/*
* The #pragma depends_on directive can be used to express a dependency on a
* module, provider or library which if not present will cause processing to
* abort.
*/
static void
dt_pragma_depends(const char *prname, dt_node_t *cnp)
{
dtrace_hdl_t *dtp = yypcb->pcb_hdl;
dt_node_t *nnp = cnp ? cnp->dn_list : NULL;
int found;
dt_lib_depend_t *dld;
if (cnp == NULL || nnp == NULL ||
cnp->dn_kind != DT_NODE_IDENT || nnp->dn_kind != DT_NODE_IDENT) {
xyerror(D_PRAGMA_MALFORM, "malformed #pragma %s "
"<class> <name>\n", prname);
}
if (strcmp(cnp->dn_string, "provider") == 0)
found = dt_provider_lookup(dtp, nnp->dn_string) != NULL;
else if (strcmp(cnp->dn_string, "module") == 0) {
dt_module_t *mp = dt_module_lookup_by_name(dtp, nnp->dn_string);
found = mp != NULL && dt_module_getctf(dtp, mp) != NULL;
} else if (strcmp(cnp->dn_string, "library") == 0) {
/*
* We have the file we are working on in dtp->dt_filetag
* so find that node and add the dependency in.
*/
if (yypcb->pcb_cflags & DTRACE_C_CTL) {
char lib[MAXPATHLEN];
dld = dt_lib_depend_lookup(&dtp->dt_lib_dep,
dtp->dt_filetag);
assert(dld != NULL);
(void) snprintf(lib, MAXPATHLEN, "%s%s",
dld->dtld_libpath, nnp->dn_string);
if ((dt_lib_depend_add(dtp, &dld->dtld_dependencies,
lib)) != 0) {
xyerror(D_PRAGMA_DEPEND,
"failed to add dependency %s:%s\n",
lib,
dtrace_errmsg(dtp, dtrace_errno(dtp)));
}
}
found = 1;
} else {
xyerror(D_PRAGMA_INVAL, "invalid class %s "
"specified by #pragma %s\n", cnp->dn_string, prname);
}
if (!found) {
xyerror(D_PRAGMA_DEPEND, "program requires %s %s\n",
cnp->dn_string, nnp->dn_string);
}
}
/*
* The #pragma depends_on directive can be used to express a dependency on a
* module, provider or library which if not present will cause processing to
* abort.
*/
static void
dt_pragma_depends(const char *prname, dt_node_t *cnp)
{
dtrace_hdl_t *dtp = yypcb->pcb_hdl;
dt_node_t *nnp = cnp ? cnp->dn_list : NULL;
int found;
dt_lib_depend_t *dld;
char lib[MAXPATHLEN];
size_t plen;
char *provs, *cpy, *tok;
if (cnp == NULL || nnp == NULL ||
cnp->dn_kind != DT_NODE_IDENT || nnp->dn_kind != DT_NODE_IDENT) {
xyerror(D_PRAGMA_MALFORM, "malformed #pragma %s "
"<class> <name>\n", prname);
}
if (strcmp(cnp->dn_string, "provider") == 0) {
/*
* First try to get the provider list using the
* debug.dtrace.providers sysctl, since that'll work even if
* we're not running as root.
*/
provs = NULL;
if (sysctlbyname("debug.dtrace.providers", NULL, &plen, NULL, 0) ||
((provs = dt_alloc(dtp, plen)) == NULL) ||
sysctlbyname("debug.dtrace.providers", provs, &plen, NULL, 0))
found = dt_provider_lookup(dtp, nnp->dn_string) != NULL;
else {
found = B_FALSE;
for (cpy = provs; (tok = strsep(&cpy, " ")) != NULL; )
if (strcmp(tok, nnp->dn_string) == 0) {
found = B_TRUE;
break;
}
if (found == B_FALSE)
found = dt_provider_lookup(dtp,
nnp->dn_string) != NULL;
}
if (provs != NULL)
dt_free(dtp, provs);
} else if (strcmp(cnp->dn_string, "module") == 0) {
dt_module_t *mp = dt_module_lookup_by_name(dtp, nnp->dn_string);
found = mp != NULL && dt_module_getctf(dtp, mp) != NULL;
} else if (strcmp(cnp->dn_string, "library") == 0) {
if (yypcb->pcb_cflags & DTRACE_C_CTL) {
assert(dtp->dt_filetag != NULL);
dt_pragma_depends_finddep(dtp, nnp->dn_string, lib,
sizeof (lib));
dld = dt_lib_depend_lookup(&dtp->dt_lib_dep,
dtp->dt_filetag);
assert(dld != NULL);
if ((dt_lib_depend_add(dtp, &dld->dtld_dependencies,
lib)) != 0) {
xyerror(D_PRAGMA_DEPEND,
"failed to add dependency %s:%s\n", lib,
dtrace_errmsg(dtp, dtrace_errno(dtp)));
}
} else {
/*
* By this point we have already performed a topological
* sort of the dependencies; we process this directive
* as satisfied as long as the dependency was properly
* loaded.
*/
if (dtp->dt_filetag == NULL)
xyerror(D_PRAGMA_DEPEND, "main program may "
"not explicitly depend on a library");
dld = dt_lib_depend_lookup(&dtp->dt_lib_dep,
dtp->dt_filetag);
assert(dld != NULL);
dt_pragma_depends_finddep(dtp, nnp->dn_string, lib,
sizeof (lib));
dld = dt_lib_depend_lookup(&dtp->dt_lib_dep_sorted,
lib);
assert(dld != NULL);
if (!dld->dtld_loaded)
xyerror(D_PRAGMA_DEPEND, "program requires "
"library \"%s\" which failed to load",
lib);
}
found = B_TRUE;
} else {
xyerror(D_PRAGMA_INVAL, "invalid class %s "
"specified by #pragma %s\n", cnp->dn_string, prname);
}
if (!found) {
xyerror(D_PRAGMA_DEPEND, "program requires %s %s\n",
cnp->dn_string, nnp->dn_string);
}
}
