2 Commits

Author	SHA1	Message	Date
Andrew Browne	45f6d5522f	[DFSan] Change shadow and origin memory layouts to match MSan. ... Previously on x86_64: +--------------------+ 0x800000000000 (top of memory) | application memory | +--------------------+ 0x700000008000 (kAppAddr) | | | unused | | | +--------------------+ 0x300000000000 (kUnusedAddr) | origin | +--------------------+ 0x200000008000 (kOriginAddr) | unused | +--------------------+ 0x200000000000 | shadow memory | +--------------------+ 0x100000008000 (kShadowAddr) | unused | +--------------------+ 0x000000010000 | reserved by kernel | +--------------------+ 0x000000000000 MEM_TO_SHADOW(mem) = mem & ~0x600000000000 SHADOW_TO_ORIGIN(shadow) = kOriginAddr - kShadowAddr + shadow Now for x86_64: +--------------------+ 0x800000000000 (top of memory) | application 3 | +--------------------+ 0x700000000000 | invalid | +--------------------+ 0x610000000000 | origin 1 | +--------------------+ 0x600000000000 | application 2 | +--------------------+ 0x510000000000 | shadow 1 | +--------------------+ 0x500000000000 | invalid | +--------------------+ 0x400000000000 | origin 3 | +--------------------+ 0x300000000000 | shadow 3 | +--------------------+ 0x200000000000 | origin 2 | +--------------------+ 0x110000000000 | invalid | +--------------------+ 0x100000000000 | shadow 2 | +--------------------+ 0x010000000000 | application 1 | +--------------------+ 0x000000000000 MEM_TO_SHADOW(mem) = mem ^ 0x500000000000 SHADOW_TO_ORIGIN(shadow) = shadow + 0x100000000000 Reviewed By: stephan.yichao.zhao, gbalats Differential Revision: https://reviews.llvm.org/D104896	2021-06-25 17:00:38 -07:00
Jianzhou Zhao	1fb612d060	[dfsan] Add a DFSan allocator ... This is a part of https://reviews.llvm.org/D101204 Reviewed By: morehouse Differential Revision: https://reviews.llvm.org/D101666	2021-05-05 00:51:45 +00:00