vlib: add "memory-trace stats-segment"

Type: feature

Change-Id: Ie020fd7e2618284a63efbeb9895068f27c0fb9ab
Signed-off-by: Dave Barach <dave@barachs.net>

5 files changed, 52 insertions, 21 deletions

diff --git a/src/vppinfra/dlmalloc.c b/src/vppinfra/dlmalloc.c
index 60bd8d55646..524c57b210b 100644
--- a/src/vppinfra/dlmalloc.c
+++ b/src/vppinfra/dlmalloc.c
@@ -4093,7 +4093,7 @@ void mspace_get_address_and_size (mspace msp, char **addrp, size_t *sizep)
 {
   mstate ms;
   msegment *this_seg;
-  
+
   ms = (mstate)msp;
   this_seg = &ms->seg;
 
@@ -4155,9 +4155,18 @@ int mspace_enable_disable_trace (mspace msp, int enable)
   return (was_enabled);
 }
 
-void* mspace_get_aligned (mspace msp, 
+int mspace_is_traced (mspace msp)
+{
+  mstate ms = (mstate)msp;
+
+  if (use_trace(ms))
+    return 1;
+  return 0;
+}
+
+void* mspace_get_aligned (mspace msp,
                           unsigned long n_user_data_bytes,
-                          unsigned long align, 
+                          unsigned long align,
                           unsigned long align_offset) {
   char *rv;
   unsigned long searchp;
@@ -4165,13 +4174,13 @@ void* mspace_get_aligned (mspace msp,
   mstate ms = (mstate)msp;
 
   /*
-   * Allocate space for the "Where's Waldo?" pointer 
+   * Allocate space for the "Where's Waldo?" pointer
    * the base of the dlmalloc object
    */
   n_user_data_bytes += sizeof(unsigned);
 
-  /* 
-   * Alignment requests less than the size of an mmx vector are ignored 
+  /*
+   * Alignment requests less than the size of an mmx vector are ignored
    */
   if (align < sizeof (uword)) {
     rv = mspace_malloc (msp, n_user_data_bytes);
@@ -4181,7 +4190,7 @@ void* mspace_get_aligned (mspace msp,
     if (use_trace(ms)) {
       mchunkptr p  = mem2chunk(rv);
       size_t psize = chunksize(p);
-      
+
       mheap_get_trace ((unsigned long)rv + sizeof (unsigned), psize);
     }
 
@@ -4196,15 +4205,15 @@ void* mspace_get_aligned (mspace msp,
    * Alignment requests greater than 4K must be at offset zero,
    * and must be freed using mspace_free_no_offset - or never freed -
    * since the "Where's Waldo?" pointer would waste too much space.
-   * 
-   * Waldo is the address of the chunk of memory returned by mspace_malloc, 
+   *
+   * Waldo is the address of the chunk of memory returned by mspace_malloc,
    * which we need later to call mspace_free...
    */
   if (align > 4<<10 || align_offset == ~0UL) {
     n_user_data_bytes -= sizeof(unsigned);
     assert(align_offset == 0);
     rv = internal_memalign(ms, (size_t)align, n_user_data_bytes);
-    
+
     /* Trace the allocation */
     if (rv && use_trace(ms)) {
       mchunkptr p  = mem2chunk(rv);
diff --git a/src/vppinfra/dlmalloc.h b/src/vppinfra/dlmalloc.h
index 216df4737ca..b8adf74831d 100644
--- a/src/vppinfra/dlmalloc.h
+++ b/src/vppinfra/dlmalloc.h
@@ -1447,9 +1447,9 @@ DLMALLOC_EXPORT int mspace_trim(mspace msp, size_t pad);
 */
 DLMALLOC_EXPORT int mspace_mallopt(int, int);
 
-DLMALLOC_EXPORT void* mspace_get_aligned (mspace msp, 
+DLMALLOC_EXPORT void* mspace_get_aligned (mspace msp,
                                           unsigned long n_user_data_bytes,
-                                          unsigned long align, 
+                                          unsigned long align,
                                           unsigned long align_offset);
 
 DLMALLOC_EXPORT int mspace_is_heap_object (mspace msp, void *p);
@@ -1463,6 +1463,7 @@ DLMALLOC_EXPORT void *mspace_least_addr (mspace msp);
 DLMALLOC_EXPORT void mheap_get_trace (uword offset, uword size);
 DLMALLOC_EXPORT void mheap_put_trace (uword offset, uword size);
 DLMALLOC_EXPORT int mspace_enable_disable_trace (mspace msp, int enable);
+DLMALLOC_EXPORT int mspace_is_traced (mspace msp);
 
 #endif /* MSPACES */
 
diff --git a/src/vppinfra/mem.h b/src/vppinfra/mem.h
index 1e14698af98..e31ec82e7c5 100644
--- a/src/vppinfra/mem.h
+++ b/src/vppinfra/mem.h
@@ -274,6 +274,8 @@ void clib_mem_validate (void);
 
 void clib_mem_trace (int enable);
 
+int clib_mem_is_traced (void);
+
 typedef struct
 {
   /* Total number of objects allocated. */
diff --git a/src/vppinfra/mem_dlmalloc.c b/src/vppinfra/mem_dlmalloc.c
index e83e0e89d21..99f1c04f3eb 100644
--- a/src/vppinfra/mem_dlmalloc.c
+++ b/src/vppinfra/mem_dlmalloc.c
@@ -56,6 +56,10 @@ typedef struct
 
   /* Hash table mapping mheap offset to trace index. */
   uword *trace_index_by_offset;
+
+  /* So we can easily shut off current segment trace, if any */
+  void *current_traced_mheap;
+
 } mheap_trace_main_t;
 
 mheap_trace_main_t mheap_trace_main;
@@ -69,7 +73,7 @@ mheap_get_trace (uword offset, uword size)
   mheap_trace_t trace;
   uword save_enabled;
 
-  if (tm->enabled == 0)
+  if (tm->enabled == 0 || (clib_mem_get_heap () != tm->current_traced_mheap))
     return;
 
   /* Spurious Coverity warnings be gone. */
@@ -80,11 +84,6 @@ mheap_get_trace (uword offset, uword size)
   if (n_callers == 0)
     return;
 
-  /* $$$ This looks like dreck to remove... */
-  if (0)
-    for (i = n_callers; i < ARRAY_LEN (trace.callers); i++)
-      trace.callers[i] = 0;
-
   clib_spinlock_lock (&tm->lock);
 
   /* Turn off tracing to avoid embarrassment... */
@@ -291,7 +290,8 @@ format_mheap_trace (u8 * s, va_list * va)
   int i;
 
   clib_spinlock_lock (&tm->lock);
-  if (vec_len (tm->traces) > 0)
+  if (vec_len (tm->traces) > 0 &&
+      clib_mem_get_heap () == tm->current_traced_mheap)
     {
       have_traces = 1;
 
@@ -372,7 +372,8 @@ format_mheap (u8 * s, va_list * va)
 	format (s, "\n    max total allocated %U", format_msize, mi.usmblks);
     }
 
-  s = format (s, "\n%U", format_mheap_trace, tm, verbose);
+  if (mspace_is_traced (heap))
+    s = format (s, "\n%U", format_mheap_trace, tm, verbose);
   return s;
 }
 
@@ -404,9 +405,21 @@ void
 clib_mem_trace (int enable)
 {
   mheap_trace_main_t *tm = &mheap_trace_main;
+  void *current_heap = clib_mem_get_heap ();
 
   tm->enabled = enable;
-  mheap_trace (clib_mem_get_heap (), enable);
+  mheap_trace (current_heap, enable);
+
+  if (enable)
+    tm->current_traced_mheap = current_heap;
+  else
+    tm->current_traced_mheap = 0;
+}
+
+int
+clib_mem_is_traced (void)
+{
+  return mspace_is_traced (clib_mem_get_heap ());
 }
 
 uword
diff --git a/src/vppinfra/mem_mheap.c b/src/vppinfra/mem_mheap.c
index 4077bf279fd..3046bd22d0a 100644
--- a/src/vppinfra/mem_mheap.c
+++ b/src/vppinfra/mem_mheap.c
@@ -148,6 +148,12 @@ clib_mem_trace (int enable)
   mheap_trace (clib_mem_get_heap (), enable);
 }
 
+int
+clib_mem_is_traced (void)
+{
+  return mheap_is_traced (clib_mem_get_heap ());
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *