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Message-ID: <tip-3hu56rvyh4q5gxogovb6ko8a@git.kernel.org>
Date: Thu, 24 Mar 2016 00:44:48 -0700
From: tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: adrian.hunter@...el.com, mingo@...nel.org, hpa@...or.com,
wangnan0@...wei.com, jolsa@...nel.org, namhyung@...nel.org,
acme@...hat.com, linux-kernel@...r.kernel.org, tglx@...utronix.de
Subject: [tip:perf/urgent] perf llvm: Use realpath to canonicalize paths
Commit-ID: 78478269d2c9be315164d15c14e6e222a06d2f40
Gitweb: http://git.kernel.org/tip/78478269d2c9be315164d15c14e6e222a06d2f40
Author: Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Wed, 23 Mar 2016 17:34:29 -0300
Committer: Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 23 Mar 2016 17:39:19 -0300
perf llvm: Use realpath to canonicalize paths
To kill the last user of make_nonrelative_path(), that gets ditched,
one more panicking function killed.
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/n/tip-3hu56rvyh4q5gxogovb6ko8a@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/util/Build | 1 -
tools/perf/util/abspath.c | 37 -------------------------------------
tools/perf/util/cache.h | 1 -
tools/perf/util/llvm-utils.c | 17 ++++++++++++-----
4 files changed, 12 insertions(+), 44 deletions(-)
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index eea25e2..da48fd8 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -1,4 +1,3 @@
-libperf-y += abspath.o
libperf-y += alias.o
libperf-y += annotate.o
libperf-y += build-id.o
diff --git a/tools/perf/util/abspath.c b/tools/perf/util/abspath.c
deleted file mode 100644
index 0e76aff..0000000
--- a/tools/perf/util/abspath.c
+++ /dev/null
@@ -1,37 +0,0 @@
-#include "cache.h"
-
-static const char *get_pwd_cwd(void)
-{
- static char cwd[PATH_MAX + 1];
- char *pwd;
- struct stat cwd_stat, pwd_stat;
- if (getcwd(cwd, PATH_MAX) == NULL)
- return NULL;
- pwd = getenv("PWD");
- if (pwd && strcmp(pwd, cwd)) {
- stat(cwd, &cwd_stat);
- if (!stat(pwd, &pwd_stat) &&
- pwd_stat.st_dev == cwd_stat.st_dev &&
- pwd_stat.st_ino == cwd_stat.st_ino) {
- strlcpy(cwd, pwd, PATH_MAX);
- }
- }
- return cwd;
-}
-
-const char *make_nonrelative_path(const char *path)
-{
- static char buf[PATH_MAX + 1];
-
- if (is_absolute_path(path)) {
- if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
- die("Too long path: %.*s", 60, path);
- } else {
- const char *cwd = get_pwd_cwd();
- if (!cwd)
- die("Cannot determine the current working directory");
- if (snprintf(buf, PATH_MAX, "%s/%s", cwd, path) >= PATH_MAX)
- die("Too long path: %.*s", 60, path);
- }
- return buf;
-}
diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index da322be..1f5a93c 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -64,7 +64,6 @@ static inline int is_absolute_path(const char *path)
return path[0] == '/';
}
-const char *make_nonrelative_path(const char *path);
char *strip_path_suffix(const char *path, const char *suffix);
char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c
index 00724d4..aab855f 100644
--- a/tools/perf/util/llvm-utils.c
+++ b/tools/perf/util/llvm-utils.c
@@ -3,11 +3,11 @@
* Copyright (C) 2015, Huawei Inc.
*/
+#include <limits.h>
#include <stdio.h>
-#include "util.h"
+#include <stdlib.h>
#include "debug.h"
#include "llvm-utils.h"
-#include "cache.h"
#define CLANG_BPF_CMD_DEFAULT_TEMPLATE \
"$CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS "\
@@ -334,10 +334,18 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
unsigned int kernel_version;
char linux_version_code_str[64];
const char *clang_opt = llvm_param.clang_opt;
- char clang_path[PATH_MAX], nr_cpus_avail_str[64];
+ char clang_path[PATH_MAX], abspath[PATH_MAX], nr_cpus_avail_str[64];
+ char serr[STRERR_BUFSIZE];
char *kbuild_dir = NULL, *kbuild_include_opts = NULL;
const char *template = llvm_param.clang_bpf_cmd_template;
+ if (path[0] != '-' && realpath(path, abspath) == NULL) {
+ err = errno;
+ pr_err("ERROR: problems with path %s: %s\n",
+ path, strerror_r(err, serr, sizeof(serr)));
+ return -err;
+ }
+
if (!template)
template = CLANG_BPF_CMD_DEFAULT_TEMPLATE;
@@ -387,8 +395,7 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
* stdin to be source file (testing).
*/
force_set_env("CLANG_SOURCE",
- (path[0] == '-') ? path :
- make_nonrelative_path(path));
+ (path[0] == '-') ? path : abspath);
pr_debug("llvm compiling command template: %s\n", template);
err = read_from_pipe(template, &obj_buf, &obj_buf_sz);
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