mcheck: add stats, add a comment with test results

My tests have been run on an U-Boot (of older version)
for ARM (64bits).

Signed-off-by: Eugene Uriev <eugeneuriev@gmail.com>

diff --git a/common/mcheck_core.inc.h b/common/mcheck_core.inc.h
index bade03598fbc085131881494c5bc7ea2edeab671..2f11ac567f635f030c786606aabe294d0e8ccb2f 100644 (file)
--- a/common/mcheck_core.inc.h
+++ b/common/mcheck_core.inc.h
@@ -48,6 +48,13 @@
  * rather in compile-time, by MCHECK_HEAP_PROTECTION macro. That guarantees that
  * we haven't missed first malloc.
  */
+
+/*
+ * Testing
+ *  This library had been successfully tested for U-Boot @ ARM SoC chip / 64bits.
+ *  Proven for both default and pedantic mode: confirms U-Boot to be clean, and catches
+ *  intentional/testing corruptions. Working with malloc_trim is not tested.
+ */
 #ifndef _MCHECKCORE_INC_H
 #define _MCHECKCORE_INC_H      1
 #include "mcheck.h"
@@ -70,6 +77,8 @@
 // avoid problems with BSS at early stage:
 static char mcheck_pedantic_flag __section(".data") = 0;
 static void *mcheck_registry[REGISTRY_SZ] __section(".data") = {0};
+static size_t mcheck_chunk_count __section(".data") = 0;
+static size_t mcheck_chunk_count_max __section(".data") = 0;
 
 typedef unsigned long long mcheck_elem;
 typedef struct {
@@ -102,7 +111,7 @@ static void mcheck_default_abort(enum mcheck_status status)
                msg = "bogus mcheck_status, library is buggy\n";
                break;
        }
-       printf("\n\nmcheck: %s!!!\n\n", msg);
+       printf("\n\nmcheck: %s!!! [%zu]\n\n", msg, mcheck_chunk_count_max);
 }
 
 static mcheck_abortfunc_t mcheck_abortfunc = &mcheck_default_abort;
@@ -173,6 +182,7 @@ static void *mcheck_free_helper(void *ptr, int clean_content)
                        break;
                }
 
+       --mcheck_chunk_count;
        return (char *)hdr - hdr->aln_skip;
 }
 
@@ -212,6 +222,10 @@ static void *mcheck_allocated_helper(void *altoghether_ptr, size_t customer_sz,
        for (i = 0; i < CANARY_DEPTH; ++i)
                tail->elems[i] = MAGICTAIL;
 
+       ++mcheck_chunk_count;
+       if (mcheck_chunk_count > mcheck_chunk_count_max)
+               mcheck_chunk_count_max = mcheck_chunk_count;
+
        for (i = 0; i < REGISTRY_SZ; ++i)
                if (!mcheck_registry[i]) {
                        mcheck_registry[i] = hdr;
@@ -283,6 +297,8 @@ void mcheck_on_ramrelocation(size_t offset)
                        printf("mcheck, WRN: forgetting %p chunk\n", p);
                        mcheck_registry[i] = 0;
                }
+
+       mcheck_chunk_count = 0;
 }
 #endif
 #endif