--- a/hotspot/src/share/vm/code/nmethod.cpp Thu May 20 01:34:22 2010 -0700
+++ b/hotspot/src/share/vm/code/nmethod.cpp Thu May 20 06:34:23 2010 -0700
@@ -99,12 +99,12 @@
code_size += nm->code_size();
stub_size += nm->stub_size();
consts_size += nm->consts_size();
+ oops_size += nm->oops_size();
scopes_data_size += nm->scopes_data_size();
scopes_pcs_size += nm->scopes_pcs_size();
dependencies_size += nm->dependencies_size();
handler_table_size += nm->handler_table_size();
nul_chk_table_size += nm->nul_chk_table_size();
- oops_size += nm->oops_size();
}
void print_nmethod_stats() {
if (nmethod_count == 0) return;
@@ -114,12 +114,12 @@
if (code_size != 0) tty->print_cr(" main code = %d", code_size);
if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size);
if (consts_size != 0) tty->print_cr(" constants = %d", consts_size);
+ if (oops_size != 0) tty->print_cr(" oops = %d", oops_size);
if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size);
if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size);
if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size);
if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size);
if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size);
- if (oops_size != 0) tty->print_cr(" oops = %d", oops_size);
}
int native_nmethod_count;
@@ -600,7 +600,8 @@
#endif // def HAVE_DTRACE_H
_stub_offset = data_offset();
_consts_offset = data_offset();
- _scopes_data_offset = data_offset();
+ _oops_offset = data_offset();
+ _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize);
_scopes_pcs_offset = _scopes_data_offset;
_dependencies_offset = _scopes_pcs_offset;
_handler_table_offset = _dependencies_offset;
@@ -690,7 +691,8 @@
_orig_pc_offset = 0;
_stub_offset = data_offset();
_consts_offset = data_offset();
- _scopes_data_offset = data_offset();
+ _oops_offset = data_offset();
+ _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize);
_scopes_pcs_offset = _scopes_data_offset;
_dependencies_offset = _scopes_pcs_offset;
_handler_table_offset = _dependencies_offset;
@@ -805,8 +807,9 @@
_unwind_handler_offset = -1;
}
_consts_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start());
- _scopes_data_offset = data_offset();
- _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize);
+ _oops_offset = data_offset();
+ _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize);
+ _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize);
_dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size());
_handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize);
_nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize);
@@ -990,6 +993,79 @@
}
+// Promote one word from an assembly-time handle to a live embedded oop.
+inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) {
+ if (handle == NULL ||
+ // As a special case, IC oops are initialized to 1 or -1.
+ handle == (jobject) Universe::non_oop_word()) {
+ (*dest) = (oop) handle;
+ } else {
+ (*dest) = JNIHandles::resolve_non_null(handle);
+ }
+}
+
+
+void nmethod::copy_oops(GrowableArray<jobject>* array) {
+ //assert(oops_size() == 0, "do this handshake just once, please");
+ int length = array->length();
+ assert((address)(oops_begin() + length) <= data_end(), "oops big enough");
+ oop* dest = oops_begin();
+ for (int index = 0 ; index < length; index++) {
+ initialize_immediate_oop(&dest[index], array->at(index));
+ }
+
+ // Now we can fix up all the oops in the code. We need to do this
+ // in the code because the assembler uses jobjects as placeholders.
+ // The code and relocations have already been initialized by the
+ // CodeBlob constructor, so it is valid even at this early point to
+ // iterate over relocations and patch the code.
+ fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true);
+}
+
+
+bool nmethod::is_at_poll_return(address pc) {
+ RelocIterator iter(this, pc, pc+1);
+ while (iter.next()) {
+ if (iter.type() == relocInfo::poll_return_type)
+ return true;
+ }
+ return false;
+}
+
+
+bool nmethod::is_at_poll_or_poll_return(address pc) {
+ RelocIterator iter(this, pc, pc+1);
+ while (iter.next()) {
+ relocInfo::relocType t = iter.type();
+ if (t == relocInfo::poll_return_type || t == relocInfo::poll_type)
+ return true;
+ }
+ return false;
+}
+
+
+void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) {
+ // re-patch all oop-bearing instructions, just in case some oops moved
+ RelocIterator iter(this, begin, end);
+ while (iter.next()) {
+ if (iter.type() == relocInfo::oop_type) {
+ oop_Relocation* reloc = iter.oop_reloc();
+ if (initialize_immediates && reloc->oop_is_immediate()) {
+ oop* dest = reloc->oop_addr();
+ initialize_immediate_oop(dest, (jobject) *dest);
+ }
+ // Refresh the oop-related bits of this instruction.
+ reloc->fix_oop_relocation();
+ }
+
+ // There must not be any interfering patches or breakpoints.
+ assert(!(iter.type() == relocInfo::breakpoint_type
+ && iter.breakpoint_reloc()->active()),
+ "no active breakpoint");
+ }
+}
+
+
ScopeDesc* nmethod::scope_desc_at(address pc) {
PcDesc* pd = pc_desc_at(pc);
guarantee(pd != NULL, "scope must be present");
@@ -2282,6 +2358,10 @@
consts_begin(),
consts_end(),
consts_size());
+ if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
+ oops_begin(),
+ oops_end(),
+ oops_size());
if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
scopes_data_begin(),
scopes_data_end(),