linux-kernel - [tip:perf/urgent] perf symbols: Make sym-> end be the first address after the symbol range

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <tip-agomujr7tuqaq6lu7kr6z7h6@git.kernel.org>
Date:	Wed, 15 Oct 2014 03:06:24 -0700
From:	tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	mingo@...nel.org, namhyung@...nel.org, acme@...hat.com,
	tglx@...utronix.de, dsahern@...il.com, hpa@...or.com,
	peterz@...radead.org, linux-kernel@...r.kernel.org,
	adrian.hunter@...el.com, cebbert.lkml@...il.com, jolsa@...hat.com,
	eranian@...gle.com
Subject: [tip:perf/urgent] perf symbols: Make sym->
 end be the first address after the symbol range

Commit-ID:  2c241bd35e6f626ad6f867dcf9fefdc2315f125f
Gitweb:     http://git.kernel.org/tip/2c241bd35e6f626ad6f867dcf9fefdc2315f125f
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Tue, 14 Oct 2014 17:19:44 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 14 Oct 2014 17:50:58 -0300

perf symbols: Make sym->end be the first address after the symbol range

To follow vm_area_struct->vm_end convention.

By adhering to the convention that ->end is the first address outside
the symbol's range we can do things like:

	sym->end = start + len;
	len = sym->end - sym->start;

This is also now the convention used for struct map->end, fixing some
off-by-one bugs.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Chuck Ebbert <cebbert.lkml@...il.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-agomujr7tuqaq6lu7kr6z7h6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/annotate.c | 8 ++++----
 tools/perf/util/symbol.c   | 6 +++---
 tools/perf/util/symbol.h   | 2 +-
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 3643752..7dabde1 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -478,7 +478,7 @@ static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
 
 	pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
 
-	if (addr < sym->start || addr > sym->end)
+	if (addr < sym->start || addr >= sym->end)
 		return -ERANGE;
 
 	offset = addr - sym->start;
@@ -836,7 +836,7 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
 		    end = map__rip_2objdump(map, sym->end);
 
 		offset = line_ip - start;
-		if ((u64)line_ip < start || (u64)line_ip > end)
+		if ((u64)line_ip < start || (u64)line_ip >= end)
 			offset = -1;
 		else
 			parsed_line = tmp2 + 1;
@@ -966,7 +966,7 @@ fallback:
 		kce.kcore_filename = symfs_filename;
 		kce.addr = map__rip_2objdump(map, sym->start);
 		kce.offs = sym->start;
-		kce.len = sym->end + 1 - sym->start;
+		kce.len = sym->end - sym->start;
 		if (!kcore_extract__create(&kce)) {
 			delete_extract = true;
 			strlcpy(symfs_filename, kce.extract_filename,
@@ -987,7 +987,7 @@ fallback:
 		 disassembler_style ? "-M " : "",
 		 disassembler_style ? disassembler_style : "",
 		 map__rip_2objdump(map, sym->start),
-		 map__rip_2objdump(map, sym->end+1),
+		 map__rip_2objdump(map, sym->end),
 		 symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
 		 symbol_conf.annotate_src ? "-S" : "",
 		 symfs_filename, filename);
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index c787a43..0783311 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -186,7 +186,7 @@ void symbols__fixup_end(struct rb_root *symbols)
 		curr = rb_entry(nd, struct symbol, rb_node);
 
 		if (prev->end == prev->start && prev->end != curr->start)
-			prev->end = curr->start - 1;
+			prev->end = curr->start;
 	}
 
 	/* Last entry */
@@ -229,7 +229,7 @@ struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name)
 		sym = ((void *)sym) + symbol_conf.priv_size;
 
 	sym->start   = start;
-	sym->end     = len ? start + len - 1 : start;
+	sym->end     = len ? start + len : start;
 	sym->binding = binding;
 	sym->namelen = namelen - 1;
 
@@ -325,7 +325,7 @@ static struct symbol *symbols__find(struct rb_root *symbols, u64 ip)
 
 		if (ip < s->start)
 			n = n->rb_left;
-		else if (ip > s->end)
+		else if (ip >= s->end)
 			n = n->rb_right;
 		else
 			return s;
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index bec4b7b..eb2c19b 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -95,7 +95,7 @@ void symbols__delete(struct rb_root *symbols);
 
 static inline size_t symbol__size(const struct symbol *sym)
 {
-	return sym->end - sym->start + 1;
+	return sym->end - sym->start;
 }
 
 struct strlist;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/