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Implement "info proc cmdline" for NetBSD

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Add nbsd_pid_to_cmdline() to query the program command line.

gdb/ChangeLog:

        * nbsd-nat.c (nbsd_pid_to_cmdline): Add.
        (nbsd_nat_target::info_proc): Add do_cmdline.
This commit is contained in:
Kamil Rytarowski
2020-04-12 21:09:48 +02:00
parent b4848d2a7b
commit 49d1d1f53d
2 changed files with 44 additions and 0 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2020-04-12 Kamil Rytarowski <n54@gmx.com>
* nbsd-nat.c (nbsd_pid_to_cmdline): Add.
(nbsd_nat_target::info_proc): Add do_cmdline.
2020-04-12 Kamil Rytarowski <n54@gmx.com> 2020-04-12 Kamil Rytarowski <n54@gmx.com>
* nbsd-nat.c (nbsd_pid_to_cwd): Add. * nbsd-nat.c (nbsd_pid_to_cwd): Add.

39
gdb/nbsd-nat.c
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@ -58,6 +58,33 @@ nbsd_pid_to_cwd (int pid)
return buf; return buf;
} }
/* Return the command line for the process identified by PID. */
static gdb::unique_xmalloc_ptr<char[]>
nbsd_pid_to_cmdline (int pid)
{
int mib[4] = {CTL_KERN, KERN_PROC_ARGS, pid, KERN_PROC_ARGV};
size_t size = 0;
if (sysctl (mib, ARRAY_SIZE (mib), NULL, &size, NULL, 0) == -1 || size == 0)
return nullptr;
gdb::unique_xmalloc_ptr<char[]> args (XNEWVAR (char, size));
if (sysctl (mib, ARRAY_SIZE (mib), args.get (), &size, NULL, 0) == -1
|| size == 0)
return nullptr;
/* Arguments are returned as a flattened string with NUL separators.
Join the arguments with spaces to form a single string. */
for (size_t i = 0; i < size - 1; i++)
if (args[i] == '\0')
args[i] = ' ';
args[size - 1] = '\0';
return args;
}
/* Generic thread (LWP) lister within a specified process. The callback /* Generic thread (LWP) lister within a specified process. The callback
parameters is a C++ function that is called for each detected thread. */ parameters is a C++ function that is called for each detected thread. */
@ -313,6 +340,7 @@ bool
nbsd_nat_target::info_proc (const char *args, enum info_proc_what what) nbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
{ {
pid_t pid; pid_t pid;
bool do_cmdline = false;
bool do_cwd = false; bool do_cwd = false;
bool do_exe = false; bool do_exe = false;
bool do_mappings = false; bool do_mappings = false;
@ -322,6 +350,9 @@ nbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
case IP_MAPPINGS: case IP_MAPPINGS:
do_mappings = true; do_mappings = true;
break; break;
case IP_CMDLINE:
do_cmdline = true;
break;
case IP_EXE: case IP_EXE:
do_exe = true; do_exe = true;
break; break;
@ -346,6 +377,14 @@ nbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
printf_filtered (_("process %d\n"), pid); printf_filtered (_("process %d\n"), pid);
if (do_cmdline)
{
gdb::unique_xmalloc_ptr<char[]> cmdline = nbsd_pid_to_cmdline (pid);
if (cmdline != nullptr)
printf_filtered ("cmdline = '%s'\n", cmdline.get ());
else
warning (_("unable to fetch command line"));
}
if (do_cwd) if (do_cwd)
{ {
std::string cwd = nbsd_pid_to_cwd (pid); std::string cwd = nbsd_pid_to_cwd (pid);