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8 Commits

Author SHA1 Message Date
George Balatsouras 5b4dda550e [dfsan] Add full fast8 support 
Complete support for fast8:
- amend shadow size and mapping in runtime
- remove fast16 mode and -dfsan-fast-16-labels flag
- remove legacy mode and make fast8 mode the default
- remove dfsan-fast-8-labels flag
- remove functions in dfsan interface only applicable to legacy
- remove legacy-related instrumentation code and tests
- update documentation.

Reviewed By: stephan.yichao.zhao, browneee

Differential Revision: https://reviews.llvm.org/D103745
 2021-06-07 17:20:54 -07:00
Jianzhou Zhao 79debe8d7b [dfsan] Turn off all dfsan test cases on non x86_64 OSs 
https://reviews.llvm.org/D101666 enables sanitizer allocator.
This broke all test cases on non x86-64.
 2021-05-05 05:30:53 +00:00
Matt Morehouse 2df6efedef [DFSan] Re-enable event_callbacks test. 
Mark the dest pointers for memcpy and memmove as volatile, to avoid dead
store elimination.  Fixes https://bugs.llvm.org/show_bug.cgi?id=47488.
 2020-09-11 09:15:05 -07:00
Jeremy Morse 82390454f0 [DFSan] XFail a test that's suffering too much optimization 
See https://bugs.llvm.org/show_bug.cgi?id=47488 , rGfb109c42d9 is
optimizing out part of this test.
 2020-09-11 11:25:24 +01:00
Matt Morehouse 30bb737a75 [DFSan] Add __dfsan_cmp_callback. 
Summary:
When -dfsan-event-callbacks is specified, insert a call to
__dfsan_cmp_callback on every CMP instruction.

Reviewers: vitalybuka, pcc, kcc

Reviewed By: kcc

Subscribers: hiraditya, #sanitizers, eugenis, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D75389
 2020-02-28 15:49:44 -08:00
Matt Morehouse f668baa459 [DFSan] Add __dfsan_mem_transfer_callback. 
Summary:
When -dfsan-event-callbacks is specified, insert a call to
__dfsan_mem_transfer_callback on every memcpy and memmove.

Reviewers: vitalybuka, kcc, pcc

Reviewed By: kcc

Subscribers: eugenis, hiraditya, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D75386
 2020-02-28 15:48:25 -08:00
Matt Morehouse 52f889abec [DFSan] Add __dfsan_load_callback. 
Summary:
When -dfsan-event-callbacks is specified, insert a call to
__dfsan_load_callback() on every load.

Reviewers: vitalybuka, pcc, kcc

Reviewed By: vitalybuka, kcc

Subscribers: hiraditya, #sanitizers, llvm-commits, eugenis, kcc

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D75363
 2020-02-28 14:26:09 -08:00
Matt Morehouse 470db54cbd [DFSan] Add flag to insert event callbacks. 
Summary:
For now just insert the callback for stores, similar to how MSan tracks
origins.  In the future we may want to add callbacks for loads, memcpy,
function calls, CMPs, etc.

Reviewers: pcc, vitalybuka, kcc, eugenis

Reviewed By: vitalybuka, kcc, eugenis

Subscribers: eugenis, hiraditya, #sanitizers, llvm-commits, kcc

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D75312
 2020-02-27 17:14:19 -08:00