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2869 Commits

Author SHA1 Message Date
Jonas Jensen
ff7b6e2ce7 C++: Add new queries in 1.23 to legacy suites 
I didn't add `JapaneseEraDate.ql` since it's not displayed on LGTM by
default.
 2019-12-09 15:36:51 +01:00
Henning Makholm
6bdf186d1e C tests: generalize arguments tests 
With the coming `codeql test` support, the `predefined_macros` file will not
necessarily be located under a `tools` directory. Change the test to hide more
of its actual path, so it will work in both cases.
 2019-12-06 01:21:17 +01:00
Robert Marsh
28fb3d606a C++: add fread and printf alias models 2019-12-05 12:14:33 -08:00
Robert Marsh
52a74718da C++: Move sources into DefaultTaintTracking 2019-12-05 12:14:25 -08:00
Robert Marsh
39b400ca69 C++: Add DefinitionByReferenceNode to IR dataflow 2019-12-05 11:56:57 -08:00
Robert Marsh
055c1d0efa Merge pull request #2488 from geoffw0/speedup2 
CPP: Speed up SensitiveExprs.qll
 2019-12-04 14:09:32 -08:00
Robert Marsh
420a0bb74c C++: handle namespace vars in DefautlTaintTracking 2019-12-04 13:16:12 -08:00
Dave Bartolomeo
cbb6797ca8 Merge from master and resolve conflicts 2019-12-04 10:14:52 -07:00
Dave Bartolomeo
50dc5e2ba3 Merge pull request #2438 from rdmarsh2/rdmarsh/ir-line-number-ids 
C++/C#: use line numbers for instruction IDs
 2019-12-03 18:48:28 -08:00
Robert Marsh
d99a90bfea C++: handle global vars in DefaultTaintTracking 2019-12-03 16:08:43 -08:00
Robert Marsh
722cc91eae C++: make getLineRank private 2019-12-03 10:53:08 -08:00
Jonas Jensen
57917bec17 Merge pull request #2480 from hvitved/dataflow/performance-tweaks 
Data flow: Various performance tweaks
 2019-12-03 18:44:11 +01:00
Geoffrey White
8ddf877756 CPP: Autoformat. 2019-12-03 12:17:37 +00:00
Geoffrey White
cc43e1116b CPP: Do the logic at the target, rather than the access, as there are likely fewer. 2019-12-03 10:52:40 +00:00
Geoffrey White
20eb39d37e CPP: Bypass some of the complexity in 'toString'. 2019-12-03 10:44:59 +00:00
Geoffrey White
6e6c1693f4 CPP: Speed up SensitiveExprs.qll 'suspicious' and 'nonSuspicious' mechanism. 2019-12-03 10:43:36 +00:00
Geoffrey White
b752a6c8ed Merge pull request #2381 from jbj/StackVariable 
C++: Add StackVariable class, preferred over LocalScopeVariable
 2019-12-03 10:35:16 +00:00
Geoffrey White
2faae4dcb1 CPP: Autoformat. 2019-12-03 09:00:43 +00:00
Dave Bartolomeo
acc3d23877 Clarify comment 2019-12-02 11:53:43 -08:00
Tom Hvitved
b3990c5a1d Data flow: Revert reordering changes in flowStore and flowRead 2019-12-02 14:25:59 +01:00
Tom Hvitved
5baa133e6c Data flow: Sync files 2019-12-02 13:41:17 +01:00
Jonas Jensen
5b24b1efc3 Merge remote-tracking branch 'upstream/rc/1.23' into mergeback-20191202 
Conflicts solved:
	javascript/extractor/src/com/semmle/js/extractor/Main.java
	javascript/ql/test/query-tests/Statements/UseOfReturnlessFunction/tst.js
 2019-12-02 09:57:34 +01:00
Anders Schack-Mulligen
333d0a69d2 Java/C++/C#: Bugfix for field flow through reverse read. 2019-11-29 09:38:24 +01:00
Geoffrey White
3477c4a8fb Update cpp/ql/src/semmle/code/cpp/commons/Alloc.qll 
Co-Authored-By: Jonas Jensen <jbj@github.com>
 2019-11-28 17:30:36 +00:00
Geoffrey White
aae9f88413 CPP: Model 'alloca'. 2019-11-28 17:27:37 +00:00
Jonas Jensen
763b18cd11 Merge remote-tracking branch 'upstream/master' into StackVariable 
Conflicts:
      change-notes/1.24/analysis-cpp.md
      cpp/ql/src/Security/CWE/CWE-131/NoSpaceForZeroTerminator.ql
 2019-11-28 17:51:20 +01:00
Jonas Jensen
d816701e07 Revert "C++: Use StackVariable in Nullness.qll" 
It looks like allowing statics in `Nullness.qll` is fine since it's a
"may be null" analysis rather than a "must be null" analysis.

This reverts commit f5b9837e19.
 2019-11-28 17:44:42 +01:00
Jonas Jensen
d22df24cab Merge pull request #2467 from geoffw0/speedup1 
CPP: Speed up isCompiledAsC.
 2019-11-28 17:31:27 +01:00
Geoffrey White
b1c992e85f CPP: Speed up isCompiledAsC (x3). 2019-11-28 11:28:38 +00:00
Dave Bartolomeo
aa6bd07971 Merge remote-tracking branch 'upstream/master' into dbartol/May-Must 2019-11-26 14:07:13 -07:00
Robert Marsh
e368d5dda0 C++: simplify getDisplayOrderInBlock 2019-11-26 16:02:30 -05:00
Jonas Jensen
c05cc77a91 Merge pull request #2421 from dbartol/dbartol/IndirectAlias 
C++/C#: Cleanup in preparation for indirect alias analysis
 2019-11-26 21:59:17 +01:00
Dave Bartolomeo
f3b4140948 C++/C#: Consistent handling of "may" vs. "must" memory accesses 
In the IR, some memory accesses are "must" accesses (the entire memory location is always read or written), and some are "may" accesses (some, all, or none of the bits in the location are written). We previously had to special case specific "may" accesses in a few places. This change regularizes our handling of "may" accesses.

The `MemoryAccessKind` enumeration now describes only the extent of the access (the set of locations potentially accessed), but does not distinguish "must" from "may". The new predicates `Operand.hasMayMemoryAccess()` and `Instruction.hasResultMayMemoryAccess()` hold when the access is a "may" access.

Unaliased SSA now correctly ignores variables that are ever accessed via a "may" access.

Aliased SSA now distinguishes `MemoryLocation`s for "may" and "must" accesses. I've refactored `getOverlap()` into the core `getExtentOverlap()`, which considers only the extent, but not the "may" vs. "must", and `getOverlap()`, which tweaks the result of `getExtentOverlap()` based on "may" vs. "must" and read-only locations.

When determining the overlap between a `Phi` operand and its definition, we now use the result of the defining `Chi` instruction, if one exists. This gives exact definitions for `Phi` operands for virtual variables.
 2019-11-26 12:13:07 -07:00
Dave Bartolomeo
4e1ee7a998 C++/C#: Fix formatting 2019-11-26 10:48:24 -07:00
Jonas Jensen
b1745f588c Merge pull request #2402 from geoffw0/nospace 
CPP: Make NoSpaceForZeroTerminator.ql more conservative.
 2019-11-26 13:36:05 +01:00
Robert Marsh
60b384a6e5 C++/C#: use line numbers for instruction IDs 
This should reduce the number of merge conflicts in the IR tests resulting
from instruction ID changes due to inserting or removing instructions
 2019-11-25 18:27:59 -05:00
Dave Bartolomeo
7d48220a76 C++/C#: Make QLDoc conform to style guide 2019-11-25 11:26:45 -07:00
Dave Bartolomeo
44c1c5a7ab C++: Update points_to.ql test to use new bit offset format 2019-11-25 11:13:02 -07:00
Dave Bartolomeo
521fbb125e C++/C#: Fix formatting 2019-11-25 11:12:23 -07:00
semmle-qlci
d58a6b02bf Merge pull request #2396 from hvitved/dataflow/erased-type-class 
Approved by aschackmull, jbj
 2019-11-25 15:22:13 +00:00
Geoffrey White
1d26d4c5e4 Merge pull request #2404 from jbj/signed-overflow-macro 
C++: Fix SignedOverflowCheck.ql performance
 2019-11-25 15:15:57 +00:00
Tom Hvitved
a26efdf4c1 Java/C++/C#: Rename DataFlowErasedType back to DataFlowType 2019-11-25 11:43:58 +01:00
Jonas Jensen
5ee19c5a66 C++: Stricter loop-variant check 
The `loopVariant` predicate in `ComparisonWithWiderType.ql` is intended
to identify loop counters, but it was too much of a stretch to apply it
to any subexpression of the small side of the comparison.

This change fixes two false positives on arvidn/libtorrent and many
others seen in the wild (on Linux, CoreCLR, ffmpeg, ...).
 2019-11-25 11:31:41 +01:00
Jonas Jensen
8f3998915b Merge pull request #2376 from geoffw0/qhelpms2 
CPP: Recommendations and examples for TlsSettingsMisconfiguration.qhelp and UseOfDeprecatedHardCodedProtocol.qhelp
 2019-11-25 08:17:32 +01:00
Dave Bartolomeo
eda47bfc51 C++: Add SSA sanity tests to IR tests 2019-11-22 16:10:51 -07:00
Dave Bartolomeo
bd78f68975 C++/C#: Fix formatting 2019-11-22 16:08:49 -07:00
Dave Bartolomeo
df21835759 C++/C#: Refactor some integer constant code 
Make `bitsToBytesAndBits` omit the leftover bits if zero.
 2019-11-22 13:23:00 -07:00
Dave Bartolomeo
51ff262cbc C++/C#: Add IR SSA sanity tests 2019-11-22 13:16:05 -07:00
Dave Bartolomeo
bc48c25690 C++/C#: Make IRVariable and its derived classes non-abstract 2019-11-22 12:13:39 -07:00
Dave Bartolomeo
12daa76b70 C++: Make duplicateOperand query report function name 2019-11-22 11:00:01 -07:00