From: W. Felix Handte <w@felixhandte.com>
Date: Mon, 16 Sep 2019 23:04:05 +0000 (-0400)
Subject: Declare the ASAN Functions We Need, Don't Include the Header
X-Git-Tag: v1.4.4~1^2~24^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b6987acbbf1d565feac9473eb095eebade7f6f1d;p=thirdparty%2Fzstd.git

Declare the ASAN Functions We Need, Don't Include the Header
---

diff --git a/lib/common/mem.h b/lib/common/mem.h
index 983b55edc..530d30c8f 100644
--- a/lib/common/mem.h
+++ b/lib/common/mem.h
@@ -84,7 +84,40 @@ intptr_t __msan_test_shadow(const volatile void *x, size_t size);
 #endif
 
 #if defined (ADDRESS_SANITIZER)
-#  include <sanitizer/asan_interface.h>
+/* Not all platforms that support asan provide sanitizers/asan_interface.h.
+ * We therefore declare the functions we need ourselves, rather than trying to
+ * include the header file... */
+
+/**
+ * Marks a memory region (<c>[addr, addr+size)</c>) as unaddressable.
+ *
+ * This memory must be previously allocated by your program. Instrumented
+ * code is forbidden from accessing addresses in this region until it is
+ * unpoisoned. This function is not guaranteed to poison the entire region -
+ * it could poison only a subregion of <c>[addr, addr+size)</c> due to ASan
+ * alignment restrictions.
+ *
+ * \note This function is not thread-safe because no two threads can poison or
+ * unpoison memory in the same memory region simultaneously.
+ *
+ * \param addr Start of memory region.
+ * \param size Size of memory region. */
+void __asan_poison_memory_region(void const volatile *addr, size_t size);
+
+/**
+ * Marks a memory region (<c>[addr, addr+size)</c>) as addressable.
+ *
+ * This memory must be previously allocated by your program. Accessing
+ * addresses in this region is allowed until this region is poisoned again.
+ * This function could unpoison a super-region of <c>[addr, addr+size)</c> due
+ * to ASan alignment restrictions.
+ *
+ * \note This function is not thread-safe because no two threads can
+ * poison or unpoison memory in the same memory region simultaneously.
+ *
+ * \param addr Start of memory region.
+ * \param size Size of memory region. */
+void __asan_unpoison_memory_region(void const volatile *addr, size_t size);
 #endif