-/* Linux-specific methods for using the /proc file system.
+/* GNU/Linux specific methods for using the /proc file system.
+
Copyright 2001, 2002 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "inferior.h"
#include <sys/param.h> /* for MAXPATHLEN */
-#include <sys/procfs.h>
+#include <sys/procfs.h> /* for elf_gregset etc. */
+#include <sys/stat.h> /* for struct stat */
+#include <ctype.h> /* for isdigit */
+#include <unistd.h> /* for open, pread64 */
+#include <fcntl.h> /* for O_RDONLY */
+#include "regcache.h" /* for registers_changed */
#include "gregset.h" /* for gregset */
#include "gdbcore.h" /* for get_exec_file */
#include "gdbthread.h" /* for struct thread_info etc. */
-#include "elf-bfd.h"
+#include "elf-bfd.h" /* for elfcore_write_* */
+#include "cli/cli-decode.h" /* for add_info */
+#include "gdb_string.h"
+
+#ifndef O_LARGEFILE
+#define O_LARGEFILE 0
+#endif
/* Function: child_pid_to_exec_file
*
return name1;
}
+/* Function: read_mappings
+ *
+ * Service function for corefiles and info proc.
+ */
+
+static int
+read_mapping (FILE *mapfile,
+ long long *addr,
+ long long *endaddr,
+ char *permissions,
+ long long *offset,
+ char *device,
+ long long *inode,
+ char *filename)
+{
+ int ret = fscanf (mapfile, "%llx-%llx %s %llx %s %llx",
+ addr, endaddr, permissions, offset, device, inode);
+
+ if (ret > 0 && ret != EOF && *inode != 0)
+ {
+ /* Eat everything up to EOL for the filename. This will prevent
+ weird filenames (such as one with embedded whitespace) from
+ confusing this code. It also makes this code more robust
+ in respect to annotations the kernel may add after the
+ filename.
+
+ Note the filename is used for informational purposes only. */
+ ret += fscanf (mapfile, "%[^\n]\n", filename);
+ }
+ else
+ {
+ filename[0] = '\0'; /* no filename */
+ fscanf (mapfile, "\n");
+ }
+ return (ret != 0 && ret != EOF);
+}
+
/* Function: linux_find_memory_regions
*
* Fills the "to_find_memory_regions" target vector.
void *obfd)
{
long long pid = PIDGET (inferior_ptid);
- char procfilename[MAXPATHLEN];
- FILE *procfile;
+ char mapsfilename[MAXPATHLEN];
+ FILE *mapsfile;
long long addr, endaddr, size, offset, inode;
- char perms[8], dev[8], filename[MAXPATHLEN];
+ char permissions[8], device[8], filename[MAXPATHLEN];
int read, write, exec;
int ret;
/* Compose the filename for the /proc memory map, and open it. */
- sprintf (procfilename, "/proc/%lld/maps", pid);
- if ((procfile = fopen (procfilename, "r")) == NULL)
- error ("Could not open %s\n", procfilename);
+ sprintf (mapsfilename, "/proc/%lld/maps", pid);
+ if ((mapsfile = fopen (mapsfilename, "r")) == NULL)
+ error ("Could not open %s\n", mapsfilename);
if (info_verbose)
fprintf_filtered (gdb_stdout,
- "Reading memory regions from %s\n", procfilename);
-
- /* Read the first memory segment descriptor from the maps file. */
- ret = fscanf (procfile, "%llx-%llx %s %llx %s %llx",
- &addr, &endaddr, perms, &offset, dev, &inode);
- if (inode)
- fscanf (procfile, " %s\n", filename);
- else
- {
- filename[0] = '\0';
- fscanf (procfile, "\n");
- }
+ "Reading memory regions from %s\n", mapsfilename);
/* Now iterate until end-of-file. */
- while (ret > 0 && ret != EOF)
+ while (read_mapping (mapsfile, &addr, &endaddr, &permissions[0],
+ &offset, &device[0], &inode, &filename[0]))
{
size = endaddr - addr;
/* Get the segment's permissions. */
- read = (strchr (perms, 'r') != 0);
- write = (strchr (perms, 'w') != 0);
- exec = (strchr (perms, 'x') != 0);
+ read = (strchr (permissions, 'r') != 0);
+ write = (strchr (permissions, 'w') != 0);
+ exec = (strchr (permissions, 'x') != 0);
if (info_verbose)
{
/* Invoke the callback function to create the corefile segment. */
func (addr, size, read, write, exec, obfd);
-
- /* Read the next memory region. */
- filename[0] = '\0';
- ret = fscanf (procfile, "%llx-%llx %s %llx %s %llx",
- &addr, &endaddr, perms, &offset, dev, &inode);
- if (inode)
- fscanf (procfile, " %s\n", filename);
- else
- {
- filename[0] = '\0';
- fscanf (procfile, "\n");
- }
}
-
- fclose (procfile);
+ fclose (mapsfile);
return 0;
}
{
gdb_gregset_t gregs;
gdb_fpregset_t fpregs;
+#ifdef FILL_FPXREGSET
+ gdb_fpxregset_t fpxregs;
+#endif
unsigned long merged_pid = ptid_get_tid (ptid) << 16 | ptid_get_pid (ptid);
fill_gregset (&gregs, -1);
note_size,
&fpregs,
sizeof (fpregs));
+#ifdef FILL_FPXREGSET
+ fill_fpxregset (&fpxregs, -1);
+ note_data = (char *) elfcore_write_prxfpreg (obfd,
+ note_data,
+ note_size,
+ &fpxregs,
+ sizeof (fpxregs));
+#endif
return note_data;
}
-struct linux_corefile_thread_data {
- bfd *obfd;
+struct linux_corefile_thread_data
+{
+ bfd *obfd;
char *note_data;
- int *note_size;
+ int *note_size;
+ int num_notes;
};
/* Function: linux_corefile_thread_callback
ti->ptid,
args->note_data,
args->note_size);
+ args->num_notes++;
inferior_ptid = saved_ptid;
registers_changed ();
target_fetch_registers (-1); /* FIXME should not be necessary;
thread_args.obfd = obfd;
thread_args.note_data = note_data;
thread_args.note_size = note_size;
+ thread_args.num_notes = 0;
iterate_over_threads (linux_corefile_thread_callback, &thread_args);
- if (thread_args.note_data == note_data)
+ if (thread_args.num_notes == 0)
{
/* iterate_over_threads didn't come up with any threads;
- just use inferior_ptid. */
+ just use inferior_ptid. */
note_data = linux_do_thread_registers (obfd, inferior_ptid,
note_data, note_size);
}
return note_data;
}
+/*
+ * Function: linux_info_proc_cmd
+ *
+ * Implement the "info proc" command.
+ */
+
+static void
+linux_info_proc_cmd (char *args, int from_tty)
+{
+ long long pid = PIDGET (inferior_ptid);
+ FILE *procfile;
+ char **argv = NULL;
+ char buffer[MAXPATHLEN];
+ char fname1[MAXPATHLEN], fname2[MAXPATHLEN];
+ int cmdline_f = 1;
+ int cwd_f = 1;
+ int exe_f = 1;
+ int mappings_f = 0;
+ int environ_f = 0;
+ int status_f = 0;
+ int stat_f = 0;
+ int all = 0;
+ struct stat dummy;
+
+ if (args)
+ {
+ /* Break up 'args' into an argv array. */
+ if ((argv = buildargv (args)) == NULL)
+ nomem (0);
+ else
+ make_cleanup_freeargv (argv);
+ }
+ while (argv != NULL && *argv != NULL)
+ {
+ if (isdigit (argv[0][0]))
+ {
+ pid = strtoul (argv[0], NULL, 10);
+ }
+ else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0)
+ {
+ mappings_f = 1;
+ }
+ else if (strcmp (argv[0], "status") == 0)
+ {
+ status_f = 1;
+ }
+ else if (strcmp (argv[0], "stat") == 0)
+ {
+ stat_f = 1;
+ }
+ else if (strcmp (argv[0], "cmd") == 0)
+ {
+ cmdline_f = 1;
+ }
+ else if (strncmp (argv[0], "exe", strlen (argv[0])) == 0)
+ {
+ exe_f = 1;
+ }
+ else if (strcmp (argv[0], "cwd") == 0)
+ {
+ cwd_f = 1;
+ }
+ else if (strncmp (argv[0], "all", strlen (argv[0])) == 0)
+ {
+ all = 1;
+ }
+ else
+ {
+ /* [...] (future options here) */
+ }
+ argv++;
+ }
+ if (pid == 0)
+ error ("No current process: you must name one.");
+
+ sprintf (fname1, "/proc/%lld", pid);
+ if (stat (fname1, &dummy) != 0)
+ error ("No /proc directory: '%s'", fname1);
+
+ printf_filtered ("process %lld\n", pid);
+ if (cmdline_f || all)
+ {
+ sprintf (fname1, "/proc/%lld/cmdline", pid);
+ if ((procfile = fopen (fname1, "r")) > 0)
+ {
+ fgets (buffer, sizeof (buffer), procfile);
+ printf_filtered ("cmdline = '%s'\n", buffer);
+ fclose (procfile);
+ }
+ else
+ warning ("unable to open /proc file '%s'", fname1);
+ }
+ if (cwd_f || all)
+ {
+ sprintf (fname1, "/proc/%lld/cwd", pid);
+ memset (fname2, 0, sizeof (fname2));
+ if (readlink (fname1, fname2, sizeof (fname2)) > 0)
+ printf_filtered ("cwd = '%s'\n", fname2);
+ else
+ warning ("unable to read link '%s'", fname1);
+ }
+ if (exe_f || all)
+ {
+ sprintf (fname1, "/proc/%lld/exe", pid);
+ memset (fname2, 0, sizeof (fname2));
+ if (readlink (fname1, fname2, sizeof (fname2)) > 0)
+ printf_filtered ("exe = '%s'\n", fname2);
+ else
+ warning ("unable to read link '%s'", fname1);
+ }
+ if (mappings_f || all)
+ {
+ sprintf (fname1, "/proc/%lld/maps", pid);
+ if ((procfile = fopen (fname1, "r")) > 0)
+ {
+ long long addr, endaddr, size, offset, inode;
+ char permissions[8], device[8], filename[MAXPATHLEN];
+ char *header_fmt_string, *data_fmt_string;
+
+ if (TARGET_ADDR_BIT == 32)
+ {
+ header_fmt_string = "\t%10s %10s %10s %10s %7s\n";
+ data_fmt_string = "\t%#10lx %#10lx %#10x %#10x %7s\n";
+ }
+ else
+ {
+ header_fmt_string = " %18s %18s %10s %10s %7s\n";
+ data_fmt_string = " %#18lx %#18lx %#10x %#10x %7s\n";
+ }
+
+ printf_filtered ("Mapped address spaces:\n\n");
+ printf_filtered (header_fmt_string,
+ "Start Addr",
+ " End Addr",
+ " Size",
+ " Offset",
+ "objfile");
+
+ while (read_mapping (procfile, &addr, &endaddr, &permissions[0],
+ &offset, &device[0], &inode, &filename[0]))
+ {
+ size = endaddr - addr;
+ printf_filtered (data_fmt_string,
+ (unsigned long) addr, /* FIXME: pr_addr */
+ (unsigned long) endaddr,
+ (int) size,
+ (unsigned int) offset,
+ filename[0] ? filename : "");
+
+ }
+
+ fclose (procfile);
+ }
+ else
+ warning ("unable to open /proc file '%s'", fname1);
+ }
+ if (status_f || all)
+ {
+ sprintf (fname1, "/proc/%lld/status", pid);
+ if ((procfile = fopen (fname1, "r")) > 0)
+ {
+ while (fgets (buffer, sizeof (buffer), procfile) != NULL)
+ printf_filtered (buffer);
+ fclose (procfile);
+ }
+ else
+ warning ("unable to open /proc file '%s'", fname1);
+ }
+ if (stat_f || all)
+ {
+ sprintf (fname1, "/proc/%lld/stat", pid);
+ if ((procfile = fopen (fname1, "r")) > 0)
+ {
+ int itmp;
+ char ctmp;
+
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("Process: %d\n", itmp);
+ if (fscanf (procfile, "%s ", &buffer[0]) > 0)
+ printf_filtered ("Exec file: %s\n", buffer);
+ if (fscanf (procfile, "%c ", &ctmp) > 0)
+ printf_filtered ("State: %c\n", ctmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("Parent process: %d\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("Process group: %d\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("Session id: %d\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("TTY: %d\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("TTY owner process group: %d\n", itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("Flags: 0x%x\n", itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("Minor faults (no memory page): %u\n",
+ (unsigned int) itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("Minor faults, children: %u\n",
+ (unsigned int) itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("Major faults (memory page faults): %u\n",
+ (unsigned int) itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("Major faults, children: %u\n",
+ (unsigned int) itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("utime: %d\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("stime: %d\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("utime, children: %d\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("stime, children: %d\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("jiffies remaining in current time slice: %d\n",
+ itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("'nice' value: %d\n", itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("jiffies until next timeout: %u\n",
+ (unsigned int) itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("jiffies until next SIGALRM: %u\n",
+ (unsigned int) itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("start time (jiffies since system boot): %d\n",
+ itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("Virtual memory size: %u\n",
+ (unsigned int) itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("Resident set size: %u\n",
+ (unsigned int) itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("rlim: %u\n",
+ (unsigned int) itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("Start of text: 0x%x\n", itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("End of text: 0x%x\n", itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0)
+ printf_filtered ("Start of stack: 0x%x\n", itmp);
+#if 0 /* Don't know how architecture-dependent the rest is...
+ Anyway the signal bitmap info is available from "status". */
+ if (fscanf (procfile, "%u ", &itmp) > 0) /* FIXME arch? */
+ printf_filtered ("Kernel stack pointer: 0x%x\n", itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0) /* FIXME arch? */
+ printf_filtered ("Kernel instr pointer: 0x%x\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("Pending signals bitmap: 0x%x\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("Blocked signals bitmap: 0x%x\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("Ignored signals bitmap: 0x%x\n", itmp);
+ if (fscanf (procfile, "%d ", &itmp) > 0)
+ printf_filtered ("Catched signals bitmap: 0x%x\n", itmp);
+ if (fscanf (procfile, "%u ", &itmp) > 0) /* FIXME arch? */
+ printf_filtered ("wchan (system call): 0x%x\n", itmp);
+#endif
+ fclose (procfile);
+ }
+ else
+ warning ("unable to open /proc file '%s'", fname1);
+ }
+}
+
void
_initialize_linux_proc (void)
{
inftarg_set_find_memory_regions (linux_find_memory_regions);
inftarg_set_make_corefile_notes (linux_make_note_section);
+
+ add_info ("proc", linux_info_proc_cmd,
+ "Show /proc process information about any running process.\n\
+Specify any process id, or use the program being debugged by default.\n\
+Specify any of the following keywords for detailed info:\n\
+ mappings -- list of mapped memory regions.\n\
+ stat -- list a bunch of random process info.\n\
+ status -- list a different bunch of random process info.\n\
+ all -- list all available /proc info.");
+}
+
+int linux_proc_xfer_memory (CORE_ADDR addr, char *myaddr, int len, int write,
+ struct mem_attrib *attrib,
+ struct target_ops *target)
+{
+ int fd, ret;
+ char filename[64];
+
+ if (write)
+ return 0;
+
+ /* Don't bother for one word. */
+ if (len < 3 * sizeof (long))
+ return 0;
+
+ /* We could keep this file open and cache it - possibly one
+ per thread. That requires some juggling, but is even faster. */
+ sprintf (filename, "/proc/%d/mem", PIDGET (inferior_ptid));
+ fd = open (filename, O_RDONLY | O_LARGEFILE);
+ if (fd == -1)
+ return 0;
+
+ /* If pread64 is available, use it. It's faster if the kernel
+ supports it (only one syscall), and it's 64-bit safe even
+ on 32-bit platforms (for instance, SPARC debugging a SPARC64
+ application).
+
+ We play some autoconf and CFLAGS games to get this declaration
+ exposed: -D_XOPEN_SOURCE=500 -D_LARGEFILE64_SOURCE. And then
+ a -D_BSD_SOURCE to counteract the defaults for _XOPEN_SOURCE. */
+#ifdef HAVE_PREAD64
+ if (pread64 (fd, myaddr, len, addr) != len)
+#else
+ if (lseek (fd, addr, SEEK_SET) == -1
+ || read (fd, myaddr, len) != len)
+#endif
+ ret = 0;
+ else
+ ret = len;
+
+ close (fd);
+ return ret;
}
projects / deliverable / binutils-gdb.git / blobdiff