Handle xlat styles when printing rlimit
shankarapailoor
shankarapailoor at gmail.com
Sun Feb 17 17:12:24 UTC 2019
Hi Dmitry,
Thanks for the comments! I've attached a v2 patch.
Regards,
Shankara
On Fri, Feb 8, 2019 at 5:29 PM Dmitry V. Levin <ldv at altlinux.org> wrote:
> Hi,
>
> On Fri, Jan 11, 2019 at 07:12:11PM -0800, shankarapailoor wrote:
> > Hi,
> >
> > strace doesn't honor xlat_styles when printing rlimit fields. Attached
> > is a patch which corrects this.
> >
> > Regards,
> > Shankara Pailoor
>
> > From 89ef3e2a7634c16d78ca539cda8242e9f72f01c4 Mon Sep 17 00:00:00 2001
> > From: Shankara Pailoor <shankarapailoor at gmail.com>
> > Date: Fri, 11 Jan 2019 19:07:33 -0800
> > Subject: [PATCH v1] handle xlat_styles when printing rlim_cur, rlim_max
> >
> > * resource.c (sprint_rlimit{32, 64}, print_rlimfield{32,64},
> > print_rlimit{32, 64}): handle xlat styles.
> > * tests/setrlimit.c: Add XLAT_{ABBREV, RAW, VERBOSE} macros.
> > * tests/xgetrlimit.c (sprint_rlim): Likewise.
> > * tests/setrlimit-Xabbrev.c: Add new test for rlimit xlat_style.
> > * tests/setrlimit-Xraw.c: Likewise.
> > * tests/setrlimit-Xverbose.c: Likewise.
> > * tests/pure_executables.list: Add setrlimit-X{abbrev, raw,
> > verbose} tests.
> > * tests/gen_tests.in: Likewise.
> > ---
> > resource.c | 49 ++++++++++++++++++++++++++++++++-----
> > tests/.gitignore | 3 +++
> > tests/gen_tests.in | 3 +++
> > tests/pure_executables.list | 3 +++
> > tests/setrlimit.c | 22 +++++++++++++++++
> > tests/xgetrlimit.c | 39 +++++++++++++++++++++++++----
> > 6 files changed, 108 insertions(+), 11 deletions(-)
> >
> > diff --git a/resource.c b/resource.c
> > index 724223ef..3572555b 100644
> > --- a/resource.c
> > +++ b/resource.c
> > @@ -20,17 +20,31 @@ static const char *
> > sprint_rlim64(uint64_t lim)
> > {
> > static char buf[sizeof(uint64_t)*3 + sizeof("*1024")];
> > + if ((lim != UINT64_MAX && lim % 1024 > 0) || (lim <= 1024))
> > + return NULL;
>
> Instead of replicating the check, ...
> >
> > if (lim == UINT64_MAX)
> > return "RLIM64_INFINITY";
> >
> > if (lim > 1024 && lim % 1024 == 0)
> > xsprintf(buf, "%" PRIu64 "*1024", lim / 1024);
> > - else
> > - xsprintf(buf, "%" PRIu64, lim);
>
> ... you could just return NULL here.
>
> Alternatively, you could inverse the check, e.g.
>
> if (lim <= 1024 || lim % 1024)
> return NULL;
> xsprintf(buf, "%" PRIu64 "*1024", lim / 1024);
>
> > return buf;
> > }
> >
> > +static void
> > +print_rlimfield64(uint64_t rlim_field) {
> > + const char *str = sprint_rlim64(rlim_field);
> > +
> > + if (!str || xlat_verbose(xlat_verbosity) != XLAT_STYLE_ABBREV)
> > + tprintf("%" PRIu64, rlim_field);
> > +
> > + if (!str || xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW)
> > + return;
> > +
> > + (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE
> > + ? tprints_comment : tprints)(str);
> > +}
> > +
> > static void
> > print_rlimit64(struct tcb *const tcp, const kernel_ulong_t addr)
> > {
> > @@ -40,8 +54,11 @@ print_rlimit64(struct tcb *const tcp, const
> kernel_ulong_t addr)
> > } rlim;
> >
> > if (!umove_or_printaddr(tcp, addr, &rlim)) {
> > - tprintf("{rlim_cur=%s,", sprint_rlim64(rlim.rlim_cur));
> > - tprintf(" rlim_max=%s}", sprint_rlim64(rlim.rlim_max));
> > + tprints("{rlim_cur=");
> > + print_rlimfield64(rlim.rlim_cur);
> > + tprints(", rlim_max=");
> > + print_rlimfield64(rlim.rlim_max);
> > + tprints("}");
> > }
> > }
> >
> > @@ -52,6 +69,9 @@ sprint_rlim32(uint32_t lim)
> > {
> > static char buf[sizeof(uint32_t)*3 + sizeof("*1024")];
> >
> > + if ((lim != UINT32_MAX && lim % 1024 > 0) || (lim <= 1024))
> > + return NULL;
>
> Likewise, there is no need to replicate the check.
>
> > if (lim == UINT32_MAX)
> > return "RLIM_INFINITY";
> >
> > @@ -62,6 +82,20 @@ sprint_rlim32(uint32_t lim)
> > return buf;
> > }
> >
> > +static void
> > +print_rlimfield32(uint32_t rlim_field) {
> > + const char *str = sprint_rlim32(rlim_field);
> > +
> > + if (!str || xlat_verbose(xlat_verbosity) != XLAT_STYLE_ABBREV)
> > + tprintf("%" PRIu32, rlim_field);
> > +
> > + if (!str || xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW)
> > + return;
> > +
> > + (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE
> > + ? tprints_comment : tprints)(str);
> > +}
> > +
> > static void
> > print_rlimit32(struct tcb *const tcp, const kernel_ulong_t addr)
> > {
> > @@ -71,8 +105,11 @@ print_rlimit32(struct tcb *const tcp, const
> kernel_ulong_t addr)
> > } rlim;
> >
> > if (!umove_or_printaddr(tcp, addr, &rlim)) {
> > - tprintf("{rlim_cur=%s,", sprint_rlim32(rlim.rlim_cur));
> > - tprintf(" rlim_max=%s}", sprint_rlim32(rlim.rlim_max));
> > + tprints("{rlim_cur=");
> > + print_rlimfield32(rlim.rlim_cur);
> > + tprints(", rlim_max=");
> > + print_rlimfield32(rlim.rlim_max);
> > + tprints("}");
> > }
> > }
> >
> > diff --git a/tests/.gitignore b/tests/.gitignore
> > index 24b17017..327a75cf 100644
> > --- a/tests/.gitignore
> > +++ b/tests/.gitignore
> > @@ -501,6 +501,9 @@ setresuid32
> > setreuid
> > setreuid32
> > setrlimit
> > +setrlimit-Xabbrev
> > +setrlimit-Xraw
> > +setrlimit-Xverbose
> > setuid
> > setuid32
> > shmxt
> > diff --git a/tests/gen_tests.in b/tests/gen_tests.in
> > index e2e70a12..1c11d2da 100644
> > --- a/tests/gen_tests.in
> > +++ b/tests/gen_tests.in
> > @@ -414,6 +414,9 @@ setresuid32 -a21
> > setreuid -a15
> > setreuid32 -a17
> > setrlimit -a27
> > +setrlimit-Xabbrev -a1 -e trace=setrlimit -Xabbrev
> > +setrlimit-Xraw -a1 -e trace=setrlimit -Xraw
> > +setrlimit-Xverbose -a1 -e trace=setrlimit -Xverbose
> > setuid -a10
> > setuid32 -a12
> > shmxt -a11 -e trace='/(osf_)?shmat,shmdt'
> > diff --git a/tests/pure_executables.list b/tests/pure_executables.list
> > index 23aabb9e..616ee9ed 100755
> > --- a/tests/pure_executables.list
> > +++ b/tests/pure_executables.list
> > @@ -420,6 +420,9 @@ setresuid32
> > setreuid
> > setreuid32
> > setrlimit
> > +setrlimit-Xabbrev
> > +setrlimit-Xraw
> > +setrlimit-Xverbose
> > setuid
> > setuid32
> > shmxt
> > diff --git a/tests/setrlimit.c b/tests/setrlimit.c
> > index f199abe1..084e7beb 100644
> > --- a/tests/setrlimit.c
> > +++ b/tests/setrlimit.c
> > @@ -23,7 +23,14 @@ main(void)
> > for (xlat = resources; xlat->str; ++xlat) {
> > unsigned long res = 0xfacefeed00000000ULL | xlat->val;
> > long rc = syscall(__NR_setrlimit, res, 0);
> > +#if XLAT_RAW
> > + printf("setrlimit(%#lx, NULL) = %s\n", xlat->val,
> sprintrc(rc));
> > +#elif XLAT_VERBOSE
> > + printf("setrlimit(%#lx /* %s */, NULL) = %s\n", xlat->val,
> > + xlat->str, sprintrc(rc));
> > +#else
> > printf("setrlimit(%s, NULL) = %s\n", xlat->str,
> sprintrc(rc));
> > +#endif
> >
> > struct rlimit libc_rlim = {};
> > if (getrlimit((int) res, &libc_rlim))
> > @@ -33,10 +40,25 @@ main(void)
> >
> > rc = syscall(__NR_setrlimit, res, rlimit);
> > const char *errstr = sprintrc(rc);
> > +#if XLAT_RAW
> > + printf("setrlimit(%#lx, {rlim_cur=%s, rlim_max=%s}) =
> %s\n",
> > + xlat->val,
> > + sprint_rlim(rlimit[0]), sprint_rlim(rlimit[1]),
> > + errstr);
> > +#elif XLAT_VERBOSE
> > + printf("setrlimit(%#lx /* %s */,"
> > + " {rlim_cur=%s, rlim_max=%s}) = %s\n",
> > + xlat->val,
> > + xlat->str,
> > + sprint_rlim(rlimit[0]), sprint_rlim(rlimit[1]),
> > + errstr);
> > +#else
> > printf("setrlimit(%s, {rlim_cur=%s, rlim_max=%s}) = %s\n",
> > xlat->str,
> > sprint_rlim(rlimit[0]), sprint_rlim(rlimit[1]),
> > errstr);
> > +#endif
> > +
> > }
> >
> > puts("+++ exited with 0 +++");
> > diff --git a/tests/xgetrlimit.c b/tests/xgetrlimit.c
> > index b807f290..3efd4baf 100644
> > --- a/tests/xgetrlimit.c
> > +++ b/tests/xgetrlimit.c
> > @@ -18,24 +18,53 @@
> >
> > const char *
> > sprint_rlim(kernel_ulong_t lim)
> > -{
> > +{
> > + static char buf[2][1024+sizeof(lim)*3 + sizeof("*1024")];
>
> Why 1024?
>
>
> --
> ldv
> --
> Strace-devel mailing list
> Strace-devel at lists.strace.io
> https://lists.strace.io/mailman/listinfo/strace-devel
>
--
Regards,
Shankara Pailoor
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