From 393be2e3747ea3ef0d2e724115a5f42b2fa50dbd Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Mon, 6 Aug 2012 13:41:21 +0900 Subject: perf symbols: Support minimal build without libelf Now we have isolated all ELF-specific stuff, it's possible to build without libelf. The output binary can do most of jobs but lacks (user level) symbol information - kernel symbols are still accessable thanks to the kallsyms. To build perf without libelf (elfutils), give NO_LIBELF=1 to make. For now, only 'perf probe' command is removed since it depends on libelf/libdw heavily. Signed-off-by: Namhyung Kim Cc: Ingo Molnar Cc: Jiri Olsa Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1344228082-15569-4-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/generate-cmdlist.sh | 15 ++++++++++++++ tools/perf/util/map.c | 3 ++- tools/perf/util/symbol-minimal.c | 39 +++++++++++++++++++++++++++++++++++++ 3 files changed, 56 insertions(+), 1 deletion(-) create mode 100644 tools/perf/util/symbol-minimal.c (limited to 'tools/perf/util') diff --git a/tools/perf/util/generate-cmdlist.sh b/tools/perf/util/generate-cmdlist.sh index f06f6fd148f8..389590c1ad21 100755 --- a/tools/perf/util/generate-cmdlist.sh +++ b/tools/perf/util/generate-cmdlist.sh @@ -21,4 +21,19 @@ do p }' "Documentation/perf-$cmd.txt" done + +echo "#ifndef NO_LIBELF_SUPPORT" +sed -n -e 's/^perf-\([^ ]*\)[ ].* full.*/\1/p' command-list.txt | +sort | +while read cmd +do + sed -n ' + /^NAME/,/perf-'"$cmd"'/H + ${ + x + s/.*perf-'"$cmd"' - \(.*\)/ {"'"$cmd"'", "\1"},/ + p + }' "Documentation/perf-$cmd.txt" +done +echo "#endif /* NO_LIBELF_SUPPORT */" echo "};" diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index 115654c469c6..287cb3452b4b 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -156,6 +156,7 @@ int map__load(struct map *self, symbol_filter_t filter) pr_warning(", continuing without symbols\n"); return -1; } else if (nr == 0) { +#ifndef NO_LIBELF_SUPPORT const size_t len = strlen(name); const size_t real_len = len - sizeof(DSO__DELETED); @@ -168,7 +169,7 @@ int map__load(struct map *self, symbol_filter_t filter) pr_warning("no symbols found in %s, maybe install " "a debug package?\n", name); } - +#endif return -1; } /* diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-minimal.c new file mode 100644 index 000000000000..416ecf3bccf5 --- /dev/null +++ b/tools/perf/util/symbol-minimal.c @@ -0,0 +1,39 @@ +#include "symbol.h" + + +int filename__read_build_id(const char *filename __used, void *bf __used, + size_t size __used) +{ + return -1; +} + +int sysfs__read_build_id(const char *filename __used, void *build_id __used, + size_t size __used) +{ + return -1; +} + +int filename__read_debuglink(const char *filename __used, + char *debuglink __used, size_t size __used) +{ + return -1; +} + +int dso__synthesize_plt_symbols(struct dso *dso __used, char *name __used, + struct map *map __used, + symbol_filter_t filter __used) +{ + return 0; +} + +int dso__load_sym(struct dso *dso __used, struct map *map __used, + const char *name __used, int fd __used, + symbol_filter_t filter __used, int kmodule __used, + int want_symtab __used) +{ + return 0; +} + +void symbol__elf_init(void) +{ +} -- cgit v1.2.3