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author | Ingo Molnar <mingo@elte.hu> | 2010-04-27 11:16:54 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-04-27 11:16:54 +0200 |
commit | 462b04e28a7ec1339c892117c3f20a40e55d0e83 (patch) | |
tree | 5ea38f3227c761fa936b293afa52c26a660bd6c7 | |
parent | cfadf9d4ac4be940595ab73d3def24c23c8b875f (diff) | |
parent | f93830fbb06b67848c762f2177c06cc3cbb97deb (diff) | |
download | linux-462b04e28a7ec1339c892117c3f20a40e55d0e83.tar.gz linux-462b04e28a7ec1339c892117c3f20a40e55d0e83.tar.bz2 linux-462b04e28a7ec1339c892117c3f20a40e55d0e83.zip |
Merge branch 'perf' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/core
-rw-r--r-- | tools/perf/Documentation/perf-probe.txt | 3 | ||||
-rw-r--r-- | tools/perf/Makefile | 2 | ||||
-rw-r--r-- | tools/perf/builtin-probe.c | 9 | ||||
-rw-r--r-- | tools/perf/util/probe-event.c | 34 | ||||
-rw-r--r-- | tools/perf/util/probe-event.h | 4 | ||||
-rw-r--r-- | tools/perf/util/probe-finder.c | 15 | ||||
-rw-r--r-- | tools/perf/util/probe-finder.h | 6 | ||||
-rw-r--r-- | tools/perf/util/symbol.c | 1 |
8 files changed, 48 insertions, 26 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt index 63c25d304880..94a258c96a44 100644 --- a/tools/perf/Documentation/perf-probe.txt +++ b/tools/perf/Documentation/perf-probe.txt @@ -62,6 +62,9 @@ OPTIONS Dry run. With this option, --add and --del doesn't execute actual adding and removal operations. +--max-probes:: + Set the maximum number of probe points for an event. Default is 128. + PROBE SYNTAX ------------ Probe points are defined by following syntax. diff --git a/tools/perf/Makefile b/tools/perf/Makefile index e8bf2e1ab497..3ac6b677becd 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -504,7 +504,7 @@ PERFLIBS = $(LIB_FILE) ifndef NO_DWARF ifneq ($(shell sh -c "(echo '\#include <dwarf.h>'; echo '\#include <libdw.h>'; echo 'int main(void) { Dwarf *dbg; dbg = dwarf_begin(0, DWARF_C_READ); return (long)dbg; }') | $(CC) -x c - $(ALL_CFLAGS) -I/usr/include/elfutils -ldw -lelf -o $(BITBUCKET) $(ALL_LDFLAGS) $(EXTLIBS) "$(QUIET_STDERR)" && echo y"), y) - msg := $(warning No libdw.h found or old libdw.h found, disables dwarf support. Please install elfutils-devel/elfutils-dev); + msg := $(warning No libdw.h found or old libdw.h found, disables dwarf support. Please install elfutils-devel/libdw-dev); NO_DWARF := 1 endif # Dwarf support endif # NO_DWARF diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index c1e54035e8cf..61c6d70732c9 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -54,6 +54,7 @@ static struct { struct perf_probe_event events[MAX_PROBES]; struct strlist *dellist; struct line_range line_range; + int max_probe_points; } params; @@ -179,6 +180,8 @@ static const struct option options[] = { "file", "vmlinux pathname"), #endif OPT__DRY_RUN(&probe_event_dry_run), + OPT_INTEGER('\0', "max-probes", ¶ms.max_probe_points, + "Set how many probe points can be found for a probe."), OPT_END() }; @@ -200,6 +203,9 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) } } + if (params.max_probe_points == 0) + params.max_probe_points = MAX_PROBES; + if ((!params.nevents && !params.dellist && !params.list_events && !params.show_lines)) usage_with_options(probe_usage, options); @@ -246,7 +252,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) if (params.nevents) { ret = add_perf_probe_events(params.events, params.nevents, - params.force_add); + params.force_add, + params.max_probe_points); if (ret < 0) { pr_err(" Error: Failed to add events. (%d)\n", ret); return ret; diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 4fb480367c3e..9ded38ced234 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -150,7 +150,8 @@ static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, /* Try to find perf_probe_event with debuginfo */ static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, - struct kprobe_trace_event **tevs) + struct kprobe_trace_event **tevs, + int max_tevs) { bool need_dwarf = perf_probe_event_need_dwarf(pev); int fd, ntevs; @@ -166,7 +167,7 @@ static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, } /* Searching trace events corresponding to probe event */ - ntevs = find_kprobe_trace_events(fd, pev, tevs); + ntevs = find_kprobe_trace_events(fd, pev, tevs, max_tevs); close(fd); if (ntevs > 0) { /* Succeeded to find trace events */ @@ -180,15 +181,16 @@ static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, return -ENOENT; } /* Error path : ntevs < 0 */ - if (need_dwarf) { - if (ntevs == -EBADF) - pr_warning("No dwarf info found in the vmlinux - " - "please rebuild with CONFIG_DEBUG_INFO=y.\n"); - return ntevs; + pr_debug("An error occurred in debuginfo analysis (%d).\n", ntevs); + if (ntevs == -EBADF) { + pr_warning("Warning: No dwarf info found in the vmlinux - " + "please rebuild kernel with CONFIG_DEBUG_INFO=y.\n"); + if (!need_dwarf) { + pr_debug("Trying to use symbols.\nn"); + return 0; + } } - pr_debug("An error occurred in debuginfo analysis." - " Try to use symbols.\n"); - return 0; + return ntevs; } #define LINEBUF_SIZE 256 @@ -317,7 +319,8 @@ static int convert_to_perf_probe_point(struct kprobe_trace_point *tp, } static int try_to_find_kprobe_trace_events(struct perf_probe_event *pev, - struct kprobe_trace_event **tevs __unused) + struct kprobe_trace_event **tevs __unused, + int max_tevs __unused) { if (perf_probe_event_need_dwarf(pev)) { pr_warning("Debuginfo-analysis is not supported.\n"); @@ -1407,14 +1410,15 @@ static int __add_kprobe_trace_events(struct perf_probe_event *pev, } static int convert_to_kprobe_trace_events(struct perf_probe_event *pev, - struct kprobe_trace_event **tevs) + struct kprobe_trace_event **tevs, + int max_tevs) { struct symbol *sym; int ret = 0, i; struct kprobe_trace_event *tev; /* Convert perf_probe_event with debuginfo */ - ret = try_to_find_kprobe_trace_events(pev, tevs); + ret = try_to_find_kprobe_trace_events(pev, tevs, max_tevs); if (ret != 0) return ret; @@ -1486,7 +1490,7 @@ struct __event_package { }; int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, - bool force_add) + bool force_add, int max_tevs) { int i, j, ret; struct __event_package *pkgs; @@ -1505,7 +1509,7 @@ int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, pkgs[i].pev = &pevs[i]; /* Convert with or without debuginfo */ ret = convert_to_kprobe_trace_events(pkgs[i].pev, - &pkgs[i].tevs); + &pkgs[i].tevs, max_tevs); if (ret < 0) goto end; pkgs[i].ntevs = ret; diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h index e7ff0d02c0d4..e9db1a214ca4 100644 --- a/tools/perf/util/probe-event.h +++ b/tools/perf/util/probe-event.h @@ -115,8 +115,8 @@ extern void clear_kprobe_trace_event(struct kprobe_trace_event *tev); extern int parse_line_range_desc(const char *cmd, struct line_range *lr); -extern int add_perf_probe_events(struct perf_probe_event *pevs, int ntevs, - bool force_add); +extern int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, + bool force_add, int max_probe_points); extern int del_perf_probe_events(struct strlist *dellist); extern int show_perf_probe_events(void); extern int show_line_range(struct line_range *lr); diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index e7ee52fd0e09..562b1443e785 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -626,8 +626,9 @@ static int convert_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf) Dwarf_Attribute fb_attr; size_t nops; - if (pf->ntevs == MAX_PROBES) { - pr_warning("Too many( > %d) probe point found.\n", MAX_PROBES); + if (pf->ntevs == pf->max_tevs) { + pr_warning("Too many( > %d) probe point found.\n", + pf->max_tevs); return -ERANGE; } tev = &pf->tevs[pf->ntevs++]; @@ -871,6 +872,8 @@ static int probe_point_inline_cb(Dwarf_Die *in_die, void *data) (uintmax_t)pf->addr); param->retval = convert_probe_point(in_die, pf); + if (param->retval < 0) + return DWARF_CB_ABORT; } return DWARF_CB_OK; @@ -930,9 +933,9 @@ static int find_probe_point_by_func(struct probe_finder *pf) /* Find kprobe_trace_events specified by perf_probe_event from debuginfo */ int find_kprobe_trace_events(int fd, struct perf_probe_event *pev, - struct kprobe_trace_event **tevs) + struct kprobe_trace_event **tevs, int max_tevs) { - struct probe_finder pf = {.pev = pev}; + struct probe_finder pf = {.pev = pev, .max_tevs = max_tevs}; struct perf_probe_point *pp = &pev->point; Dwarf_Off off, noff; size_t cuhl; @@ -940,7 +943,7 @@ int find_kprobe_trace_events(int fd, struct perf_probe_event *pev, Dwarf *dbg; int ret = 0; - pf.tevs = zalloc(sizeof(struct kprobe_trace_event) * MAX_PROBES); + pf.tevs = zalloc(sizeof(struct kprobe_trace_event) * max_tevs); if (pf.tevs == NULL) return -ENOMEM; *tevs = pf.tevs; @@ -1106,6 +1109,8 @@ static int line_range_funcdecl_cb(Dwarf_Die *sp_die, void *data) return DWARF_CB_OK; param->retval = line_range_add_line(src, lineno, lf->lr); + if (param->retval < 0) + return DWARF_CB_ABORT; return DWARF_CB_OK; } diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h index 310ce897229c..66f1980e3855 100644 --- a/tools/perf/util/probe-finder.h +++ b/tools/perf/util/probe-finder.h @@ -18,7 +18,8 @@ static inline int is_c_varname(const char *name) #ifdef DWARF_SUPPORT /* Find kprobe_trace_events specified by perf_probe_event from debuginfo */ extern int find_kprobe_trace_events(int fd, struct perf_probe_event *pev, - struct kprobe_trace_event **tevs); + struct kprobe_trace_event **tevs, + int max_tevs); /* Find a perf_probe_point from debuginfo */ extern int find_perf_probe_point(int fd, unsigned long addr, @@ -32,7 +33,8 @@ extern int find_line_range(int fd, struct line_range *lr); struct probe_finder { struct perf_probe_event *pev; /* Target probe event */ struct kprobe_trace_event *tevs; /* Result trace events */ - int ntevs; /* number of trace events */ + int ntevs; /* Number of trace events */ + int max_tevs; /* Max number of trace events */ /* For function searching */ int lno; /* Line number */ diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index e782e7db16c5..e77c33a11de3 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -189,6 +189,7 @@ struct dso *dso__new(const char *name) self->sorted_by_name = 0; self->has_build_id = 0; self->kernel = DSO_TYPE_USER; + INIT_LIST_HEAD(&self->node); } return self; |