jlong DTraceJSDT::activate(
jint version, jstring module_name, jint providers_count,
JVM_DTraceProvider* providers, TRAPS) {
size_t count = 0;
RegisteredProbes* probes = NULL;
if (!is_supported()) {
return 0;
}
assert(module_name != NULL, "valid module name");
assert(providers != NULL, "valid provider array");
for (int i = 0; i < providers_count; ++i) {
count += providers[i].probe_count;
}
probes = new RegisteredProbes(count);
count = 0;
for (int i = 0; i < providers_count; ++i) {
assert(providers[i].name != NULL, "valid provider name");
assert(providers[i].probe_count == 0 || providers[i].probes != NULL,
"valid probe count");
for (int j = 0; j < providers[i].probe_count; ++j) {
JVM_DTraceProbe* probe = &(providers[i].probes[j]);
assert(probe != NULL, "valid probe");
assert(probe->method != NULL, "valid method");
assert(probe->name != NULL, "valid probe name");
assert(probe->function != NULL, "valid probe function spec");
methodHandle h_method =
methodHandle(THREAD, JNIHandles::resolve_jmethod_id(probe->method));
nmethod* nm = AdapterHandlerLibrary::create_dtrace_nmethod(h_method);
if (nm == NULL) {
delete probes;
THROW_MSG_0(vmSymbols::java_lang_RuntimeException(),
"Unable to register DTrace probes (CodeCache: no room for DTrace nmethods).");
}
h_method()->set_not_compilable(CompLevel_highest_tier);
h_method()->set_code(h_method, nm);
probes->nmethod_at_put(count++, nm);
}
}
int handle = pd_activate((void*)probes,
module_name, providers_count, providers);
if (handle <= 0) {
delete probes;
THROW_MSG_0(vmSymbols::java_lang_RuntimeException(),
"Unable to register DTrace probes (internal error).");
}
probes->set_helper_handle(handle);
return RegisteredProbes::toOpaqueProbes(probes);
}
void bootloader_paging_init(void)
{
t_uint32 limit;
t_uint32 addr;
t_uint16 i;
t_ia32_page pg;
/*
* 1)
*/
if (pd_build(bootloader_init_alloc(PD_MAX_ENTRIES * sizeof(t_ia32_pde),
NULL), &pd, 1) != ERROR_NONE)
{
printf("cannot build a page-directory\n");
bootloader_error();
}
/*
* 2)
*/
init->machdep.pd = pd;
/*
* 3)
*/
if (pt_build(bootloader_init_alloc(PT_MAX_ENTRIES * sizeof(t_ia32_pte),
NULL), &pt0, 1) != ERROR_NONE)
{
printf("cannot build a page-table\n");
bootloader_error();
}
pt0.present = 1;
pt0.rw = PT_WRITABLE;
pt0.user = PT_PRIVILEGED;
pt0.cached = PT_CACHED;
pt0.writeback = PT_WRITEBACK;
pd_add_table(&pd, 0, pt0);
pg.present = 1;
pg.rw = PG_WRITABLE;
pg.user = PG_PRIVILEGED;
pg.cached = PG_CACHED;
pg.writeback = PG_WRITEBACK;
for (i = 0, addr = PAGESZ; i < PT_MAX_ENTRIES - 1; i++, addr += PAGESZ)
{
pg.addr = addr;
pt_add_page(&pt0, PTE_ENTRY(addr), pg);
}
/*
* 4)
*/
limit = bootloader_init_alloc(0, NULL);
for (addr = init->kcode; addr < limit; addr += PAGESZ)
{
if (pd_get_table(&pd, PDE_ENTRY(addr), &pt) != ERROR_NONE)
{
if (pt_build(bootloader_init_alloc(PT_MAX_ENTRIES *
sizeof(t_ia32_pte),
NULL), &pt, 1) != ERROR_NONE)
{
printf("cannot build a page-table\n");
bootloader_error();
}
pt.present = 1;
pt.rw = PT_WRITABLE;
pt.user = PT_PRIVILEGED;
pt.cached = PT_CACHED;
pt.writeback = PT_WRITEBACK;
pd_add_table(&pd, PDE_ENTRY(addr), pt);
limit += PAGESZ;
}
pg.addr = addr;
pt_add_page(&pt, PTE_ENTRY(addr), pg);
}
/*
* 5)
*/
pd_activate(pd, PD_CACHED, PD_WRITEBACK);
/*
* 6)
*/
paging_enable();
}
