perf map: Add accessors for ->pgoff and ->reloc

Later changes will add reference count checking for 'struct map'. Add
accessors so that the reference count check is only necessary in one
place.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miaoqian Lin <linmq006@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Shunsuke Nakamura <nakamura.shun@fujitsu.com>
Cc: Song Liu <song@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Yury Norov <yury.norov@gmail.com>
Link: https://lore.kernel.org/r/20230404205954.2245628-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/arch/x86/util/event.c

@@ -61,7 +61,7 @@ int perf_event__synthesize_extra_kmaps(struct perf_tool *tool,
 
 		event->mmap.start = map__start(map);
 		event->mmap.len   = map__size(map);
-		event->mmap.pgoff = map->pgoff;
+		event->mmap.pgoff = map__pgoff(map);
 		event->mmap.pid   = machine->pid;
 
 		strlcpy(event->mmap.filename, kmap->name, PATH_MAX);

tools/perf/builtin-report.c

@@ -857,7 +857,7 @@ static size_t maps__fprintf_task(struct maps *maps, int indent, FILE *fp)
 				   prot & PROT_WRITE ? 'w' : '-',
 				   prot & PROT_EXEC ? 'x' : '-',
 				   map__flags(map) ? 's' : 'p',
-				   map->pgoff,
+				   map__pgoff(map),
 				   dso->id.ino, dso->name);
 	}
 

tools/perf/tests/vmlinux-kallsyms.c

@@ -335,10 +335,10 @@ next_pair:
 			}
 
 			pr_info("WARN: %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s in kallsyms as",
-				map__start(map), map__end(map), map->pgoff, dso->name);
+				map__start(map), map__end(map), map__pgoff(map), dso->name);
 			if (mem_end != map__end(pair))
 				pr_info(":\nWARN: *%" PRIx64 "-%" PRIx64 " %" PRIx64,
-					map__start(pair), map__end(pair), pair->pgoff);
+					map__start(pair), map__end(pair), map__pgoff(pair));
 			pr_info(" %s\n", dso->name);
 			pair->priv = 1;
 		}

tools/perf/util/machine.c

@@ -1277,9 +1277,9 @@ int machine__map_x86_64_entry_trampolines(struct machine *machine,
 		if (!kmap || !is_entry_trampoline(kmap->name))
 			continue;
 
-		dest_map = maps__find(kmaps, map->pgoff);
+		dest_map = maps__find(kmaps, map__pgoff(map));
 		if (dest_map != map)
-			map->pgoff = map__map_ip(dest_map, map->pgoff);
+			map->pgoff = map__map_ip(dest_map, map__pgoff(map));
 		found = true;
 	}
 	if (found || machine->trampolines_mapped)

tools/perf/util/map.c

@@ -421,7 +421,7 @@ size_t map__fprintf(struct map *map, FILE *fp)
 	const struct dso *dso = map__dso(map);
 
 	return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",
-		       map__start(map), map__end(map), map->pgoff, dso->name);
+		       map__start(map), map__end(map), map__pgoff(map), dso->name);
 }
 
 size_t map__fprintf_dsoname(struct map *map, FILE *fp)
@@ -510,7 +510,7 @@ u64 map__rip_2objdump(struct map *map, u64 rip)
 		return rip;
 
 	if (dso->rel)
-		return rip - map->pgoff;
+		return rip - map__pgoff(map);
 
 	/*
 	 * kernel modules also have DSO_TYPE_USER in dso->kernel,
@@ -519,7 +519,7 @@ u64 map__rip_2objdump(struct map *map, u64 rip)
 	if (dso->kernel == DSO_SPACE__USER)
 		return rip + dso->text_offset;
 
-	return map__unmap_ip(map, rip) - map->reloc;
+	return map__unmap_ip(map, rip) - map__reloc(map);
 }
 
 /**
@@ -542,7 +542,7 @@ u64 map__objdump_2mem(struct map *map, u64 ip)
 		return map__unmap_ip(map, ip);
 
 	if (dso->rel)
-		return map__unmap_ip(map, ip + map->pgoff);
+		return map__unmap_ip(map, ip + map__pgoff(map));
 
 	/*
 	 * kernel modules also have DSO_TYPE_USER in dso->kernel,
@@ -551,7 +551,7 @@ u64 map__objdump_2mem(struct map *map, u64 ip)
 	if (dso->kernel == DSO_SPACE__USER)
 		return map__unmap_ip(map, ip - dso->text_offset);
 
-	return ip + map->reloc;
+	return ip + map__reloc(map);
 }
 
 bool map__contains_symbol(const struct map *map, const struct symbol *sym)
@@ -592,12 +592,12 @@ struct maps *map__kmaps(struct map *map)
 
 u64 map__dso_map_ip(const struct map *map, u64 ip)
 {
-	return ip - map__start(map) + map->pgoff;
+	return ip - map__start(map) + map__pgoff(map);
 }
 
 u64 map__dso_unmap_ip(const struct map *map, u64 ip)
 {
-	return ip + map__start(map) - map->pgoff;
+	return ip + map__start(map) - map__pgoff(map);
 }
 
 u64 identity__map_ip(const struct map *map __maybe_unused, u64 ip)

tools/perf/util/map.h

@@ -72,6 +72,16 @@ static inline u64 map__end(const struct map *map)
 	return map->end;
 }
 
+static inline u64 map__pgoff(const struct map *map)
+{
+	return map->pgoff;
+}
+
+static inline u64 map__reloc(const struct map *map)
+{
+	return map->reloc;
+}
+
 static inline u32 map__flags(const struct map *map)
 {
 	return map->flags;

tools/perf/util/probe-event.c

@@ -135,14 +135,14 @@ static int kernel_get_symbol_address_by_name(const char *name, u64 *addr,
 	/* ref_reloc_sym is just a label. Need a special fix*/
 	reloc_sym = kernel_get_ref_reloc_sym(&map);
 	if (reloc_sym && strcmp(name, reloc_sym->name) == 0)
-		*addr = (!map->reloc || reloc) ? reloc_sym->addr :
+		*addr = (!map__reloc(map) || reloc) ? reloc_sym->addr :
 			reloc_sym->unrelocated_addr;
 	else {
 		sym = machine__find_kernel_symbol_by_name(host_machine, name, &map);
 		if (!sym)
 			return -ENOENT;
 		*addr = map__unmap_ip(map, sym->start) -
-			((reloc) ? 0 : map->reloc) -
+			((reloc) ? 0 : map__reloc(map)) -
 			((reladdr) ? map__start(map) : 0);
 	}
 	return 0;
@@ -400,7 +400,7 @@ static int find_alternative_probe_point(struct debuginfo *dinfo,
 					   "Consider identifying the final function used at run time and set the probe directly on that.\n",
 					   pp->function);
 		} else
-			address = map__unmap_ip(map, sym->start) - map->reloc;
+			address = map__unmap_ip(map, sym->start) - map__reloc(map);
 		break;
 	}
 	if (!address) {
@@ -866,7 +866,7 @@ post_process_kernel_probe_trace_events(struct probe_trace_event *tevs,
 			free(tevs[i].point.symbol);
 		tevs[i].point.symbol = tmp;
 		tevs[i].point.offset = tevs[i].point.address -
-			(map->reloc ? reloc_sym->unrelocated_addr :
+			(map__reloc(map) ? reloc_sym->unrelocated_addr :
 				      reloc_sym->addr);
 	}
 	return skipped;

tools/perf/util/symbol.c

@@ -810,11 +810,11 @@ static int maps__split_kallsyms_for_kcore(struct maps *kmaps, struct dso *dso)
 			continue;
 		}
 		curr_map_dso = map__dso(curr_map);
-		pos->start -= map__start(curr_map) - curr_map->pgoff;
+		pos->start -= map__start(curr_map) - map__pgoff(curr_map);
 		if (pos->end > map__end(curr_map))
 			pos->end = map__end(curr_map);
 		if (pos->end)
-			pos->end -= map__start(curr_map) - curr_map->pgoff;
+			pos->end -= map__start(curr_map) - map__pgoff(curr_map);
 		symbols__insert(&curr_map_dso->symbols, pos);
 		++count;
 	}
@@ -1459,7 +1459,7 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
 		if (new_map == replacement_map) {
 			map->start	= map__start(new_map);
 			map->end	= map__end(new_map);
-			map->pgoff	= new_map->pgoff;
+			map->pgoff	= map__pgoff(new_map);
 			map->map_ip	= new_map->map_ip;
 			map->unmap_ip	= new_map->unmap_ip;
 			/* Ensure maps are correctly ordered */

tools/perf/util/unwind-libdw.c

@@ -62,19 +62,19 @@ static int __report_module(struct addr_location *al, u64 ip,
 		Dwarf_Addr s;
 
 		dwfl_module_info(mod, NULL, &s, NULL, NULL, NULL, NULL, NULL);
-		if (s != map__start(al->map) - al->map->pgoff)
+		if (s != map__start(al->map) - map__pgoff(al->map))
 			mod = 0;
 	}
 
 	if (!mod)
 		mod = dwfl_report_elf(ui->dwfl, dso->short_name, dso->long_name, -1,
-				      map__start(al->map) - al->map->pgoff, false);
+				      map__start(al->map) - map__pgoff(al->map), false);
 	if (!mod) {
 		char filename[PATH_MAX];
 
 		if (dso__build_id_filename(dso, filename, sizeof(filename), false))
 			mod = dwfl_report_elf(ui->dwfl, dso->short_name, filename, -1,
-					      map__start(al->map) - al->map->pgoff, false);
+					      map__start(al->map) - map__pgoff(al->map), false);
 	}
 
 	if (mod) {