From f712a86c1406abf50b0dcff0500c723e2aca050a Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 3 Jan 2019 16:03:46 -0300 Subject: perf python: Make sure the python binding output directory is in place Instead of doing an unconditional mkdir, use a dummy Makefile variable to check if the directory is there and if not, create it. This is better than what we had and will help with other python bindings that are in development, like one involved with python backtraces. Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Link: https://lkml.kernel.org/n/tip-iis6us2nocw3y4uuoon9osd7@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile.perf | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'tools/perf/Makefile.perf') diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index ff29c3372ec3..2921f829a0f4 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -524,12 +524,14 @@ $(arch_errno_name_array): $(arch_errno_tbl) all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) $(OTHER_PROGRAMS) +# Create python binding output directory if not already present +_dummy := $(shell [ -d '$(OUTPUT)python' ] || mkdir -p '$(OUTPUT)python') + $(OUTPUT)python/perf.so: $(PYTHON_EXT_SRCS) $(PYTHON_EXT_DEPS) $(LIBTRACEEVENT_DYNAMIC_LIST) $(QUIET_GEN)LDSHARED="$(CC) -pthread -shared" \ CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS) $(LIBTRACEEVENT_DYNAMIC_LIST_LDFLAGS)' \ $(PYTHON_WORD) util/setup.py \ --quiet build_ext; \ - mkdir -p $(OUTPUT)python && \ cp $(PYTHON_EXTBUILD_LIB)perf*.so $(OUTPUT)python/ please_set_SHELL_PATH_to_a_more_modern_shell: -- cgit v1.2.3 From 011532379b7c2de6757e129037bdfc8d704bce23 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Thu, 20 Dec 2018 19:43:36 -0800 Subject: 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 Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Chris Healy Cc: Greg Kroah-Hartman Cc: Kim Phillips Cc: Lucas Stach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Russell King Cc: Thomas Gleixner Cc: Thomas Richter Link: http://lkml.kernel.org/r/20181221034337.26663-2-f.fainelli@gmail.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile.perf | 4 ++-- tools/perf/perf-read-vdso.c | 6 +++--- tools/perf/util/find-map.c | 30 ++++++++++++++++++++++++++++++ tools/perf/util/find-vdso-map.c | 31 ------------------------------- tools/perf/util/vdso.c | 6 +++--- 5 files changed, 38 insertions(+), 39 deletions(-) create mode 100644 tools/perf/util/find-map.c delete mode 100644 tools/perf/util/find-vdso-map.c (limited to 'tools/perf/Makefile.perf') 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-map.c b/tools/perf/util/find-map.c new file mode 100644 index 000000000000..7b2300588ece --- /dev/null +++ b/tools/perf/util/find-map.c @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0 +static int find_map(void **start, void **end, const char *name) +{ + FILE *maps; + char line[128]; + int found = 0; + + maps = fopen("/proc/self/maps", "r"); + if (!maps) { + fprintf(stderr, "cannot open maps\n"); + return -1; + } + + while (!found && fgets(line, sizeof(line), maps)) { + int m = -1; + + /* We care only about private r-x mappings. */ + if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n", + start, end, &m)) + continue; + if (m < 0) + continue; + + if (!strncmp(&line[m], name, strlen(name))) + found = 1; + } + + fclose(maps); + return !found; +} diff --git a/tools/perf/util/find-vdso-map.c b/tools/perf/util/find-vdso-map.c deleted file mode 100644 index d7823e3508fc..000000000000 --- a/tools/perf/util/find-vdso-map.c +++ /dev/null @@ -1,31 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -static int find_vdso_map(void **start, void **end) -{ - FILE *maps; - char line[128]; - int found = 0; - - maps = fopen("/proc/self/maps", "r"); - if (!maps) { - fprintf(stderr, "vdso: cannot open maps\n"); - return -1; - } - - while (!found && fgets(line, sizeof(line), maps)) { - int m = -1; - - /* We care only about private r-x mappings. */ - if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n", - start, end, &m)) - continue; - if (m < 0) - continue; - - if (!strncmp(&line[m], VDSO__MAP_NAME, - sizeof(VDSO__MAP_NAME) - 1)) - found = 1; - } - - fclose(maps); - return !found; -} 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; -- cgit v1.2.3