[PATCH 1/6] Move throw_perror_with_name to common/

[Pedro Alves <palves@redhat.com>]

I have a use for throw_perror_with_name in nat/, but currently, only
perror_with_name is available to common gdb+gdbserver code.  This
patch makes throw_perror_with_name the function that client need to
implement (instead of perror_with_name), and adds a common
perror_with_name as a wrapper over throw_perror_with_name, just like
GDB's is currently.

gdb/ChangeLog:
2015-03-06  Pedro Alves  <palves@redhat.com>

	* utils.c (perror_with_name): Move ...
	* common/errors.c (perror_with_name): ... here.
	* common/errors.h: Include common-exceptions.h.
	(throw_perror_with_name): Declare.
	(perror_with_name): Update comment.

gdb/gdbserver/ChangeLog:
2015-03-06  Pedro Alves  <palves@redhat.com>

	* utils.c (perror_with_name): Rename to ...
	(throw_perror_with_name): ... this.  Use throw_error in gdbserver.
---
 gdb/common/errors.c   |  8 ++++++++
 gdb/common/errors.h   | 13 +++++++++++--
 gdb/gdbserver/utils.c |  6 +++++-
 gdb/utils.c           |  8 --------
 4 files changed, 24 insertions(+), 11 deletions(-)

diff --git a/gdb/common/errors.c b/gdb/common/errors.c
index 00b325e..5fd4a80 100644
--- a/gdb/common/errors.c
+++ b/gdb/common/errors.c
@@ -67,3 +67,11 @@ internal_warning (const char *file, int line, const char *fmt, ...)
   internal_vwarning (file, line, fmt, ap);
   va_end (ap);
 }
+
+/* See common/errors.h.  */
+
+void
+perror_with_name (const char *string)
+{
+  throw_perror_with_name (GENERIC_ERROR, string);
+}
diff --git a/gdb/common/errors.h b/gdb/common/errors.h
index 36e2c49..c7d85f1 100644
--- a/gdb/common/errors.h
+++ b/gdb/common/errors.h
@@ -20,6 +20,8 @@
 #ifndef COMMON_ERRORS_H
 #define COMMON_ERRORS_H
 
+#include "common-exceptions.h"
+
 /* A problem was detected, but the requested operation can still
    proceed.  A warning message is constructed using a printf- or
    vprintf-style argument list.  The function "vwarning" must be
@@ -76,8 +78,15 @@ extern void internal_vwarning (const char *file, int line,
 \f
 
 /* Like "error", but the error message is constructed by combining
-   STRING with the system error message for errno.  This function does
-   not return.  This function must be provided by the client.  */
+   STRING with the system error message for errno.  Uses ERRCODE for
+   the thrown exception.  This function does not return.  This
+   function must be provided by the client.  */
+
+extern void throw_perror_with_name (enum errors errcode, const char *string)
+  ATTRIBUTE_NORETURN;
+
+/* Convenience wrapper for "throw_perror_with_name" that throws
+   GENERIC_ERROR.  */
 
 extern void perror_with_name (const char *string) ATTRIBUTE_NORETURN;
 
diff --git a/gdb/gdbserver/utils.c b/gdb/gdbserver/utils.c
index e89a862..cd5734b 100644
--- a/gdb/gdbserver/utils.c
+++ b/gdb/gdbserver/utils.c
@@ -54,7 +54,7 @@ xstrdup (const char *s)
    Then return to command level.  */
 
 void
-perror_with_name (const char *string)
+throw_perror_with_name (enum errors errcode, const char *string)
 {
   const char *err;
   char *combined;
@@ -68,7 +68,11 @@ perror_with_name (const char *string)
   strcat (combined, ": ");
   strcat (combined, err);
 
+#ifdef IN_PROCESS_AGENT
   error ("%s.", combined);
+#else
+  throw_error (errcode, "%s.", combined);
+#endif
 }
 
 /* Print an error message and return to top level.  */
diff --git a/gdb/utils.c b/gdb/utils.c
index 7172bba..6b1aa89 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -990,14 +990,6 @@ throw_perror_with_name (enum errors errcode, const char *string)
   throw_error (errcode, _("%s."), combined);
 }
 
-/* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR.  */
-
-void
-perror_with_name (const char *string)
-{
-  throw_perror_with_name (GENERIC_ERROR, string);
-}
-
 /* Same as perror_with_name except that it prints a warning instead
    of throwing an error.  */
 
-- 
1.9.3