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perf tools: Introduce zfree

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For the frequent idiom of:

   free(ptr);
   ptr = NULL;

Make it expect a pointer to the pointer being freed, so that it becomes
clear at first sight that the variable being freed is being modified.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-pfw02ezuab37kha18wlut7ir@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2013-12-26 17:41:15 -03:00
parent f5385650c0
commit 046625231a
22 changed files with 56 additions and 103 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
tools/perf/util/machine.c
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@@ -102,8 +102,7 @@ void machine__exit(struct machine *machine)
map_groups__exit(&machine->kmaps);
dsos__delete(&machine->user_dsos);
dsos__delete(&machine->kernel_dsos);
free(machine->root_dir);
machine->root_dir = NULL;
zfree(&machine->root_dir);
}
void machine__delete(struct machine *machine)
@@ -562,11 +561,10 @@ void machine__destroy_kernel_maps(struct machine *machine)
* on one of them.
*/
if (type == MAP__FUNCTION) {
free((char *)kmap->ref_reloc_sym->name);
kmap->ref_reloc_sym->name = NULL;
free(kmap->ref_reloc_sym);
}
kmap->ref_reloc_sym = NULL;
zfree((char **)&kmap->ref_reloc_sym->name);
zfree(&kmap->ref_reloc_sym);
} else
kmap->ref_reloc_sym = NULL;
}
map__delete(machine->vmlinux_maps[type]);