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Replace duktape's default allocators. Realloc to zero is not guaranteed to free on all platforms

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This commit is contained in:
Daniel Silverstone 2015-11-22 14:36:24 +00:00
parent b41b672fe5
commit 9fe01f09c8
1 changed files with 41 additions and 1 deletions
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42
javascript/duktape/dukky.c
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@ -289,6 +289,41 @@ dukky_inject_not_ctr(duk_context *ctx, int idx, const char *name)
return;
}
/* Duktape heap utility functions */
/* We need to override the defaults because not all platforms are fully ANSI
* compatible. E.g. RISC OS gets upset if we malloc or realloc a zero byte
* block, as do debugging tools such as Electric Fence by Bruce Perens.
*/
static void *dukky_alloc_function(void *udata, duk_size_t size)
{
if (size == 0)
return NULL;
return malloc(size);
}
static void *dukky_realloc_function(void *udata, void *ptr, duk_size_t size)
{
if (ptr == NULL && size == 0)
return NULL;
if (size == 0) {
free(ptr);
return NULL;
}
return realloc(ptr, size);
}
static void dukky_free_function(void *udata, void *ptr)
{
if (ptr != NULL)
free(ptr);
}
/**************************************** js.h ******************************/
struct jscontext {
duk_context *ctx;
@ -322,7 +357,12 @@ nserror js_newcontext(int timeout, jscallback *cb, void *cbctx,
*jsctx = NULL;
LOG("Creating new duktape javascript context");
if (ret == NULL) return NSERROR_NOMEM;
ctx = ret->ctx = duk_create_heap_default();
ctx = ret->ctx = duk_create_heap(
dukky_alloc_function,
dukky_realloc_function,
dukky_free_function,
NULL,
NULL);
if (ret->ctx == NULL) { free(ret); return NSERROR_NOMEM; }
/* Create the prototype stuffs */
duk_push_global_object(ctx);