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Require kinfo_get_file and kinfo_get_vmmap for FreeBSD hosts.

Browse Source 
FreeBSD systems have provided these functions in libutil since 7.1
release.  The most recent release without support is 6.4 released in
November of 2008.

This also requires libutil-freebsd on GNU/kFreeBSD systems.  I assume
that those systems have supported kinfo_get_file and kinfo_get_vmmap
over a similar timeframe.

gdb/ChangeLog:

	* configure.ac: Remove check for kinfo_getvmmap().
	* configure, config.in: Regenerate.
	* fbsd-nat.c (fbsd_read_mapping): Remove
	(fbsd_nat_target::find_memory_regions): Remove the procfs version.
	(fbsd_nat_target::info_proc): Assume kinfo_getfile() and
	kinfo_get_vmmap() are always present.

gdbsupport/ChangeLog:

	* common.m4 (GDB_AC_COMMON): Refactor checks for kinfo_getfile().
	* configure, config.in: Regenerate.
This commit is contained in:
John Baldwin
2020-09-16 11:40:05 -07:00
parent 1f17d37249
commit e911c6663b
9 changed files with 53 additions and 178 deletions
Download Patch File Download Diff File Expand all files Collapse all files

101
gdb/fbsd-nat.c
View File

@@ -34,12 +34,7 @@
#include <sys/signal.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#if defined(HAVE_KINFO_GETFILE) || defined(HAVE_KINFO_GETVMMAP)
#include <libutil.h>
#endif
#if !defined(HAVE_KINFO_GETVMMAP)
#include "gdbsupport/filestuff.h"
#endif
#include "elf-bfd.h"
#include "fbsd-nat.h"
@@ -71,7 +66,6 @@ fbsd_nat_target::pid_to_exec_file (int pid)
return NULL;
}
#ifdef HAVE_KINFO_GETVMMAP
/* Iterate over all the memory regions in the current inferior,
calling FUNC for each memory region. DATA is passed as the last
argument to FUNC. */
@@ -124,77 +118,6 @@ fbsd_nat_target::find_memory_regions (find_memory_region_ftype func,
}
return 0;
}
#else
static int
fbsd_read_mapping (FILE *mapfile, unsigned long *start, unsigned long *end,
char *protection)
{
/* FreeBSD 5.1-RELEASE uses a 256-byte buffer. */
char buf[256];
int resident, privateresident;
unsigned long obj;
int ret = EOF;
/* As of FreeBSD 5.0-RELEASE, the layout is described in
/usr/src/sys/fs/procfs/procfs_map.c. Somewhere in 5.1-CURRENT a
new column was added to the procfs map. Therefore we can't use
fscanf since we need to support older releases too. */
if (fgets (buf, sizeof buf, mapfile) != NULL)
ret = sscanf (buf, "%lx %lx %d %d %lx %s", start, end,
&resident, &privateresident, &obj, protection);
return (ret != 0 && ret != EOF);
}
/* Iterate over all the memory regions in the current inferior,
calling FUNC for each memory region. DATA is passed as the last
argument to FUNC. */
int
fbsd_nat_target::find_memory_regions (find_memory_region_ftype func,
void *data)
{
pid_t pid = inferior_ptid.pid ();
unsigned long start, end, size;
char protection[4];
int read, write, exec;
std::string mapfilename = string_printf ("/proc/%ld/map", (long) pid);
gdb_file_up mapfile (fopen (mapfilename.c_str (), "r"));
if (mapfile == NULL)
error (_("Couldn't open %s."), mapfilename.c_str ());
if (info_verbose)
fprintf_filtered (gdb_stdout,
"Reading memory regions from %s\n", mapfilename.c_str ());
/* Now iterate until end-of-file. */
while (fbsd_read_mapping (mapfile.get (), &start, &end, &protection[0]))
{
size = end - start;
read = (strchr (protection, 'r') != 0);
write = (strchr (protection, 'w') != 0);
exec = (strchr (protection, 'x') != 0);
if (info_verbose)
{
fprintf_filtered (gdb_stdout,
"Save segment, %ld bytes at %s (%c%c%c)\n",
size, paddress (target_gdbarch (), start),
read ? 'r' : '-',
write ? 'w' : '-',
exec ? 'x' : '-');
}
/* Invoke the callback function to create the corefile segment.
Pass MODIFIED as true, we do not know the real modification state. */
func (start, size, read, write, exec, 1, data);
}
return 0;
}
#endif
/* Fetch the command line for a running process. */
@@ -251,21 +174,15 @@ fbsd_fetch_kinfo_proc (pid_t pid, struct kinfo_proc *kp)
bool
fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
{
#ifdef HAVE_KINFO_GETFILE
gdb::unique_xmalloc_ptr<struct kinfo_file> fdtbl;
int nfd = 0;
#endif
struct kinfo_proc kp;
pid_t pid;
bool do_cmdline = false;
bool do_cwd = false;
bool do_exe = false;
#ifdef HAVE_KINFO_GETFILE
bool do_files = false;
#endif
#ifdef HAVE_KINFO_GETVMMAP
bool do_mappings = false;
#endif
bool do_status = false;
switch (what)
@@ -275,11 +192,9 @@ fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
do_cwd = true;
do_exe = true;
break;
#ifdef HAVE_KINFO_GETVMMAP
case IP_MAPPINGS:
do_mappings = true;
break;
#endif
case IP_STATUS:
case IP_STAT:
do_status = true;
@@ -293,21 +208,15 @@ fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
case IP_CWD:
do_cwd = true;
break;
#ifdef HAVE_KINFO_GETFILE
case IP_FILES:
do_files = true;
break;
#endif
case IP_ALL:
do_cmdline = true;
do_cwd = true;
do_exe = true;
#ifdef HAVE_KINFO_GETFILE
do_files = true;
#endif
#ifdef HAVE_KINFO_GETVMMAP
do_mappings = true;
#endif
do_status = true;
break;
default:
@@ -327,10 +236,8 @@ fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
error (_("Invalid arguments."));
printf_filtered (_("process %d\n"), pid);
#ifdef HAVE_KINFO_GETFILE
if (do_cwd || do_exe || do_files)
fdtbl.reset (kinfo_getfile (pid, &nfd));
#endif
if (do_cmdline)
{
@@ -343,7 +250,6 @@ fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
if (do_cwd)
{
const char *cwd = NULL;
#ifdef HAVE_KINFO_GETFILE
struct kinfo_file *kf = fdtbl.get ();
for (int i = 0; i < nfd; i++, kf++)
{
@@ -353,7 +259,6 @@ fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
break;
}
}
#endif
if (cwd != NULL)
printf_filtered ("cwd = '%s'\n", cwd);
else
@@ -362,7 +267,6 @@ fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
if (do_exe)
{
const char *exe = NULL;
#ifdef HAVE_KINFO_GETFILE
struct kinfo_file *kf = fdtbl.get ();
for (int i = 0; i < nfd; i++, kf++)
{
@@ -372,7 +276,6 @@ fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
break;
}
}
#endif
if (exe == NULL)
exe = pid_to_exec_file (pid);
if (exe != NULL)
@@ -380,7 +283,6 @@ fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
else
warning (_("unable to fetch executable path name"));
}
#ifdef HAVE_KINFO_GETFILE
if (do_files)
{
struct kinfo_file *kf = fdtbl.get ();
@@ -398,8 +300,6 @@ fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
else
warning (_("unable to fetch list of open files"));
}
#endif
#ifdef HAVE_KINFO_GETVMMAP
if (do_mappings)
{
int nvment;
@@ -421,7 +321,6 @@ fbsd_nat_target::info_proc (const char *args, enum info_proc_what what)
else
warning (_("unable to fetch virtual memory map"));
}
#endif
if (do_status)
{
if (!fbsd_fetch_kinfo_proc (pid, &kp))