[Xen-devel] [PATCH 1 of 7] xl: Return void from libxl_free() and libxl_free_all()

[Gianni Tedesco <gianni.tedesco@xxxxxxxxxx>]

 tools/libxl/libxl_internal.c |  11 +++++------
 tools/libxl/libxl_internal.h |   4 ++--
 2 files changed, 7 insertions(+), 8 deletions(-)


Also abort() if a pointer passed in to libxl_free() cannot be found in the
mini-gc structures. This exposes several real bugs (ie. not just the
libxl_free() something that was allocated via malloc variety).

Signed-off-by: Gianni Tedesco <gianni.tedesco@xxxxxxxxxx>

diff -r 8992134dcfd0 -r 1b538b12751c tools/libxl/libxl_internal.c
--- a/tools/libxl/libxl_internal.c      Wed Aug 04 19:24:17 2010 +0100
+++ b/tools/libxl/libxl_internal.c      Tue Aug 10 15:44:05 2010 +0100
@@ -59,26 +59,26 @@ int libxl_ptr_add(libxl_ctx *ctx, void *
     return 0;
 }
 
-int libxl_free(libxl_ctx *ctx, void *ptr)
+void libxl_free(libxl_ctx *ctx, void *ptr)
 {
     int i;
 
     if (!ptr)
-        return 0;
+        return;
 
     /* remove the pointer from the tracked ptrs */
     for (i = 0; i < ctx->alloc_maxsize; i++) {
         if (ctx->alloc_ptrs[i] == ptr) {
             ctx->alloc_ptrs[i] = NULL;
             free(ptr);
-            return 0;
+            return;
         }
     }
     /* haven't find the pointer, really bad */
-    return -1;
+    abort();
 }
 
-int libxl_free_all(libxl_ctx *ctx)
+void libxl_free_all(libxl_ctx *ctx)
 {
     void *ptr;
     int i;
@@ -88,7 +88,6 @@ int libxl_free_all(libxl_ctx *ctx)
         ctx->alloc_ptrs[i] = NULL;
         free(ptr);
     }
-    return 0;
 }
 
 void *libxl_zalloc(libxl_ctx *ctx, int bytes)
diff -r 8992134dcfd0 -r 1b538b12751c tools/libxl/libxl_internal.h
--- a/tools/libxl/libxl_internal.h      Wed Aug 04 19:24:17 2010 +0100
+++ b/tools/libxl/libxl_internal.h      Tue Aug 10 15:44:05 2010 +0100
@@ -108,8 +108,8 @@ int xs_writev(struct xs_handle *xsh, xs_
 
 /* memory allocation tracking/helpers */
 int libxl_ptr_add(libxl_ctx *ctx, void *ptr);
-int libxl_free(libxl_ctx *ctx, void *ptr);
-int libxl_free_all(libxl_ctx *ctx);
+void libxl_free(libxl_ctx *ctx, void *ptr);
+void libxl_free_all(libxl_ctx *ctx);
 void *libxl_zalloc(libxl_ctx *ctx, int bytes);
 void *libxl_calloc(libxl_ctx *ctx, size_t nmemb, size_t size);
 char *libxl_sprintf(libxl_ctx *ctx, const char *fmt, ...) PRINTF_ATTRIBUTE(2, 
3);

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