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perf tools: Convert to LIBUNWIND_SUPPORT

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For building perf without libunwind, we can set NO_LIBUNWIND=1 as a
argument of make.  It then defines NO_LIBUNWIND_SUPPORT macro for C code
to do the proper handling.  However it usually used in a negative
semantics - e.g. #ifndef - so we saw double negations which can be
misleading.  Convert it to a positive form to make it more readable.

Also change NO_PERF_REGS macro to HAVE_PERF_REGS for the same reason.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1348824728-14025-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2012-09-28 18:32:00 +09:00
committed by Arnaldo Carvalho de Melo
parent 29a0fc9b2b
commit 95485b1cda
4 changed files with 14 additions and 16 deletions
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14
tools/perf/builtin-record.c
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@@ -33,11 +33,11 @@
#define CALLCHAIN_HELP "do call-graph (stack chain/backtrace) recording: "
#ifdef NO_LIBUNWIND_SUPPORT
static char callchain_help[] = CALLCHAIN_HELP "[fp]";
#else
#ifdef LIBUNWIND_SUPPORT
static unsigned long default_stack_dump_size = 8192;
static char callchain_help[] = CALLCHAIN_HELP "[fp] dwarf";
#else
static char callchain_help[] = CALLCHAIN_HELP "[fp]";
#endif
enum write_mode_t {
@@ -800,7 +800,7 @@ error:
return ret;
}
#ifndef NO_LIBUNWIND_SUPPORT
#ifdef LIBUNWIND_SUPPORT
static int get_stack_size(char *str, unsigned long *_size)
{
char *endptr;
@@ -826,7 +826,7 @@ static int get_stack_size(char *str, unsigned long *_size)
max_size, str);
return -1;
}
#endif /* !NO_LIBUNWIND_SUPPORT */
#endif /* LIBUNWIND_SUPPORT */
static int
parse_callchain_opt(const struct option *opt __maybe_unused, const char *arg,
@@ -865,7 +865,7 @@ parse_callchain_opt(const struct option *opt __maybe_unused, const char *arg,
"needed for -g fp\n");
break;
#ifndef NO_LIBUNWIND_SUPPORT
#ifdef LIBUNWIND_SUPPORT
/* Dwarf style */
} else if (!strncmp(name, "dwarf", sizeof("dwarf"))) {
ret = 0;
@@ -883,7 +883,7 @@ parse_callchain_opt(const struct option *opt __maybe_unused, const char *arg,
if (!ret)
pr_debug("callchain: stack dump size %d\n",
rec->opts.stack_dump_size);
#endif /* !NO_LIBUNWIND_SUPPORT */
#endif /* LIBUNWIND_SUPPORT */
} else {
pr_err("callchain: Unknown -g option "
"value: %s\n", arg);