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* [Bug analyzer/106301] New: RFE: analyzer support of mmap @ 2022-07-14 15:03 dmalcolm at gcc dot gnu.org 2022-07-14 15:06 ` [Bug analyzer/106301] " dmalcolm at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: dmalcolm at gcc dot gnu.org @ 2022-07-14 15:03 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106301 Bug ID: 106301 Summary: RFE: analyzer support of mmap Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: analyzer Assignee: dmalcolm at gcc dot gnu.org Reporter: dmalcolm at gcc dot gnu.org Blocks: 106003 Target Milestone: --- Now that the analyzer can track uses of file-descriptors, we may want to special-case mmap: https://www.man7.org/linux/man-pages/man2/mmap.2.html void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset); If (flags & MAP_ANONYMOUS) is false, then "fd" is required to be an open file descriptor (and the access direction must match that expressed by "prot"). If (flags & MAP_ANONYMOUS) is true, then some implementations require "fd" to be -1. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106003 [Bug 106003] RFE: -fanalyzer could complain about misuse of file-descriptors ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug analyzer/106301] RFE: analyzer support of mmap 2022-07-14 15:03 [Bug analyzer/106301] New: RFE: analyzer support of mmap dmalcolm at gcc dot gnu.org @ 2022-07-14 15:06 ` dmalcolm at gcc dot gnu.org 2022-07-14 19:34 ` egallager at gcc dot gnu.org 2022-11-15 19:11 ` dmalcolm at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: dmalcolm at gcc dot gnu.org @ 2022-07-14 15:06 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106301 --- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> --- Potentially we could also track the allocated region, and complain if it is leaked. I think this would require handling of mmap/munmap in sm-malloc.cc (so that we can detect leaks), and support in the region-model code for memory-mapped regions (for aliasing support) ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug analyzer/106301] RFE: analyzer support of mmap 2022-07-14 15:03 [Bug analyzer/106301] New: RFE: analyzer support of mmap dmalcolm at gcc dot gnu.org 2022-07-14 15:06 ` [Bug analyzer/106301] " dmalcolm at gcc dot gnu.org @ 2022-07-14 19:34 ` egallager at gcc dot gnu.org 2022-11-15 19:11 ` dmalcolm at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: egallager at gcc dot gnu.org @ 2022-07-14 19:34 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106301 Eric Gallager <egallager at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |egallager at gcc dot gnu.org --- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> --- mmap has some portability issues to be aware of: https://www.gnu.org/software/gnulib/manual/html_node/mmap.html (besides the ones listed there, another one I've come across is sometimes some headers shortening their name for MAP_ANONYMOUS to just MAP_ANON) ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug analyzer/106301] RFE: analyzer support of mmap 2022-07-14 15:03 [Bug analyzer/106301] New: RFE: analyzer support of mmap dmalcolm at gcc dot gnu.org 2022-07-14 15:06 ` [Bug analyzer/106301] " dmalcolm at gcc dot gnu.org 2022-07-14 19:34 ` egallager at gcc dot gnu.org @ 2022-11-15 19:11 ` dmalcolm at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: dmalcolm at gcc dot gnu.org @ 2022-11-15 19:11 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106301 Bug 106301 depends on bug 106302, which changed state. Bug 106302 Summary: RFE: provide a way for -fanalyzer to use target flags https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106302 What |Removed |Added ---------------------------------------------------------------------------- Status|WAITING |RESOLVED Resolution|--- |FIXED ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-11-15 19:11 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-07-14 15:03 [Bug analyzer/106301] New: RFE: analyzer support of mmap dmalcolm at gcc dot gnu.org 2022-07-14 15:06 ` [Bug analyzer/106301] " dmalcolm at gcc dot gnu.org 2022-07-14 19:34 ` egallager at gcc dot gnu.org 2022-11-15 19:11 ` dmalcolm at gcc dot gnu.org
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