perf tools: Factorize the map helpers

Factorize the dso mapping helpers into a single purpose common file
"util/map.c"

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Brice Goglin <Brice.Goglin@inria.fr>

tools/perf/Makefile

@@ -340,6 +340,7 @@ LIB_OBJS += util/header.o
 LIB_OBJS += util/callchain.o
 LIB_OBJS += util/values.o
 LIB_OBJS += util/debug.o
+LIB_OBJS += util/map.o
 
 BUILTIN_OBJS += builtin-annotate.o
 BUILTIN_OBJS += builtin-help.o

tools/perf/builtin-annotate.c

@@ -51,83 +51,6 @@ struct sym_ext {
 	char		*path;
 };
 
-struct map {
-	struct list_head node;
-	u64	 start;
-	u64	 end;
-	u64	 pgoff;
-	u64	 (*map_ip)(struct map *, u64);
-	struct dso	 *dso;
-};
-
-static u64 map__map_ip(struct map *map, u64 ip)
-{
-	return ip - map->start + map->pgoff;
-}
-
-static u64 vdso__map_ip(struct map *map __used, u64 ip)
-{
-	return ip;
-}
-
-static struct map *map__new(struct mmap_event *event)
-{
-	struct map *self = malloc(sizeof(*self));
-
-	if (self != NULL) {
-		const char *filename = event->filename;
-
-		self->start = event->start;
-		self->end   = event->start + event->len;
-		self->pgoff = event->pgoff;
-
-		self->dso = dsos__findnew(filename);
-		if (self->dso == NULL)
-			goto out_delete;
-
-		if (self->dso == vdso)
-			self->map_ip = vdso__map_ip;
-		else
-			self->map_ip = map__map_ip;
-	}
-	return self;
-out_delete:
-	free(self);
-	return NULL;
-}
-
-static struct map *map__clone(struct map *self)
-{
-	struct map *map = malloc(sizeof(*self));
-
-	if (!map)
-		return NULL;
-
-	memcpy(map, self, sizeof(*self));
-
-	return map;
-}
-
-static int map__overlap(struct map *l, struct map *r)
-{
-	if (l->start > r->start) {
-		struct map *t = l;
-		l = r;
-		r = t;
-	}
-
-	if (l->end > r->start)
-		return 1;
-
-	return 0;
-}
-
-static size_t map__fprintf(struct map *self, FILE *fp)
-{
-	return fprintf(fp, " %Lx-%Lx %Lx %s\n",
-		       self->start, self->end, self->pgoff, self->dso->name);
-}
-
 
 struct thread {
 	struct rb_node	 rb_node;
@@ -797,7 +720,7 @@ static int
 process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
 {
 	struct thread *thread = threads__findnew(event->mmap.pid);
-	struct map *map = map__new(&event->mmap);
+	struct map *map = map__new(&event->mmap, NULL, 0);
 
 	dprintf("%p [%p]: PERF_EVENT_MMAP %d: [%p(%p) @ %p]: %s\n",
 		(void *)(offset + head),

tools/perf/builtin-record.c

@@ -15,6 +15,7 @@
 #include "util/string.h"
 
 #include "util/header.h"
+#include "util/event.h"
 
 #include <unistd.h>
 #include <sched.h>

tools/perf/builtin-report.c

@@ -67,6 +67,10 @@ static char		callchain_default_opt[] = "fractal,0.5";
 
 static int		callchain;
 
+static char		__cwd[PATH_MAX];
+static char		*cwd = __cwd;
+static int		cwdlen;
+
 static
 struct callchain_param	callchain_param = {
 	.mode	= CHAIN_GRAPH_REL,
@@ -102,124 +106,6 @@ static int repsep_fprintf(FILE *fp, const char *fmt, ...)
 	return n;
 }
 
-
-
-static char __cwd[PATH_MAX];
-static char *cwd = __cwd;
-static int cwdlen;
-
-static int strcommon(const char *pathname)
-{
-	int n = 0;
-
-	while (n < cwdlen && pathname[n] == cwd[n])
-		++n;
-
-	return n;
-}
-
-struct map {
-	struct list_head node;
-	u64	 start;
-	u64	 end;
-	u64	 pgoff;
-	u64	 (*map_ip)(struct map *, u64);
-	struct dso	 *dso;
-};
-
-static u64 map__map_ip(struct map *map, u64 ip)
-{
-	return ip - map->start + map->pgoff;
-}
-
-static u64 vdso__map_ip(struct map *map __used, u64 ip)
-{
-	return ip;
-}
-
-static inline int is_anon_memory(const char *filename)
-{
-	return strcmp(filename, "//anon") == 0;
-}
-
-static struct map *map__new(struct mmap_event *event)
-{
-	struct map *self = malloc(sizeof(*self));
-
-	if (self != NULL) {
-		const char *filename = event->filename;
-		char newfilename[PATH_MAX];
-		int anon;
-
-		if (cwd) {
-			int n = strcommon(filename);
-
-			if (n == cwdlen) {
-				snprintf(newfilename, sizeof(newfilename),
-					 ".%s", filename + n);
-				filename = newfilename;
-			}
-		}
-
-		anon = is_anon_memory(filename);
-
-		if (anon) {
-			snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", event->pid);
-			filename = newfilename;
-		}
-
-		self->start = event->start;
-		self->end   = event->start + event->len;
-		self->pgoff = event->pgoff;
-
-		self->dso = dsos__findnew(filename);
-		if (self->dso == NULL)
-			goto out_delete;
-
-		if (self->dso == vdso || anon)
-			self->map_ip = vdso__map_ip;
-		else
-			self->map_ip = map__map_ip;
-	}
-	return self;
-out_delete:
-	free(self);
-	return NULL;
-}
-
-static struct map *map__clone(struct map *self)
-{
-	struct map *map = malloc(sizeof(*self));
-
-	if (!map)
-		return NULL;
-
-	memcpy(map, self, sizeof(*self));
-
-	return map;
-}
-
-static int map__overlap(struct map *l, struct map *r)
-{
-	if (l->start > r->start) {
-		struct map *t = l;
-		l = r;
-		r = t;
-	}
-
-	if (l->end > r->start)
-		return 1;
-
-	return 0;
-}
-
-static size_t map__fprintf(struct map *self, FILE *fp)
-{
-	return fprintf(fp, " %Lx-%Lx %Lx %s\n",
-		       self->start, self->end, self->pgoff, self->dso->name);
-}
-
-
 struct thread {
 	struct rb_node	 rb_node;
 	struct list_head maps;
@@ -1474,7 +1360,7 @@ static int
 process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
 {
 	struct thread *thread = threads__findnew(event->mmap.pid);
-	struct map *map = map__new(&event->mmap);
+	struct map *map = map__new(&event->mmap, cwd, cwdlen);
 
 	dprintf("%p [%p]: PERF_EVENT_MMAP %d: [%p(%p) @ %p]: %s\n",
 		(void *)(offset + head),

tools/perf/util/callchain.h

@@ -4,6 +4,7 @@
 #include "../perf.h"
 #include <linux/list.h>
 #include <linux/rbtree.h>
+#include "util.h"
 #include "symbol.h"
 
 enum chain_mode {

tools/perf/util/event.h

@@ -1,4 +1,8 @@
+#ifndef __PERF_EVENT_H
+#define __PERF_EVENT_H
 #include "../perf.h"
+#include "util.h"
+#include <linux/list.h>
 
 struct ip_event {
 	struct perf_event_header header;
@@ -52,3 +56,29 @@ typedef union event_union {
 	struct lost_event		lost;
 	struct read_event		read;
 } event_t;
+
+struct map {
+	struct list_head	node;
+	u64			start;
+	u64			end;
+	u64			pgoff;
+	u64			(*map_ip)(struct map *, u64);
+	struct dso		*dso;
+};
+
+static inline u64 map__map_ip(struct map *map, u64 ip)
+{
+	return ip - map->start + map->pgoff;
+}
+
+static inline u64 vdso__map_ip(struct map *map __used, u64 ip)
+{
+	return ip;
+}
+
+struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen);
+struct map *map__clone(struct map *self);
+int map__overlap(struct map *l, struct map *r);
+size_t map__fprintf(struct map *self, FILE *fp);
+
+#endif

tools/perf/util/map.c

@@ -0,0 +1,97 @@
+#include "event.h"
+#include "symbol.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+static inline int is_anon_memory(const char *filename)
+{
+	return strcmp(filename, "//anon") == 0;
+}
+
+static int strcommon(const char *pathname, char *cwd, int cwdlen)
+{
+	int n = 0;
+
+	while (n < cwdlen && pathname[n] == cwd[n])
+		++n;
+
+	return n;
+}
+
+ struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen)
+{
+	struct map *self = malloc(sizeof(*self));
+
+	if (self != NULL) {
+		const char *filename = event->filename;
+		char newfilename[PATH_MAX];
+		int anon;
+
+		if (cwd) {
+			int n = strcommon(filename, cwd, cwdlen);
+
+			if (n == cwdlen) {
+				snprintf(newfilename, sizeof(newfilename),
+					 ".%s", filename + n);
+				filename = newfilename;
+			}
+		}
+
+		anon = is_anon_memory(filename);
+
+		if (anon) {
+			snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", event->pid);
+			filename = newfilename;
+		}
+
+		self->start = event->start;
+		self->end   = event->start + event->len;
+		self->pgoff = event->pgoff;
+
+		self->dso = dsos__findnew(filename);
+		if (self->dso == NULL)
+			goto out_delete;
+
+		if (self->dso == vdso || anon)
+			self->map_ip = vdso__map_ip;
+		else
+			self->map_ip = map__map_ip;
+	}
+	return self;
+out_delete:
+	free(self);
+	return NULL;
+}
+
+struct map *map__clone(struct map *self)
+{
+	struct map *map = malloc(sizeof(*self));
+
+	if (!map)
+		return NULL;
+
+	memcpy(map, self, sizeof(*self));
+
+	return map;
+}
+
+int map__overlap(struct map *l, struct map *r)
+{
+	if (l->start > r->start) {
+		struct map *t = l;
+		l = r;
+		r = t;
+	}
+
+	if (l->end > r->start)
+		return 1;
+
+	return 0;
+}
+
+size_t map__fprintf(struct map *self, FILE *fp)
+{
+	return fprintf(fp, " %Lx-%Lx %Lx %s\n",
+		       self->start, self->end, self->pgoff, self->dso->name);
+}