2012-10-29 Wei Mi <wmi@google.com>

        * configure.ac: Add libasan to target_libraries
        * Makefile.def: Ditto
        * configure: Regenerate
        * Makefile.in: Regenerate
        * libasan: New directory for asan runtime

gcc:
	2012-10-29  Wei Mi <wmi@google.com>

	* gcc.c (LINK_COMMAND_SPEC): Add -lasan to link command 
	if -fasan is on.

libasan:
	2012-10-29  Wei Mi  <wmi@google.com>

	Initial checkin: migrate asan runtime from llvm.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/asan@192977 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 181 insertions, 0 deletions

diff --git a/libasan/sanitizer_common/sanitizer_common.h b/libasan/sanitizer_common/sanitizer_common.h
new file mode 100644
index 00000000000..cddefd7ea09
--- /dev/null
+++ b/libasan/sanitizer_common/sanitizer_common.h
@@ -0,0 +1,181 @@
+//===-- sanitizer_common.h --------------------------------------*- C++ -*-===//
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is shared between AddressSanitizer and ThreadSanitizer
+// run-time libraries.
+// It declares common functions and classes that are used in both runtimes.
+// Implementation of some functions are provided in sanitizer_common, while
+// others must be defined by run-time library itself.
+//===----------------------------------------------------------------------===//
+#ifndef SANITIZER_COMMON_H
+#define SANITIZER_COMMON_H
+
+#include "sanitizer_internal_defs.h"
+
+namespace __sanitizer {
+
+// Constants.
+const uptr kWordSize = __WORDSIZE / 8;
+const uptr kWordSizeInBits = 8 * kWordSize;
+const uptr kPageSizeBits = 12;
+const uptr kPageSize = 1UL << kPageSizeBits;
+const uptr kCacheLineSize = 64;
+#ifndef _WIN32
+const uptr kMmapGranularity = kPageSize;
+#else
+const uptr kMmapGranularity = 1UL << 16;
+#endif
+
+// Threads
+int GetPid();
+uptr GetTid();
+uptr GetThreadSelf();
+void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top,
+                                uptr *stack_bottom);
+
+// Memory management
+void *MmapOrDie(uptr size, const char *mem_type);
+void UnmapOrDie(void *addr, uptr size);
+void *MmapFixedNoReserve(uptr fixed_addr, uptr size);
+void *Mprotect(uptr fixed_addr, uptr size);
+// Used to check if we can map shadow memory to a fixed location.
+bool MemoryRangeIsAvailable(uptr range_start, uptr range_end);
+
+// Internal allocator
+void *InternalAlloc(uptr size);
+void InternalFree(void *p);
+// Given the pointer p into a valid allocated block,
+// returns a pointer to the beginning of the block.
+void *InternalAllocBlock(void *p);
+
+// InternalScopedBuffer can be used instead of large stack arrays to
+// keep frame size low.
+// FIXME: use InternalAlloc instead of MmapOrDie once
+// InternalAlloc is made libc-free.
+template<typename T>
+class InternalScopedBuffer {
+ public:
+  explicit InternalScopedBuffer(uptr cnt) {
+    cnt_ = cnt;
+    ptr_ = (T*)MmapOrDie(cnt * sizeof(T), "InternalScopedBuffer");
+  }
+  ~InternalScopedBuffer() {
+    UnmapOrDie(ptr_, cnt_ * sizeof(T));
+  }
+  T &operator[](uptr i) { return ptr_[i]; }
+  T *data() { return ptr_; }
+  uptr size() { return cnt_ * sizeof(T); }
+
+ private:
+  T *ptr_;
+  uptr cnt_;
+  // Disallow evil constructors.
+  InternalScopedBuffer(const InternalScopedBuffer&);
+  void operator=(const InternalScopedBuffer&);
+};
+
+// Simple low-level (mmap-based) allocator for internal use. Doesn't have
+// constructor, so all instances of LowLevelAllocator should be
+// linker initialized.
+class LowLevelAllocator {
+ public:
+  // Requires an external lock.
+  void *Allocate(uptr size);
+ private:
+  char *allocated_end_;
+  char *allocated_current_;
+};
+typedef void (*LowLevelAllocateCallback)(uptr ptr, uptr size);
+// Allows to register tool-specific callbacks for LowLevelAllocator.
+// Passing NULL removes the callback.
+void SetLowLevelAllocateCallback(LowLevelAllocateCallback callback);
+
+// IO
+void RawWrite(const char *buffer);
+void Printf(const char *format, ...);
+void Report(const char *format, ...);
+void SetPrintfAndReportCallback(void (*callback)(const char *));
+
+// Opens the file 'file_name" and reads up to 'max_len' bytes.
+// The resulting buffer is mmaped and stored in '*buff'.
+// The size of the mmaped region is stored in '*buff_size',
+// Returns the number of read bytes or 0 if file can not be opened.
+uptr ReadFileToBuffer(const char *file_name, char **buff,
+                      uptr *buff_size, uptr max_len);
+// Maps given file to virtual memory, and returns pointer to it
+// (or NULL if the mapping failes). Stores the size of mmaped region
+// in '*buff_size'.
+void *MapFileToMemory(const char *file_name, uptr *buff_size);
+
+// OS
+void DisableCoreDumper();
+void DumpProcessMap();
+const char *GetEnv(const char *name);
+const char *GetPwd();
+void ReExec();
+bool StackSizeIsUnlimited();
+void SetStackSizeLimitInBytes(uptr limit);
+
+// Other
+void SleepForSeconds(int seconds);
+void SleepForMillis(int millis);
+int Atexit(void (*function)(void));
+void SortArray(uptr *array, uptr size);
+
+// Exit
+void NORETURN Abort();
+void NORETURN Exit(int exitcode);
+void NORETURN Die();
+void NORETURN SANITIZER_INTERFACE_ATTRIBUTE
+CheckFailed(const char *file, int line, const char *cond, u64 v1, u64 v2);
+
+// Specific tools may override behavior of "Die" and "CheckFailed" functions
+// to do tool-specific job.
+void SetDieCallback(void (*callback)(void));
+typedef void (*CheckFailedCallbackType)(const char *, int, const char *,
+                                       u64, u64);
+void SetCheckFailedCallback(CheckFailedCallbackType callback);
+
+// Math
+INLINE bool IsPowerOfTwo(uptr x) {
+  return (x & (x - 1)) == 0;
+}
+INLINE uptr RoundUpTo(uptr size, uptr boundary) {
+  CHECK(IsPowerOfTwo(boundary));
+  return (size + boundary - 1) & ~(boundary - 1);
+}
+// Don't use std::min, std::max or std::swap, to minimize dependency
+// on libstdc++.
+template<class T> T Min(T a, T b) { return a < b ? a : b; }
+template<class T> T Max(T a, T b) { return a > b ? a : b; }
+template<class T> void Swap(T& a, T& b) {
+  T tmp = a;
+  a = b;
+  b = tmp;
+}
+
+// Char handling
+INLINE bool IsSpace(int c) {
+  return (c == ' ') || (c == '\n') || (c == '\t') ||
+         (c == '\f') || (c == '\r') || (c == '\v');
+}
+INLINE bool IsDigit(int c) {
+  return (c >= '0') && (c <= '9');
+}
+INLINE int ToLower(int c) {
+  return (c >= 'A' && c <= 'Z') ? (c + 'a' - 'A') : c;
+}
+
+#if __WORDSIZE == 64
+# define FIRST_32_SECOND_64(a, b) (b)
+#else
+# define FIRST_32_SECOND_64(a, b) (a)
+#endif
+
+}  // namespace __sanitizer
+
+#endif  // SANITIZER_COMMON_H