the
requested range to cover the beginning of the chunk to find the chunk
metadata, which will lead to duplicate identical allocations being
reported from iterating over each of the split mappings. Silently
ignore identical allocations, and only warn on non-identical allocations
that overlap.
Bug: 28269332
Change-Id: Ied2ab9270f65d00a887c7ce1a93fbf0617d69be0
(cherry picked from commit cecd64012d)
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)
allocator::map reversed Key and T from std::map
Bug: 27208635
Change-Id: I4e4db704539d01b060cb948aa573cb674da48c7d
(cherry picked from commit 4c5bccdd86)
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)
libmemunreachable uses an imprecise mark and sweep pass over all memory
allocated by jemalloc in order to find unreachable allocations.
Change-Id: Ia70bbf31f5b40ff71dab28cfd6cd06c5ef01a2d4
