diff options
| -rw-r--r-- | tools/perf/Makefile | 6 | ||||
| -rw-r--r-- | tools/perf/builtin-probe.c | 42 | ||||
| -rw-r--r-- | tools/perf/perf.c | 2 | ||||
| -rw-r--r-- | tools/perf/util/probe-finder.h | 2 |
4 files changed, 40 insertions, 12 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 6dabcf1a4df6..52b1f438e71a 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -385,6 +385,7 @@ BUILTIN_OBJS += builtin-stat.o BUILTIN_OBJS += builtin-timechart.o BUILTIN_OBJS += builtin-top.o BUILTIN_OBJS += builtin-trace.o +BUILTIN_OBJS += builtin-probe.o PERFLIBS = $(LIB_FILE) @@ -420,13 +421,12 @@ ifneq ($(shell sh -c "(echo '\#include <libelf.h>'; echo 'int main(void) { Elf * endif ifneq ($(shell sh -c "(echo '\#include <libdwarf/dwarf.h>'; echo '\#include <libdwarf/libdwarf.h>'; echo 'int main(void) { Dwarf_Debug dbg; Dwarf_Error err; dwarf_init(0, DW_DLC_READ, 0, 0, &dbg, &err); return (long)dbg; }') | $(CC) -x c - $(ALL_CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -ldwarf -lelf -o /dev/null $(ALL_LDFLAGS) > /dev/null 2>&1 && echo y"), y) - msg := $(warning No libdwarf.h found, disables probe subcommand. Please install libdwarf-dev/libdwarf-devel); + msg := $(warning No libdwarf.h found, disables dwarf support. Please install libdwarf-dev/libdwarf-devel); + BASIC_CFLAGS += -DNO_LIBDWARF else EXTLIBS += -lelf -ldwarf LIB_H += util/probe-finder.h LIB_OBJS += util/probe-finder.o - BUILTIN_OBJS += builtin-probe.o - BASIC_CFLAGS += -DSUPPORT_DWARF endif ifdef NO_DEMANGLE diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 24b64b5cefce..73c883b715cc 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -54,6 +54,7 @@ const char *default_search_path[NR_SEARCH_PATH] = { static struct { char *vmlinux; char *release; + int need_dwarf; int nr_probe; struct probe_point probes[MAX_PROBES]; char *events[MAX_PROBES]; @@ -162,6 +163,8 @@ static int parse_probepoint(const struct option *opt __used, pp->function, pp->file, pp->offset); } free(argv[1]); + if (pp->file) + session.need_dwarf = 1; /* Copy arguments */ pp->nr_args = argc - 2; @@ -173,15 +176,19 @@ static int parse_probepoint(const struct option *opt __used, } /* Ensure return probe has no C argument */ - if (retp) - for (i = 0; i < pp->nr_args; i++) - if (is_c_varname(pp->args[i])) + for (i = 0; i < pp->nr_args; i++) + if (is_c_varname(pp->args[i])) { + if (retp) semantic_error("You can't specify local" " variable for kretprobe"); + session.need_dwarf = 1; + } + debug("%d arguments\n", pp->nr_args); return 0; } +#ifndef NO_LIBDWARF static int open_default_vmlinux(void) { struct utsname uts; @@ -209,6 +216,7 @@ static int open_default_vmlinux(void) } return fd; } +#endif static const char * const probe_usage[] = { "perf probe [<options>] -P 'PROBEDEF' [-P 'PROBEDEF' ...]", @@ -216,10 +224,16 @@ static const char * const probe_usage[] = { }; static const struct option options[] = { +#ifndef NO_LIBDWARF OPT_STRING('k', "vmlinux", &session.vmlinux, "file", "vmlinux/module pathname"), +#endif OPT_CALLBACK('P', "probe", NULL, +#ifdef NO_LIBDWARF + "p|r:[GRP/]NAME FUNC[+OFFS] [ARG ...]", +#else "p|r:[GRP/]NAME FUNC[+OFFS][@SRC]|@SRC:LINE [ARG ...]", +#endif "probe point definition, where\n" "\t\tp:\tkprobe probe\n" "\t\tr:\tkretprobe probe\n" @@ -227,9 +241,13 @@ static const struct option options[] = { "\t\tNAME:\tEvent name\n" "\t\tFUNC:\tFunction name\n" "\t\tOFFS:\tOffset from function entry (in byte)\n" +#ifdef NO_LIBDWARF + "\t\tARG:\tProbe argument (only \n" +#else "\t\tSRC:\tSource code path\n" "\t\tLINE:\tLine number\n" "\t\tARG:\tProbe argument (local variable name or\n" +#endif "\t\t\tkprobe-tracer argument format is supported.)\n", parse_probepoint), OPT_END() @@ -279,7 +297,7 @@ error: int cmd_probe(int argc, const char **argv, const char *prefix __used) { - int i, j, fd, ret, need_dwarf = 0; + int i, j, fd, ret; struct probe_point *pp; char buf[MAX_CMDLEN]; @@ -288,12 +306,19 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) if (argc || session.nr_probe == 0) usage_with_options(probe_usage, options); - /* Synthesize return probes */ +#ifdef NO_LIBDWARF + if (session.need_dwarf) + semantic_error("Dwarf-analysis is not supported"); +#endif + + /* Synthesize probes without dwarf */ for (j = 0; j < session.nr_probe; j++) { +#ifndef NO_LIBDWARF if (session.events[j][0] != 'r') { - need_dwarf = 1; + session.need_dwarf = 1; continue; } +#endif ret = synthesize_probepoint(&session.probes[j]); if (ret == -E2BIG) semantic_error("probe point is too long."); @@ -303,7 +328,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) } } - if (!need_dwarf) +#ifndef NO_LIBDWARF + if (!session.need_dwarf) goto setup_probes; if (session.vmlinux) @@ -332,6 +358,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) close(fd); setup_probes: +#endif /* !NO_LIBDWARF */ + /* Settng up probe points */ snprintf(buf, MAX_CMDLEN, "%s/../kprobe_events", debugfs_path); fd = open(buf, O_WRONLY, O_APPEND); diff --git a/tools/perf/perf.c b/tools/perf/perf.c index f598120c0097..c570d177d5c6 100644 --- a/tools/perf/perf.c +++ b/tools/perf/perf.c @@ -295,9 +295,7 @@ static void handle_internal_command(int argc, const char **argv) { "version", cmd_version, 0 }, { "trace", cmd_trace, 0 }, { "sched", cmd_sched, 0 }, -#ifdef SUPPORT_DWARF { "probe", cmd_probe, 0 }, -#endif }; unsigned int i; static const char ext[] = STRIP_EXTENSION; diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h index af920de64866..306810c32f6b 100644 --- a/tools/perf/util/probe-finder.h +++ b/tools/perf/util/probe-finder.h @@ -44,6 +44,7 @@ struct probe_point { char *probes[MAX_PROBES]; /* Output buffers (will be allocated)*/ }; +#ifndef NO_LIBDWARF extern int find_probepoint(int fd, struct probe_point *pp); #include <libdwarf/dwarf.h> @@ -64,5 +65,6 @@ struct probe_finder { char *buf; /* Current output buffer */ int len; /* Length of output buffer */ }; +#endif /* NO_LIBDWARF */ #endif /*_PROBE_FINDER_H */ |