Copy in libbacktrace from gcc

[thirdparty/binutils-gdb.git] / libbacktrace / unknown.c

diff --git a/libbacktrace/unknown.c b/libbacktrace/unknown.c
new file mode 100644 (file)
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--- /dev/null
+++ b/libbacktrace/unknown.c
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+/* unknown.c -- used when backtrace configury does not know file format.
+   Copyright (C) 2012-2021 Free Software Foundation, Inc.
+   Written by Ian Lance Taylor, Google.
+
+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.
+
+    (3) The name of the author may not be used to
+    endorse or promote products derived from this software without
+    specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.  */
+
+#include "config.h"
+
+#include <sys/types.h>
+
+#include "backtrace.h"
+#include "internal.h"
+
+/* A trivial routine that always fails to find fileline data.  */
+
+static int
+unknown_fileline (struct backtrace_state *state ATTRIBUTE_UNUSED,
+                 uintptr_t pc, backtrace_full_callback callback,
+                 backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
+                 void *data)
+
+{
+  return callback (data, pc, NULL, 0, NULL);
+}
+
+/* Initialize the backtrace data when we don't know how to read the
+   debug info.  */
+
+int
+backtrace_initialize (struct backtrace_state *state ATTRIBUTE_UNUSED,
+                     const char *filename ATTRIBUTE_UNUSED,
+                     int descriptor ATTRIBUTE_UNUSED,
+                     backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
+                     void *data ATTRIBUTE_UNUSED, fileline *fileline_fn)
+{
+  state->fileline_data = NULL;
+  *fileline_fn = unknown_fileline;
+  return 1;
+}