From 47128b7def4954c4cf544924c94f018d88033374 Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@kth.se>
Date: Sun, 2 Sep 2018 15:32:56 +0200
Subject: misc
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Signed-off-by: Mattias Andrée <maandree@kth.se>
---
 test.c | 131 ++++++++++++++++++++++++++++++++++++++---------------------------
 1 file changed, 76 insertions(+), 55 deletions(-)

(limited to 'test.c')

diff --git a/test.c b/test.c
index 084359e..b954ccd 100644
--- a/test.c
+++ b/test.c
@@ -2,10 +2,12 @@
 #include "libsimple.h"
 #include "test.h"
 #include <sys/syscall.h>
-#include <malloc.h>
 
 #undef strndup
 #undef memdup
+#undef memalign
+#undef valloc
+#undef pvalloc
 
 
 char *argv0 = (char []){"<test>"};
@@ -21,6 +23,7 @@ volatile int stderr_real = 0;
 volatile int stderr_ok = 0;
 
 static volatile int custom_malloc = 0;
+static volatile void *just_alloced = NULL;
 
 
 size_t
@@ -58,59 +61,6 @@ get_allocinfo(void *ptr)
 }
 
 
-void *
-malloc(size_t size)
-{
-	size_t alignment = get_pagesize();
-	while (alignment < sizeof(long long int))
-		alignment *= 2;
-	while (alignment < sizeof(long double))
-		alignment *= 2;
-	return memalign(alignment, size);
-}
-
-
-void *
-calloc(size_t nelem, size_t elsize)
-{
-	struct allocinfo *info;
-	void *volatile ret;
-	assert(nelem && elsize); /* unspecified behaviour otherwise */
-	if (nelem > SIZE_MAX / elsize) {
-		errno = ENOMEM;
-		return NULL;
-	}
-	ret = malloc(nelem * elsize);
-	if (!ret)
-		return NULL;
-	memset(ret, 0, nelem * elsize);
-	info = get_allocinfo(ret);
-	info->zeroed = nelem * elsize;
-	return ret;
-}
-
-
-void *
-realloc(void *ptr, size_t size)
-{
-	struct allocinfo *info;
-	void *volatile ret;
-	size_t n;
-	assert(size); /* unspecified behaviour otherwise */
-	if (!ptr)
-		return malloc(size);
-	ret = malloc(size);
-	if (!ret)
-		return malloc;
-	info = get_allocinfo(ret);
-	n = MIN(size, info->size);
-	info->zeroed = MIN(n, info->zeroed);
-	memcpy(ret, ptr, n);
-	free(ptr);
-	return ret;
-}
-
-
 void *
 memalign(size_t alignment, size_t size)
 {
@@ -156,14 +106,69 @@ memalign(size_t alignment, size_t size)
 	info->zeroed         = 0;
 	info->refcount       = 1;
 
+	just_alloced = ptr;
 	return ptr;
 
 enomem:
+	just_alloced = NULL;
 	errno = ENOMEM;
 	return NULL;
 }
 
 
+void *
+malloc(size_t size)
+{
+	size_t alignment = get_pagesize();
+	while (alignment < sizeof(long long int))
+		alignment *= 2;
+	while (alignment < sizeof(long double))
+		alignment *= 2;
+	return memalign(alignment, size);
+}
+
+
+void *
+calloc(size_t nelem, size_t elsize)
+{
+	struct allocinfo *info;
+	void *volatile ret;
+	assert(nelem && elsize); /* unspecified behaviour otherwise */
+	if (nelem > SIZE_MAX / elsize) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	ret = malloc(nelem * elsize);
+	if (!ret)
+		return NULL;
+	memset(ret, 0, nelem * elsize);
+	info = get_allocinfo(ret);
+	info->zeroed = nelem * elsize;
+	return ret;
+}
+
+
+void *
+realloc(void *ptr, size_t size)
+{
+	struct allocinfo *info;
+	void *volatile ret;
+	size_t n;
+	assert(size); /* unspecified behaviour otherwise */
+	if (!ptr)
+		return malloc(size);
+	ret = malloc(size);
+	if (!ret)
+		return malloc;
+	info = get_allocinfo(ret);
+	n = MIN(size, info->size);
+	info->zeroed = MIN(n, info->zeroed);
+	memcpy(ret, ptr, n);
+	free(ptr);
+	return ret;
+}
+
+
 int
 posix_memalign(void **memptr, size_t alignment, size_t size)
 {
@@ -171,8 +176,9 @@ posix_memalign(void **memptr, size_t alignment, size_t size)
 	void *volatile *volatile ptrp = memptr;
 	assert(!(alignment % sizeof(void *)));
 	assert(ptrp);
+	errno = 0;
 	*memptr = memalign(alignment, size);
-	ret = *memptr ? ENOMEM : 0;
+	ret = errno;
 	errno = saved_errno;
 	return ret;
 }
@@ -237,6 +243,21 @@ free(void *ptr)
 }
 
 
+void *
+memset(void *s, int c, size_t n)
+{
+	char *str = s;
+	struct allocinfo *info;
+	if (just_alloced && s == just_alloced) {
+		info = get_allocinfo(s);
+		info->zeroed = MAX(info->zeroed, n);
+	}
+	while (n--)
+		str[n] = (char)c;
+	return s;
+}
+
+
 void
 exit(int status)
 {
-- 
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