delta/compiler-rt.git/lib/fuzzer/scripts, branch google/stable

[libFuzzer] Fix DataFlow.cpp logic when tracing long inputs.

2019-04-12T21:00:12+00:00

Summary:
1. Do not create DFSan labels for the bytes which we do not trace. This is where we run out of labels at the first place.
2. When dumping the traces on the disk, make sure to offset the label identifiers by the number of the first byte in the trace range.
3. For the last label, make sure to write it at the last position of the trace bit string, as that label represents the input size, not any particular byte.

Also fixed the bug with division in python which I've introduced when migrated the scripts to Python3 (`//` is required for integral division).

Otherwise, the scripts are wasting too much time unsuccessfully trying to
collect and process traces from the long inputs. For more context, see
https://github.com/google/oss-fuzz/issues/1632#issuecomment-481761789

Reviewers: kcc

Reviewed By: kcc

Subscribers: delcypher, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D60538

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@358311 91177308-0d34-0410-b5e6-96231b3b80d8

[libFuzzer] Another follow up fix for Data Flow scripts in Py3.

2019-04-04T22:55:18+00:00

Reviewers: Dor1s

Reviewed By: Dor1s

Subscribers: delcypher, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D60289

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@357732 91177308-0d34-0410-b5e6-96231b3b80d8

[libFuzzer] Fix output format in data flow merge script after Py3 change.

2019-04-04T22:21:27+00:00

Reviewers: Dor1s

Reviewed By: Dor1s

Subscribers: delcypher, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D60288

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@357730 91177308-0d34-0410-b5e6-96231b3b80d8

[libFuzzer] Make DataFlow scripts Python3 compatible.

2019-04-04T21:20:36+00:00

Summary:
Python2 will hit end of life soon: https://pythonclock.org/
This change also makes the integration with OSS-Fuzz a bit simpler:
https://github.com/google/oss-fuzz/issues/1632

Reviewers: morehouse, kcc

Reviewed By: morehouse

Subscribers: delcypher, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D60282

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@357726 91177308-0d34-0410-b5e6-96231b3b80d8

Update the file headers across all of the LLVM projects in the monorepo

2019-01-19T08:50:56+00:00

to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@351636 91177308-0d34-0410-b5e6-96231b3b80d8

[fuzzer] Python 3 print fixes

2018-06-17T09:11:56+00:00

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@334902 91177308-0d34-0410-b5e6-96231b3b80d8

[fuzzer] Fix collect_data_flow.py for python 3

2018-06-17T08:41:56+00:00

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@334901 91177308-0d34-0410-b5e6-96231b3b80d8

[libFuzzer] initial implementation of -data_flow_trace. It parses the data flow trace and prints the summary, but doesn't use the information in any other way yet

2018-06-06T01:23:29+00:00

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@334058 91177308-0d34-0410-b5e6-96231b3b80d8

[libFuzzer] add collect_data_flow.py that allows to run the data-flow tracer several times on subsets of inputs bytes, to overcome DFSan out-of-label failures

2018-05-31T01:27:07+00:00

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@333616 91177308-0d34-0410-b5e6-96231b3b80d8

[libFuzzer] DataFlow tracer now tags a subset of the input. A separate script merges traces from the subsets

2018-05-24T01:43:48+00:00

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@333149 91177308-0d34-0410-b5e6-96231b3b80d8