upload android base code part3

android/bionic/linker/linker_debug.h

@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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 _LINKER_DEBUG_H_
+#define _LINKER_DEBUG_H_
+
+// You can increase the verbosity of debug traces by defining the LD_DEBUG
+// environment variable to a numeric value from 0 to 2 (corresponding to
+// INFO, TRACE, and DEBUG calls in the source). This will only
+// affect new processes being launched.
+
+// By default, traces are sent to logcat, with the "linker" tag. You can
+// change this to go to stdout instead by setting the definition of
+// LINKER_DEBUG_TO_LOG to 0.
+#define LINKER_DEBUG_TO_LOG  1
+
+#define TRACE_DEBUG          1
+#define DO_TRACE_LOOKUP      1
+#define DO_TRACE_RELO        1
+#define DO_TRACE_IFUNC       1
+#define TIMING               0
+#define STATS                0
+#define COUNT_PAGES          0
+
+/*********************************************************************
+ * You shouldn't need to modify anything below unless you are adding
+ * more debugging information.
+ *
+ * To enable/disable specific debug options, change the defines above
+ *********************************************************************/
+
+#include <unistd.h>
+
+#include <async_safe/log.h>
+
+__LIBC_HIDDEN__ extern int g_ld_debug_verbosity;
+
+#if LINKER_DEBUG_TO_LOG
+#define _PRINTVF(v, x...) \
+    do { \
+      if (g_ld_debug_verbosity > (v)) async_safe_format_log(5-(v), "linker", x); \
+    } while (0)
+#else /* !LINKER_DEBUG_TO_LOG */
+#define _PRINTVF(v, x...) \
+    do { \
+      if (g_ld_debug_verbosity > (v)) { async_safe_format_fd(1, x); write(1, "\n", 1); } \
+    } while (0)
+#endif /* !LINKER_DEBUG_TO_LOG */
+
+#define PRINT(x...)          _PRINTVF(-1, x)
+#define INFO(x...)           _PRINTVF(0, x)
+#define TRACE(x...)          _PRINTVF(1, x)
+
+#if TRACE_DEBUG
+#define DEBUG(x...)          _PRINTVF(2, "DEBUG: " x)
+#else /* !TRACE_DEBUG */
+#define DEBUG(x...)          do {} while (0)
+#endif /* TRACE_DEBUG */
+
+#define TRACE_TYPE(t, x...)   do { if (DO_TRACE_##t) { TRACE(x); } } while (0)
+
+#if COUNT_PAGES
+extern uint32_t bitmask[];
+#if defined(__LP64__)
+#define MARK(offset) \
+    do { \
+      if ((((offset) >> 12) >> 5) < 4096) \
+          bitmask[((offset) >> 12) >> 5] |= (1 << (((offset) >> 12) & 31)); \
+    } while (0)
+#else
+#define MARK(offset) \
+    do { \
+      bitmask[((offset) >> 12) >> 3] |= (1 << (((offset) >> 12) & 7)); \
+    } while (0)
+#endif
+#else
+#define MARK(x) do {} while (0)
+
+#endif
+
+#endif /* _LINKER_DEBUG_H_ */