alloc: rename the win32 leakcheck allocator

The win32 leakchecking system is now named win32_leakcheck.  Update the
allocator to match.

Author: ethomson

src/alloc.c

@@ -9,14 +9,14 @@
 #include "runtime.h"
 
 #include "allocators/stdalloc.h"
-#include "allocators/win32_crtdbg.h"
+#include "allocators/win32_leakcheck.h"
 
 git_allocator git__allocator;
 
 static int setup_default_allocator(void)
 {
 #if defined(GIT_MSVC_CRTDBG)
-	return git_win32_crtdbg_init_allocator(&git__allocator);
+	return git_win32_leakcheck_init_allocator(&git__allocator);
 #else
 	return git_stdalloc_init_allocator(&git__allocator);
 #endif

src/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_leakcheck.h"
+
+#if defined(GIT_MSVC_CRTDBG)
+
+#include "win32/w32_leakcheck.h"
+
+static void *leakcheck_malloc(size_t len, const char *file, int line)
+{
+	void *ptr = _malloc_dbg(len, _NORMAL_BLOCK, git_win32_leakcheck_stacktrace(1,file), line);
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static void *leakcheck_calloc(size_t nelem, size_t elsize, const char *file, int line)
+{
+	void *ptr = _calloc_dbg(nelem, elsize, _NORMAL_BLOCK, git_win32_leakcheck_stacktrace(1,file), line);
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static char *leakcheck_strdup(const char *str, const char *file, int line)
+{
+	char *ptr = _strdup_dbg(str, _NORMAL_BLOCK, git_win32_leakcheck_stacktrace(1,file), line);
+	if (!ptr) git_error_set_oom();
+	return ptr;
+}
+
+static char *leakcheck_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 = leakcheck_malloc(alloclength, file, line)))
+		return NULL;
+
+	if (length)
+		memcpy(ptr, str, length);
+
+	ptr[length] = '\0';
+
+	return ptr;
+}
+
+static char *leakcheck_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 = leakcheck_malloc(alloclen, file, line)))
+		return NULL;
+
+	memcpy(ptr, start, n);
+	ptr[n] = '\0';
+	return ptr;
+}
+
+static void *leakcheck_realloc(void *ptr, size_t size, const char *file, int line)
+{
+	void *new_ptr = _realloc_dbg(ptr, size, _NORMAL_BLOCK, git_win32_leakcheck_stacktrace(1,file), line);
+	if (!new_ptr) git_error_set_oom();
+	return new_ptr;
+}
+
+static void *leakcheck_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 leakcheck_realloc(ptr, newsize, file, line);
+}
+
+static void *leakcheck_mallocarray(size_t nelem, size_t elsize, const char *file, int line)
+{
+	return leakcheck_reallocarray(NULL, nelem, elsize, file, line);
+}
+
+static void leakcheck_free(void *ptr)
+{
+	free(ptr);
+}
+
+int git_win32_leakcheck_init_allocator(git_allocator *allocator)
+{
+	allocator->gmalloc = leakcheck_malloc;
+	allocator->gcalloc = leakcheck_calloc;
+	allocator->gstrdup = leakcheck_strdup;
+	allocator->gstrndup = leakcheck_strndup;
+	allocator->gsubstrdup = leakcheck_substrdup;
+	allocator->grealloc = leakcheck_realloc;
+	allocator->greallocarray = leakcheck_reallocarray;
+	allocator->gmallocarray = leakcheck_mallocarray;
+	allocator->gfree = leakcheck_free;
+	return 0;
+}
+
+#else
+
+int git_win32_leakcheck_init_allocator(git_allocator *allocator)
+{
+	GIT_UNUSED(allocator);
+	git_error_set(GIT_EINVALID, "leakcheck memory allocator not available");
+	return -1;
+}
+
+#endif

src/allocators/win32_leakcheck.c

@@ -5,13 +5,13 @@
  * a Linking Exception. For full terms see the included COPYING file.
  */
 
-#ifndef INCLUDE_allocators_crtdbg_h
-#define INCLUDE_allocators_crtdbg_h
+#ifndef INCLUDE_allocators_win32_leakcheck_h
+#define INCLUDE_allocators_win32_leakcheck_h
 
 #include "common.h"
 
 #include "alloc.h"
 
-int git_win32_crtdbg_init_allocator(git_allocator *allocator);
+int git_win32_leakcheck_init_allocator(git_allocator *allocator);
 
 #endif