Commit-ID: 011532379b7c2de6757e129037bdfc8d704bce23 Gitweb: https://git.kernel.org/tip/011532379b7c2de6757e129037bdfc8d704bce23 Author: Florian Fainelli <f.faine...@gmail.com> AuthorDate: Thu, 20 Dec 2018 19:43:36 -0800 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Tue, 8 Jan 2019 13:28:13 -0300
perf tools: Make find_vdso_map() more modular In preparation for checking that the vectors page on the ARM architecture, refactor the find_vdso_map() function to accept finding an arbitrary string and create a dedicated helper function for that under util/find-map.c and update the filename to find-map.c and all references to it: perf-read-vdso.c and util/vdso.c. Signed-off-by: Florian Fainelli <f.faine...@gmail.com> Acked-by: Jiri Olsa <jo...@kernel.org> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Chris Healy <cphe...@gmail.com> Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org> Cc: Kim Phillips <kim.phill...@arm.com> Cc: Lucas Stach <l.st...@pengutronix.de> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Ravi Bangoria <ravi.bango...@linux.ibm.com> Cc: Russell King <rmk+ker...@armlinux.org.uk> Cc: Thomas Gleixner <t...@linutronix.de> Cc: Thomas Richter <tmri...@linux.ibm.com> Link: http://lkml.kernel.org/r/20181221034337.26663-2-f.faine...@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/Makefile.perf | 4 ++-- tools/perf/perf-read-vdso.c | 6 +++--- tools/perf/util/{find-vdso-map.c => find-map.c} | 7 +++---- tools/perf/util/vdso.c | 6 +++--- 4 files changed, 11 insertions(+), 12 deletions(-) diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index 2921f829a0f4..0ee6795d82cc 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -662,12 +662,12 @@ $(OUTPUT)perf-%: %.o $(PERFLIBS) $(QUIET_LINK)$(CC) $(CFLAGS) -o $@ $(LDFLAGS) $(filter %.o,$^) $(LIBS) ifndef NO_PERF_READ_VDSO32 -$(OUTPUT)perf-read-vdso32: perf-read-vdso.c util/find-vdso-map.c +$(OUTPUT)perf-read-vdso32: perf-read-vdso.c util/find-map.c $(QUIET_CC)$(CC) -m32 $(filter -static,$(LDFLAGS)) -Wall -Werror -o $@ perf-read-vdso.c endif ifndef NO_PERF_READ_VDSOX32 -$(OUTPUT)perf-read-vdsox32: perf-read-vdso.c util/find-vdso-map.c +$(OUTPUT)perf-read-vdsox32: perf-read-vdso.c util/find-map.c $(QUIET_CC)$(CC) -mx32 $(filter -static,$(LDFLAGS)) -Wall -Werror -o $@ perf-read-vdso.c endif diff --git a/tools/perf/perf-read-vdso.c b/tools/perf/perf-read-vdso.c index 8c0ca0cc428f..aaa5210ea84a 100644 --- a/tools/perf/perf-read-vdso.c +++ b/tools/perf/perf-read-vdso.c @@ -5,17 +5,17 @@ #define VDSO__MAP_NAME "[vdso]" /* - * Include definition of find_vdso_map() also used in util/vdso.c for + * Include definition of find_map() also used in util/vdso.c for * building perf. */ -#include "util/find-vdso-map.c" +#include "util/find-map.c" int main(void) { void *start, *end; size_t size, written; - if (find_vdso_map(&start, &end)) + if (find_map(&start, &end, VDSO__MAP_NAME)) return 1; size = end - start; diff --git a/tools/perf/util/find-vdso-map.c b/tools/perf/util/find-map.c similarity index 71% rename from tools/perf/util/find-vdso-map.c rename to tools/perf/util/find-map.c index d7823e3508fc..7b2300588ece 100644 --- a/tools/perf/util/find-vdso-map.c +++ b/tools/perf/util/find-map.c @@ -1,5 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 -static int find_vdso_map(void **start, void **end) +static int find_map(void **start, void **end, const char *name) { FILE *maps; char line[128]; @@ -7,7 +7,7 @@ static int find_vdso_map(void **start, void **end) maps = fopen("/proc/self/maps", "r"); if (!maps) { - fprintf(stderr, "vdso: cannot open maps\n"); + fprintf(stderr, "cannot open maps\n"); return -1; } @@ -21,8 +21,7 @@ static int find_vdso_map(void **start, void **end) if (m < 0) continue; - if (!strncmp(&line[m], VDSO__MAP_NAME, - sizeof(VDSO__MAP_NAME) - 1)) + if (!strncmp(&line[m], name, strlen(name))) found = 1; } diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c index 741af209b19d..3702cba11d7d 100644 --- a/tools/perf/util/vdso.c +++ b/tools/perf/util/vdso.c @@ -18,10 +18,10 @@ #include "debug.h" /* - * Include definition of find_vdso_map() also used in perf-read-vdso.c for + * Include definition of find_map() also used in perf-read-vdso.c for * building perf-read-vdso32 and perf-read-vdsox32. */ -#include "find-vdso-map.c" +#include "find-map.c" #define VDSO__TEMP_FILE_NAME "/tmp/perf-vdso.so-XXXXXX" @@ -76,7 +76,7 @@ static char *get_file(struct vdso_file *vdso_file) if (vdso_file->found) return vdso_file->temp_file_name; - if (vdso_file->error || find_vdso_map(&start, &end)) + if (vdso_file->error || find_map(&start, &end, VDSO__MAP_NAME)) return NULL; size = end - start;
