perf annotate: Own objdump_path and disassembler_style strings

Make struct annotation_options own the strings objdump_path and
disassembler_style, freeing them on exit. Add missing strdup for
disassembler_style when read from a config file.

Committer notes:

Converted free(obj->member) to zfree(&obj->member) in
annotation_options__exit()
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Tom Rix <trix@redhat.com>
Cc: llvm@lists.linux.dev
Link: https://lore.kernel.org/r/20230328235543.1082207-2-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/arch/common.c

@@ -130,7 +130,7 @@ static int lookup_triplets(const char *const *triplets, const char *name)
 }
 
 static int perf_env__lookup_binutils_path(struct perf_env *env,
-					  const char *name, const char **path)
+					  const char *name, char **path)
 {
 	int idx;
 	const char *arch = perf_env__arch(env), *cross_env;
@@ -202,7 +202,7 @@ static int perf_env__lookup_binutils_path(struct perf_env *env,
 	return -1;
 }
 
-int perf_env__lookup_objdump(struct perf_env *env, const char **path)
+int perf_env__lookup_objdump(struct perf_env *env, char **path)
 {
 	/*
 	 * For live mode, env->arch will be NULL and we can use

tools/perf/arch/common.h

@@ -6,7 +6,7 @@
 
 struct perf_env;
 
-int perf_env__lookup_objdump(struct perf_env *env, const char **path);
+int perf_env__lookup_objdump(struct perf_env *env, char **path);
 bool perf_env__single_address_space(struct perf_env *env);
 
 #endif /* ARCH_PERF_COMMON_H */

tools/perf/builtin-annotate.c

@@ -517,6 +517,7 @@ int cmd_annotate(int argc, const char **argv)
 	struct itrace_synth_opts itrace_synth_opts = {
 		.set = 0,
 	};
+	const char *disassembler_style = NULL, *objdump_path = NULL;
 	struct option options[] = {
 	OPT_STRING('i', "input", &input_name, "file",
 		    "input file name"),
@@ -561,13 +562,13 @@ int cmd_annotate(int argc, const char **argv)
 		    "Interleave source code with assembly code (default)"),
 	OPT_BOOLEAN(0, "asm-raw", &annotate.opts.show_asm_raw,
 		    "Display raw encoding of assembly instructions (default)"),
-	OPT_STRING('M', "disassembler-style", &annotate.opts.disassembler_style, "disassembler style",
+	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
 		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
 	OPT_STRING(0, "prefix", &annotate.opts.prefix, "prefix",
 		    "Add prefix to source file path names in programs (with --prefix-strip)"),
 	OPT_STRING(0, "prefix-strip", &annotate.opts.prefix_strip, "N",
 		    "Strip first N entries of source file path name in programs (with --prefix)"),
-	OPT_STRING(0, "objdump", &annotate.opts.objdump_path, "path",
+	OPT_STRING(0, "objdump", &objdump_path, "path",
 		   "objdump binary to use for disassembly and annotations"),
 	OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
 		    "Enable symbol demangling"),
@@ -618,6 +619,17 @@ int cmd_annotate(int argc, const char **argv)
 		annotate.sym_hist_filter = argv[0];
 	}
 
+	if (disassembler_style) {
+		annotate.opts.disassembler_style = strdup(disassembler_style);
+		if (!annotate.opts.disassembler_style)
+			return -ENOMEM;
+	}
+	if (objdump_path) {
+		annotate.opts.objdump_path = strdup(objdump_path);
+		if (!annotate.opts.objdump_path)
+			return -ENOMEM;
+	}
+
 	if (annotate_check_args(&annotate.opts) < 0)
 		return -EINVAL;
 

tools/perf/builtin-report.c

@@ -1226,6 +1226,7 @@ int cmd_report(int argc, const char **argv)
 	};
 	char *sort_order_help = sort_help("sort by key(s):");
 	char *field_order_help = sort_help("output field(s): overhead period sample ");
+	const char *disassembler_style = NULL, *objdump_path = NULL;
 	const struct option options[] = {
 	OPT_STRING('i', "input", &input_name, "file",
 		    "input file name"),
@@ -1322,7 +1323,7 @@ int cmd_report(int argc, const char **argv)
 		    "Interleave source code with assembly code (default)"),
 	OPT_BOOLEAN(0, "asm-raw", &report.annotation_opts.show_asm_raw,
 		    "Display raw encoding of assembly instructions (default)"),
-	OPT_STRING('M', "disassembler-style", &report.annotation_opts.disassembler_style, "disassembler style",
+	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
 		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
 	OPT_STRING(0, "prefix", &report.annotation_opts.prefix, "prefix",
 		    "Add prefix to source file path names in programs (with --prefix-strip)"),
@@ -1341,7 +1342,7 @@ int cmd_report(int argc, const char **argv)
 		    parse_branch_mode),
 	OPT_BOOLEAN(0, "branch-history", &branch_call_mode,
 		    "add last branch records to call history"),
-	OPT_STRING(0, "objdump", &report.annotation_opts.objdump_path, "path",
+	OPT_STRING(0, "objdump", &objdump_path, "path",
 		   "objdump binary to use for disassembly and annotations"),
 	OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
 		    "Disable symbol demangling"),
@@ -1419,6 +1420,17 @@ int cmd_report(int argc, const char **argv)
 		report.symbol_filter_str = argv[0];
 	}
 
+	if (disassembler_style) {
+		report.annotation_opts.disassembler_style = strdup(disassembler_style);
+		if (!report.annotation_opts.disassembler_style)
+			return -ENOMEM;
+	}
+	if (objdump_path) {
+		report.annotation_opts.objdump_path = strdup(objdump_path);
+		if (!report.annotation_opts.objdump_path)
+			return -ENOMEM;
+	}
+
 	if (annotate_check_args(&report.annotation_opts) < 0) {
 		ret = -EINVAL;
 		goto exit;

tools/perf/builtin-top.c

@@ -1439,6 +1439,7 @@ int cmd_top(int argc, const char **argv)
 	};
 	struct record_opts *opts = &top.record_opts;
 	struct target *target = &opts->target;
+	const char *disassembler_style = NULL, *objdump_path = NULL;
 	const struct option options[] = {
 	OPT_CALLBACK('e', "event", &top.evlist, "event",
 		     "event selector. use 'perf list' to list available events",
@@ -1524,9 +1525,9 @@ int cmd_top(int argc, const char **argv)
 	OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
 		    "Enable kernel symbol demangling"),
 	OPT_BOOLEAN(0, "no-bpf-event", &top.record_opts.no_bpf_event, "do not record bpf events"),
-	OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path",
+	OPT_STRING(0, "objdump", &objdump_path, "path",
 		    "objdump binary to use for disassembly and annotations"),
-	OPT_STRING('M', "disassembler-style", &top.annotation_opts.disassembler_style, "disassembler style",
+	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
 		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
 	OPT_STRING(0, "prefix", &top.annotation_opts.prefix, "prefix",
 		    "Add prefix to source file path names in programs (with --prefix-strip)"),
@@ -1618,6 +1619,18 @@ int cmd_top(int argc, const char **argv)
 	if (argc)
 		usage_with_options(top_usage, options);
 
+	if (disassembler_style) {
+		top.annotation_opts.disassembler_style = strdup(disassembler_style);
+		if (!top.annotation_opts.disassembler_style)
+			return -ENOMEM;
+	}
+	if (objdump_path) {
+		top.annotation_opts.objdump_path = strdup(objdump_path);
+		if (!top.annotation_opts.objdump_path)
+			return -ENOMEM;
+	}
+
+
 	status = symbol__validate_sym_arguments();
 	if (status)
 		goto out_delete_evlist;

tools/perf/util/annotate.c

@@ -3206,7 +3206,11 @@ static int annotation__config(const char *var, const char *value, void *data)
 	} else if (!strcmp(var, "annotate.use_offset")) {
 		opt->use_offset = perf_config_bool("use_offset", value);
 	} else if (!strcmp(var, "annotate.disassembler_style")) {
-		opt->disassembler_style = value;
+		opt->disassembler_style = strdup(value);
+		if (!opt->disassembler_style) {
+			pr_err("Not enough memory for annotate.disassembler_style\n");
+			return -1;
+		}
 	} else if (!strcmp(var, "annotate.demangle")) {
 		symbol_conf.demangle = perf_config_bool("demangle", value);
 	} else if (!strcmp(var, "annotate.demangle_kernel")) {
@@ -3231,8 +3235,10 @@ void annotation_options__init(struct annotation_options *opt)
 }
 
 
-void annotation_options__exit(struct annotation_options *opt __maybe_unused)
+void annotation_options__exit(struct annotation_options *opt)
 {
+	zfree(&opt->disassembler_style);
+	zfree(&opt->objdump_path);
 }
 
 void annotation_config__init(struct annotation_options *opt)

tools/perf/util/annotate.h

@@ -94,8 +94,8 @@ struct annotation_options {
 	int  min_pcnt;
 	int  max_lines;
 	int  context;
-	const char *objdump_path;
-	const char *disassembler_style;
+	char *objdump_path;
+	char *disassembler_style;
 	const char *prefix;
 	const char *prefix_strip;
 	unsigned int percent_type;