proc_modules impl
This commit is contained in:
Doug MacEachern
parent
13d1d102f8
commit
51eb79a392
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@ -160,6 +160,12 @@ enum {
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KSTAT_KEYS_syspages,
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} kstat_keys_e;
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typedef struct ps_prochandle * (*proc_grab_func_t)(pid_t, int, int *);
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typedef void (*proc_free_func_t)(void *);
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typedef void (*proc_objname_func_t)(void *, uintptr_t, const char *, size_t);
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struct sigar_t {
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SIGAR_T_BASE;
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@ -201,6 +207,12 @@ struct sigar_t {
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sigar_pid_t last_pid;
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psinfo_t *pinfo;
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sigar_cpu_list_t cpulist;
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/* libproc.so interface */
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void *plib;
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proc_grab_func_t pgrab;
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proc_free_func_t pfree;
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proc_objname_func_t pobjname;
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};
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#define kSTAT_uint(v, type) \
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@ -5,6 +5,8 @@
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#include <sys/proc.h>
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#include <sys/swap.h>
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#include <sys/stat.h>
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#include <dlfcn.h>
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#define KSTAT_LIST_INIT(sigar, dev) \
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sigar->koffsets.dev[0] = -1; \
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@ -71,6 +73,11 @@ int sigar_os_open(sigar_t **sig)
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sigar->last_pid = -1;
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sigar->pinfo = NULL;
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sigar->plib = NULL;
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sigar->pgrab = NULL;
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sigar->pfree = NULL;
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sigar->pobjname = NULL;
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return SIGAR_OK;
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}
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@ -103,6 +110,9 @@ int sigar_os_close(sigar_t *sigar)
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if (sigar->cpulist.size != 0) {
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sigar_cpu_list_destroy(sigar, &sigar->cpulist);
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}
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if (sigar->plib) {
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dlclose(sigar->plib);
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}
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free(sigar);
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return SIGAR_OK;
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}
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@ -651,10 +661,182 @@ int sigar_proc_exe_get(sigar_t *sigar, sigar_pid_t pid,
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return SIGAR_ENOTIMPL;
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}
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/* from libproc.h, not included w/ solaris distro */
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/* Error codes from Pgrab(), Pfgrab_core(), and Pgrab_core() */
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#define G_STRANGE -1 /* Unanticipated error, errno is meaningful */
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#define G_NOPROC 1 /* No such process */
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#define G_NOCORE 2 /* No such core file */
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#define G_NOPROCORCORE 3 /* No such proc or core (for proc_arg_grab) */
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#define G_NOEXEC 4 /* Cannot locate executable file */
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#define G_ZOMB 5 /* Zombie process */
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#define G_PERM 6 /* No permission */
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#define G_BUSY 7 /* Another process has control */
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#define G_SYS 8 /* System process */
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#define G_SELF 9 /* Process is self */
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#define G_INTR 10 /* Interrupt received while grabbing */
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#define G_LP64 11 /* Process is _LP64, self is ILP32 */
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#define G_FORMAT 12 /* File is not an ELF format core file */
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#define G_ELF 13 /* Libelf error, elf_errno() is meaningful */
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#define G_NOTE 14 /* Required PT_NOTE Phdr not present in core */
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static int sigar_read_xmaps(sigar_t *sigar,
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prxmap_t *xmaps, int total,
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unsigned long *last_inode,
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struct ps_prochandle *phandle,
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sigar_proc_modules_t *procmods)
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{
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int status, i;
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unsigned long inode;
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char buffer[BUFSIZ];
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for (i=0; i<total; i++) {
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if (xmaps[i].pr_mflags & MA_ANON) {
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continue; /* heap, stack, etc */
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}
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inode = xmaps[i].pr_ino;
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if ((inode == 0) || (inode == *last_inode)) {
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*last_inode = 0;
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continue;
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}
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*last_inode = inode;
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sigar->pobjname(phandle, xmaps[i].pr_vaddr, buffer, sizeof(buffer));
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status =
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procmods->module_getter(procmods->data, buffer, strlen(buffer));
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if (status != SIGAR_OK) {
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/* not an error; just stop iterating */
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return status;
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}
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}
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return SIGAR_OK;
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}
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#define LIBPROC "/usr/lib/libproc.so"
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#define CHECK_PSYM(s) \
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if (!sigar->s) { \
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sigar_log_printf(sigar, SIGAR_LOG_WARN, \
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"[%s] Symbol not found: %s", \
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SIGAR_FUNC, #s); \
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dlclose(sigar->plib); \
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sigar->plib = NULL; \
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return SIGAR_ENOTIMPL; \
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}
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static int sigar_pgrab_modules(sigar_t *sigar, sigar_pid_t pid,
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sigar_proc_modules_t *procmods)
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{
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int fd, pstatus;
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off_t map_size, nread;
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unsigned long last_inode = 0;
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prxmap_t xmaps[15]; /* ~2K */
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struct ps_prochandle *phandle;
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struct stat statbuf;
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char buffer[BUFSIZ];
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if (!sigar->plib) {
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/* libproc.so ships with 5.8+ */
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/* interface is undocumented, see libproc.h in the sun jdk sources */
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sigar->plib = dlopen(LIBPROC, RTLD_LAZY);
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if (!sigar->plib) {
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sigar_log_printf(sigar, SIGAR_LOG_WARN,
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"dlopen(%s) = %s",
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LIBPROC, dlerror());
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return SIGAR_ENOTIMPL;
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}
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sigar->pgrab = (proc_grab_func_t)dlsym(sigar->plib, "Pgrab");
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sigar->pfree = (proc_free_func_t)dlsym(sigar->plib, "Pfree");
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sigar->pobjname = (proc_objname_func_t)dlsym(sigar->plib, "Pobjname");
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CHECK_PSYM(pgrab);
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CHECK_PSYM(pfree);
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CHECK_PSYM(pobjname);
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}
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if (!(phandle = sigar->pgrab(pid, 0x01, &pstatus))) {
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switch (pstatus) {
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case G_NOPROC:
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return ESRCH;
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case G_PERM:
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return EACCES;
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default:
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sigar_log_printf(sigar, SIGAR_LOG_ERROR,
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"[%s] Pgrab error=%d",
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SIGAR_FUNC, pstatus);
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return ENOTSUP; /*XXX*/
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}
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}
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(void)SIGAR_PROC_FILENAME(buffer, pid, "/xmap");
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if ((fd = open(buffer, O_RDONLY)) < 0) {
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return errno;
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}
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if (fstat(fd, &statbuf) < 0) {
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close(fd);
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return errno;
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}
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map_size = statbuf.st_size;
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if (SIGAR_LOG_IS_DEBUG(sigar)) {
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sigar_log_printf(sigar, SIGAR_LOG_DEBUG,
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"[%s] pid=%d, size=%d",
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SIGAR_FUNC, pid, map_size);
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}
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for (nread=0; nread<statbuf.st_size; ) {
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off_t wanted = map_size > sizeof(xmaps) ? sizeof(xmaps) : map_size;
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int total = wanted / sizeof(prxmap_t);
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if (pread(fd, xmaps, wanted, nread) != wanted) {
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close(fd);
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return errno;
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}
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if (SIGAR_LOG_IS_DEBUG(sigar)) {
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sigar_log_printf(sigar, SIGAR_LOG_DEBUG,
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"[%s] nread=%d, map_size=%d, wanted=%d, total=%d",
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SIGAR_FUNC,
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nread, map_size, wanted, total);
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}
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if (sigar_read_xmaps(sigar, xmaps, total,
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&last_inode,
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phandle, procmods) != SIGAR_OK)
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{
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break;
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}
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nread += wanted;
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map_size -= wanted;
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}
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close(fd);
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sigar->pfree(phandle);
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return SIGAR_OK;
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}
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int sigar_proc_modules_get(sigar_t *sigar, sigar_pid_t pid,
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sigar_proc_modules_t *procmods)
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{
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return SIGAR_ENOTIMPL;
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if (pid == sigar_pid_get(sigar)) {
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return SIGAR_ENOTIMPL;
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}
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else {
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return sigar_pgrab_modules(sigar, pid, procmods);
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}
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}
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#include <sys/mnttab.h>
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