git: a853b4c42569 - stable/13 - ctfconvert: Give bitfield types names distinct from the base type
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Date: Thu, 11 Aug 2022 14:36:25 UTC
The branch stable/13 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=a853b4c425697a76c61ffa4fbd8bf7da5454807a commit a853b4c425697a76c61ffa4fbd8bf7da5454807a Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2022-08-03 00:32:17 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2022-08-11 14:36:11 +0000 ctfconvert: Give bitfield types names distinct from the base type CTF integers have an explicit width and so can be used to represent bitfields. Bitfield types emitted by ctfconvert(1) share the name of the base integer type, so a struct field with type "unsigned int : 15" will have a type named "unsigned int". To avoid ambiguity when looking up types by name, add a suffix to names of bitfield types to distinguish them from the base type. Then, if ctfmerge happens to order bitfield types before the corresponding base type in a CTF file, a name lookup will return the base type, which is always going to be the desired behaviour. PR: 265403 Reported by: cy Sponsored by: The FreeBSD Foundation (cherry picked from commit 1165fc9a526630487a1feb63daef65c5aee1a583) --- cddl/contrib/opensolaris/tools/ctf/common/memory.c | 14 ++++++++++++++ cddl/contrib/opensolaris/tools/ctf/common/memory.h | 1 + cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c | 7 ++++--- 3 files changed, 19 insertions(+), 3 deletions(-) diff --git a/cddl/contrib/opensolaris/tools/ctf/common/memory.c b/cddl/contrib/opensolaris/tools/ctf/common/memory.c index e16044a8b672..66296c5b114d 100644 --- a/cddl/contrib/opensolaris/tools/ctf/common/memory.c +++ b/cddl/contrib/opensolaris/tools/ctf/common/memory.c @@ -44,6 +44,20 @@ memory_bailout(void) exit(1); } +int +xasprintf(char **s, const char *fmt, ...) +{ + va_list ap; + int ret; + + va_start(ap, fmt); + ret = vasprintf(s, fmt, ap); + va_end(ap); + if (ret == -1) + memory_bailout(); + return (ret); +} + void * xmalloc(size_t size) { diff --git a/cddl/contrib/opensolaris/tools/ctf/common/memory.h b/cddl/contrib/opensolaris/tools/ctf/common/memory.h index 88ca31bec65a..72706b5f7fdb 100644 --- a/cddl/contrib/opensolaris/tools/ctf/common/memory.h +++ b/cddl/contrib/opensolaris/tools/ctf/common/memory.h @@ -39,6 +39,7 @@ extern "C" { #endif +int xasprintf(char **, const char *, ...); void *xmalloc(size_t); void *xcalloc(size_t); char *xstrdup(const char *); diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c b/cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c index 2d686e53fed1..9c422fb58fa1 100644 --- a/cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c +++ b/cddl/contrib/opensolaris/tools/ctf/cvt/dwarf.c @@ -618,7 +618,7 @@ tdesc_intr_long(dwarf_t *dw) * caller can then use the copy as the type for a bitfield structure member. */ static tdesc_t * -tdesc_intr_clone(dwarf_t *dw, tdesc_t *old, size_t bitsz) +tdesc_intr_clone(dwarf_t *dw, tdesc_t *old, size_t bitsz, const char *suffix) { tdesc_t *new = xcalloc(sizeof (tdesc_t)); @@ -627,7 +627,7 @@ tdesc_intr_clone(dwarf_t *dw, tdesc_t *old, size_t bitsz) "unresolved type\n", old->t_id); } - new->t_name = xstrdup(old->t_name); + asprintf(&new->t_name, "%s %s", old->t_name, suffix); new->t_size = old->t_size; new->t_id = mfgtid_next(dw); new->t_type = INTRINSIC; @@ -1158,7 +1158,8 @@ die_sou_resolve(tdesc_t *tdp, tdesc_t **tdpp __unused, void *private) debug(3, "tdp %u: creating bitfield for %d bits\n", tdp->t_id, ml->ml_size); - ml->ml_type = tdesc_intr_clone(dw, mt, ml->ml_size); + ml->ml_type = tdesc_intr_clone(dw, mt, ml->ml_size, + "bitfield"); } }