forked from OSchip/llvm-project
161cca266a
Summary: This changes a few things to improve memory footprint and performances on Android, and fixes a test compilation error: - add `stdlib.h` to `wrappers_c_test.cc` to address https://bugs.llvm.org/show_bug.cgi?id=42810 - change Android size class maps, based on benchmarks, to improve performances and lower the Svelte memory footprint. Also change the 32-bit region size for said configuration - change the `reallocate` logic to reallocate in place for sizes larger than the original chunk size, when they still fit in the same block. This addresses patterns from `memory_replay` dumps like the following: ``` 202: realloc 0xb48fd000 0xb4930650 12352 202: realloc 0xb48fd000 0xb48fd000 12420 202: realloc 0xb48fd000 0xb48fd000 12492 202: realloc 0xb48fd000 0xb48fd000 12564 202: realloc 0xb48fd000 0xb48fd000 12636 202: realloc 0xb48fd000 0xb48fd000 12708 202: realloc 0xb48fd000 0xb48fd000 12780 202: realloc 0xb48fd000 0xb48fd000 12852 202: realloc 0xb48fd000 0xb48fd000 12924 202: realloc 0xb48fd000 0xb48fd000 12996 202: realloc 0xb48fd000 0xb48fd000 13068 202: realloc 0xb48fd000 0xb48fd000 13140 202: realloc 0xb48fd000 0xb48fd000 13212 202: realloc 0xb48fd000 0xb48fd000 13284 202: realloc 0xb48fd000 0xb48fd000 13356 202: realloc 0xb48fd000 0xb48fd000 13428 202: realloc 0xb48fd000 0xb48fd000 13500 202: realloc 0xb48fd000 0xb48fd000 13572 202: realloc 0xb48fd000 0xb48fd000 13644 202: realloc 0xb48fd000 0xb48fd000 13716 202: realloc 0xb48fd000 0xb48fd000 13788 ... ``` In this situation we were deallocating the old chunk, and allocating a new one for every single one of those, but now we can keep the same chunk (we just updated the header), which saves some heap operations. Reviewers: hctim, morehouse, vitalybuka, eugenis, cferris, rengolin Reviewed By: morehouse Subscribers: srhines, delcypher, #sanitizers, llvm-commits Tags: #llvm, #sanitizers Differential Revision: https://reviews.llvm.org/D67293 llvm-svn: 371628 |
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| .. | ||
| tests | ||
| CMakeLists.txt | ||
| allocator_config.h | ||
| atomic_helpers.h | ||
| bytemap.h | ||
| checksum.cpp | ||
| checksum.h | ||
| chunk.h | ||
| combined.h | ||
| common.cpp | ||
| common.h | ||
| crc32_hw.cpp | ||
| flags.cpp | ||
| flags.h | ||
| flags.inc | ||
| flags_parser.cpp | ||
| flags_parser.h | ||
| fuchsia.cpp | ||
| fuchsia.h | ||
| interface.h | ||
| internal_defs.h | ||
| linux.cpp | ||
| linux.h | ||
| list.h | ||
| local_cache.h | ||
| mutex.h | ||
| platform.h | ||
| primary32.h | ||
| primary64.h | ||
| quarantine.h | ||
| release.h | ||
| report.cpp | ||
| report.h | ||
| secondary.cpp | ||
| secondary.h | ||
| size_class_map.h | ||
| stats.h | ||
| string_utils.cpp | ||
| string_utils.h | ||
| tsd.h | ||
| tsd_exclusive.h | ||
| tsd_shared.h | ||
| vector.h | ||
| wrappers_c.cpp | ||
| wrappers_c.h | ||
| wrappers_c.inc | ||
| wrappers_c_bionic.cpp | ||
| wrappers_c_checks.h | ||
| wrappers_cpp.cpp | ||