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hardened_malloc
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353 Commits (d4b8fee1c4fe910efd0ccf7e897ce88b5178ac79)

Author SHA1 Message Date
Daniel Micay da8e9aa1d8 document allocator state region 2018-10-15 15:44:31 -04:00
Daniel Micay 1c9e0d88a5 use the initial region table slots again 2018-10-15 15:18:45 -04:00
Daniel Micay da0df69d22 move region hash tables into main state region 2018-10-15 15:07:59 -04:00
Daniel Micay 1e5dec97e0 move slab allocator state into main state region 2018-10-15 14:58:22 -04:00
Daniel Micay e8eca2d430 explain the production-oriented design rationale 2018-10-15 04:07:20 -04:00
Daniel Micay fde9fc2ece protect region allocator state with random guards 2018-10-14 22:41:17 -04:00
Daniel Micay 124d958da1 document free slabs quarantine 2018-10-14 22:19:10 -04:00
Daniel Micay 3504465584 document progress on protected allocator state 2018-10-14 22:15:48 -04:00
Daniel Micay da6fd5b5ef move slab allocator state to a dedicated mapping 2018-10-14 22:06:38 -04:00
Daniel Micay 1190966846 rename region_info to region_metadata 2018-10-14 22:06:38 -04:00
Daniel Micay a083ff79e1 move region allocator state to a dedicated mapping 2018-10-14 22:06:33 -04:00
Daniel Micay d728afae8e add configuration option for testing with UBSan 2018-10-14 18:58:54 -04:00
Daniel Micay 535466fdfd avoid undefined shifts with multi-word bitmaps 2018-10-14 18:58:17 -04:00
Daniel Micay 7798b2693e fix loop exit condition boundary for get_free_slot 2018-10-14 18:49:48 -04:00
Daniel Micay 3c0a448c3e enable more tidy checks 2018-10-14 18:33:40 -04:00
Daniel Micay 9ea2fd6667 write_after_free_check only reads data 2018-10-14 18:30:20 -04:00
Daniel Micay d35674c67e expected_size is not an output parameter 2018-10-14 18:28:01 -04:00
Daniel Micay 8b033c5e44 make ALIGNMENT_CEILING into a function 2018-10-14 18:23:42 -04:00
Daniel Micay 118549451b add tidy target to the Makefile for clang-tidy 2018-10-14 18:05:08 -04:00
Daniel Micay b66ca56ba1 initialize ptr to nullptr in handle_out_of_memory 
It will break out of the loop in the first iteration if there's no
handler or the handler throws an out-of-memory error.
 2018-10-14 18:00:55 -04:00
Daniel Micay 4fbfe4d3ec fix canary space reservation for pvalloc 2018-10-14 17:49:36 -04:00
Daniel Micay f11c448a0d slightly reorganize slab metadata 2018-10-14 15:13:06 -04:00
Daniel Micay 3db3e167ed remove usage of ATOMIC_VAR_INIT 
This was never truly required in practice and has been officially
obsoleted in C17.
 2018-10-13 16:50:49 -04:00
Daniel Micay 65a7014b48 randomize free slabs reuse 2018-10-13 13:57:00 -04:00
Daniel Micay 83df37436d fix usage of pthread_atfork for glibc < 2.28 2018-10-12 16:03:15 -04:00
Daniel Micay 0a64c7d6a1 document the randomized array in the quarantine 2018-10-12 15:10:35 -04:00
Daniel Micay 6669166fe9 move memory_unmap outside of lock scope 2018-10-12 15:06:51 -04:00
Daniel Micay b2007ad3d9 implement randomization for the region quarantine 2018-10-12 15:03:59 -04:00
Daniel Micay ac2b940f0f fix compatibility with older GCC versions 
Avoid relying on compiler extensions supporting more flexible usage of
constants closer to how it works in C++.
 2018-10-11 18:12:49 -04:00
Daniel Micay e47c783524 add test for delete size mismatch 2018-10-11 01:45:47 -04:00
Daniel Micay 7606bf4c1f clean up includes in new.cc 2018-10-11 01:35:25 -04:00
Daniel Micay 54c78fe1c2 distinguish between mmap / mremap errors 2018-10-10 19:05:35 -04:00
Daniel Micay 2381d973b1 expand on metadata address space security 2018-10-10 18:55:31 -04:00
Daniel Micay 29fd86ab37 document sized deallocation validation 2018-10-10 18:49:17 -04:00
Daniel Micay c74fe56091 minor include style fix 2018-10-10 18:19:56 -04:00
Daniel Micay ddcdd9423c make the memory mapping quarantine more efficient 2018-10-09 14:13:59 -04:00
Daniel Micay 57d5ab769b add write-after-free tests with potential reuse 2018-10-08 17:41:06 -04:00
Daniel Micay 5fa6e01929 clearer name for MREMAP_MAYMOVE threshold 2018-10-08 17:18:13 -04:00
Daniel Micay 1a10c17e8b add quarantine for large allocations 2018-10-08 16:14:07 -04:00
Daniel Micay cc9699f1b4 use multi-word bitmap to support up to 256 slots 2018-10-07 18:50:06 -04:00
Daniel Micay 5e2f03296e remove old debugging code 2018-10-07 16:18:17 -04:00
Daniel Micay fa2796a941 Makefile: add missing dependencies 2018-10-07 11:31:07 -04:00
Daniel Micay cf07ae6007 update configuration in README 2018-10-06 15:38:09 -04:00
Daniel Micay 348f9fa557 add configuration for frequency of guard slabs 2018-10-06 15:36:03 -04:00
Daniel Micay 4ee12e64e0 configuration for guard region sizes 2018-10-06 15:17:55 -04:00
Daniel Micay d18b05eaf4 avoid redundant checks for large realloc 2018-10-06 13:31:16 -04:00
Daniel Micay eb7ced7781 implement in-place growth of large allocations 2018-10-06 13:24:22 -04:00
Daniel Micay 3a936295f8 Makefile: split out shared compiler flags 2018-10-05 02:45:40 -04:00
Daniel Micay 4716ff5b92 explicitly export C++ allocator overrides 
This doesn't make any difference for GCC, but these aren't replaced
outside of the library with Clang without explicitly exporting them.
 2018-10-05 02:23:49 -04:00
Daniel Micay e6e9ac1fc9 support replacing C++ new/delete implementation 
This adds support for sanity checks based on sized deallocation and will
reduce the overhead of calls through the C++ allocator.
 2018-10-05 02:11:29 -04:00