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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@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-3hu56rvyh4q5gxogovb6ko8a@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2016-03-23 17:34:29 -03:00
parent 0741208a7c
commit 78478269d2
4 changed files with 12 additions and 44 deletions
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1
tools/perf/util/Build
View File

@ -1,4 +1,3 @@
libperf-y += abspath.o
libperf-y += alias.o
libperf-y += annotate.o
libperf-y += build-id.o

37
tools/perf/util/abspath.c
View File

@ -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;
}

1
tools/perf/util/cache.h
View File

@ -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)));

17
tools/perf/util/llvm-utils.c
View File

@ -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);