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11 Commits

Author SHA1 Message Date
Vitaly Buka
96928abb4d [NFC][sanitizer] Pass user region into OnMapSecondary 2023-06-21 13:50:42 -07:00
Vitaly Buka
38dfcf96df [NFC][sanitizer] Add OnMapSecondary callback 
Now it implemented as OnMap everywhere, but in follow up patches
we can optimize Asan handler.
 2023-06-21 13:33:41 -07:00
Jin Xin Ng
7639265af4
[sanitizer] Implement __sanitizer_get_allocated_size_fast 
The primary motivation for this change is to allow FreeHooks to obtain
the allocated size of the pointer being freed in a fast, efficient manner.

Differential Revision: https://reviews.llvm.org/D151360
 2023-05-26 00:19:47 +00:00
Fangrui Song
8c63dc6f6d Internalize AllocationBegin functions after D147005 
Reviewed By: thurston

Differential Revision: https://reviews.llvm.org/D148195
 2023-04-13 10:28:58 -07:00
Thurston Dang
d644ab022a Update __sanitizer_get_allocated_begin to return const void* 
D147005 introduced __sanitizer_get_allocated_begin, with a return
value of void*. This involved a few naughty casts that dropped the
const. This patch adds back the const qualifier.

Differential Revision: https://reviews.llvm.org/D147489
 2023-04-04 00:43:36 +00:00
Jie Fu
c81a322476 [compiler-rt] Fix -Wcast-qual after D147005 (NFC) 
/home/jiefu/llvm-project/compiler-rt/lib/lsan/lsan_allocator.cpp:161:18: error: cast from 'const void *' to 'void *' drops const qualifier [-Werror,-Wcast-qual]
  return (void *)beg;
                 ^
1 error generated.
 2023-04-04 07:40:34 +08:00
Thurston Dang
415b1cfd57 Add __sanitizer_get_allocated_begin API and implementations 
This function will return the start of the allocation, if given a pointer that lies within an allocation. Otherwise, it returns NULL.

It will be useful for detecting dynamic TLS allocations in glibc >=2.25, which
uses malloc (see https://github.com/google/sanitizers/issues/1409#issuecomment-1214244142).

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D147005
 2023-04-03 21:27:51 +00:00
Fangrui Song
de5416cb59 [dfsan] Support Linux AArch64 
compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake:ALL_DFSAN_SUPPORTED_ARCH
allows AArch64 but currently the instrumentation will crash.

Port Linux AArch64 memory mappings from msan but use
SizeClassAllocator64 for a slightly more efficient allocator (used by
asan/lsan). Change dfsan/lit.cfg.py to allow Linux aarch64. All tests
should pass.

* dfsan/origin_invalid.c uses x86_64 assembly. Just make it x86_64 specific.
* dfsan/interceptors.c our mallinfo interceptor takes an argument
  instead of returning a struct. This does not work on AArch64 which
  uses different registers for the two function types. Disable AArch64
  as msan/Linux/mallinfo.cpp does.

Reviewed By: #sanitizers, vitalybuka

Differential Revision: https://reviews.llvm.org/D140770
 2023-01-03 13:17:39 -08:00
Vitaly Buka
6318001209 [sanitizer] Support IsRssLimitExceeded in all sanitizers 
Reviewed By: kstoimenov

Differential Revision: https://reviews.llvm.org/D115000
 2021-12-03 12:45:44 -08:00
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