memory: add component init hook function

This commit fixes a long-standing break in the abstration of the
memory components. ompi_mpi_init.c was referencing the linux malloc
hook initilize function to ensure the hooks are initialized for
libmpi.so. The abstraction break has been fixed by adding a memory
base function that calls the open memory component's malloc hook init
function if it has one.

Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>

Author: hjelmn

ompi/runtime/ompi_mpi_init.c

@@ -98,15 +98,13 @@
 #endif
 #include "ompi/runtime/ompi_cr.h"
 
-#if defined(MEMORY_LINUX_PTMALLOC2) && MEMORY_LINUX_PTMALLOC2
-#include "opal/mca/memory/linux/memory_linux.h"
+#include "opal/mca/memory/base/base.h"
 /* So this sucks, but with OPAL in its own library that is brought in
    implicity from libmpi, there are times when the malloc initialize
    hook in the memory component doesn't work.  So we have to do it
    from here, since any MPI code is going to call MPI_Init... */
 OPAL_DECLSPEC void (*__malloc_initialize_hook) (void) =
-    opal_memory_linux_malloc_init_hook;
-#endif /* defined(MEMORY_LINUX_PTMALLOC2) && MEMORY_LINUX_PTMALLOC2 */
+    opal_memory_base_malloc_init_hook;
 
 /* This is required for the boundaries of the hash tables used to store
  * the F90 types returned by the MPI_Type_create_f90_XXX functions.

opal/mca/memory/base/base.h

@@ -32,5 +32,7 @@ BEGIN_C_DECLS
  */
 OPAL_DECLSPEC extern mca_base_framework_t opal_memory_base_framework;
 
+OPAL_DECLSPEC void opal_memory_base_malloc_init_hook (void);
+
 END_C_DECLS
 #endif /* OPAL_BASE_MEMORY_H */

opal/mca/memory/base/memory_base_open.c

@@ -70,6 +70,12 @@ static opal_memory_base_component_2_0_0_t empty_component = {
 opal_memory_base_component_2_0_0_t *opal_memory = &empty_component;
 
 
+void opal_memory_base_malloc_init_hook (void)
+{
+    if (opal_memory->memoryc_init_hook) {
+        opal_memory->memoryc_init_hook ();
+    }
+}
 
 /*
  * Function for finding and opening either all MCA components, or the one

opal/mca/memory/linux/memory_linux_component.c

@@ -100,6 +100,7 @@ opal_memory_linux_component_t mca_memory_linux_component = {
         /* Memory framework functions.  These function pointer values
            are replaced by memory_linux_ummunotify.c at run time if we
            end up using ummunotify support. */
+        .memoryc_init_hook = opal_memory_linux_malloc_init_hook,
         .memoryc_query = linux_query,
         .memoryc_register = opal_memory_base_component_register_empty,
         .memoryc_deregister = opal_memory_base_component_deregister_empty,

opal/mca/memory/memory.h

@@ -125,6 +125,11 @@ typedef int (*opal_memory_base_component_deregister_fn_t)(void *base,
 typedef void (*opal_memory_base_component_set_alignment_fn_t)(int use_memalign,
                                                               size_t memalign_threshold);
 
+/**
+ * Function to be called when initializing malloc hooks
+ */
+typedef void (*opal_memory_base_component_init_hook_fn_t)(void);
+
 /**
  * Structure for memory components.
  */
@@ -136,6 +141,10 @@ typedef struct opal_memory_base_component_2_0_0_t {
 
     opal_memory_base_component_query_fn_t memoryc_query;
 
+    /** This function will be called when the malloc hooks are
+     * initialized. It may be NULL if no hooks are needed. */
+    opal_memory_base_component_init_hook_fn_t memoryc_init_hook;
+
     /** Function to call when something has changed, as indicated by
         opal_memory_changed().  Will be ignored if the component does
         not provide an opal_memory_changed() macro that returns