src/share/vm/code/codeCache.cpp
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*** old/src/share/vm/code/codeCache.cpp Wed Sep 3 12:15:30 2014
--- new/src/share/vm/code/codeCache.cpp Wed Sep 3 12:15:30 2014
*** 42,57 ****
--- 42,65 ----
#include "runtime/handles.inline.hpp"
#include "runtime/arguments.hpp"
#include "runtime/icache.hpp"
#include "runtime/java.hpp"
#include "runtime/mutexLocker.hpp"
+ #include "runtime/compilationPolicy.hpp"
#include "services/memoryService.hpp"
#include "trace/tracing.hpp"
#include "utilities/xmlstream.hpp"
+ #ifdef COMPILER1
+ #include "c1/c1_Compilation.hpp"
+ #include "c1/c1_Compiler.hpp"
+ #endif
+ #ifdef COMPILER2
+ #include "opto/c2compiler.hpp"
+ #include "opto/compile.hpp"
+ #endif
// Helper class for printing in CodeCache
class CodeBlob_sizes {
private:
int count;
int total_size;
int header_size;
*** 113,180 ****
--- 121,337 ----
code_size += cb->code_size();
}
}
};
// CodeCache implementation
+ // Iterate over all CodeHeaps
+ #define FOR_ALL_HEAPS(heap) for (GrowableArrayIterator<CodeHeap*> heap = _heaps->begin(); heap != _heaps->end(); ++heap)
+ // Iterate over all CodeBlobs (cb) on the given CodeHeap
+ #define FOR_ALL_BLOBS(cb, heap) for (CodeBlob* cb = first_blob(heap); cb != NULL; cb = next_blob(heap, cb))
! CodeHeap * CodeCache::_heap = new CodeHeap();
! address CodeCache::_low_bound = 0;
+ address CodeCache::_high_bound = 0;
int CodeCache::_number_of_blobs = 0;
int CodeCache::_number_of_adapters = 0;
int CodeCache::_number_of_nmethods = 0;
int CodeCache::_number_of_nmethods_with_dependencies = 0;
bool CodeCache::_needs_cache_clean = false;
nmethod* CodeCache::_scavenge_root_nmethods = NULL;
int CodeCache::_codemem_full_count = 0;
CodeBlob* CodeCache::first() {
! assert_locked_or_safepoint(CodeCache_lock);
return (CodeBlob*)_heap->first();
}
+ // Initialize array of CodeHeaps
! GrowableArray<CodeHeap*>* CodeCache::_heaps = new(ResourceObj::C_HEAP, mtCode) GrowableArray<CodeHeap*> (3, true);
+ void CodeCache::initialize_heaps() {
+ // Determine size of compiler buffers
+ size_t code_buffers_size = 0;
+ #ifdef COMPILER1
+ // C1 temporary code buffers (see Compiler::init_buffer_blob())
+ const int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
+ code_buffers_size += c1_count * Compiler::code_buffer_size();
+ #endif
+ #ifdef COMPILER2
+ // C2 scratch buffers (see Compile::init_scratch_buffer_blob())
+ const int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
+ // Initial size of constant table (this may be increased if a compiled method needs more space)
+ code_buffers_size += c2_count * C2Compiler::initial_code_buffer_size();
+ #endif
CodeBlob* CodeCache::next(CodeBlob* cb) {
assert_locked_or_safepoint(CodeCache_lock);
return (CodeBlob*)_heap->next(cb);
+ // Calculate default CodeHeap sizes if not set by user
+ if (!FLAG_IS_CMDLINE(NonMethodCodeHeapSize) && !FLAG_IS_CMDLINE(ProfiledCodeHeapSize)
+ && !FLAG_IS_CMDLINE(NonProfiledCodeHeapSize)) {
+ // Increase default NonMethodCodeHeapSize to account for compiler buffers
+ FLAG_SET_ERGO(uintx, NonMethodCodeHeapSize, NonMethodCodeHeapSize + code_buffers_size);
+
+ // Check if we have enough space for the non-method code heap
+ if (ReservedCodeCacheSize > NonMethodCodeHeapSize) {
+ // Use the default value for NonMethodCodeHeapSize and one half of the
+ // remaining size for non-profiled methods and one half for profiled methods
+ size_t remaining_size = ReservedCodeCacheSize - NonMethodCodeHeapSize;
+ size_t profiled_size = remaining_size / 2;
+ size_t non_profiled_size = remaining_size - profiled_size;
+ FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, profiled_size);
+ FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, non_profiled_size);
+ } else {
+ // Use all space for the non-method heap and set other heaps to minimal size
+ FLAG_SET_ERGO(uintx, NonMethodCodeHeapSize, ReservedCodeCacheSize - os::vm_page_size() * 2);
+ FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, os::vm_page_size());
+ FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, os::vm_page_size());
+ }
+ }
+
+ // We do not need the profiled CodeHeap, use all space for the non-profiled CodeHeap
+ if(!heap_available(CodeBlobType::MethodProfiled)) {
+ FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize + ProfiledCodeHeapSize);
+ FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, 0);
+ }
+ // We do not need the non-profiled CodeHeap, use all space for the non-method CodeHeap
+ if(!heap_available(CodeBlobType::MethodNonProfiled)) {
+ FLAG_SET_ERGO(uintx, NonMethodCodeHeapSize, NonMethodCodeHeapSize + NonProfiledCodeHeapSize);
+ FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, 0);
+ }
+
+ // Make sure we have enough space for VM internal code
+ uint min_code_cache_size = (CodeCacheMinimumUseSpace DEBUG_ONLY(* 3)) + CodeCacheMinimumFreeSpace;
+ if (NonMethodCodeHeapSize < (min_code_cache_size + code_buffers_size)) {
+ vm_exit_during_initialization("Not enough space in non-method code heap to run VM.");
+ }
+ guarantee(NonProfiledCodeHeapSize + ProfiledCodeHeapSize + NonMethodCodeHeapSize <= ReservedCodeCacheSize, "Size check");
+
+ // Align reserved sizes of CodeHeaps
+ size_t non_method_size = ReservedCodeSpace::allocation_align_size_up(NonMethodCodeHeapSize);
+ size_t profiled_size = ReservedCodeSpace::allocation_align_size_up(ProfiledCodeHeapSize);
+ size_t non_profiled_size = ReservedCodeSpace::allocation_align_size_up(NonProfiledCodeHeapSize);
+
+ // Compute initial sizes of CodeHeaps
+ size_t init_non_method_size = MIN2(InitialCodeCacheSize, non_method_size);
+ size_t init_profiled_size = MIN2(InitialCodeCacheSize, profiled_size);
+ size_t init_non_profiled_size = MIN2(InitialCodeCacheSize, non_profiled_size);
+
+ // Reserve one continuous chunk of memory for CodeHeaps and split it into
+ // parts for the individual heaps. The memory layout looks like this:
+ // ---------- high -----------
+ // Non-profiled nmethods
+ // Profiled nmethods
+ // Non-methods
+ // ---------- low ------------
+ ReservedCodeSpace rs = reserve_heap_memory(non_profiled_size + profiled_size + non_method_size);
+ ReservedSpace non_method_space = rs.first_part(non_method_size);
+ ReservedSpace rest = rs.last_part(non_method_size);
+ ReservedSpace profiled_space = rest.first_part(profiled_size);
+ ReservedSpace non_profiled_space = rest.last_part(profiled_size);
+
+ // Non-methods (stubs, adapters, ...)
+ add_heap(non_method_space, "non-methods", init_non_method_size, CodeBlobType::NonMethod);
+ // Tier 2 and tier 3 (profiled) methods
+ add_heap(profiled_space, "profiled nmethods", init_profiled_size, CodeBlobType::MethodProfiled);
+ // Tier 1 and tier 4 (non-profiled) methods and native methods
+ add_heap(non_profiled_space, "non-profiled nmethods", init_non_profiled_size, CodeBlobType::MethodNonProfiled);
+ }
+
+ ReservedCodeSpace CodeCache::reserve_heap_memory(size_t size) {
+ // Determine alignment
+ const size_t page_size = os::can_execute_large_page_memory() ?
+ os::page_size_for_region(InitialCodeCacheSize, size, 8) :
+ os::vm_page_size();
+ const size_t granularity = os::vm_allocation_granularity();
+ const size_t r_align = MAX2(page_size, granularity);
+ const size_t r_size = align_size_up(size, r_align);
+ const size_t rs_align = page_size == (size_t) os::vm_page_size() ? 0 :
+ MAX2(page_size, granularity);
+
+ ReservedCodeSpace rs(r_size, rs_align, rs_align > 0);
+
+ // Initialize bounds
+ _low_bound = (address)rs.base();
+ _high_bound = _low_bound + rs.size();
+
+ return rs;
+ }
+
+ bool CodeCache::heap_available(int code_blob_type) {
+ if (!SegmentedCodeCache) {
+ // No segmentation: Use a single code heap
+ return (code_blob_type == CodeBlobType::All);
+ } else if (Arguments::mode() == Arguments::_int) {
+ // Interpreter only: we don't need any method code heaps
+ return (code_blob_type == CodeBlobType::NonMethod);
+ } else if (TieredCompilation || code_blob_type == CodeBlobType::NonMethod) {
+ // Tiered compilation: use all code heaps
+ return (code_blob_type < CodeBlobType::All);
+ } else {
+ // No TieredCompilation: we only need the non-profiled code heap
+ return (code_blob_type == CodeBlobType::MethodNonProfiled);
+ }
}
+ void CodeCache::add_heap(ReservedSpace rs, const char* name, size_t size_initial, int code_blob_type) {
+ // Check if heap is needed
+ if (!heap_available(code_blob_type)) {
+ return;
+ }
CodeBlob* CodeCache::alive(CodeBlob *cb) {
! assert_locked_or_safepoint(CodeCache_lock);
! while (cb != NULL && !cb->is_alive()) cb = next(cb);
return cb;
+ // Create CodeHeap
! CodeHeap* heap = new CodeHeap(name, code_blob_type);
! _heaps->append(heap);
+
+ // Reserve Space
+ size_initial = round_to(size_initial, os::vm_page_size());
+
+ if (!heap->reserve(rs, size_initial, CodeCacheSegmentSize)) {
+ vm_exit_during_initialization("Could not reserve enough space for code cache");
+ }
+
+ // Register the CodeHeap
+ MemoryService::add_code_heap_memory_pool(heap, name);
}
+ CodeHeap* CodeCache::get_code_heap(CodeBlob* cb) {
+ assert(cb != NULL, "CodeBlob is null");
+ FOR_ALL_HEAPS(heap) {
+ if ((*heap)->contains(cb)) {
+ return *heap;
+ }
+ }
+ ShouldNotReachHere();
+ return NULL;
+ }
! nmethod* CodeCache::alive_nmethod(CodeBlob* cb) {
assert_locked_or_safepoint(CodeCache_lock);
while (cb != NULL && (!cb->is_alive() || !cb->is_nmethod())) cb = next(cb);
! return (nmethod*)cb;
! CodeHeap* CodeCache::get_code_heap(int code_blob_type) {
+ FOR_ALL_HEAPS(heap) {
+ if ((*heap)->accepts(code_blob_type)) {
! return *heap;
+ }
+ }
+ return NULL;
}
! nmethod* CodeCache::first_nmethod() {
! CodeBlob* CodeCache::first_blob(CodeHeap* heap) {
assert_locked_or_safepoint(CodeCache_lock);
! CodeBlob* cb = first();
while (cb != NULL && !cb->is_nmethod()) {
cb = next(cb);
! assert(heap != NULL, "heap is null");
+ return (CodeBlob*)heap->first();
+ }
+
+ CodeBlob* CodeCache::first_blob(int code_blob_type) {
+ if (heap_available(code_blob_type)) {
+ return first_blob(get_code_heap(code_blob_type));
+ } else {
+ return NULL;
}
return (nmethod*)cb;
}
! nmethod* CodeCache::next_nmethod (CodeBlob* cb) {
! CodeBlob* CodeCache::next_blob(CodeHeap* heap, CodeBlob* cb) {
assert_locked_or_safepoint(CodeCache_lock);
! cb = next(cb);
while (cb != NULL && !cb->is_nmethod()) {
cb = next(cb);
}
return (nmethod*)cb;
! assert(heap != NULL, "heap is null");
+ return (CodeBlob*)heap->next(cb);
}
static size_t maxCodeCacheUsed = 0;
+ CodeBlob* CodeCache::next_blob(CodeBlob* cb) {
+ return next_blob(get_code_heap(cb), cb);
+ }
! CodeBlob* CodeCache::allocate(int size, int code_blob_type, bool is_critical) {
// Do not seize the CodeCache lock here--if the caller has not
// already done so, we are going to lose bigtime, since the code
// cache will contain a garbage CodeBlob until the caller can
// run the constructor for the CodeBlob subclass he is busy
// instantiating.
*** 182,207 ****
--- 339,376 ----
assert(size > 0, "allocation request must be reasonable");
if (size <= 0) {
return NULL;
}
CodeBlob* cb = NULL;
+
+ // Get CodeHeap for the given CodeBlobType
+ CodeHeap* heap = get_code_heap(SegmentedCodeCache ? code_blob_type : CodeBlobType::All);
+ assert (heap != NULL, "heap is null");
+
while (true) {
- cb = (CodeBlob*)_heap->allocate(size, is_critical);
if (cb != NULL) break;
- if (!_heap->expand_by(CodeCacheExpansionSize)) {
// Expansion failed
+ if (SegmentedCodeCache && (code_blob_type == CodeBlobType::NonMethod)) {
+ // Fallback solution: Store non-method code in the non-profiled code heap
+ return allocate(size, CodeBlobType::MethodNonProfiled, is_critical);
+ }
return NULL;
}
if (PrintCodeCacheExtension) {
ResourceMark rm;
tty->print_cr("code cache extended to [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (" SSIZE_FORMAT " bytes)",
(intptr_t)_heap->low_boundary(), (intptr_t)_heap->high(),
(address)_heap->high() - (address)_heap->low_boundary());
+ if (SegmentedCodeCache) {
+ tty->print("Code heap '%s'", heap->name());
+ } else {
+ tty->print("Code cache");
+ }
+ tty->print_cr(" extended to [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (" SSIZE_FORMAT " bytes)",
+ (intptr_t)heap->low_boundary(), (intptr_t)heap->high(),
+ (address)heap->high() - (address)heap->low_boundary());
}
}
maxCodeCacheUsed = MAX2(maxCodeCacheUsed, ((address)_heap->high_boundary() -
(address)_heap->low_boundary()) - unallocated_capacity());
print_trace("allocation", cb, size);
_number_of_blobs++;
return cb;
}
*** 218,233 ****
--- 387,402 ----
if (cb->is_adapter_blob()) {
_number_of_adapters--;
}
_number_of_blobs--;
_heap->deallocate(cb);
+ // Get heap for given CodeBlob and deallocate
+ get_code_heap(cb)->deallocate(cb);
assert(_number_of_blobs >= 0, "sanity check");
}
void CodeCache::commit(CodeBlob* cb) {
// this is called by nmethod::nmethod, which must already own CodeCache_lock
assert_locked_or_safepoint(CodeCache_lock);
if (cb->is_nmethod()) {
_number_of_nmethods++;
*** 241,333 ****
--- 410,516 ----
// flush the hardware I-cache
ICache::invalidate_range(cb->content_begin(), cb->content_size());
}
// Iteration over CodeBlobs
#define FOR_ALL_BLOBS(var) for (CodeBlob *var = first() ; var != NULL; var = next(var) )
#define FOR_ALL_ALIVE_BLOBS(var) for (CodeBlob *var = alive(first()); var != NULL; var = alive(next(var)))
#define FOR_ALL_ALIVE_NMETHODS(var) for (nmethod *var = alive_nmethod(first()); var != NULL; var = alive_nmethod(next(var)))
bool CodeCache::contains(void *p) {
// It should be ok to call contains without holding a lock
return _heap->contains(p);
+ FOR_ALL_HEAPS(heap) {
+ if ((*heap)->contains(p)) {
+ return true;
+ }
+ }
+ return false;
}
// This method is safe to call without holding the CodeCache_lock, as long as a dead codeblob is not
// looked up (i.e., one that has been marked for deletion). It only dependes on the _segmap to contain
+ // This method is safe to call without holding the CodeCache_lock, as long as a dead CodeBlob is not
+ // looked up (i.e., one that has been marked for deletion). It only depends on the _segmap to contain
// valid indices, which it will always do, as long as the CodeBlob is not in the process of being recycled.
CodeBlob* CodeCache::find_blob(void* start) {
CodeBlob* result = find_blob_unsafe(start);
if (result == NULL) return NULL;
// We could potentially look up non_entrant methods
! guarantee(result == NULL || !result->is_zombie() || result->is_locked_by_vm() || is_error_reported(), "unsafe access to zombie method");
return result;
}
+ // Lookup that does not fail if you lookup a zombie method (if you call this, be sure to know
+ // what you are doing)
+ CodeBlob* CodeCache::find_blob_unsafe(void* start) {
+ // NMT can walk the stack before code cache is created
+ if (_heaps == NULL || _heaps->is_empty()) return NULL;
+
+ FOR_ALL_HEAPS(heap) {
+ CodeBlob* result = (CodeBlob*) (*heap)->find_start(start);
+ if (result != NULL && result->blob_contains((address)start)) {
+ return result;
+ }
+ }
+ return NULL;
+ }
+
nmethod* CodeCache::find_nmethod(void* start) {
! CodeBlob *cb = find_blob(start);
- assert(cb == NULL || cb->is_nmethod(), "did not find an nmethod");
! CodeBlob* cb = find_blob(start);
! assert(cb->is_nmethod(), "did not find an nmethod");
return (nmethod*)cb;
}
void CodeCache::blobs_do(void f(CodeBlob* nm)) {
assert_locked_or_safepoint(CodeCache_lock);
! FOR_ALL_BLOBS(p) {
f(p);
! FOR_ALL_HEAPS(heap) {
+ FOR_ALL_BLOBS(cb, *heap) {
+ f(cb);
+ }
}
}
void CodeCache::nmethods_do(void f(nmethod* nm)) {
assert_locked_or_safepoint(CodeCache_lock);
FOR_ALL_BLOBS(nm) {
if (nm->is_nmethod()) f((nmethod*)nm);
+ NMethodIterator iter;
+ while(iter.next()) {
+ f(iter.method());
}
}
void CodeCache::alive_nmethods_do(void f(nmethod* nm)) {
assert_locked_or_safepoint(CodeCache_lock);
FOR_ALL_ALIVE_NMETHODS(nm) {
f(nm);
+ NMethodIterator iter;
+ while(iter.next_alive()) {
+ f(iter.method());
}
}
int CodeCache::alignment_unit() {
! return (int)_heaps->first()->alignment_unit();
}
int CodeCache::alignment_offset() {
! return (int)_heaps->first()->alignment_offset();
}
// Mark nmethods for unloading if they contain otherwise unreachable
// oops.
+ // Mark nmethods for unloading if they contain otherwise unreachable oops.
void CodeCache::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) {
assert_locked_or_safepoint(CodeCache_lock);
FOR_ALL_ALIVE_NMETHODS(nm) {
nm->do_unloading(is_alive, unloading_occurred);
+ NMethodIterator iter;
+ while(iter.next_alive()) {
+ iter.method()->do_unloading(is_alive, unloading_occurred);
}
}
void CodeCache::blobs_do(CodeBlobClosure* f) {
assert_locked_or_safepoint(CodeCache_lock);
! FOR_ALL_ALIVE_BLOBS(cb) {
! FOR_ALL_HEAPS(heap) {
+ FOR_ALL_BLOBS(cb, *heap) {
+ if (cb->is_alive()) {
f->do_code_blob(cb);
#ifdef ASSERT
if (cb->is_nmethod())
((nmethod*)cb)->verify_scavenge_root_oops();
#endif //ASSERT
}
+ }
+ }
}
// Walk the list of methods which might contain non-perm oops.
void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) {
assert_locked_or_safepoint(CodeCache_lock);
*** 450,511 ****
--- 633,691 ----
verify_perm_nmethods(f);
}
// Temporarily mark nmethods that are claimed to be on the non-perm list.
void CodeCache::mark_scavenge_root_nmethods() {
FOR_ALL_ALIVE_BLOBS(cb) {
! if (cb->is_nmethod()) {
! nmethod *nm = (nmethod*)cb;
+ NMethodIterator iter;
! while(iter.next_alive()) {
! nmethod* nm = iter.method();
assert(nm->scavenge_root_not_marked(), "clean state");
if (nm->on_scavenge_root_list())
nm->set_scavenge_root_marked();
}
}
}
// If the closure is given, run it on the unlisted nmethods.
// Also make sure that the effects of mark_scavenge_root_nmethods is gone.
void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) {
FOR_ALL_ALIVE_BLOBS(cb) {
+ NMethodIterator iter;
+ while(iter.next_alive()) {
+ nmethod* nm = iter.method();
bool call_f = (f_or_null != NULL);
if (cb->is_nmethod()) {
nmethod *nm = (nmethod*)cb;
assert(nm->scavenge_root_not_marked(), "must be already processed");
if (nm->on_scavenge_root_list())
call_f = false; // don't show this one to the client
nm->verify_scavenge_root_oops();
} else {
call_f = false; // not an nmethod
}
if (call_f) f_or_null->do_code_blob(cb);
+ if (call_f) f_or_null->do_code_blob(nm);
}
}
#endif //PRODUCT
void CodeCache::verify_clean_inline_caches() {
#ifdef ASSERT
FOR_ALL_ALIVE_BLOBS(cb) {
! if (cb->is_nmethod()) {
! nmethod* nm = (nmethod*)cb;
+ NMethodIterator iter;
! while(iter.next_alive()) {
! nmethod* nm = iter.method();
assert(!nm->is_unloaded(), "Tautology");
nm->verify_clean_inline_caches();
nm->verify();
}
}
#endif
}
void CodeCache::verify_icholder_relocations() {
#ifdef ASSERT
// make sure that we aren't leaking icholders
int count = 0;
! FOR_ALL_BLOBS(cb) {
! FOR_ALL_HEAPS(heap) {
+ FOR_ALL_BLOBS(cb, *heap) {
if (cb->is_nmethod()) {
nmethod* nm = (nmethod*)cb;
count += nm->verify_icholder_relocations();
}
}
+ }
assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() ==
CompiledICHolder::live_count(), "must agree");
#endif
}
*** 513,573 ****
--- 693,804 ----
void CodeCache::gc_prologue() {
}
void CodeCache::gc_epilogue() {
assert_locked_or_safepoint(CodeCache_lock);
FOR_ALL_ALIVE_BLOBS(cb) {
! if (cb->is_nmethod()) {
! nmethod *nm = (nmethod*)cb;
+ NMethodIterator iter;
! while(iter.next_alive()) {
! nmethod* nm = iter.method();
assert(!nm->is_unloaded(), "Tautology");
if (needs_cache_clean()) {
nm->cleanup_inline_caches();
}
DEBUG_ONLY(nm->verify());
DEBUG_ONLY(nm->verify_oop_relocations());
}
}
set_needs_cache_clean(false);
prune_scavenge_root_nmethods();
verify_icholder_relocations();
}
void CodeCache::verify_oops() {
MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
VerifyOopClosure voc;
FOR_ALL_ALIVE_BLOBS(cb) {
! if (cb->is_nmethod()) {
! nmethod *nm = (nmethod*)cb;
+ NMethodIterator iter;
! while(iter.next_alive()) {
! nmethod* nm = iter.method();
nm->oops_do(&voc);
nm->verify_oop_relocations();
}
}
}
+ size_t CodeCache::capacity() {
+ size_t cap = 0;
+ FOR_ALL_HEAPS(heap) {
+ cap += (*heap)->capacity();
+ }
+ return cap;
+ }
! address CodeCache::first_address() {
! assert_locked_or_safepoint(CodeCache_lock);
return (address)_heap->low_boundary();
! size_t CodeCache::unallocated_capacity() {
! size_t unallocated_cap = 0;
+ FOR_ALL_HEAPS(heap) {
+ unallocated_cap += (*heap)->unallocated_capacity();
+ }
+ return unallocated_cap;
}
+ size_t CodeCache::max_capacity() {
+ size_t max_cap = 0;
+ FOR_ALL_HEAPS(heap) {
+ max_cap += (*heap)->max_capacity();
+ }
+ return max_cap;
+ }
address CodeCache::last_address() {
assert_locked_or_safepoint(CodeCache_lock);
return (address)_heap->high();
+ /**
+ * Returns true if a CodeHeap is full and sets code_blob_type accordingly.
+ */
+ bool CodeCache::is_full(int* code_blob_type) {
+ FOR_ALL_HEAPS(heap) {
+ if ((*heap)->unallocated_capacity() < CodeCacheMinimumFreeSpace) {
+ *code_blob_type = (*heap)->code_blob_type();
+ return true;
+ }
+ }
+ return false;
}
/**
! * Returns the reverse free ratio. E.g., if 25% (1/4) of the code cache
! * Returns the reverse free ratio. E.g., if 25% (1/4) of the code heap
* is free, reverse_free_ratio() returns 4.
*/
! double CodeCache::reverse_free_ratio(int code_blob_type) {
! double unallocated_capacity = (double)(CodeCache::unallocated_capacity() - CodeCacheMinimumFreeSpace);
double max_capacity = (double)CodeCache::max_capacity();
! CodeHeap* heap = get_code_heap(code_blob_type);
+ if (heap == NULL) {
+ return 0;
+ }
+ double unallocated_capacity = (double)(heap->unallocated_capacity() - CodeCacheMinimumFreeSpace);
+ double max_capacity = (double)heap->max_capacity();
return max_capacity / unallocated_capacity;
}
+ size_t CodeCache::bytes_allocated_in_freelists() {
+ size_t allocated_bytes = 0;
+ FOR_ALL_HEAPS(heap) {
+ allocated_bytes += (*heap)->allocated_in_freelist();
+ }
+ return allocated_bytes;
+ }
+
+ int CodeCache::allocated_segments() {
+ int number_of_segments = 0;
+ FOR_ALL_HEAPS(heap) {
+ number_of_segments += (*heap)->allocated_segments();
+ }
+ return number_of_segments;
+ }
+
+ size_t CodeCache::freelists_length() {
+ size_t length = 0;
+ FOR_ALL_HEAPS(heap) {
+ length += (*heap)->freelist_length();
+ }
+ return length;
+ }
+
void icache_init();
void CodeCache::initialize() {
assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points");
#ifdef COMPILER2
*** 576,604 ****
--- 807,836 ----
assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants");
// This was originally just a check of the alignment, causing failure, instead, round
// the code cache to the page size. In particular, Solaris is moving to a larger
// default page size.
CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size());
InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size());
ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size());
if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) {
vm_exit_during_initialization("Could not reserve enough space for code cache");
}
MemoryService::add_code_heap_memory_pool(_heap);
+ if (SegmentedCodeCache) {
+ // Use multiple code heaps
+ initialize_heaps();
+ } else {
+ // Use a single code heap
+ ReservedCodeSpace rs = reserve_heap_memory(ReservedCodeCacheSize);
+ add_heap(rs, "Code heap", InitialCodeCacheSize, CodeBlobType::All);
+ }
// Initialize ICache flush mechanism
// This service is needed for os::register_code_area
icache_init();
// Give OS a chance to register generated code area.
// This is used on Windows 64 bit platforms to register
// Structured Exception Handlers for our generated code.
! os::register_code_area(_heap->low_boundary(), _heap->high_boundary());
! os::register_code_area((char*)low_bound(), (char*)high_bound());
}
void codeCache_init() {
CodeCache::initialize();
}
//------------------------------------------------------------------------------------------------
*** 607,618 ****
--- 839,851 ----
return _number_of_nmethods_with_dependencies;
}
void CodeCache::clear_inline_caches() {
assert_locked_or_safepoint(CodeCache_lock);
FOR_ALL_ALIVE_NMETHODS(nm) {
nm->clear_inline_caches();
+ NMethodIterator iter;
+ while(iter.next_alive()) {
+ iter.method()->clear_inline_caches();
}
}
// Keeps track of time spent for checking dependencies
NOT_PRODUCT(static elapsedTimer dependentCheckTime;)
*** 663,673 ****
--- 896,908 ----
nm->mark_for_deoptimization();
number_of_marked_CodeBlobs++;
}
}
FOR_ALL_ALIVE_NMETHODS(nm) {
+ NMethodIterator iter;
+ while(iter.next_alive()) {
+ nmethod* nm = iter.method();
if (nm->is_marked_for_deoptimization()) {
// ...Already marked in the previous pass; don't count it again.
} else if (nm->is_evol_dependent_on(dependee())) {
ResourceMark rm;
nm->mark_for_deoptimization();
*** 684,704 ****
--- 919,941 ----
// Deoptimize all methods
void CodeCache::mark_all_nmethods_for_deoptimization() {
MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
FOR_ALL_ALIVE_NMETHODS(nm) {
nm->mark_for_deoptimization();
+ NMethodIterator iter;
+ while(iter.next_alive()) {
+ iter.method()->mark_for_deoptimization();
}
}
int CodeCache::mark_for_deoptimization(Method* dependee) {
MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
int number_of_marked_CodeBlobs = 0;
FOR_ALL_ALIVE_NMETHODS(nm) {
+ NMethodIterator iter;
+ while(iter.next_alive()) {
+ nmethod* nm = iter.method();
if (nm->is_dependent_on_method(dependee)) {
ResourceMark rm;
nm->mark_for_deoptimization();
number_of_marked_CodeBlobs++;
}
*** 707,717 ****
--- 944,956 ----
return number_of_marked_CodeBlobs;
}
void CodeCache::make_marked_nmethods_zombies() {
assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
FOR_ALL_ALIVE_NMETHODS(nm) {
+ NMethodIterator iter;
+ while(iter.next_alive()) {
+ nmethod* nm = iter.method();
if (nm->is_marked_for_deoptimization()) {
// If the nmethod has already been made non-entrant and it can be converted
// then zombie it now. Otherwise make it non-entrant and it will eventually
// be zombied when it is no longer seen on the stack. Note that the nmethod
*** 728,778 ****
--- 967,1053 ----
}
}
void CodeCache::make_marked_nmethods_not_entrant() {
assert_locked_or_safepoint(CodeCache_lock);
FOR_ALL_ALIVE_NMETHODS(nm) {
+ NMethodIterator iter;
+ while(iter.next_alive()) {
+ nmethod* nm = iter.method();
if (nm->is_marked_for_deoptimization()) {
nm->make_not_entrant();
}
}
}
void CodeCache::verify() {
! _heap->verify();
! FOR_ALL_ALIVE_BLOBS(p) {
! p->verify();
! assert_locked_or_safepoint(CodeCache_lock);
! FOR_ALL_HEAPS(heap) {
! (*heap)->verify();
+ FOR_ALL_BLOBS(cb, *heap) {
+ if (cb->is_alive()) {
+ cb->verify();
+ }
+ }
}
}
void CodeCache::report_codemem_full() {
+ // A CodeHeap is full. Print out warning and report event.
+ void CodeCache::report_codemem_full(int code_blob_type, bool print) {
+ // Get nmethod heap for the given CodeBlobType and build CodeCacheFull event
+ CodeHeap* heap = get_code_heap(SegmentedCodeCache ? code_blob_type : CodeBlobType::All);
+
+ if (!heap->was_full() || print) {
+ // Not yet reported for this heap, report
+ heap->report_full();
+ if (SegmentedCodeCache) {
+ warning("CodeHeap for %s is full. Compiler has been disabled.", CodeCache::get_code_heap_name(code_blob_type));
+ warning("Try increasing the code heap size using -XX:%s=",
+ (code_blob_type == CodeBlobType::MethodNonProfiled) ? "NonProfiledCodeHeapSize" : "ProfiledCodeHeapSize");
+ } else {
+ warning("CodeCache is full. Compiler has been disabled.");
+ warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
+ }
+ ResourceMark rm;
+ stringStream s;
+ // Dump code cache into a buffer before locking the tty,
+ {
+ MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
+ print_summary(&s);
+ }
+ ttyLocker ttyl;
+ tty->print("%s", s.as_string());
+ }
+
_codemem_full_count++;
EventCodeCacheFull event;
if (event.should_commit()) {
! event.set_startAddress((u8)low_bound());
! event.set_commitedTopAddress((u8)high());
! event.set_reservedTopAddress((u8)high_bound());
! event.set_codeBlobType((u1)code_blob_type);
! event.set_startAddress((u8)heap->low_boundary());
! event.set_commitedTopAddress((u8)heap->high());
+ event.set_reservedTopAddress((u8)heap->high_boundary());
event.set_entryCount(nof_blobs());
event.set_methodCount(nof_nmethods());
event.set_adaptorCount(nof_adapters());
! event.set_unallocatedCapacity(heap->unallocated_capacity()/K);
event.set_fullCount(_codemem_full_count);
event.commit();
}
}
void CodeCache::print_memory_overhead() {
size_t wasted_bytes = 0;
CodeBlob *cb;
for (cb = first(); cb != NULL; cb = next(cb)) {
+ FOR_ALL_HEAPS(heap) {
+ CodeHeap* curr_heap = *heap;
+ for (CodeBlob* cb = (CodeBlob*)curr_heap->first(); cb != NULL; cb = (CodeBlob*)curr_heap->next(cb)) {
HeapBlock* heap_block = ((HeapBlock*)cb) - 1;
wasted_bytes += heap_block->length() * CodeCacheSegmentSize - cb->size();
}
+ }
// Print bytes that are allocated in the freelist
ttyLocker ttl;
! tty->print_cr("Number of elements in freelist: " SSIZE_FORMAT, freelist_length());
! tty->print_cr("Allocated in freelist: " SSIZE_FORMAT "kB", bytes_allocated_in_freelist
*** 803,814 ****
--- 1078,1093 ----
int nmethodJava = 0;
int nmethodNative = 0;
int max_nm_size = 0;
ResourceMark rm;
! CodeBlob *cb;
! for (cb = first(); cb != NULL; cb = next(cb)) {
! int i = 0;
! FOR_ALL_HEAPS(heap) {
+ if (SegmentedCodeCache && Verbose) {
+ tty->print_cr("-- Code heap '%s' --", (*heap)->name());
+ }
+ FOR_ALL_BLOBS(cb, *heap) {
total++;
if (cb->is_nmethod()) {
nmethod* nm = (nmethod*)cb;
if (Verbose && nm->method() != NULL) {
*** 842,865 ****
--- 1121,1144 ----
adapterCount++;
} else if (cb->is_buffer_blob()) {
bufferBlobCount++;
}
}
+ }
int bucketSize = 512;
int bucketLimit = max_nm_size / bucketSize + 1;
int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit, mtCode);
memset(buckets, 0, sizeof(int) * bucketLimit);
for (cb = first(); cb != NULL; cb = next(cb)) {
! if (cb->is_nmethod()) {
! nmethod* nm = (nmethod*)cb;
! if(nm->is_java_method()) {
+ NMethodIterator iter;
! while(iter.next()) {
! nmethod* nm = iter.method();
! if(nm->method() != NULL && nm->is_java_method()) {
buckets[nm->size() / bucketSize]++;
}
}
}
tty->print_cr("Code Cache Entries (total of %d)",total);
tty->print_cr("-------------------------------------------------");
tty->print_cr("nmethods: %d",nmethodCount);
tty->print_cr("\talive: %d",nmethodAlive);
*** 897,911 ****
--- 1176,1192 ----
if (!Verbose) return;
CodeBlob_sizes live;
CodeBlob_sizes dead;
! FOR_ALL_BLOBS(p) {
! if (!p->is_alive()) {
dead.add(p);
! FOR_ALL_HEAPS(heap) {
! FOR_ALL_BLOBS(cb, *heap) {
+ if (!cb->is_alive()) {
+ dead.add(cb);
} else {
! live.add(p);
! live.add(cb);
+ }
}
}
tty->print_cr("CodeCache:");
tty->print_cr("nmethod dependency checking time %fs", dependentCheckTime.seconds());
*** 915,942 ****
--- 1196,1224 ----
}
if (!dead.is_empty()) {
dead.print("dead");
}
if (WizardMode) {
// print the oop_map usage
int code_size = 0;
int number_of_blobs = 0;
int number_of_oop_maps = 0;
int map_size = 0;
! FOR_ALL_BLOBS(p) {
! if (p->is_alive()) {
! FOR_ALL_HEAPS(heap) {
! FOR_ALL_BLOBS(cb, *heap) {
+ if (cb->is_alive()) {
number_of_blobs++;
! code_size += p->code_size();
! OopMapSet* set = p->oop_maps();
! code_size += cb->code_size();
! OopMapSet* set = cb->oop_maps();
if (set != NULL) {
number_of_oop_maps += set->size();
map_size += set->heap_size();
}
}
}
+ }
tty->print_cr("OopMaps");
tty->print_cr(" #blobs = %d", number_of_blobs);
tty->print_cr(" code size = %d", code_size);
tty->print_cr(" #oop_maps = %d", number_of_oop_maps);
tty->print_cr(" map size = %d", map_size);
*** 944,964 ****
--- 1226,1257 ----
#endif // !PRODUCT
}
void CodeCache::print_summary(outputStream* st, bool detailed) {
size_t total = (_heap->high_boundary() - _heap->low_boundary());
st->print_cr("CodeCache: size=" SIZE_FORMAT "Kb used=" SIZE_FORMAT
+ FOR_ALL_HEAPS(heap_iterator) {
+ CodeHeap* heap = (*heap_iterator);
+ size_t total = (heap->high_boundary() - heap->low_boundary());
+ if (SegmentedCodeCache) {
+ st->print("CodeHeap '%s':", heap->name());
+ } else {
+ st->print("CodeCache:");
+ }
+ st->print_cr(" size=" SIZE_FORMAT "Kb used=" SIZE_FORMAT
"Kb max_used=" SIZE_FORMAT "Kb free=" SIZE_FORMAT "Kb",
! total/K, (total - heap->unallocated_capacity())/K,
! maxCodeCacheUsed/K, unallocated_capacity()/K);
! heap->max_allocated_capacity()/K, heap->unallocated_capacity()/K);
if (detailed) {
st->print_cr(" bounds [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT "]",
! p2i(_heap->low_boundary()),
! p2i(_heap->high()),
! p2i(_heap->high_boundary()));
! p2i(heap->low_boundary()),
! p2i(heap->high()),
! p2i(heap->high_boundary()));
+ }
+ }
+
+ if (detailed) {
st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT
" adapters=" UINT32_FORMAT,
nof_blobs(), nof_nmethods(), nof_adapters());
st->print_cr(" compilation: %s", CompileBroker::should_compile_new_jobs() ?
"enabled" : Arguments::mode() == Arguments::_int ?
*** 971,976 ****
--- 1264,1268 ----
st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'"
" adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'",
nof_blobs(), nof_nmethods(), nof_adapters(),
unallocated_capacity());
}
src/share/vm/code/codeCache.cpp
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