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perf annotate: Pass filename to objdump via execl 

The symbol__disassemble() function uses shell to launch objdump and
filter its output via grep. Passing filenames by interpolating them into
the command line via "%s" may lead to problems if said filenames contain
special characters.

Instead, pass the filename as a command line argument where it is not
subject to any kind of interpretation, then use quoted shell
interpolation to build the strings we need safely.

Signed-off-by: Ivan Krylov <krylov.r00t@gmail.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20181014111803.5d83b806@Tarkus
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ivan Krylov 2018-10-14 11:18:03 +03:00 committed by Arnaldo Carvalho de Melo
parent a3366db06b
commit 442b4eb3af
1 changed files with 4 additions and 4 deletions
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8
tools/perf/util/annotate.c
View File

@ -1723,15 +1723,14 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
err = asprintf(&command,
"%s %s%s --start-address=0x%016" PRIx64
" --stop-address=0x%016" PRIx64
" -l -d %s %s -C \"%s\" 2>/dev/null|grep -v \"%s:\"|expand",
" -l -d %s %s -C \"$1\" 2>/dev/null|grep -v \"$1:\"|expand",
opts->objdump_path ?: "objdump",
opts->disassembler_style ? "-M " : "",
opts->disassembler_style ?: "",
map__rip_2objdump(map, sym->start),
map__rip_2objdump(map, sym->end),
opts->show_asm_raw ? "" : "--no-show-raw",
opts->annotate_src ? "-S" : "",
symfs_filename, symfs_filename);
opts->annotate_src ? "-S" : "");
if (err < 0) {
pr_err("Failure allocating memory for the command to run\n");
@ -1756,7 +1755,8 @@ static int symbol__disassemble(struct symbol *sym, struct annotate_args *args)
close(stdout_fd[0]);
dup2(stdout_fd[1], 1);
close(stdout_fd[1]);
execl("/bin/sh", "sh", "-c", command, NULL);
execl("/bin/sh", "sh", "-c", command, "--", symfs_filename,
NULL);
perror(command);
exit(-1);
}