/*
* Unload all the loaded modules and then refresh the module cache with the
* latest list of loaded modules and their address ranges.
*/
void
dtrace_update(dtrace_hdl_t *dtp)
{
dt_module_t *dmp;
DIR *dirp;
for (dmp = dt_list_next(&dtp->dt_modlist);
dmp != NULL; dmp = dt_list_next(dmp))
dt_module_unload(dtp, dmp);
if (!(dtp->dt_oflags & DTRACE_O_NOSYS)) {
dt_module_update(dtp, "mach_kernel");
}
/*
* Look up all the macro identifiers and set di_id to the latest value.
* This code collaborates with dt_lex.l on the use of di_id. We will
* need to implement something fancier if we need to support non-ints.
*/
dt_idhash_lookup(dtp->dt_macros, "egid")->di_id = getegid();
dt_idhash_lookup(dtp->dt_macros, "euid")->di_id = geteuid();
dt_idhash_lookup(dtp->dt_macros, "gid")->di_id = getgid();
dt_idhash_lookup(dtp->dt_macros, "pid")->di_id = getpid();
dt_idhash_lookup(dtp->dt_macros, "pgid")->di_id = getpgid(0);
dt_idhash_lookup(dtp->dt_macros, "ppid")->di_id = getppid();
dt_idhash_lookup(dtp->dt_macros, "projid")->di_id = getprojid();
dt_idhash_lookup(dtp->dt_macros, "sid")->di_id = getsid(0);
dt_idhash_lookup(dtp->dt_macros, "taskid")->di_id = gettaskid();
dt_idhash_lookup(dtp->dt_macros, "uid")->di_id = getuid();
/*
* Cache the pointers to the modules representing the base executable
* and the run-time linker in the dtrace client handle. Note that on
* x86 krtld is folded into unix, so if we don't find it, use unix
* instead.
*/
dtp->dt_exec = dt_module_lookup_by_name(dtp, "mach_kernel");
dtp->dt_rtld = dt_module_lookup_by_name(dtp, "dyld"); /* XXX to what purpose? */
/*
* If this is the first time we are initializing the module list,
* remove the module for genunix from the module list and then move it
* to the front of the module list. We do this so that type and symbol
* queries encounter genunix and thereby optimize for the common case
* in dtrace_lookup_by_name() and dtrace_lookup_by_type(), below.
*/
if (dtp->dt_exec != NULL &&
dtp->dt_cdefs == NULL && dtp->dt_ddefs == NULL) {
dt_list_delete(&dtp->dt_modlist, dtp->dt_exec);
dt_list_prepend(&dtp->dt_modlist, dtp->dt_exec);
}
}
/*
* Unload all the loaded modules and then refresh the module cache with the
* latest list of loaded modules and their address ranges.
*/
void
dtrace_update(dtrace_hdl_t *dtp)
{
dt_module_t *dmp;
DIR *dirp;
#if defined(__FreeBSD__)
int fileid;
#endif
for (dmp = dt_list_next(&dtp->dt_modlist);
dmp != NULL; dmp = dt_list_next(dmp))
dt_module_unload(dtp, dmp);
#if defined(sun)
/*
* Open /system/object and attempt to create a libdtrace module for
* each kernel module that is loaded on the current system.
*/
if (!(dtp->dt_oflags & DTRACE_O_NOSYS) &&
(dirp = opendir(OBJFS_ROOT)) != NULL) {
struct dirent *dp;
while ((dp = readdir(dirp)) != NULL) {
if (dp->d_name[0] != '.')
dt_module_update(dtp, dp->d_name);
}
(void) closedir(dirp);
}
#elif defined(__FreeBSD__)
/*
* Use FreeBSD's kernel loader interface to discover what kernel
* modules are loaded and create a libdtrace module for each one.
*/
for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
struct kld_file_stat k_stat;
k_stat.version = sizeof(k_stat);
if (kldstat(fileid, &k_stat) == 0)
dt_module_update(dtp, &k_stat);
}
#endif
/*
* Look up all the macro identifiers and set di_id to the latest value.
* This code collaborates with dt_lex.l on the use of di_id. We will
* need to implement something fancier if we need to support non-ints.
*/
dt_idhash_lookup(dtp->dt_macros, "egid")->di_id = getegid();
dt_idhash_lookup(dtp->dt_macros, "euid")->di_id = geteuid();
dt_idhash_lookup(dtp->dt_macros, "gid")->di_id = getgid();
dt_idhash_lookup(dtp->dt_macros, "pid")->di_id = getpid();
dt_idhash_lookup(dtp->dt_macros, "pgid")->di_id = getpgid(0);
dt_idhash_lookup(dtp->dt_macros, "ppid")->di_id = getppid();
#if defined(sun)
dt_idhash_lookup(dtp->dt_macros, "projid")->di_id = getprojid();
#endif
dt_idhash_lookup(dtp->dt_macros, "sid")->di_id = getsid(0);
#if defined(sun)
dt_idhash_lookup(dtp->dt_macros, "taskid")->di_id = gettaskid();
#endif
dt_idhash_lookup(dtp->dt_macros, "uid")->di_id = getuid();
/*
* Cache the pointers to the modules representing the base executable
* and the run-time linker in the dtrace client handle. Note that on
* x86 krtld is folded into unix, so if we don't find it, use unix
* instead.
*/
dtp->dt_exec = dt_module_lookup_by_name(dtp, "genunix");
dtp->dt_rtld = dt_module_lookup_by_name(dtp, "krtld");
if (dtp->dt_rtld == NULL)
dtp->dt_rtld = dt_module_lookup_by_name(dtp, "unix");
/*
* If this is the first time we are initializing the module list,
* remove the module for genunix from the module list and then move it
* to the front of the module list. We do this so that type and symbol
* queries encounter genunix and thereby optimize for the common case
* in dtrace_lookup_by_name() and dtrace_lookup_by_type(), below.
*/
if (dtp->dt_exec != NULL &&
dtp->dt_cdefs == NULL && dtp->dt_ddefs == NULL) {
dt_list_delete(&dtp->dt_modlist, dtp->dt_exec);
dt_list_prepend(&dtp->dt_modlist, dtp->dt_exec);
}
}
