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perf tools: Use zfree() where applicable

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In places where the equivalent was already being done, i.e.:

   free(a);
   a = NULL;

And in placs where struct members are being freed so that if we have
some erroneous reference to its struct, then accesses to freed members
will result in segfaults, which we can detect faster than use after free
to areas that may still have something seemingly valid.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-jatyoofo5boc1bsvoig6bb6i@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2019-07-04 12:06:20 -03:00
parent 7f7c536f23
commit d8f9da2404
33 changed files with 100 additions and 99 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
tools/perf/tests/dwarf-unwind.c
View File

@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/zalloc.h>
#include <inttypes.h>
#include <unistd.h>
#include "tests.h"
@@ -115,8 +116,8 @@ noinline int test_dwarf_unwind__thread(struct thread *thread)
}
out:
free(sample.user_stack.data);
free(sample.user_regs.regs);
zfree(&sample.user_stack.data);
zfree(&sample.user_regs.regs);
return err;
}

3
tools/perf/tests/expr.c
View File

@@ -3,6 +3,7 @@
#include "util/expr.h"
#include "tests.h"
#include <stdlib.h>
#include <linux/zalloc.h>
static int test(struct parse_ctx *ctx, const char *e, double val2)
{
@@ -58,7 +59,7 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
TEST_ASSERT_VAL("find other", other[3] == NULL);
for (i = 0; i < num_other; i++)
free((void *)other[i]);
zfree(&other[i]);
free((void *)other);
return 0;

3
tools/perf/tests/mem2node.c
View File

@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <linux/bitmap.h>
#include <linux/zalloc.h>
#include "cpumap.h"
#include "mem2node.h"
#include "tests.h"
@@ -67,7 +68,7 @@ int test__mem2node(struct test *t __maybe_unused, int subtest __maybe_unused)
T("failed: mem2node__node", -1 == mem2node__node(&map, 0x1050));
for (i = 0; i < ARRAY_SIZE(nodes); i++)
free(nodes[i].set);
zfree(&nodes[i].set);
mem2node__exit(&map);
return 0;

3
tools/perf/tests/thread-map.c
View File

@@ -6,6 +6,7 @@
#include "tests.h"
#include "thread_map.h"
#include "debug.h"
#include <linux/zalloc.h>
#define NAME (const char *) "perf"
#define NAMEUL (unsigned long) NAME
@@ -133,7 +134,7 @@ int test__thread_map_remove(struct test *test __maybe_unused, int subtest __mayb
thread_map__remove(threads, 0));
for (i = 0; i < threads->nr; i++)
free(threads->map[i].comm);
zfree(&threads->map[i].comm);
free(threads);
return 0;