From 40dfb28b56fe55a370a35495e0f1eb6c95110f35 Mon Sep 17 00:00:00 2001 From: Aaron Merey Date: Thu, 9 Feb 2023 20:28:20 -0500 Subject: [PATCH] Move implementation of perror_with_name to gdbsupport gdbsupport/errors.h declares perror_with_name and leaves the implementation to the clients. However gdb and gdbserver's implementations are essentially the same, resulting in unnecessary code duplication. Fix this by implementing perror_with_name in gdbsupport. Add an optional parameter for specifying the errno used to generate the error message. Also move the implementation of perror_string to gdbsupport since perror_with_name requires it. Approved-By: Tom Tromey --- gdb/utils.c | 36 ------------------------------------ gdbserver/utils.cc | 22 ---------------------- gdbsupport/errors.cc | 24 ++++++++++++++++++++++++ gdbsupport/errors.h | 13 ++++++++++--- 4 files changed, 34 insertions(+), 61 deletions(-) diff --git a/gdb/utils.c b/gdb/utils.c index 95adbe58e4a..d763e91d7e1 100644 --- a/gdb/utils.c +++ b/gdb/utils.c @@ -614,42 +614,6 @@ add_internal_problem_command (struct internal_problem *problem) } } -/* Return a newly allocated string, containing the PREFIX followed - by the system error message for errno (separated by a colon). */ - -static std::string -perror_string (const char *prefix) -{ - const char *err = safe_strerror (errno); - return std::string (prefix) + ": " + err; -} - -/* Print the system error message for errno, and also mention STRING - as the file name for which the error was encountered. Use ERRCODE - for the thrown exception. Then return to command level. */ - -static void ATTRIBUTE_NORETURN -throw_perror_with_name (enum errors errcode, const char *string) -{ - std::string combined = perror_string (string); - - /* I understand setting these is a matter of taste. Still, some people - may clear errno but not know about bfd_error. Doing this here is not - unreasonable. */ - bfd_set_error (bfd_error_no_error); - errno = 0; - - throw_error (errcode, _("%s."), combined.c_str ()); -} - -/* 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. */ diff --git a/gdbserver/utils.cc b/gdbserver/utils.cc index a6f5bd7b600..511364cfed2 100644 --- a/gdbserver/utils.cc +++ b/gdbserver/utils.cc @@ -51,28 +51,6 @@ malloc_failure (long size) abort_or_exit (); } -/* Print the system error message for errno, and also mention STRING - as the file name for which the error was encountered. - Then return to command level. */ - -void -perror_with_name (const char *string) -{ - const char *err; - char *combined; - - err = safe_strerror (errno); - if (err == NULL) - err = "unknown error"; - - combined = (char *) alloca (strlen (err) + strlen (string) + 3); - strcpy (combined, string); - strcat (combined, ": "); - strcat (combined, err); - - error ("%s.", combined); -} - /* Print an error message and return to top level. */ void diff --git a/gdbsupport/errors.cc b/gdbsupport/errors.cc index 566be377e3f..b48ce10eef8 100644 --- a/gdbsupport/errors.cc +++ b/gdbsupport/errors.cc @@ -71,6 +71,30 @@ internal_warning_loc (const char *file, int line, const char *fmt, ...) va_end (ap); } +/* See errors.h. */ + +std::string +perror_string (const char *prefix, int errnum) +{ + const char *err; + + if (errnum != 0) + err = safe_strerror (errnum); + else + err = safe_strerror (errno); + return std::string (prefix) + ": " + err; +} + +/* See errors.h. */ + +void +perror_with_name (const char *string, int errnum) +{ + std::string combined = perror_string (string, errnum); + + error (_("%s."), combined.c_str ()); +} + #if defined (USE_WIN32API) || defined(__CYGWIN__) /* See errors.h. */ diff --git a/gdbsupport/errors.h b/gdbsupport/errors.h index 2304bc1e3d1..20f9152b671 100644 --- a/gdbsupport/errors.h +++ b/gdbsupport/errors.h @@ -83,11 +83,18 @@ extern void internal_vwarning (const char *file, int line, ATTRIBUTE_PRINTF (3, 0); +/* Return a newly allocated string, containing the PREFIX followed + by the system error message for errno (separated by a colon). + If ERRNUM is given, then use it in place of errno. */ + +extern std::string perror_string (const char *prefix, int errnum = 0); + /* 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. If ERRNUM is given, + then use it in place of errno. This function does not return. */ -extern void perror_with_name (const char *string) ATTRIBUTE_NORETURN; +extern void perror_with_name (const char *string, int errnum = 0) + ATTRIBUTE_NORETURN; /* Call this function to handle memory allocation failures. This function does not return. This function must be provided by the -- 2.30.2