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gdb: define type aliases for fork_inferior() callbacks

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The `fork_inferior()` function accepts multiple callbacks, making its
signature a bit hard to read.  Define some type aliases to make it a bit
clearer.  Use function view for all, while at it.

Change-Id: Ide8d1fa533d0c5eaf3249860f8c0d339baa09bce
Approved-By: Tom Tromey <tom@tromey.com>
This commit is contained in:
Simon Marchi 2024-05-16 12:55:01 -04:00
parent 89457440e4
commit 108f22e4eb
2 changed files with 18 additions and 15 deletions
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15
gdb/nat/fork-inferior.c
View File

@ -266,12 +266,9 @@ execv_argv::init_for_shell (const char *exec_file,
pid_t
fork_inferior (const char *exec_file_arg, const std::string &allargs,
char **env, void (*traceme_fun) (),
gdb::function_view<void (int)> init_trace_fun,
void (*pre_trace_fun) (),
const char *shell_file_arg,
void (*exec_fun)(const char *file, char * const *argv,
char * const *env))
char **env, traceme_ftype traceme_fun,
init_trace_ftype init_trace_fun, pre_trace_ftype pre_trace_fun,
const char *shell_file_arg, exec_ftype exec_fun)
{
pid_t pid;
/* Set debug_fork then attach to the child while it sleeps, to debug. */
@ -337,7 +334,7 @@ fork_inferior (const char *exec_file_arg, const std::string &allargs,
happen to prepare to handle the child we're about fork, do it
now... */
if (pre_trace_fun != NULL)
(*pre_trace_fun) ();
pre_trace_fun ();
/* Create the child process. Since the child process is going to
exec(3) shortly afterwards, try to reduce the overhead by
@ -389,7 +386,7 @@ fork_inferior (const char *exec_file_arg, const std::string &allargs,
for the inferior. */
/* "Trace me, Dr. Memory!" */
(*traceme_fun) ();
traceme_fun ();
/* The call above set this process (the "child") as debuggable
by the original gdb process (the "parent"). Since processes
@ -412,7 +409,7 @@ fork_inferior (const char *exec_file_arg, const std::string &allargs,
char **argv = child_argv.argv ();
if (exec_fun != NULL)
(*exec_fun) (argv[0], &argv[0], env);
exec_fun (argv[0], &argv[0], env);
else
execvp (argv[0], &argv[0]);

18
gdb/nat/fork-inferior.h
View File

@ -31,6 +31,13 @@ struct process_stratum_target;
implementations. */
#define START_INFERIOR_TRAPS_EXPECTED 1
using traceme_ftype = gdb::function_view<void ()>;
using init_trace_ftype = gdb::function_view<void (int /* pid */)>;
using pre_trace_ftype = gdb::function_view<void ()>;
using exec_ftype = gdb::function_view<void (const char * /* file */,
char * const * /* argv */,
char * const * /* env */)>;
/* Start an inferior Unix child process and sets inferior_ptid to its
pid. EXEC_FILE is the file to run. ALLARGS is a string containing
the arguments to the program. ENV is the environment vector to
@ -42,13 +49,12 @@ struct process_stratum_target;
made static to ensure that they survive the vfork call. */
extern pid_t fork_inferior (const char *exec_file_arg,
const std::string &allargs,
char **env, void (*traceme_fun) (),
gdb::function_view<void (int)> init_trace_fun,
void (*pre_trace_fun) (),
char **env,
traceme_ftype traceme_fun,
init_trace_ftype init_trace_fun,
pre_trace_ftype pre_trace_fun,
const char *shell_file_arg,
void (*exec_fun) (const char *file,
char * const *argv,
char * const *env));
exec_ftype exec_fun);
/* Accept NTRAPS traps from the inferior.