--- a/hotspot/src/share/vm/classfile/classFileParser.cpp Mon Aug 24 13:52:42 2009 -0700
+++ b/hotspot/src/share/vm/classfile/classFileParser.cpp Tue Aug 11 15:37:23 2009 -0700
@@ -2924,12 +2924,12 @@
// Prepare list of oops for oop maps generation.
u2* nonstatic_oop_offsets;
- u2* nonstatic_oop_length;
+ u2* nonstatic_oop_counts;
int nonstatic_oop_map_count = 0;
nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
THREAD, u2, nonstatic_oop_count+1);
- nonstatic_oop_length = NEW_RESOURCE_ARRAY_IN_THREAD(
+ nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD(
THREAD, u2, nonstatic_oop_count+1);
// Add fake fields for java.lang.Class instances (also see above).
@@ -2939,7 +2939,7 @@
nonstatic_oop_offsets[0] = (u2)first_nonstatic_field_offset;
int fake_oop_count = (( next_nonstatic_field_offset -
first_nonstatic_field_offset ) / heapOopSize);
- nonstatic_oop_length [0] = (u2)fake_oop_count;
+ nonstatic_oop_counts [0] = (u2)fake_oop_count;
nonstatic_oop_map_count = 1;
nonstatic_oop_count -= fake_oop_count;
first_nonstatic_oop_offset = first_nonstatic_field_offset;
@@ -3119,13 +3119,13 @@
// Update oop maps
if( nonstatic_oop_map_count > 0 &&
nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
- (u2)(real_offset - nonstatic_oop_length[nonstatic_oop_map_count - 1] * heapOopSize) ) {
+ (u2)(real_offset - nonstatic_oop_counts[nonstatic_oop_map_count - 1] * heapOopSize) ) {
// Extend current oop map
- nonstatic_oop_length[nonstatic_oop_map_count - 1] += 1;
+ nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1;
} else {
// Create new oop map
nonstatic_oop_offsets[nonstatic_oop_map_count] = (u2)real_offset;
- nonstatic_oop_length [nonstatic_oop_map_count] = 1;
+ nonstatic_oop_counts [nonstatic_oop_map_count] = 1;
nonstatic_oop_map_count += 1;
if( first_nonstatic_oop_offset == 0 ) { // Undefined
first_nonstatic_oop_offset = real_offset;
@@ -3182,8 +3182,10 @@
assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value");
- // Size of non-static oop map blocks (in words) allocated at end of klass
- int nonstatic_oop_map_size = compute_oop_map_size(super_klass, nonstatic_oop_map_count, first_nonstatic_oop_offset);
+ // Number of non-static oop map blocks allocated at end of klass.
+ int total_oop_map_count = compute_oop_map_count(super_klass,
+ nonstatic_oop_map_count,
+ first_nonstatic_oop_offset);
// Compute reference type
ReferenceType rt;
@@ -3196,12 +3198,13 @@
// We can now create the basic klassOop for this klass
klassOop ik = oopFactory::new_instanceKlass(
vtable_size, itable_size,
- static_field_size, nonstatic_oop_map_size,
+ static_field_size, total_oop_map_count,
rt, CHECK_(nullHandle));
instanceKlassHandle this_klass (THREAD, ik);
- assert(this_klass->static_field_size() == static_field_size &&
- this_klass->nonstatic_oop_map_size() == nonstatic_oop_map_size, "sanity check");
+ assert(this_klass->static_field_size() == static_field_size, "sanity");
+ assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count,
+ "sanity");
// Fill in information already parsed
this_klass->set_access_flags(access_flags);
@@ -3282,7 +3285,7 @@
klassItable::setup_itable_offset_table(this_klass);
// Do final class setup
- fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_length);
+ fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts);
set_precomputed_flags(this_klass);
@@ -3375,66 +3378,71 @@
}
-int ClassFileParser::compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_map_count, int first_nonstatic_oop_offset) {
- int map_size = super.is_null() ? 0 : super->nonstatic_oop_map_size();
+int ClassFileParser::compute_oop_map_count(instanceKlassHandle super,
+ int nonstatic_oop_map_count,
+ int first_nonstatic_oop_offset) {
+ int map_count = super.is_null() ? 0 : super->nonstatic_oop_map_count();
if (nonstatic_oop_map_count > 0) {
// We have oops to add to map
- if (map_size == 0) {
- map_size = nonstatic_oop_map_count;
+ if (map_count == 0) {
+ map_count = nonstatic_oop_map_count;
} else {
- // Check whether we should add a new map block or whether the last one can be extended
- OopMapBlock* first_map = super->start_of_nonstatic_oop_maps();
- OopMapBlock* last_map = first_map + map_size - 1;
-
- int next_offset = last_map->offset() + (last_map->length() * heapOopSize);
+ // Check whether we should add a new map block or whether the last one can
+ // be extended
+ OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps();
+ OopMapBlock* const last_map = first_map + map_count - 1;
+
+ int next_offset = last_map->offset() + last_map->count() * heapOopSize;
if (next_offset == first_nonstatic_oop_offset) {
// There is no gap bettwen superklass's last oop field and first
// local oop field, merge maps.
nonstatic_oop_map_count -= 1;
} else {
// Superklass didn't end with a oop field, add extra maps
- assert(next_offset<first_nonstatic_oop_offset, "just checking");
+ assert(next_offset < first_nonstatic_oop_offset, "just checking");
}
- map_size += nonstatic_oop_map_count;
+ map_count += nonstatic_oop_map_count;
}
}
- return map_size;
+ return map_count;
}
void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
- int nonstatic_oop_map_count,
- u2* nonstatic_oop_offsets, u2* nonstatic_oop_length) {
+ int nonstatic_oop_map_count,
+ u2* nonstatic_oop_offsets,
+ u2* nonstatic_oop_counts) {
OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
- OopMapBlock* last_oop_map = this_oop_map + k->nonstatic_oop_map_size();
- instanceKlass* super = k->superklass();
- if (super != NULL) {
- int super_oop_map_size = super->nonstatic_oop_map_size();
+ const instanceKlass* const super = k->superklass();
+ const int super_count = super != NULL ? super->nonstatic_oop_map_count() : 0;
+ if (super_count > 0) {
+ // Copy maps from superklass
OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
- // Copy maps from superklass
- while (super_oop_map_size-- > 0) {
+ for (int i = 0; i < super_count; ++i) {
*this_oop_map++ = *super_oop_map++;
}
}
+
if (nonstatic_oop_map_count > 0) {
- if (this_oop_map + nonstatic_oop_map_count > last_oop_map) {
- // Calculated in compute_oop_map_size() number of oop maps is less then
- // collected oop maps since there is no gap between superklass's last oop
- // field and first local oop field. Extend the last oop map copied
+ if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) {
+ // The counts differ because there is no gap between superklass's last oop
+ // field and the first local oop field. Extend the last oop map copied
// from the superklass instead of creating new one.
nonstatic_oop_map_count--;
nonstatic_oop_offsets++;
this_oop_map--;
- this_oop_map->set_length(this_oop_map->length() + *nonstatic_oop_length++);
+ this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++);
this_oop_map++;
}
- assert((this_oop_map + nonstatic_oop_map_count) == last_oop_map, "just checking");
+
// Add new map blocks, fill them
while (nonstatic_oop_map_count-- > 0) {
this_oop_map->set_offset(*nonstatic_oop_offsets++);
- this_oop_map->set_length(*nonstatic_oop_length++);
+ this_oop_map->set_count(*nonstatic_oop_counts++);
this_oop_map++;
}
+ assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() ==
+ this_oop_map, "sanity");
}
}