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src/hotspot/share/code/codeHeapState.cpp
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@@ -2048,20 +2048,14 @@
}
}
}
-#define JDK8200450_REMEDY
-#define JDK8200450_TRACE
void CodeHeapState::print_names(outputStream* out, CodeHeap* heap) {
if (!initialization_complete) {
return;
}
-#ifdef JDK8200450_TRACE
- out->print_cr("print_names() entered for heap @ " INTPTR_FORMAT, p2i(heap));
- out->flush();
-#endif
const char* heapName = get_heapName(heap);
get_HeapStatGlobals(out, heapName);
if ((StatArray == NULL) || (alloc_granules == 0)) {
@@ -2103,61 +2097,36 @@
STRINGSTREAM_FLUSH_LOCKED("")
}
// Only check granule if it contains at least one blob.
unsigned int nBlobs = StatArray[ix].t1_count + StatArray[ix].t2_count + StatArray[ix].tx_count +
StatArray[ix].stub_count + StatArray[ix].dead_count;
-#ifdef JDK8200450_REMEDY
- if (nBlobs > 0 )
-#endif
- {
+ if (nBlobs > 0 ) {
for (unsigned int is = 0; is < granule_size; is+=(unsigned int)seg_size) {
// heap->find_start() is safe. Only working with _segmap. Returns NULL or void*. Returned CodeBlob may be uninitialized.
CodeBlob* this_blob = (CodeBlob *)(heap->find_start(low_bound+ix*granule_size+is));
-#ifndef JDK8200450_REMEDY
- bool blob_initialized = (this_blob != NULL)
-#else
-#ifndef JDK8200450_TRACE
bool blob_initialized = (this_blob != NULL) && (this_blob->header_size() >= 0) && (this_blob->relocation_size() >= 0) &&
((address)this_blob + this_blob->header_size() == (address)(this_blob->relocation_begin())) &&
- ((address)this_blob + CodeBlob::align_code_offset(this_blob->header_size() + this_blob->relocation_size()) == (address)(this_blob->content_begin()) &&
- is_readable_pointer((address)(this_blob->relocation_begin()) &&
+ ((address)this_blob + CodeBlob::align_code_offset(this_blob->header_size() + this_blob->relocation_size()) == (address)(this_blob->content_begin())) &&
+ is_readable_pointer((address)(this_blob->relocation_begin())) &&
is_readable_pointer(this_blob->content_begin());
-#else
- int hdr_size = 0;
- int reloc_size = 0;
- address reloc_begin = NULL;
- address cntnt_begin = NULL;
- if (this_blob != NULL) {
- hdr_size = this_blob->header_size();
- reloc_size = this_blob->relocation_size();
- reloc_begin = (address)(this_blob->relocation_begin());
- cntnt_begin = this_blob->content_begin();
- }
- bool blob_initialized = (this_blob != NULL) && (hdr_size >= 0) && (reloc_size >= 0) &&
- ((address)this_blob + hdr_size == reloc_begin) &&
- ((address)this_blob + CodeBlob::align_code_offset(hdr_size + reloc_size) == cntnt_begin) &&
- is_readable_pointer(reloc_begin) &&
- is_readable_pointer(cntnt_begin);
-#endif
-#endif
- if (blob_initialized && (this_blob != last_blob)) {
+ // blob could have been flushed, freed, and merged.
+ // this_blob < last_blob is an indicator for that.
+ if (blob_initialized && (this_blob > last_blob)) {
last_blob = this_blob;
//---< get type and name >---
blobType cbType = noType;
if (segment_granules) {
cbType = (blobType)StatArray[ix].type;
} else {
- cbType = get_cbType(this_blob); // Is this here safe?
+ cbType = get_cbType(this_blob);
}
- // this_blob->name() could return NULL if no name is given to CTOR. Inlined, maybe invisible on stack
+ // this_blob->name() could return NULL if no name was given to CTOR. Inlined, maybe invisible on stack
const char* blob_name = this_blob->name();
-#ifdef JDK8200450_REMEDY
- if (blob_name == NULL) {
+ if ((blob_name == NULL) || !is_readable_pointer(blob_name)) {
blob_name = "<unavailable>";
}
-#endif
//---< print table header for new print range >---
if (!name_in_addr_range) {
name_in_addr_range = true;
ast->fill_to(51);
@@ -2172,28 +2141,20 @@
ast->print(INTPTR_FORMAT, p2i(this_blob));
ast->fill_to(19);
ast->print("(+" PTR32_FORMAT ")", (unsigned int)((char*)this_blob-low_bound));
ast->fill_to(33);
-#ifdef JDK8200450_TRACE
- STRINGSTREAM_FLUSH_LOCKED("") // Remove before push!!!
-#endif
-
// this_blob->as_nmethod_or_null() is safe. Inlined, maybe invisible on stack.
nmethod* nm = this_blob->as_nmethod_or_null();
Method* method = (nm == NULL) ? NULL : nm->method(); // may be uninitialized, i.e. != NULL, but invalid
-#ifdef JDK8200450_REMEDY
- if ((nm != NULL) && (method != NULL) && is_readable_pointer(method) && is_readable_pointer(method->constants())) {
-#else
- if ((nm != NULL) && (method != NULL)) {
-#endif
+ if ((nm != NULL) && (method != NULL) && (cbType != nMethod_dead) &&
+ is_readable_pointer(method) && is_readable_pointer(method->constants())) {
ResourceMark rm;
//---< collect all data to locals as quickly as possible >---
unsigned int total_size = nm->total_size();
int hotness = nm->hotness_counter();
- bool nm_zombie = nm->is_zombie();
- bool get_name = nm->is_in_use() || nm->is_not_entrant();
+ bool get_name = (cbType == nMethod_inuse) || (cbType == nMethod_notused);
//---< nMethod size in hex >---
ast->print(PTR32_FORMAT, total_size);
ast->print("(" SIZE_FORMAT_W(4) "K)", total_size/K);
//---< compiler information >---
ast->fill_to(51);
@@ -2203,81 +2164,36 @@
ast->print("%5d", hotness);
//---< name and signature >---
ast->fill_to(62+6);
ast->print("%s", blobTypeName[cbType]);
ast->fill_to(82+6);
- if (nm_zombie) {
+ if (cbType == nMethod_dead) {
ast->print("%14s", " zombie method");
}
-#ifdef JDK8200450_TRACE
- STRINGSTREAM_FLUSH_LOCKED("") // Remove before push!!!
-#endif
-
if (get_name) {
-#ifdef JDK8200450_REMEDY
Symbol* methName = method->name();
const char* methNameS = (methName == NULL) ? NULL : methName->as_C_string();
methNameS = (methNameS == NULL) ? "<method name unavailable>" : methNameS;
Symbol* methSig = method->signature();
const char* methSigS = (methSig == NULL) ? NULL : methSig->as_C_string();
methSigS = (methSigS == NULL) ? "<method signature unavailable>" : methSigS;
ast->print("%s", methNameS);
ast->print("%s", methSigS);
-#else
- blob_name = method->name_and_sig_as_C_string();
- ast->print("%s", blob_name);
-#endif
} else {
ast->print("%s", blob_name);
}
} else {
ast->fill_to(62+6);
ast->print("%s", blobTypeName[cbType]);
ast->fill_to(82+6);
ast->print("%s", blob_name);
}
STRINGSTREAM_FLUSH_LOCKED("\n")
-#ifdef JDK8200450_TRACE
- if ((nm != NULL) && (method != NULL) && !(is_readable_pointer(method) && is_readable_pointer(method->constants()))) {
- ast->print("Potential CodeHeap State Analytics issue found.\n");
- if (is_readable_pointer(method)) {
- ast->print(" Issue would have been detected by is_readable_pointer(" INTPTR_FORMAT "(method->constants())) check.\n", p2i(method->constants()));
- } else {
- ast->print(" Issue would have been detected by is_readable_pointer(" INTPTR_FORMAT "(method)) check.\n", p2i(method));
- }
- STRINGSTREAM_FLUSH_LOCKED("\n")
- }
-#endif
} else if (!blob_initialized && (this_blob != last_blob) && (this_blob != NULL)) {
last_blob = this_blob;
-#ifdef JDK8200450_TRACE
- ast->print("Potential CodeHeap State Analytics issue found.\n");
- if (nBlobs == 0) {
- ast->print(" Issue would have been detected by (nBlobs > 0) check.\n");
- } else {
- if (!((address)this_blob + hdr_size == reloc_begin)) {
- ast->print(" Issue would have been detected by (this(" INTPTR_FORMAT ") + header(%d) == relocation_begin(" INTPTR_FORMAT ")) check.\n", p2i(this_blob), hdr_size, p2i(reloc_begin));
- }
- if (!((address)this_blob + CodeBlob::align_code_offset(hdr_size + reloc_size) == cntnt_begin)) {
- ast->print(" Issue would have been detected by (this(" INTPTR_FORMAT ") + header(%d) + relocation(%d) == content_begin(" INTPTR_FORMAT ")) check.\n", p2i(this_blob), hdr_size, reloc_size, p2i(cntnt_begin));
- }
- if (hdr_size != this_blob->header_size()) {
- ast->print(" header_size meanwhile changed from %d to %d\n", hdr_size, this_blob->header_size());
- }
- if (reloc_size != this_blob->relocation_size()) {
- ast->print(" relocation_size meanwhile changed from %d to %d\n", reloc_size, this_blob->relocation_size());
- }
- if (reloc_begin != (address)(this_blob->relocation_begin())) {
- ast->print(" relocation_begin meanwhile changed from " INTPTR_FORMAT " to " INTPTR_FORMAT "\n", p2i(reloc_begin), p2i(this_blob->relocation_begin()));
- }
- if (cntnt_begin != this_blob->content_begin()) {
- ast->print(" relocation_begin meanwhile changed from " INTPTR_FORMAT " to " INTPTR_FORMAT "\n", p2i(cntnt_begin), p2i(this_blob->content_begin()));
- }
- }
STRINGSTREAM_FLUSH_LOCKED("\n")
-#endif
}
}
} // nBlobs > 0
}
STRINGSTREAM_FLUSH_LOCKED("\n\n")
@@ -2428,27 +2344,27 @@
ast->print("(+" PTR32_FORMAT "): |", (unsigned int)(ix*granule_size));
}
}
CodeHeapState::blobType CodeHeapState::get_cbType(CodeBlob* cb) {
- if (cb != NULL ) {
+ if ((cb != NULL) && is_readable_pointer(cb)) {
if (cb->is_runtime_stub()) return runtimeStub;
if (cb->is_deoptimization_stub()) return deoptimizationStub;
if (cb->is_uncommon_trap_stub()) return uncommonTrapStub;
if (cb->is_exception_stub()) return exceptionStub;
if (cb->is_safepoint_stub()) return safepointStub;
if (cb->is_adapter_blob()) return adapterBlob;
if (cb->is_method_handles_adapter_blob()) return mh_adapterBlob;
if (cb->is_buffer_blob()) return bufferBlob;
- if (cb->is_nmethod() ) {
- if (((nmethod*)cb)->is_in_use()) return nMethod_inuse;
- if (((nmethod*)cb)->is_alive() && !(((nmethod*)cb)->is_not_entrant())) return nMethod_notused;
- if (((nmethod*)cb)->is_alive()) return nMethod_alive;
- if (((nmethod*)cb)->is_unloaded()) return nMethod_unloaded;
- if (((nmethod*)cb)->is_zombie()) return nMethod_dead;
- tty->print_cr("unhandled nmethod state");
+ nmethod* nm = cb->as_nmethod_or_null();
+ if (nm != NULL) { // no is_readable check required, nm = (nmethod*)cb.
+ if (nm->is_zombie()) return nMethod_dead;
+ if (nm->is_unloaded()) return nMethod_unloaded;
+ if (nm->is_alive() && !(nm->is_not_entrant())) return nMethod_notused;
+ if (nm->is_alive()) return nMethod_alive;
+ if (nm->is_in_use()) return nMethod_inuse;
return nMethod_dead;
}
}
return noType;
}
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