From 38bcc89d48a20af944fe0d51eff3980f7dc8a88e Mon Sep 17 00:00:00 2001 From: Simon Marchi Date: Mon, 15 Dec 2014 11:38:03 -0500 Subject: [PATCH] Fix build with Python 3.4 (PR python/16784) The type of the function pointer PyOS_ReadlineFunctionPointer (part of the Python C API), which we use, slightly changed starting with Python 3.4. The signature went from PyAPI_DATA(char) *(*PyOS_ReadlineFunctionPointer)(FILE *, FILE *, char *); to PyAPI_DATA(char) *(*PyOS_ReadlineFunctionPointer)(FILE *, FILE *, const char *); The parameter that changed is the prompt text. This commits adjust gdb accordingly by making the prompt_arg parameter const, as well as the fallouts of that. I needed to rework how annotations are added to the prompt, since the it is now const. If annotations are enabled, it will make a copy of the prompt overwrite the prompt variable that is used throughout the function. Otherwise, no copy is done and the original prompt_arg value is passed. I changed the signature of deprecated_readline_hook. I would've changed any user of it, but it seems like nothing is using it, Built-tested with python 2.7.x, 3.3.y and 3.4.z. gdb/ChangeLog: * defs.h (gdb_readline): Constify argument. (gdb_readline_wrapper): Same. (command_line_input): Same. (deprecated_readline_hook): Same. * top.c (deprecated_readline_hook): Same. (gdb_readline): Same. (gdb_readline_wrapper): Same. (command_line_input): Constify argument. Pass prompt to called functions instead of local_prompt, overwriting prompt if using annotations. * event-top.h (display_gdb_prompt): Constify argument. * event-top.c (display_gdb_prompt): Same. * python/py-gdb-readline.c (gdbpy_readline_wrapper): Constify argument if building with Python 3.4 and up. Signed-off-by: Simon Marchi --- gdb/ChangeLog | 16 ++++++++++++++++ gdb/defs.h | 8 ++++---- gdb/event-top.c | 2 +- gdb/event-top.h | 2 +- gdb/python/py-gdb-readline.c | 4 ++++ gdb/top.c | 30 +++++++++++++++++------------- 6 files changed, 43 insertions(+), 19 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index b7ea3a690f..2e13df5878 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,19 @@ +2014-12-15 Simon Marchi + + * defs.h (gdb_readline): Constify argument. + (gdb_readline_wrapper): Same. + (command_line_input): Same. + (deprecated_readline_hook): Same. + * top.c (deprecated_readline_hook): Same. + (gdb_readline): Same. + (gdb_readline_wrapper): Same. + (command_line_input): Constify argument. Pass prompt_arg to called + functions instead of local_prompt, overwriting prompt_arg if necessary. + * event-top.h (display_gdb_prompt): Constify argument. + * event-top.c (display_gdb_prompt): Same. + * python/py-gdb-readline.c (gdbpy_readline_wrapper): Constify argument + if building with Python 3.4 and up. + 2014-12-15 Simon Marchi * python/lib/gdb/prompt.py (_prompt_pwd): Use os.getcwd() instead of diff --git a/gdb/defs.h b/gdb/defs.h index 7920938d18..7b5bc0628a 100644 --- a/gdb/defs.h +++ b/gdb/defs.h @@ -277,11 +277,11 @@ extern void print_transfer_performance (struct ui_file *stream, typedef void initialize_file_ftype (void); -extern char *gdb_readline (char *); +extern char *gdb_readline (const char *); -extern char *gdb_readline_wrapper (char *); +extern char *gdb_readline_wrapper (const char *); -extern char *command_line_input (char *, int, char *); +extern char *command_line_input (const char *, int, char *); extern void print_prompt (void); @@ -664,7 +664,7 @@ extern void (*deprecated_warning_hook) (const char *, va_list) extern void (*deprecated_interactive_hook) (void); extern void (*deprecated_readline_begin_hook) (char *, ...) ATTRIBUTE_FPTR_PRINTF_1; -extern char *(*deprecated_readline_hook) (char *); +extern char *(*deprecated_readline_hook) (const char *); extern void (*deprecated_readline_end_hook) (void); extern void (*deprecated_register_changed_hook) (int regno); extern void (*deprecated_context_hook) (int); diff --git a/gdb/event-top.c b/gdb/event-top.c index cb438acfcb..55caf72705 100644 --- a/gdb/event-top.c +++ b/gdb/event-top.c @@ -288,7 +288,7 @@ gdb_rl_callback_handler_reinstall (void) 3. On prompting for pagination. */ void -display_gdb_prompt (char *new_prompt) +display_gdb_prompt (const char *new_prompt) { char *actual_gdb_prompt = NULL; struct cleanup *old_chain; diff --git a/gdb/event-top.h b/gdb/event-top.h index 919287e6f3..0c8baae278 100644 --- a/gdb/event-top.h +++ b/gdb/event-top.h @@ -27,7 +27,7 @@ struct cmd_list_element; /* Exported functions from event-top.c. FIXME: these should really go into top.h. */ -extern void display_gdb_prompt (char *new_prompt); +extern void display_gdb_prompt (const char *new_prompt); void gdb_setup_readline (void); void gdb_disable_readline (void); extern void async_init_signals (void); diff --git a/gdb/python/py-gdb-readline.c b/gdb/python/py-gdb-readline.c index d98a19651c..ab419bce15 100644 --- a/gdb/python/py-gdb-readline.c +++ b/gdb/python/py-gdb-readline.c @@ -29,7 +29,11 @@ static char * gdbpy_readline_wrapper (FILE *sys_stdin, FILE *sys_stdout, +#if PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 4 + const char *prompt) +#else char *prompt) +#endif { int n; char *p = NULL, *q; diff --git a/gdb/top.c b/gdb/top.c index 83d858adcf..7f385628b8 100644 --- a/gdb/top.c +++ b/gdb/top.c @@ -215,7 +215,7 @@ void (*deprecated_warning_hook) (const char *, va_list); window and it can close it. */ void (*deprecated_readline_begin_hook) (char *, ...); -char *(*deprecated_readline_hook) (char *); +char *(*deprecated_readline_hook) (const char *); void (*deprecated_readline_end_hook) (void); /* Called as appropriate to notify the interface that we have attached @@ -620,7 +620,7 @@ prevent_dont_repeat (void) A NULL return means end of file. */ char * -gdb_readline (char *prompt_arg) +gdb_readline (const char *prompt_arg) { int c; char *result; @@ -812,7 +812,7 @@ gdb_readline_wrapper_cleanup (void *arg) } char * -gdb_readline_wrapper (char *prompt) +gdb_readline_wrapper (const char *prompt) { struct cleanup *back_to; struct gdb_readline_wrapper_cleanup *cleanup; @@ -912,14 +912,14 @@ gdb_rl_operate_and_get_next (int count, int key) simple input as the user has requested. */ char * -command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) +command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix) { static char *linebuffer = 0; static unsigned linelength = 0; + const char *prompt = prompt_arg; char *p; char *p1; char *rl; - char *local_prompt = prompt_arg; char *nline; char got_eof = 0; @@ -929,15 +929,19 @@ command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) if (annotation_level > 1 && instream == stdin) { - local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) + char *local_prompt; + + local_prompt = alloca ((prompt == NULL ? 0 : strlen (prompt)) + strlen (annotation_suffix) + 40); - if (prompt_arg == NULL) + if (prompt == NULL) local_prompt[0] = '\0'; else - strcpy (local_prompt, prompt_arg); + strcpy (local_prompt, prompt); strcat (local_prompt, "\n\032\032"); strcat (local_prompt, annotation_suffix); strcat (local_prompt, "\n"); + + prompt = local_prompt; } if (linebuffer == 0) @@ -979,15 +983,15 @@ command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) /* Don't use fancy stuff if not talking to stdin. */ if (deprecated_readline_hook && input_from_terminal_p ()) { - rl = (*deprecated_readline_hook) (local_prompt); + rl = (*deprecated_readline_hook) (prompt); } else if (command_editing_p && input_from_terminal_p ()) { - rl = gdb_readline_wrapper (local_prompt); + rl = gdb_readline_wrapper (prompt); } else { - rl = gdb_readline (local_prompt); + rl = gdb_readline (prompt); } if (annotation_level > 1 && instream == stdin) @@ -1021,7 +1025,7 @@ command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) break; p--; /* Put on top of '\'. */ - local_prompt = (char *) 0; + prompt = NULL; } #ifdef STOP_SIGNAL @@ -1064,7 +1068,7 @@ command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) if (expanded < 0) { xfree (history_value); - return command_line_input (prompt_arg, repeat, + return command_line_input (prompt, repeat, annotation_suffix); } if (strlen (history_value) > linelength) -- 2.34.1