1 files changed, 118 insertions, 0 deletions
diff --git a/util/allocators/win32_crtdbg.c b/util/allocators/win32_crtdbg.c
new file mode 100644
index 000000000..1187e2fcd
--- /dev/null
+++ b/util/allocators/win32_crtdbg.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "win32_crtdbg.h"
+
+#if defined(GIT_MSVC_CRTDBG)
+
+#include "win32/w32_crtdbg_stacktrace.h"
+
+static void *crtdbg__malloc(size_t len, const char *file, int line)
+{
+	void *ptr = _malloc_dbg(len, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static void *crtdbg__calloc(size_t nelem, size_t elsize, const char *file, int line)
+{
+	void *ptr = _calloc_dbg(nelem, elsize, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static char *crtdbg__strdup(const char *str, const char *file, int line)
+{
+	char *ptr = _strdup_dbg(str, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static char *crtdbg__strndup(const char *str, size_t n, const char *file, int line)
+{
+	size_t length = 0, alloclength;
+	char *ptr;
+
+	length = p_strnlen(str, n);
+
+	if (GIT_ADD_SIZET_OVERFLOW(&alloclength, length, 1) ||
+		!(ptr = crtdbg__malloc(alloclength, file, line)))
+		return NULL;
+
+	if (length)
+		memcpy(ptr, str, length);
+
+	ptr[length] = '\0';
+
+	return ptr;
+}
+
+static char *crtdbg__substrdup(const char *start, size_t n, const char *file, int line)
+{
+	char *ptr;
+	size_t alloclen;
+
+	if (GIT_ADD_SIZET_OVERFLOW(&alloclen, n, 1) ||
+		!(ptr = crtdbg__malloc(alloclen, file, line)))
+		return NULL;
+
+	memcpy(ptr, start, n);
+	ptr[n] = '\0';
+	return ptr;
+}
+
+static void *crtdbg__realloc(void *ptr, size_t size, const char *file, int line)
+{
+	void *new_ptr = _realloc_dbg(ptr, size, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
+	if (!new_ptr) git_error_set_oom();
+	return new_ptr;
+}
+
+static void *crtdbg__reallocarray(void *ptr, size_t nelem, size_t elsize, const char *file, int line)
+{
+	size_t newsize;
+
+	if (GIT_MULTIPLY_SIZET_OVERFLOW(&newsize, nelem, elsize))
+		return NULL;
+
+	return crtdbg__realloc(ptr, newsize, file, line);
+}
+
+static void *crtdbg__mallocarray(size_t nelem, size_t elsize, const char *file, int line)
+{
+	return crtdbg__reallocarray(NULL, nelem, elsize, file, line);
+}
+
+static void crtdbg__free(void *ptr)
+{
+	free(ptr);
+}
+
+int git_win32_crtdbg_init_allocator(git_allocator *allocator)
+{
+	allocator->gmalloc = crtdbg__malloc;
+	allocator->gcalloc = crtdbg__calloc;
+	allocator->gstrdup = crtdbg__strdup;
+	allocator->gstrndup = crtdbg__strndup;
+	allocator->gsubstrdup = crtdbg__substrdup;
+	allocator->grealloc = crtdbg__realloc;
+	allocator->greallocarray = crtdbg__reallocarray;
+	allocator->gmallocarray = crtdbg__mallocarray;
+	allocator->gfree = crtdbg__free;
+	return 0;
+}
+
+#else
+
+int git_win32_crtdbg_init_allocator(git_allocator *allocator)
+{
+	GIT_UNUSED(allocator);
+	git_error_set(GIT_EINVALID, "crtdbg memory allocator not available");
+	return -1;
+}
+
+#endif