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Date: Wed, 16 Dec 2015 21:57:41 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
Jiri Olsa <jolsa@...hat.com>,
Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH v4 7/9] perf: Finalize subcmd independence
Em Tue, Dec 15, 2015 at 09:39:38AM -0600, Josh Poimboeuf escreveu:
> For the files that will be moved to the subcmd library, remove all their
> perf-specific includes and duplicate any needed functionality.
Breaks rhel6.7 building:
> #include "run-command.h"
> #include "sigchain.h"
> #include "subcmd-config.h"
> diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c
> index c1da2a5..f424027 100644
> --- a/tools/perf/util/parse-options.c
> +++ b/tools/perf/util/parse-options.c
> @@ -1,33 +1,47 @@
> -#include "util.h"
> +#include <linux/compiler.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <stdint.h>
> +#include <string.h>
> +#include <ctype.h>
> #include "subcmd-util.h"
> #include "parse-options.h"
> -#include "cache.h"
> -#include "header.h"
> #include "subcmd-config.h"
> -#include <linux/string.h>
> +#include "pager.h"
>
> #define OPT_SHORT 1
> #define OPT_UNSET 2
>
> +typedef uint64_t u64;
> +
[acme@...dy linux]$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.7 (Santiago)
CC /tmp/build/perf/parse-options.o
parse-options.c:15: error: redefinition of typedef ‘u64’
/home/acme/git/linux/tools/include/linux/types.h:28: note: previous
declaration of ‘u64’ was here
mv: cannot stat `/tmp/build/perf/.parse-options.o.tmp': No such file or
directory
make[3]: *** [/tmp/build/perf/parse-options.o] Error 1
make[2]: *** [/tmp/build/perf/libsubcmd-in.o] Error 2
make[1]: *** [/tmp/build/perf/libsubcmd.a] Error 2
make[1]: *** Waiting for unfinished jobs....
MKDIR /tmp/build/perf/util/
> char *error_buf;
>
> static int opterror(const struct option *opt, const char *reason, int flags)
> {
> if (flags & OPT_SHORT)
> - return error("switch `%c' %s", opt->short_name, reason);
> - if (flags & OPT_UNSET)
> - return error("option `no-%s' %s", opt->long_name, reason);
> - return error("option `%s' %s", opt->long_name, reason);
> + fprintf(stderr, " Error: switch `%c' %s", opt->short_name, reason);
> + else if (flags & OPT_UNSET)
> + fprintf(stderr, " Error: option `no-%s' %s", opt->long_name, reason);
> + else
> + fprintf(stderr, " Error: option `%s' %s", opt->long_name, reason);
> +
> + return -1;
> +}
> +
> +static const char *skip_prefix(const char *str, const char *prefix)
> +{
> + size_t len = strlen(prefix);
> + return strncmp(str, prefix, len) ? NULL : str + len;
> }
>
> static void optwarning(const struct option *opt, const char *reason, int flags)
> {
> if (flags & OPT_SHORT)
> - warning("switch `%c' %s", opt->short_name, reason);
> + fprintf(stderr, " Warning: switch `%c' %s", opt->short_name, reason);
> else if (flags & OPT_UNSET)
> - warning("option `no-%s' %s", opt->long_name, reason);
> + fprintf(stderr, " Warning: option `no-%s' %s", opt->long_name, reason);
> else
> - warning("option `%s' %s", opt->long_name, reason);
> + fprintf(stderr, " Warning: option `%s' %s", opt->long_name, reason);
> }
>
> static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
> @@ -71,11 +85,11 @@ static int get_value(struct parse_opt_ctx_t *p,
>
> if (((flags & OPT_SHORT) && p->excl_opt->short_name) ||
> p->excl_opt->long_name == NULL) {
> - scnprintf(msg, sizeof(msg), "cannot be used with switch `%c'",
> - p->excl_opt->short_name);
> + snprintf(msg, sizeof(msg), "cannot be used with switch `%c'",
> + p->excl_opt->short_name);
> } else {
> - scnprintf(msg, sizeof(msg), "cannot be used with %s",
> - p->excl_opt->long_name);
> + snprintf(msg, sizeof(msg), "cannot be used with %s",
> + p->excl_opt->long_name);
> }
> opterror(opt, msg, flags);
> return -3;
> @@ -401,14 +415,16 @@ match:
> return get_value(p, options, flags);
> }
>
> - if (ambiguous_option)
> - return error("Ambiguous option: %s "
> - "(could be --%s%s or --%s%s)",
> - arg,
> - (ambiguous_flags & OPT_UNSET) ? "no-" : "",
> - ambiguous_option->long_name,
> - (abbrev_flags & OPT_UNSET) ? "no-" : "",
> - abbrev_option->long_name);
> + if (ambiguous_option) {
> + fprintf(stderr,
> + " Error: Ambiguous option: %s (could be --%s%s or --%s%s)",
> + arg,
> + (ambiguous_flags & OPT_UNSET) ? "no-" : "",
> + ambiguous_option->long_name,
> + (abbrev_flags & OPT_UNSET) ? "no-" : "",
> + abbrev_option->long_name);
> + return -1;
> + }
> if (abbrev_option)
> return get_value(p, abbrev_option, abbrev_flags);
> return -2;
> @@ -420,7 +436,7 @@ static void check_typos(const char *arg, const struct option *options)
> return;
>
> if (!prefixcmp(arg, "no-")) {
> - error ("did you mean `--%s` (with two dashes ?)", arg);
> + fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)", arg);
> exit(129);
> }
>
> @@ -428,7 +444,7 @@ static void check_typos(const char *arg, const struct option *options)
> if (!options->long_name)
> continue;
> if (!prefixcmp(options->long_name, arg)) {
> - error ("did you mean `--%s` (with two dashes ?)", arg);
> + fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)", arg);
> exit(129);
> }
> }
> @@ -746,16 +762,18 @@ static int option__cmp(const void *va, const void *vb)
>
> static struct option *options__order(const struct option *opts)
> {
> - int nr_opts = 0;
> + int nr_opts = 0, len;
> const struct option *o = opts;
> struct option *ordered;
>
> for (o = opts; o->type != OPTION_END; o++)
> ++nr_opts;
>
> - ordered = memdup(opts, sizeof(*o) * (nr_opts + 1));
> - if (ordered == NULL)
> + len = sizeof(*o) * (nr_opts + 1);
> + ordered = malloc(len);
> + if (!ordered)
> goto out;
> + memcpy(ordered, opts, len);
>
> qsort(ordered, nr_opts, sizeof(*o), option__cmp);
> out:
> diff --git a/tools/perf/util/parse-options.h b/tools/perf/util/parse-options.h
> index d1544069..dec893f 100644
> --- a/tools/perf/util/parse-options.h
> +++ b/tools/perf/util/parse-options.h
> @@ -1,8 +1,8 @@
> #ifndef __PERF_PARSE_OPTIONS_H
> #define __PERF_PARSE_OPTIONS_H
>
> -#include <linux/kernel.h>
> #include <stdbool.h>
> +#include <stdint.h>
>
> enum parse_opt_type {
> /* special types */
> diff --git a/tools/perf/util/run-command.c b/tools/perf/util/run-command.c
> index 910c0f6..fed37d6 100644
> --- a/tools/perf/util/run-command.c
> +++ b/tools/perf/util/run-command.c
> @@ -1,7 +1,15 @@
> -#include "cache.h"
> +#include <unistd.h>
> +#include <sys/types.h>
> +#include <sys/stat.h>
> +#include <fcntl.h>
> +#include <string.h>
> +#include <errno.h>
> +#include <sys/wait.h>
> +#include "subcmd-util.h"
> #include "run-command.h"
> #include "exec_cmd.h"
> -#include "debug.h"
> +
> +#define STRERR_BUFSIZE 128
>
> static inline void close_pair(int fd[2])
> {
> @@ -164,8 +172,8 @@ static int wait_or_whine(pid_t pid)
> if (waiting < 0) {
> if (errno == EINTR)
> continue;
> - error("waitpid failed (%s)",
> - strerror_r(errno, sbuf, sizeof(sbuf)));
> + fprintf(stderr, " Error: waitpid failed (%s)",
> + strerror_r(errno, sbuf, sizeof(sbuf)));
> return -ERR_RUN_COMMAND_WAITPID;
> }
> if (waiting != pid)
> diff --git a/tools/perf/util/run-command.h b/tools/perf/util/run-command.h
> index cf7d655..4a55393 100644
> --- a/tools/perf/util/run-command.h
> +++ b/tools/perf/util/run-command.h
> @@ -1,6 +1,8 @@
> #ifndef __PERF_RUN_COMMAND_H
> #define __PERF_RUN_COMMAND_H
>
> +#include <unistd.h>
> +
> enum {
> ERR_RUN_COMMAND_FORK = 10000,
> ERR_RUN_COMMAND_EXEC,
> diff --git a/tools/perf/util/sigchain.c b/tools/perf/util/sigchain.c
> index ba785e9..3537c34 100644
> --- a/tools/perf/util/sigchain.c
> +++ b/tools/perf/util/sigchain.c
> @@ -1,5 +1,6 @@
> +#include <signal.h>
> +#include "subcmd-util.h"
> #include "sigchain.h"
> -#include "cache.h"
>
> #define SIGCHAIN_MAX_SIGNALS 32
>
> diff --git a/tools/perf/util/subcmd-util.h b/tools/perf/util/subcmd-util.h
> index 98fb9f9..321aeb1 100644
> --- a/tools/perf/util/subcmd-util.h
> +++ b/tools/perf/util/subcmd-util.h
> @@ -1,8 +1,66 @@
> #ifndef __PERF_SUBCMD_UTIL_H
> #define __PERF_SUBCMD_UTIL_H
>
> +#include <stdarg.h>
> +#include <stdlib.h>
> #include <stdio.h>
>
> +#define NORETURN __attribute__((__noreturn__))
> +
> +static inline void report(const char *prefix, const char *err, va_list params)
> +{
> + char msg[1024];
> + vsnprintf(msg, sizeof(msg), err, params);
> + fprintf(stderr, " %s%s\n", prefix, msg);
> +}
> +
> +static NORETURN inline void die(const char *err, ...)
> +{
> + va_list params;
> +
> + va_start(params, err);
> + report(" Fatal: ", err, params);
> + exit(128);
> + va_end(params);
> +}
> +
> +#define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
> +
> +#define alloc_nr(x) (((x)+16)*3/2)
> +
> +/*
> + * Realloc the buffer pointed at by variable 'x' so that it can hold
> + * at least 'nr' entries; the number of entries currently allocated
> + * is 'alloc', using the standard growing factor alloc_nr() macro.
> + *
> + * DO NOT USE any expression with side-effect for 'x' or 'alloc'.
> + */
> +#define ALLOC_GROW(x, nr, alloc) \
> + do { \
> + if ((nr) > alloc) { \
> + if (alloc_nr(alloc) < (nr)) \
> + alloc = (nr); \
> + else \
> + alloc = alloc_nr(alloc); \
> + x = xrealloc((x), alloc * sizeof(*(x))); \
> + } \
> + } while(0)
> +
> +static inline void *xrealloc(void *ptr, size_t size)
> +{
> + void *ret = realloc(ptr, size);
> + if (!ret && !size)
> + ret = realloc(ptr, 1);
> + if (!ret) {
> + ret = realloc(ptr, size);
> + if (!ret && !size)
> + ret = realloc(ptr, 1);
> + if (!ret)
> + die("Out of memory, realloc failed");
> + }
> + return ret;
> +}
> +
> #define astrcatf(out, fmt, ...) \
> ({ \
> char *tmp = *(out); \
> @@ -21,4 +79,13 @@ static inline void astrcat(char **out, const char *add)
> free(tmp);
> }
>
> +static inline int prefixcmp(const char *str, const char *prefix)
> +{
> + for (; ; str++, prefix++)
> + if (!*prefix)
> + return 0;
> + else if (*str != *prefix)
> + return (unsigned char)*prefix - (unsigned char)*str;
> +}
> +
> #endif /* __PERF_SUBCMD_UTIL_H */
> diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
> index 150858f..4b519c5 100644
> --- a/tools/perf/util/util.h
> +++ b/tools/perf/util/util.h
> @@ -151,12 +151,6 @@ extern void set_warning_routine(void (*routine)(const char *err, va_list params)
> extern int prefixcmp(const char *str, const char *prefix);
> extern void set_buildid_dir(const char *dir);
>
> -static inline const char *skip_prefix(const char *str, const char *prefix)
> -{
> - size_t len = strlen(prefix);
> - return strncmp(str, prefix, len) ? NULL : str + len;
> -}
> -
> #ifdef __GLIBC_PREREQ
> #if __GLIBC_PREREQ(2, 1)
> #define HAVE_STRCHRNUL
> @@ -187,14 +181,6 @@ static inline void *zalloc(size_t size)
>
> #define zfree(ptr) ({ free(*ptr); *ptr = NULL; })
>
> -static inline int has_extension(const char *filename, const char *ext)
> -{
> - size_t len = strlen(filename);
> - size_t extlen = strlen(ext);
> -
> - return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
> -}
> -
> /* Sane ctype - no locale, and works with signed chars */
> #undef isascii
> #undef isspace
> --
> 2.4.3
--
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