From 5c8d1cbbbed39dcab2ecf429d6e56ea548c0fda4 Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Thu, 25 Feb 2010 08:36:04 -0500 Subject: perf probe: Show more lines after last line Show 2 more lines after the last probe-able line. This will clearly show the last closed-brace of inline functions. Signed-off-by: Masami Hiramatsu Cc: systemtap Cc: DLE Cc: Frederic Weisbecker Cc: Arnaldo Carvalho de Melo Cc: Peter Zijlstra Cc: Paul Mackerras Cc: Mike Galbraith Cc: K.Prasad Cc: Frederic Weisbecker Cc: Ananth N Mavinakayanahalli LKML-Reference: <20100225133604.6725.76820.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar --- tools/perf/util/probe-event.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'tools/perf/util/probe-event.c') diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 71b0dd590a37..91f55f24fa9d 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -716,6 +716,7 @@ void del_trace_kprobe_events(struct strlist *dellist) } #define LINEBUF_SIZE 256 +#define NR_ADDITIONAL_LINES 2 static void show_one_line(FILE *fp, unsigned int l, bool skip, bool show_num) { @@ -776,5 +777,11 @@ void show_line_range(struct line_range *lr) show_one_line(fp, (l++) - lr->offset, false, false); show_one_line(fp, (l++) - lr->offset, false, true); } + + if (lr->end == INT_MAX) + lr->end = l + NR_ADDITIONAL_LINES; + while (l < lr->end && !feof(fp)) + show_one_line(fp, (l++) - lr->offset, false, false); + fclose(fp); } -- cgit v1.2.3 From 2a9c8c36092de41c13fdd81fe59556915b080c3e Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Thu, 25 Feb 2010 08:36:12 -0500 Subject: perf probe: Add lazy line matching support Add lazy line matching support for specifying new probes. This also changes the syntax of perf probe a bit. Now perf probe accepts one of below probe event definitions. 1) Define event based on function name [EVENT=]FUNC[@SRC][:RLN|+OFF|%return|;PTN] [ARG ...] 2) Define event based on source file with line number [EVENT=]SRC:ALN [ARG ...] 3) Define event based on source file with lazy pattern [EVENT=]SRC;PTN [ARG ...] - New lazy matching pattern(PTN) follows ';' (semicolon). And it must be put the end of the definition. - So, @SRC is no longer the part which must be put at the end of the definition. Note that ';' (semicolon) can be interpreted as the end of a command by the shell. This means that you need to quote it. (anyway you will need to quote the lazy pattern itself too, because it may contains other sensitive characters, like '[',']' etc.). Lazy matching ------------- The lazy line matching is similar to glob matching except ignoring spaces in both of pattern and target. e.g. 'a=*' can matches 'a=b', 'a = b', 'a == b' and so on. This provides some sort of flexibility and robustness to probe point definitions against minor code changes. (for example, actual 10th line of schedule() can be changed easily by modifying schedule(), but the same line matching 'rq=cpu_rq*' may still exist.) Changes in v3: - Cast Dwarf_Addr to uintmax_t for printf-formats. Changes in v2: - Cast Dwarf_Addr to unsigned long long for printf-formats. Signed-off-by: Masami Hiramatsu Cc: systemtap Cc: DLE Cc: Frederic Weisbecker Cc: Arnaldo Carvalho de Melo Cc: Peter Zijlstra Cc: Paul Mackerras Cc: Mike Galbraith Cc: K.Prasad Cc: Frederic Weisbecker Cc: Ananth N Mavinakayanahalli LKML-Reference: <20100225133611.6725.45078.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar --- tools/perf/util/probe-event.c | 48 +++++++++++++++++++++++++++---------------- 1 file changed, 30 insertions(+), 18 deletions(-) (limited to 'tools/perf/util/probe-event.c') diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 91f55f24fa9d..fa156f008e0b 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -119,14 +119,14 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) char c, nc = 0; /* * - * perf probe [EVENT=]SRC:LN - * perf probe [EVENT=]FUNC[+OFFS|%return][@SRC] + * perf probe [EVENT=]SRC[:LN|;PTN] + * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT] * * TODO:Group name support */ - ptr = strchr(arg, '='); - if (ptr) { /* Event name */ + ptr = strpbrk(arg, ";=@+%"); + if (ptr && *ptr == '=') { /* Event name */ *ptr = '\0'; tmp = ptr + 1; ptr = strchr(arg, ':'); @@ -139,7 +139,7 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) arg = tmp; } - ptr = strpbrk(arg, ":+@%"); + ptr = strpbrk(arg, ";:+@%"); if (ptr) { nc = *ptr; *ptr++ = '\0'; @@ -156,7 +156,11 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) while (ptr) { arg = ptr; c = nc; - ptr = strpbrk(arg, ":+@%"); + if (c == ';') { /* Lazy pattern must be the last part */ + pp->lazy_line = strdup(arg); + break; + } + ptr = strpbrk(arg, ";:+@%"); if (ptr) { nc = *ptr; *ptr++ = '\0'; @@ -165,13 +169,13 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) case ':': /* Line number */ pp->line = strtoul(arg, &tmp, 0); if (*tmp != '\0') - semantic_error("There is non-digit charactor" - " in line number."); + semantic_error("There is non-digit char" + " in line number."); break; case '+': /* Byte offset from a symbol */ pp->offset = strtoul(arg, &tmp, 0); if (*tmp != '\0') - semantic_error("There is non-digit charactor" + semantic_error("There is non-digit character" " in offset."); break; case '@': /* File name */ @@ -179,9 +183,6 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) semantic_error("SRC@SRC is not allowed."); pp->file = strdup(arg); DIE_IF(pp->file == NULL); - if (ptr) - semantic_error("@SRC must be the last " - "option."); break; case '%': /* Probe places */ if (strcmp(arg, "return") == 0) { @@ -196,11 +197,18 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) } /* Exclusion check */ + if (pp->lazy_line && pp->line) + semantic_error("Lazy pattern can't be used with line number."); + + if (pp->lazy_line && pp->offset) + semantic_error("Lazy pattern can't be used with offset."); + if (pp->line && pp->offset) semantic_error("Offset can't be used with line number."); - if (!pp->line && pp->file && !pp->function) - semantic_error("File always requires line number."); + if (!pp->line && !pp->lazy_line && pp->file && !pp->function) + semantic_error("File always requires line number or " + "lazy pattern."); if (pp->offset && !pp->function) semantic_error("Offset requires an entry function."); @@ -208,11 +216,13 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) if (pp->retprobe && !pp->function) semantic_error("Return probe requires an entry function."); - if ((pp->offset || pp->line) && pp->retprobe) - semantic_error("Offset/Line can't be used with return probe."); + if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe) + semantic_error("Offset/Line/Lazy pattern can't be used with " + "return probe."); - pr_debug("symbol:%s file:%s line:%d offset:%d, return:%d\n", - pp->function, pp->file, pp->line, pp->offset, pp->retprobe); + pr_debug("symbol:%s file:%s line:%d offset:%d return:%d lazy:%s\n", + pp->function, pp->file, pp->line, pp->offset, pp->retprobe, + pp->lazy_line); } /* Parse perf-probe event definition */ @@ -456,6 +466,8 @@ static void clear_probe_point(struct probe_point *pp) free(pp->function); if (pp->file) free(pp->file); + if (pp->lazy_line) + free(pp->lazy_line); for (i = 0; i < pp->nr_args; i++) free(pp->args[i]); if (pp->args) -- cgit v1.2.3