< prev index next > src/hotspot/share/code/codeCache.cpp
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* questions.
*
*/
#include "precompiled.hpp"
+ #include "cds/cdsAccess.hpp"
#include "code/codeBlob.hpp"
#include "code/codeCache.hpp"
#include "code/codeHeapState.hpp"
#include "code/compiledIC.hpp"
#include "code/dependencies.hpp"
#include "code/dependencyContext.hpp"
#include "code/nmethod.hpp"
#include "code/pcDesc.hpp"
+ #include "code/SCCache.hpp"
#include "compiler/compilationPolicy.hpp"
#include "compiler/compileBroker.hpp"
#include "compiler/compilerDefinitions.inline.hpp"
#include "compiler/oopMap.hpp"
#include "gc/shared/barrierSetNMethod.hpp"
address CodeCache::_low_bound = nullptr;
address CodeCache::_high_bound = nullptr;
volatile int CodeCache::_number_of_nmethods_with_dependencies = 0;
ExceptionCache* volatile CodeCache::_exception_cache_purge_list = nullptr;
+ static ReservedSpace _cds_code_space;
+
// Initialize arrays of CodeHeap subsets
GrowableArray<CodeHeap*>* CodeCache::_heaps = new(mtCode) GrowableArray<CodeHeap*> (static_cast<int>(CodeBlobType::All), mtCode);
GrowableArray<CodeHeap*>* CodeCache::_nmethod_heaps = new(mtCode) GrowableArray<CodeHeap*> (static_cast<int>(CodeBlobType::All), mtCode);
GrowableArray<CodeHeap*>* CodeCache::_allocable_heaps = new(mtCode) GrowableArray<CodeHeap*> (static_cast<int>(CodeBlobType::All), mtCode);
assert(!heap->set, "sanity");
heap->size = (available_size > (used_size + min_size)) ? (available_size - used_size) : min_size;
}
void CodeCache::initialize_heaps() {
-
CodeHeapInfo non_nmethod = {NonNMethodCodeHeapSize, FLAG_IS_CMDLINE(NonNMethodCodeHeapSize), true};
CodeHeapInfo profiled = {ProfiledCodeHeapSize, FLAG_IS_CMDLINE(ProfiledCodeHeapSize), true};
CodeHeapInfo non_profiled = {NonProfiledCodeHeapSize, FLAG_IS_CMDLINE(NonProfiledCodeHeapSize), true};
const bool cache_size_set = FLAG_IS_CMDLINE(ReservedCodeCacheSize);
assert(heap_available(CodeBlobType::MethodNonProfiled), "MethodNonProfiled heap is always available for segmented code heap");
size_t compiler_buffer_size = 0;
COMPILER1_PRESENT(compiler_buffer_size += CompilationPolicy::c1_count() * Compiler::code_buffer_size());
COMPILER2_PRESENT(compiler_buffer_size += CompilationPolicy::c2_count() * C2Compiler::initial_code_buffer_size());
+ COMPILER2_PRESENT(compiler_buffer_size += (CompilationPolicy::c2_count() + CompilationPolicy::c3_count()) * C2Compiler::initial_code_buffer_size());
if (!non_nmethod.set) {
non_nmethod.size += compiler_buffer_size;
// Further down, just before FLAG_SET_ERGO(), all segment sizes are
// aligned down to the next lower multiple of min_size. For large page
FLAG_SET_ERGO(NonNMethodCodeHeapSize, non_nmethod.size);
FLAG_SET_ERGO(ProfiledCodeHeapSize, profiled.size);
FLAG_SET_ERGO(NonProfiledCodeHeapSize, non_profiled.size);
FLAG_SET_ERGO(ReservedCodeCacheSize, cache_size);
+ const size_t cds_code_size = align_up(CDSAccess::get_cached_code_size(), min_size);
+ cache_size += cds_code_size;
+
ReservedCodeSpace rs = reserve_heap_memory(cache_size, ps);
// Register CodeHeaps with LSan as we sometimes embed pointers to malloc memory.
LSAN_REGISTER_ROOT_REGION(rs.base(), rs.size());
size_t offset = 0;
+ if (cds_code_size > 0) {
+ // FIXME: use CodeHeapInfo for this hack ...
+ _cds_code_space = rs.partition(offset, cds_code_size);
+ offset += cds_code_size;
+ }
+
if (profiled.enabled) {
ReservedSpace profiled_space = rs.partition(offset, profiled.size);
offset += profiled.size;
// Tier 2 and tier 3 (profiled) methods
add_heap(profiled_space, "CodeHeap 'profiled nmethods'", CodeBlobType::MethodProfiled);
// Tier 1 and tier 4 (non-profiled) methods and native methods
add_heap(non_profiled_space, "CodeHeap 'non-profiled nmethods'", CodeBlobType::MethodNonProfiled);
}
}
+ void* CodeCache::map_cached_code() {
+ if (_cds_code_space.size() > 0 && CDSAccess::map_cached_code(_cds_code_space)) {
+ return _cds_code_space.base();
+ } else {
+ return nullptr;
+ }
+ }
+
size_t CodeCache::page_size(bool aligned, size_t min_pages) {
return aligned ? os::page_size_for_region_aligned(ReservedCodeCacheSize, min_pages) :
os::page_size_for_region_unaligned(ReservedCodeCacheSize, min_pages);
}
DependencySignature* current_sig = new DependencySignature(deps);
// Determine if dependency is already checked. table->put(...) returns
// 'true' if the dependency is added (i.e., was not in the hashtable).
if (table->put(*current_sig, 1)) {
! if (deps.check_dependency() != nullptr) {
// Dependency checking failed. Print out information about the failed
// dependency and finally fail with an assert. We can fail here, since
// dependency checking is never done in a product build.
! tty->print_cr("Failed dependency:");
changes.print();
nm->print();
nm->print_dependencies_on(tty);
assert(false, "Should have been marked for deoptimization");
}
DependencySignature* current_sig = new DependencySignature(deps);
// Determine if dependency is already checked. table->put(...) returns
// 'true' if the dependency is added (i.e., was not in the hashtable).
if (table->put(*current_sig, 1)) {
! Klass* witness = deps.check_dependency();
+ if (witness != nullptr) {
// Dependency checking failed. Print out information about the failed
// dependency and finally fail with an assert. We can fail here, since
// dependency checking is never done in a product build.
! deps.print_dependency(tty, witness, true);
changes.print();
nm->print();
nm->print_dependencies_on(tty);
assert(false, "Should have been marked for deoptimization");
}
// nmethod::check_all_dependencies works only correctly, if no safepoint
// can happen
NoSafepointVerifier nsv;
for (DepChange::ContextStream str(changes, nsv); str.next(); ) {
InstanceKlass* d = str.klass();
+ {
+ LogStreamHandle(Trace, dependencies) log;
+ if (log.is_enabled()) {
+ log.print("Processing context ");
+ d->name()->print_value_on(&log);
+ }
+ }
d->mark_dependent_nmethods(deopt_scope, changes);
}
#ifndef PRODUCT
if (VerifyDependencies) {
tty->print_cr("Allocated in freelist: " SSIZE_FORMAT "kB", bytes_allocated_in_freelists()/K);
tty->print_cr("Unused bytes in CodeBlobs: " SSIZE_FORMAT "kB", (wasted_bytes/K));
tty->print_cr("Segment map size: " SSIZE_FORMAT "kB", allocated_segments()/K); // 1 byte per segment
}
+ static void print_helper1(outputStream* st, const char* prefix, int total, int not_entrant, int used) {
+ if (total > 0) {
+ double ratio = (100.0 * used) / total;
+ st->print("%s %3d nmethods: %3d not_entrant, %d used (%2.1f%%)", prefix, total, not_entrant, used, ratio);
+ }
+ }
+
+ void CodeCache::print_nmethod_statistics_on(outputStream* st) {
+ int stats [2][6][3][2] = {0};
+ int stats_used[2][6][3][2] = {0};
+
+ int total_osr = 0;
+ int total_entrant = 0;
+ int total_non_entrant = 0;
+ int total_other = 0;
+ int total_used = 0;
+
+ NMethodIterator iter(NMethodIterator::all);
+ while (iter.next()) {
+ nmethod* nm = iter.method();
+ if (nm->is_in_use()) {
+ ++total_entrant;
+ } else if (nm->is_not_entrant()) {
+ ++total_non_entrant;
+ } else {
+ ++total_other;
+ }
+ if (nm->is_osr_method()) {
+ ++total_osr;
+ }
+ if (nm->used()) {
+ ++total_used;
+ }
+ assert(!nm->preloaded() || nm->comp_level() == CompLevel_full_optimization, "");
+
+ int idx1 = nm->is_scc() ? 1 : 0;
+ int idx2 = nm->comp_level() + (nm->preloaded() ? 1 : 0);
+ int idx3 = (nm->is_in_use() ? 0 :
+ (nm->is_not_entrant() ? 1 :
+ 2));
+ int idx4 = (nm->is_osr_method() ? 1 : 0);
+ stats[idx1][idx2][idx3][idx4] += 1;
+ if (nm->used()) {
+ stats_used[idx1][idx2][idx3][idx4] += 1;
+ }
+ }
+
+ st->print("Total: %d methods (%d entrant / %d not_entrant; osr: %d ",
+ total_entrant + total_non_entrant + total_other,
+ total_entrant, total_non_entrant, total_osr);
+ if (total_other > 0) {
+ st->print("; %d other", total_other);
+ }
+ st->print_cr(")");
+
+ for (int i = CompLevel_simple; i <= CompLevel_full_optimization; i++) {
+ int total_normal = stats[0][i][0][0] + stats[0][i][1][0] + stats[0][i][2][0];
+ int total_osr = stats[0][i][0][1] + stats[0][i][1][1] + stats[0][i][2][1];
+ if (total_normal + total_osr > 0) {
+ st->print(" Tier%d:", i);
+ print_helper1(st, "", total_normal, stats[0][i][1][0], stats_used[0][i][0][0] + stats_used[0][i][1][0]);
+ print_helper1(st, "; osr:", total_osr, stats[0][i][1][1], stats_used[0][i][0][1] + stats_used[0][i][1][1]);
+ st->cr();
+ }
+ }
+ st->cr();
+ for (int i = CompLevel_simple; i <= CompLevel_full_optimization + 1; i++) {
+ int total_normal = stats[1][i][0][0] + stats[1][i][1][0] + stats[1][i][2][0];
+ int total_osr = stats[1][i][0][1] + stats[1][i][1][1] + stats[1][i][2][1];
+ assert(total_osr == 0, "sanity");
+ if (total_normal + total_osr > 0) {
+ st->print(" SC T%d:", i);
+ print_helper1(st, "", total_normal, stats[1][i][1][0], stats_used[1][i][0][0] + stats_used[1][i][1][0]);
+ print_helper1(st, "; osr:", total_osr, stats[1][i][1][1], stats_used[1][i][0][1] + stats_used[1][i][1][1]);
+ st->cr();
+ }
+ }
+ }
+
//------------------------------------------------------------------------------------------------
// Non-product version
#ifndef PRODUCT
int max_nm_size = 0;
ResourceMark rm;
int i = 0;
FOR_ALL_ALLOCABLE_HEAPS(heap) {
! if ((_nmethod_heaps->length() >= 1) && Verbose) {
! tty->print_cr("-- %s --", (*heap)->name());
- }
FOR_ALL_BLOBS(cb, *heap) {
total++;
if (cb->is_nmethod()) {
nmethod* nm = (nmethod*)cb;
! if (Verbose && nm->method() != nullptr) {
! ResourceMark rm;
- char *method_name = nm->method()->name_and_sig_as_C_string();
- tty->print("%s", method_name);
- if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); }
- }
nmethodCount++;
if(nm->is_not_entrant()) { nmethodNotEntrant++; }
if(nm->method() != nullptr && nm->is_native_method()) { nmethodNative++; }
int max_nm_size = 0;
ResourceMark rm;
int i = 0;
FOR_ALL_ALLOCABLE_HEAPS(heap) {
! int heap_total = 0;
! tty->print_cr("-- %s --", (*heap)->name());
FOR_ALL_BLOBS(cb, *heap) {
total++;
+ heap_total++;
if (cb->is_nmethod()) {
nmethod* nm = (nmethod*)cb;
! tty->print("%4d: ", heap_total);
! CompileTask::print(tty, nm, (nm->is_not_entrant() ? "non-entrant" : ""), true, true);
nmethodCount++;
if(nm->is_not_entrant()) { nmethodNotEntrant++; }
if(nm->method() != nullptr && nm->is_native_method()) { nmethodNative++; }
}
#endif // !PRODUCT
}
+ void CodeCache::print_nmethods_on(outputStream* st) {
+ ResourceMark rm;
+ int i = 0;
+ FOR_ALL_ALLOCABLE_HEAPS(heap) {
+ st->print_cr("-- %s --", (*heap)->name());
+ FOR_ALL_BLOBS(cb, *heap) {
+ i++;
+ if (cb->is_nmethod()) {
+ nmethod* nm = (nmethod*)cb;
+ st->print("%4d: ", i);
+ CompileTask::print(st, nm, nullptr, true, false);
+
+ const char non_entrant_char = (nm->is_not_entrant() ? 'N' : ' ');
+ st->print_cr(" %c", non_entrant_char);
+ }
+ }
+ }
+ }
+
void CodeCache::print_summary(outputStream* st, bool detailed) {
int full_count = 0;
julong total_used = 0;
julong total_max_used = 0;
julong total_free = 0;
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