+2009-06-24 Maxim Kuvyrkov <maxim@codesourcery.com>
+ Mark Mitchell <mark@codesourcery.com>
+ Joseph Myers <joseph@codesourcery.com>
+ Kazu Hirata <kazu@codesourcery.com>
+
+ * sysdeps/arm/eabi/backtrace.c: New.
+ * sysdeps/arm/eabi/Makefile (CFLAGS-backtrace.c): Add
+ -funwind-tables.
+ * sysdeps/arm/preconfigure: Add -fno-unwind-tables to CFLAGS.
+ * sysdeps/unix/sysv/linux/arm/eabi/configure.in: Remove
+ -fno-unwind-tables from CFLAGS.
+ * sysdeps/unix/sysv/linux/arm/eabi/configure: Regenerate.
+ * sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h (_Unwind_Trace_Fn):
+ Define.
+ (_Unwind_Backtrace): Declare.
+
2009-05-18 Joseph Myers <joseph@codesourcery.com>
* sysdeps/arm/____longjmp_chk.S (CHECK_SP): Use unsigned
--- /dev/null
+/* Return backtrace of current program state.
+ Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Kazu Hirata <kazu@codesourcery.com>, 2008.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <bits/libc-lock.h>
+#include <dlfcn.h>
+#include <execinfo.h>
+#include <stdlib.h>
+#include <unwind.h>
+
+struct trace_arg
+{
+ void **array;
+ int cnt, size;
+};
+
+#ifdef SHARED
+static _Unwind_Reason_Code (*unwind_backtrace) (_Unwind_Trace_Fn, void *);
+static _Unwind_VRS_Result (*unwind_vrs_get) (_Unwind_Context *,
+ _Unwind_VRS_RegClass,
+ _uw,
+ _Unwind_VRS_DataRepresentation,
+ void *);
+
+static void *libgcc_handle;
+
+static void
+init (void)
+{
+ libgcc_handle = __libc_dlopen ("libgcc_s.so.1");
+
+ if (libgcc_handle == NULL)
+ return;
+
+ unwind_backtrace = __libc_dlsym (libgcc_handle, "_Unwind_Backtrace");
+ unwind_vrs_get = __libc_dlsym (libgcc_handle, "_Unwind_VRS_Get");
+ if (unwind_vrs_get == NULL)
+ unwind_backtrace = NULL;
+}
+
+/* This function is identical to "_Unwind_GetGR", except that it uses
+ "unwind_vrs_get" instead of "_Unwind_VRS_Get". */
+static inline _Unwind_Word
+unwind_getgr (_Unwind_Context *context, int regno)
+{
+ _uw val;
+ unwind_vrs_get (context, _UVRSC_CORE, regno, _UVRSD_UINT32, &val);
+ return val;
+}
+
+/* This macro is identical to the _Unwind_GetIP macro, except that it
+ uses "unwind_getgr" instead of "_Unwind_GetGR". */
+# define unwind_getip(context) \
+ (unwind_getgr (context, 15) & ~(_Unwind_Word)1)
+#else
+# define unwind_backtrace _Unwind_Backtrace
+# define unwind_getip _Unwind_GetIP
+#endif
+
+static _Unwind_Reason_Code
+backtrace_helper (struct _Unwind_Context *ctx, void *a)
+{
+ struct trace_arg *arg = a;
+
+ /* We are first called with address in the __backtrace function.
+ Skip it. */
+ if (arg->cnt != -1)
+ arg->array[arg->cnt] = (void *) unwind_getip (ctx);
+ if (++arg->cnt == arg->size)
+ return _URC_END_OF_STACK;
+ return _URC_NO_REASON;
+}
+
+int
+__backtrace (array, size)
+ void **array;
+ int size;
+{
+ struct trace_arg arg = { .array = array, .size = size, .cnt = -1 };
+#ifdef SHARED
+ __libc_once_define (static, once);
+
+ __libc_once (once, init);
+ if (unwind_backtrace == NULL)
+ return 0;
+#endif
+
+ if (size >= 1)
+ unwind_backtrace (backtrace_helper, &arg);
+
+ if (arg.cnt > 1 && arg.array[arg.cnt - 1] == NULL)
+ --arg.cnt;
+ return arg.cnt != -1 ? arg.cnt : 0;
+}
+weak_alias (__backtrace, backtrace)
+libc_hidden_def (__backtrace)
+
+
+#ifdef SHARED
+/* Free all resources if necessary. */
+libc_freeres_fn (free_mem)
+{
+ unwind_backtrace = NULL;
+ if (libgcc_handle != NULL)
+ {
+ __libc_dlclose (libgcc_handle);
+ libgcc_handle = NULL;
+ }
+}
+#endif
/* Header file for the ARM EABI unwinder
- Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005, 2009 Free Software Foundation, Inc.
Contributed by Paul Brook
This file is free software; you can redistribute it and/or modify it
#define _Unwind_SetIP(context, val) \
_Unwind_SetGR (context, 15, val | (_Unwind_GetGR (context, 15) & 1))
+typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)
+ (struct _Unwind_Context *, void *);
+
+extern _Unwind_Reason_Code _Unwind_Backtrace (_Unwind_Trace_Fn, void *);
+
#ifdef __cplusplus
} /* extern "C" */
#endif
projects / platform / upstream / linaro-glibc.git / commitdiff