| commit | 64de0064f315f57044294879d9ff4eacb454d45b | |
| author | Ed Maste <emaste@FreeBSD.org> | |
| Mon, 17 Jan 2022 22:36:45 +0000 (17 17:36 -0500) | ||
| committer | Ed Maste <emaste@FreeBSD.org> | |
| Tue, 18 Jan 2022 22:07:13 +0000 (18 17:07 -0500) | ||
| tree | 8862e34c48193f81d799db83036a774d416af87d | treesnapshot (tar.gz zip) |
| parent | 42098c4a30de4c79f6d1119d9557e9c3da2fe90c | commitdiff |
[sanitizer] Improve FreeBSD ASLR detection
The kern.elf64.aslr.pie_enable and kern.elf32.aslr.pie_enable sysctls
control the default setting for PIE binary address randomization, but
it is possible to enable or disable ASLR on a per-process basis. So,
use procctl(2) to query whether ASLR is enabled.
(Note that with ASLR enabled but sysctl kern.elf64.aslr.pie_enable=0
a PIE binary will in effect have randomization disabled, and would be
functional with msan. This is not intended as as a user-facing control
though; proccontrol(1) should be used to disable aslr for the process.)
Reviewed By: devnexen
Differential Revision: https://reviews.llvm.org/D117521
The kern.elf64.aslr.pie_enable and kern.elf32.aslr.pie_enable sysctls
control the default setting for PIE binary address randomization, but
it is possible to enable or disable ASLR on a per-process basis. So,
use procctl(2) to query whether ASLR is enabled.
(Note that with ASLR enabled but sysctl kern.elf64.aslr.pie_enable=0
a PIE binary will in effect have randomization disabled, and would be
functional with msan. This is not intended as as a user-facing control
though; proccontrol(1) should be used to disable aslr for the process.)
Reviewed By: devnexen
Differential Revision: https://reviews.llvm.org/D117521
| compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp | diffblobblamehistory |