From 95485b1cda827e4db7102ad5fde1791087a0f4c5 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Fri, 28 Sep 2012 18:32:00 +0900 Subject: [PATCH] perf tools: Convert to LIBUNWIND_SUPPORT 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 Acked-by: Jiri Olsa Cc: Ingo Molnar Cc: Jiri Olsa Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1348824728-14025-5-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile | 8 +++----- tools/perf/builtin-record.c | 14 +++++++------- tools/perf/util/perf_regs.h | 4 ++-- tools/perf/util/unwind.h | 4 ++-- 4 files changed, 14 insertions(+), 16 deletions(-) diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 1df09175d8d4..676302441e14 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -535,9 +535,8 @@ endif # PERF_HAVE_DWARF_REGS endif # NO_DWARF endif # NO_LIBELF -ifdef NO_LIBUNWIND - BASIC_CFLAGS += -DNO_LIBUNWIND_SUPPORT -else +ifndef NO_LIBUNWIND + BASIC_CFLAGS += -DLIBUNWIND_SUPPORT EXTLIBS += $(LIBUNWIND_LIBS) BASIC_CFLAGS := $(LIBUNWIND_CFLAGS) $(BASIC_CFLAGS) BASIC_LDFLAGS := $(LIBUNWIND_LDFLAGS) $(BASIC_LDFLAGS) @@ -747,8 +746,7 @@ ifeq ($(NO_PERF_REGS),0) ifeq ($(ARCH),x86) LIB_H += arch/x86/include/perf_regs.h endif -else - BASIC_CFLAGS += -DNO_PERF_REGS + BASIC_CFLAGS += -DHAVE_PERF_REGS endif ifdef NO_STRLCPY diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index f14cb5fdb91f..8c029fe2e22c 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -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 @@ parse_branch_stack(const struct option *opt, const char *str, int unset) 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); diff --git a/tools/perf/util/perf_regs.h b/tools/perf/util/perf_regs.h index 316dbe7f86ed..5a4f2b6f3738 100644 --- a/tools/perf/util/perf_regs.h +++ b/tools/perf/util/perf_regs.h @@ -1,7 +1,7 @@ #ifndef __PERF_REGS_H #define __PERF_REGS_H -#ifndef NO_PERF_REGS +#ifdef HAVE_PERF_REGS #include #else #define PERF_REGS_MASK 0 @@ -10,5 +10,5 @@ static inline const char *perf_reg_name(int id __maybe_unused) { return NULL; } -#endif /* NO_PERF_REGS */ +#endif /* HAVE_PERF_REGS */ #endif /* __PERF_REGS_H */ diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h index a78c8b303bb5..cb6bc503a792 100644 --- a/tools/perf/util/unwind.h +++ b/tools/perf/util/unwind.h @@ -13,7 +13,7 @@ struct unwind_entry { typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg); -#ifndef NO_LIBUNWIND_SUPPORT +#ifdef LIBUNWIND_SUPPORT int unwind__get_entries(unwind_entry_cb_t cb, void *arg, struct machine *machine, struct thread *thread, @@ -31,5 +31,5 @@ unwind__get_entries(unwind_entry_cb_t cb __maybe_unused, { return 0; } -#endif /* NO_LIBUNWIND_SUPPORT */ +#endif /* LIBUNWIND_SUPPORT */ #endif /* __UNWIND_H */