https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111155
Bug ID: 111155
Summary: RFE: better diagrams for string operations
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: analyzer
Assignee: dmalcolm at gcc dot gnu.org
Reporter: dmalcolm at gcc dot gnu.org
Target Milestone: ---
See
https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=99a3fcb8ff0bf27407c525415384372189e2c3cc
The generated diagrams could be improved.
Specifically:
- we should show the index of the insertion point into buf of the strcat
string. This could be done by looking at hard boundaries, and ensuring that we
show the index on each side of a hard boundary when the index is within the
valid area (with ellipsis cells for other runs)
- we could show the existing content of the valid region, visualizing:
- the string from the strcpy that is untouched by the strcat,
- the existing NUL from the strcpy that is being overwritten by the strcat,
and
- the uninitialized bytes that are being overwritten by the strcat
