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C++: Disable cpp/implicit-function-declaration on build mode none databases #21553

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Merged
geoffw0 merged 10 commits into from
Apr 10, 2026
Merged

C++: Disable cpp/implicit-function-declaration on build mode none databases #21553

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5a77128
C++: Disable cpp/implicit-function-declaration on BMN databases.
geoffw0 Mar 23, 2026
39056e4
C++: Change note.
geoffw0 Mar 23, 2026
bb9873d
C++: Increase the query precision to high.
geoffw0 Mar 27, 2026
50681a3
C++: Add note to the .qhelp.
geoffw0 Mar 27, 2026
4f3108c
C++: Update change note.
geoffw0 Mar 27, 2026
a9cce1c
C++: Undo increasing query precision.
geoffw0 Mar 27, 2026
2d02056
C++: Second change note.
geoffw0 Apr 2, 2026
e83658e
C++: Upgrade query precision.
geoffw0 Apr 2, 2026
9eabfc5
Update cpp/ql/src/Likely Bugs/Underspecified Functions/ImplicitFuncti…
geoffw0 Apr 2, 2026
56af9a8
Update cpp/ql/src/Likely Bugs/Underspecified Functions/ImplicitFuncti…
geoffw0 Apr 2, 2026
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6 changes: 6 additions & 0 deletions cpp/ql/src/Likely Bugs/Underspecified Functions/ImplicitFunctionDeclaration.ql
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,11 @@ import TooFewArguments
import TooManyArguments
import semmle.code.cpp.commons.Exclusions

/*
* This query is not compatible with build mode: none databases, and has
* no results on those databases.
*/

predicate locInfo(Locatable e, File file, int line, int col) {
e.getFile() = file and
e.getLocation().getStartLine() = line and
Expand All @@ -39,6 +44,7 @@ predicate isCompiledAsC(File f) {
from FunctionDeclarationEntry fdeIm, FunctionCall fc
where
isCompiledAsC(fdeIm.getFile()) and
not any(Compilation c).buildModeNone() and
not isFromMacroDefinition(fc) and
fdeIm.isImplicit() and
sameLocation(fdeIm, fc) and
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4 changes: 4 additions & 0 deletions cpp/ql/src/change-notes/2026-03-23-implicit-function-declaration.md
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@@ -0,0 +1,4 @@
---
category: minorAnalysis
---
* The "Implicit function declaration" (`cpp/implicit-function-declaration`) query no longer produces results on `build mode: none` databases. These results were found to be very noisy and fundamentally imprecise in this mode.
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