Apply Santtu++'s 01_exec_memory_alloc.diff from TT #18.

From: Mark Glines <mark@glines.org>

Updated Infinoid's 01 patch to work in HEAD
---

 config/gen/platform/generic/memexec.c    |    8 +++++---
 config/gen/platform/openbsd/memexec.c    |    6 ++++--
 config/gen/platform/platform_interface.h |    8 ++++----
 src/jit.c                                |    4 ++--
 src/jit/i386/jit_defs.c                  |    6 +++---
 5 files changed, 18 insertions(+), 14 deletions(-)


diff --git a/config/gen/platform/generic/memexec.c b/config/gen/platform/generic/memexec.c
index 813673c..ebcb911 100644
--- a/config/gen/platform/generic/memexec.c
+++ b/config/gen/platform/generic/memexec.c
@@ -47,14 +47,16 @@ mem_alloc_executable(size_t size)
 
 /*
 
-=item C<void mem_free_executable(void *p)>
+=item C<void mem_free_executable(void *p, size_t)>
+
+Free a buffer allocated with mem_alloc_executable().
 
 =cut
 
 */
 
 void
-mem_free_executable(void *p)
+mem_free_executable(void *p, size_t size)
 {
     free(p);
 }
@@ -72,7 +74,7 @@ The intermediate temp is required because we don't know the old size
 */
 
 void *
-mem_realloc_executable(void* oldp, size_t newsize)
+mem_realloc_executable(void* oldp, size_t oldsize, size_t newsize)
 {
     void *temp;
     void *newp;
diff --git a/config/gen/platform/openbsd/memexec.c b/config/gen/platform/openbsd/memexec.c
index 8488bc2..95bfd3e 100644
--- a/config/gen/platform/openbsd/memexec.c
+++ b/config/gen/platform/openbsd/memexec.c
@@ -49,14 +49,16 @@ mem_alloc_executable(size_t size)
 
 /*
 
-=item C<void mem_free_executable(void *p)>
+=item C<void mem_free_executable(void *p, size_t size)>
+
+Free a buffer allocated with mem_alloc_executable().
 
 =cut
 
 */
 
 void
-mem_free_executable(void *p)
+mem_free_executable(void *p, size_t size)
 {
     free(p);
 }
diff --git a/config/gen/platform/platform_interface.h b/config/gen/platform/platform_interface.h
index 9985244..7712ea8 100644
--- a/config/gen/platform/platform_interface.h
+++ b/config/gen/platform/platform_interface.h
@@ -40,12 +40,12 @@ void Parrot_free_memalign(void *);
 
 #ifdef PARROT_HAS_EXEC_PROTECT
 void *mem_alloc_executable(size_t);
-void mem_free_executable(void *);
-void *mem_realloc_executable(void *, size_t);
+void mem_free_executable(void *, size_t);
+void *mem_realloc_executable(void *, size_t, size_t);
 #else
 #  define mem_alloc_executable mem_sys_allocate
-#  define mem_free_executable mem_sys_free
-#  define mem_realloc_executable mem_sys_realloc
+#  define mem_free_executable(a, b) mem_sys_free(a)
+#  define mem_realloc_executable(a, b, c) mem_sys_realloc((a), (c))
 #endif
 
 void* Parrot_memcpy_aligned(void*, void*, size_t);
diff --git a/src/jit.c b/src/jit.c
index 956ba5c..70756d8 100644
--- a/src/jit.c
+++ b/src/jit.c
@@ -1257,7 +1257,7 @@ Parrot_destroy_jit(void *ptr)
     }
     /* arena stuff */
     mem_sys_free(jit_info->arena.op_map);
-    mem_free_executable(jit_info->arena.start);
+    mem_free_executable(jit_info->arena.start, jit_info->arena.size);
     fixup = jit_info->arena.fixups;
     while (fixup) {
         next_f = fixup->next;
@@ -1525,7 +1525,7 @@ parrot_build_asm(PARROT_INTERP, ARGIN(opcode_t *code_start), ARGIN(opcode_t *cod
                 Parrot_jit_extend_arena(jit_info);
 #else
                 new_arena = (char *)mem_realloc_executable(jit_info->arena.start,
-                        (size_t)jit_info->arena.size * 2);
+                        jit_info->arena.size, (size_t)jit_info->arena.size * 2);
                 jit_info->arena.size *= 2;
                 jit_info->native_ptr  = new_arena +
                     (jit_info->native_ptr - jit_info->arena.start);
diff --git a/src/jit/i386/jit_defs.c b/src/jit/i386/jit_defs.c
index dac55fa..0278a71 100644
--- a/src/jit/i386/jit_defs.c
+++ b/src/jit/i386/jit_defs.c
@@ -2289,7 +2289,7 @@ Parrot_jit_build_call_func(PARROT_INTERP, PMC *pmc_nci, STRING *signature)
             case '2':
             case '3':
             case '4':
-                mem_free_executable(jit_info.native_ptr);
+                mem_free_executable(jit_info.native_ptr, JIT_ALLOC_SIZE);
                 return NULL;
                 break;
                 /* This might be right. Or not... */
@@ -2306,7 +2306,7 @@ Parrot_jit_build_call_func(PARROT_INTERP, PMC *pmc_nci, STRING *signature)
                  * oops unknown signature:
                  * cleanup and try nci.c
                  */
-                mem_free_executable(jit_info.native_ptr);
+                mem_free_executable(jit_info.native_ptr, JIT_ALLOC_SIZE);
                 return NULL;
         }
         args_offset +=4;
@@ -2435,7 +2435,7 @@ Parrot_jit_build_call_func(PARROT_INTERP, PMC *pmc_nci, STRING *signature)
              * oops unknown signature:
              * cleanup and try nci.c
              */
-            mem_free_executable(jit_info.native_ptr);
+            mem_free_executable(jit_info.native_ptr, JIT_ALLOC_SIZE);
             return NULL;
     }