In some cases, it is difficult to determine the kind of malloc
based on the execution context, so a function to determine that
is helpful.
---
elf/dl-minimal.c | 8 ++++++++
include/rtld-malloc.h | 4 ++++
2 files changed, 12 insertions(+)
@@ -59,6 +59,14 @@ __rtld_malloc_init_stubs (void)
__rtld_realloc = &rtld_realloc;
}
+bool
+__rtld_malloc_is_full (void)
+{
+ /* The caller assumes that there is an active malloc. */
+ assert (__rtld_malloc != NULL);
+ return __rtld_malloc != &rtld_malloc;
+}
+
/* Lookup NAME at VERSION in the scope of MATCH. */
static void *
lookup_malloc_symbol (struct link_map *main_map, const char *name,
@@ -66,6 +66,10 @@ realloc (void *ptr, size_t size)
implementation. */
void __rtld_malloc_init_stubs (void) attribute_hidden;
+/* Return false if the active malloc is the ld.so minimal malloc, true
+ if it is the full implementation from libc.so. */
+_Bool __rtld_malloc_is_full (void) attribute_hidden;
+
/* Called shortly before the final self-relocation (when RELRO
variables are still writable) to activate the real malloc
implementation. MAIN_MAP is the link map of the executable. */