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-rw-r--r--sysdeps/generic/backtrace.c34
-rw-r--r--sysdeps/generic/backtracesyms.c58
-rw-r--r--sysdeps/generic/elf/backtracesyms.c88
-rw-r--r--sysdeps/i386/backtrace.c63
4 files changed, 243 insertions, 0 deletions
diff --git a/sysdeps/generic/backtrace.c b/sysdeps/generic/backtrace.c
new file mode 100644
index 0000000000..26bf9d41cf
--- /dev/null
+++ b/sysdeps/generic/backtrace.c
@@ -0,0 +1,34 @@
+/* Return backtrace of current program state.
+ Copyright (C) 1998 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <execinfo.h>
+
+
+int
+__backtrace (array, size)
+ void **array;
+ int size;
+{
+ /* We don't generally have the possibility to determine the stack
+ trace. Even gcc's `__builtin_return_address' feature cannot help
+ since it requires a constant argument. */
+ return 0;
+}
+weak_alias (__backtrace, backtrace)
diff --git a/sysdeps/generic/backtracesyms.c b/sysdeps/generic/backtracesyms.c
new file mode 100644
index 0000000000..36bd39caaf
--- /dev/null
+++ b/sysdeps/generic/backtracesyms.c
@@ -0,0 +1,58 @@
+/* Return list with names for address in backtrace.
+ Copyright (C) 1998 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <execinfo.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/* Assume the worst for the width of an address. */
+#define WORD_WIDTH 16
+
+
+char **
+__backtrace_symbols (array, size)
+ const void **array;
+ int size;
+{
+ int cnt;
+ size_t total = 0;
+ const char **result;
+
+ /* We can compute the text size needed for the symbols since we print
+ them all as "[%<addr>]". */
+ total = size * (WORD_WIDTH + 3);
+
+ /* Allocate memory for the result. */
+ result = malloc (size * sizeof (char *) + total);
+ if (result != NULL)
+ {
+ char *last = (char *) (result + size);
+
+ for (cnt = 0; cnt < size; ++cnt)
+ {
+ result[cnt] = last;
+ last += 1 + sprintf (last, "[+%p]", array[cnt]);
+ }
+ }
+
+ return result;
+}
+weak_alias (__backtrace_symbols, backtrace_symbols)
diff --git a/sysdeps/generic/elf/backtracesyms.c b/sysdeps/generic/elf/backtracesyms.c
new file mode 100644
index 0000000000..11a65ea267
--- /dev/null
+++ b/sysdeps/generic/elf/backtracesyms.c
@@ -0,0 +1,88 @@
+/* Return list with names for address in backtrace.
+ Copyright (C) 1998 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <execinfo.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <elf/ldsodefs.h>
+
+#if __ELF_NATIVE_CLASS == 32
+# define WORD_WIDTH 8
+#else
+/* We assyme 64bits. */
+# define WORD_WIDTH 16
+#endif
+
+
+char **
+__backtrace_symbols (array, size)
+ const void **array;
+ int size;
+{
+ Dl_info info[size];
+ int status[size];
+ int cnt;
+ size_t total = 0;
+ char **result;
+
+ /* Fill in the information we can get from `dladdr'. */
+ for (cnt = 0; cnt < size; ++cnt)
+ {
+ status[cnt] = _dl_addr (array[cnt], &info[cnt]);
+ if (status[cnt] && info[cnt].dli_fname && info[cnt].dli_fname[0] != '\0')
+ /* We have some info, compute the length of the string which will be
+ "<fct-name>(<sym-name>)[+offset]. */
+ total += (strlen (info[cnt].dli_fname ?: "")
+ + (info[cnt].dli_sname
+ ? strlen (info[cnt].dli_sname) + 2
+ : 0)
+ + WORD_WIDTH + 6);
+ else
+ total += 6 + WORD_WIDTH;
+ }
+
+ /* Allocate memory for the result. */
+ result = malloc (size * sizeof (char *) + total);
+ if (result != NULL)
+ {
+ char *last = (char *) (result + size);
+
+ for (cnt = 0; cnt < size; ++cnt)
+ {
+ result[cnt] = last;
+
+ if (status[cnt] && info[cnt].dli_fname
+ && info[cnt].dli_fname[0] != '\0')
+ last += 1 + sprintf (last, "%s%s%s%s[+%p]",
+ info[cnt].dli_fname ?: "",
+ info[cnt].dli_sname ? "(" : "",
+ info[cnt].dli_sname ?: "",
+ info[cnt].dli_sname ? ") " : " ",
+ info[cnt].dli_fbase);
+ else
+ last += 1 + sprintf (last, "[+%p]", array[cnt]);
+ }
+ }
+
+ return result;
+}
+weak_alias (__backtrace_symbols, backtrace_symbols)
diff --git a/sysdeps/i386/backtrace.c b/sysdeps/i386/backtrace.c
new file mode 100644
index 0000000000..0d484c7723
--- /dev/null
+++ b/sysdeps/i386/backtrace.c
@@ -0,0 +1,63 @@
+/* Return backtrace of current program state.
+ Copyright (C) 1998 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <execinfo.h>
+
+
+/* This is the stack alyout we see with every stack frame.
+
+ +-----------------+ +-----------------+
+ %ebp -> | %ebp last frame--------> | %ebp last frame--->...
+ | | | |
+ | return address | | return address |
+ +-----------------+ +-----------------+
+*/
+struct layout
+{
+ struct layout *next;
+ void *return_address;
+};
+
+int
+__backtrace (array, size)
+ void **array;
+ int size;
+{
+ /* We assume that all the code is generated with frame pointers set. */
+ register void *ebp __asm__ ("ebp");
+ struct layout *current;
+ int cnt = 0;
+
+ /* We skip the call to this function, it makes no sense to record it. */
+ current = (struct layout *) ebp;
+ while (cnt < size)
+ {
+ if (current == NULL)
+ /* This means the toplevel is reached. */
+ break;
+
+ array[cnt++] = current->return_address;
+
+ current = current->next;
+ }
+
+ return cnt;
+}
+weak_alias (__backtrace, backtrace)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 03:10:41 +0000