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+/*******************************************************************************
+Copyright (c) 2019-2020, Andrea Fioraldi
+
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*******************************************************************************/
+
+#ifndef __LIBQASAN_H__
+#define __LIBQASAN_H__
+
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <signal.h>
+#include <ucontext.h>
+#include <inttypes.h>
+#include <dlfcn.h>
+#include <wchar.h>
+
+#include "qasan.h"
+
+#define QASAN_LOG(msg...)                   \
+  do {                                      \
+                                            \
+    if (__qasan_log) {                      \
+                                            \
+      fprintf(stderr, "==%d== ", getpid()); \
+      fprintf(stderr, msg);                 \
+                                            \
+    }                                       \
+                                            \
+  } while (0)
+
+#ifdef DEBUG
+#define QASAN_DEBUG(msg...)                 \
+  do {                                      \
+                                            \
+    if (__qasan_debug) {                    \
+                                            \
+      fprintf(stderr, "==%d== ", getpid()); \
+      fprintf(stderr, msg);                 \
+                                            \
+    }                                       \
+                                            \
+  } while (0)
+#else
+#define QASAN_DEBUG(msg...) \
+  do {                      \
+                            \
+  } while (0)
+#endif
+
+#define ASSERT_DLSYM(name)                                              \
+  ({                                                                    \
+                                                                        \
+    void* a = (void*)dlsym(RTLD_NEXT, #name);                           \
+    if (!a) {                                                           \
+                                                                        \
+      fprintf(stderr,                                                   \
+              "FATAL ERROR: failed dlsym of " #name " in libqasan!\n"); \
+      abort();                                                          \
+                                                                        \
+    }                                                                   \
+    a;                                                                  \
+                                                                        \
+  })
+
+extern int __qasan_debug;
+extern int __qasan_log;
+
+void __libqasan_init_hooks(void);
+void __libqasan_init_malloc(void);
+
+void __libqasan_hotpatch(void);
+
+size_t __libqasan_malloc_usable_size(void* ptr);
+void*  __libqasan_malloc(size_t size);
+void   __libqasan_free(void* ptr);
+void*  __libqasan_calloc(size_t nmemb, size_t size);
+void*  __libqasan_realloc(void* ptr, size_t size);
+int    __libqasan_posix_memalign(void** ptr, size_t align, size_t len);
+void*  __libqasan_memalign(size_t align, size_t len);
+void*  __libqasan_aligned_alloc(size_t align, size_t len);
+
+void*    __libqasan_memcpy(void* dest, const void* src, size_t n);
+void*    __libqasan_memmove(void* dest, const void* src, size_t n);
+void*    __libqasan_memset(void* s, int c, size_t n);
+void*    __libqasan_memchr(const void* s, int c, size_t n);
+void*    __libqasan_memrchr(const void* s, int c, size_t n);
+size_t   __libqasan_strlen(const char* s);
+size_t   __libqasan_strnlen(const char* s, size_t len);
+int      __libqasan_strcmp(const char* str1, const char* str2);
+int      __libqasan_strncmp(const char* str1, const char* str2, size_t len);
+int      __libqasan_strcasecmp(const char* str1, const char* str2);
+int      __libqasan_strncasecmp(const char* str1, const char* str2, size_t len);
+int      __libqasan_memcmp(const void* mem1, const void* mem2, size_t len);
+int      __libqasan_bcmp(const void* mem1, const void* mem2, size_t len);
+char*    __libqasan_strstr(const char* haystack, const char* needle);
+char*    __libqasan_strcasestr(const char* haystack, const char* needle);
+void*    __libqasan_memmem(const void* haystack, size_t haystack_len,
+                           const void* needle, size_t needle_len);
+char*    __libqasan_strchr(const char* s, int c);
+char*    __libqasan_strrchr(const char* s, int c);
+size_t   __libqasan_wcslen(const wchar_t* s);
+wchar_t* __libqasan_wcscpy(wchar_t* d, const wchar_t* s);
+int      __libqasan_wcscmp(const wchar_t* s1, const wchar_t* s2);
+
+#endif
+