More Perl malloc debugging magic from Ilya. Seems to work in

Linux, Solaris, AIX.  Had to do #ifdef OS2 for the <io.h> in
malloc.c, found in AIX since there is no such header.
In Tru64 miniperl fails an assert: "free()ed/realloc()ed-away
memory was overwritten?"
(In IRIX compiles but that doesn't prove much since in IRIX
Perl's malloc is simply not used.)

p4raw-id: //depot/perl@19831

1 files changed, 54 insertions, 0 deletions

diff --git a/malloc_ctl.h b/malloc_ctl.h
new file mode 100644
index 0000000000..e0bee00ea3
--- /dev/null
+++ b/malloc_ctl.h
@@ -0,0 +1,54 @@
+#ifndef MALLOC_CTL_H
+#  define MALLOC_CTL_H
+
+struct perl_mstats {
+    UV *nfree;
+    UV *ntotal;
+    IV topbucket, topbucket_ev, topbucket_odd, totfree, total, total_chain;
+    IV total_sbrk, sbrks, sbrk_good, sbrk_slack, start_slack, sbrked_remains;
+    IV minbucket;
+    /* Level 1 info */
+    UV *bucket_mem_size;
+    UV *bucket_available_size;
+    UV nbuckets;
+};
+typedef struct perl_mstats perl_mstats_t;
+
+START_EXTERN_C
+Malloc_t Perl_malloc (MEM_SIZE nbytes);
+Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size);
+Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes);
+/* 'mfree' rather than 'free', since there is already a 'perl_free'
+ * that causes clashes with case-insensitive linkers */
+Free_t   Perl_mfree (Malloc_t where);
+END_EXTERN_C
+
+#ifndef NO_MALLOC_DYNAMIC_CFG
+
+enum {
+  MallocCfg_FIRST_SBRK,
+  MallocCfg_MIN_SBRK,
+  MallocCfg_MIN_SBRK_FRAC1000,
+  MallocCfg_SBRK_ALLOW_FAILURES,
+  MallocCfg_SBRK_FAILURE_PRICE,
+  MallocCfg_sbrk_goodness,
+
+  MallocCfg_filldead,
+  MallocCfg_fillalive,
+  MallocCfg_fillcheck,
+
+  MallocCfg_skip_cfg_env,
+  MallocCfg_cfg_env_read,
+
+  MallocCfg_emergency_buffer_size,
+  MallocCfg_emergency_buffer_last_req,
+
+  MallocCfg_emergency_buffer_prepared_size,
+
+  MallocCfg_last
+};
+extern IV *MallocCfg_ptr;
+
+#endif
+
+#endif