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Subject[PATCH 03/13] perf env: Adopt perf_header__set_cmdline
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

Move this from two globals to perf_env global, that eventually will
be just perf_header->env or something else, to ease the refactoring
series, leave it as a global and go on reading more of its fields,
not as part of the header writing process but as a perf_env init one
that will be used for perf.data-less situations.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-2j78tdf8zn1ci0y6ji15bifj@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/env.c | 39 ++++++++++++++++++++++++++++++++++++
tools/perf/util/env.h | 4 ++++
tools/perf/util/header.c | 44 +++++------------------------------------
tools/perf/util/parse-options.c | 2 +-
4 files changed, 49 insertions(+), 40 deletions(-)

diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index 0b3e1b2e5263..ca1e33a2203e 100644
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -1,6 +1,8 @@
#include "env.h"
#include "util.h"

+struct perf_env perf_env;
+
void perf_env__exit(struct perf_env *env)
{
zfree(&env->hostname);
@@ -17,3 +19,40 @@ void perf_env__exit(struct perf_env *env)
zfree(&env->pmu_mappings);
zfree(&env->cpu);
}
+
+int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
+{
+ int i;
+
+ /*
+ * If env->cmdline_argv has already been set, do not override it. This allows
+ * a command to set the cmdline, parse args and then call another
+ * builtin function that implements a command -- e.g, cmd_kvm calling
+ * cmd_record.
+ */
+ if (env->cmdline_argv != NULL)
+ return 0;
+
+ /* do not include NULL termination */
+ env->cmdline_argv = calloc(argc, sizeof(char *));
+ if (env->cmdline_argv == NULL)
+ goto out_enomem;
+
+ /*
+ * Must copy argv contents because it gets moved around during option
+ * parsing:
+ */
+ for (i = 0; i < argc ; i++) {
+ env->cmdline_argv[i] = argv[i];
+ if (env->cmdline_argv[i] == NULL)
+ goto out_free;
+ }
+
+ env->nr_cmdline = argc;
+
+ return 0;
+out_free:
+ zfree(&env->cmdline_argv);
+out_enomem:
+ return -ENOMEM;
+}
diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h
index b1370516d99a..70124d9a1624 100644
--- a/tools/perf/util/env.h
+++ b/tools/perf/util/env.h
@@ -32,6 +32,10 @@ struct perf_env {
struct cpu_topology_map *cpu;
};

+extern struct perf_env perf_env;
+
void perf_env__exit(struct perf_env *env);

+int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[]);
+
#endif /* __PERF_ENV_H */
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 8fd7b7de1acd..151b8310ac70 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -24,9 +24,6 @@
#include "build-id.h"
#include "data.h"

-static u32 header_argc;
-static const char **header_argv;
-
/*
* magic2 = "PERFILE2"
* must be a numerical value to let the endianness
@@ -138,37 +135,6 @@ static char *do_read_string(int fd, struct perf_header *ph)
return NULL;
}

-int
-perf_header__set_cmdline(int argc, const char **argv)
-{
- int i;
-
- /*
- * If header_argv has already been set, do not override it.
- * This allows a command to set the cmdline, parse args and
- * then call another builtin function that implements a
- * command -- e.g, cmd_kvm calling cmd_record.
- */
- if (header_argv)
- return 0;
-
- header_argc = (u32)argc;
-
- /* do not include NULL termination */
- header_argv = calloc(argc, sizeof(char *));
- if (!header_argv)
- return -ENOMEM;
-
- /*
- * must copy argv contents because it gets moved
- * around during option parsing
- */
- for (i = 0; i < argc ; i++)
- header_argv[i] = argv[i];
-
- return 0;
-}
-
static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
struct perf_evlist *evlist)
{
@@ -405,8 +371,8 @@ static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
{
char buf[MAXPATHLEN];
char proc[32];
- u32 i, n;
- int ret;
+ u32 n;
+ int i, ret;

/*
* actual atual path to perf binary
@@ -420,7 +386,7 @@ static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
buf[ret] = '\0';

/* account for binary path */
- n = header_argc + 1;
+ n = perf_env.nr_cmdline + 1;

ret = do_write(fd, &n, sizeof(n));
if (ret < 0)
@@ -430,8 +396,8 @@ static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
if (ret < 0)
return ret;

- for (i = 0 ; i < header_argc; i++) {
- ret = do_write_string(fd, header_argv[i]);
+ for (i = 0 ; i < perf_env.nr_cmdline; i++) {
+ ret = do_write_string(fd, perf_env.cmdline_argv[i]);
if (ret < 0)
return ret;
}
diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c
index 01626be2a8eb..9a38b05f0273 100644
--- a/tools/perf/util/parse-options.c
+++ b/tools/perf/util/parse-options.c
@@ -496,7 +496,7 @@ int parse_options_subcommand(int argc, const char **argv, const struct option *o
{
struct parse_opt_ctx_t ctx;

- perf_header__set_cmdline(argc, argv);
+ perf_env__set_cmdline(&perf_env, argc, argv);

/* build usage string if it's not provided */
if (subcommands && !usagestr[0]) {
--
2.1.0


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