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8140450: Implement JEP 259: Stack-Walking API

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Co-authored-by: Brent Christian <brent.christian@oracle.com>
Co-authored-by: Daniel Fuchs <daniel.fuchs@oracle.com>
Co-authored-by: Hamlin Li <huaming.li@oracle.com>
Reviewed-by: coleenp, dfuchs, bchristi, psandoz, sspitsyn
This commit is contained in:
Mandy Chung 2015-11-23 12:44:43 -08:00
parent 961fbacd76
commit bf9af24b55
14 changed files with 1080 additions and 58 deletions
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224
hotspot/src/share/vm/classfile/javaClasses.cpp
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@ -1518,43 +1518,11 @@ void java_lang_Throwable::print(Handle throwable, outputStream* st) {
// After this many redefines, the stack trace is unreliable.
const int MAX_VERSION = USHRT_MAX;
// Helper backtrace functions to store bci|version together.
static inline int merge_bci_and_version(int bci, int version) {
// only store u2 for version, checking for overflow.
if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
assert((jushort)bci == bci, "bci should be short");
return build_int_from_shorts(version, bci);
}
static inline int bci_at(unsigned int merged) {
return extract_high_short_from_int(merged);
}
static inline int version_at(unsigned int merged) {
return extract_low_short_from_int(merged);
}
static inline bool version_matches(Method* method, int version) {
assert(version < MAX_VERSION, "version is too big");
return method != NULL && (method->constants()->version() == version);
}
static inline int get_line_number(Method* method, int bci) {
int line_number = 0;
if (method->is_native()) {
// Negative value different from -1 below, enabling Java code in
// class java.lang.StackTraceElement to distinguish "native" from
// "no LineNumberTable". JDK tests for -2.
line_number = -2;
} else {
// Returns -1 if no LineNumberTable, and otherwise actual line number
line_number = method->line_number_from_bci(bci);
if (line_number == -1 && ShowHiddenFrames) {
line_number = bci + 1000000;
}
}
return line_number;
}
// This class provides a simple wrapper over the internal structure of
// exception backtrace to insulate users of the backtrace from needing
// to know what it looks like.
@ -1676,7 +1644,7 @@ class BacktraceBuilder: public StackObj {
}
_methods->short_at_put(_index, method->orig_method_idnum());
_bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
_bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
_cprefs->short_at_put(_index, method->name_index());
// We need to save the mirrors in the backtrace to keep the class
@ -1688,19 +1656,6 @@ class BacktraceBuilder: public StackObj {
};
Symbol* get_source_file_name(InstanceKlass* holder, int version) {
// Find the specific ik version that contains this source_file_name_index
// via the previous versions list, but use the current version's
// constant pool to look it up. The previous version's index has been
// merged for the current constant pool.
InstanceKlass* ik = holder->get_klass_version(version);
// This version has been cleaned up.
if (ik == NULL) return NULL;
int source_file_name_index = ik->source_file_name_index();
return (source_file_name_index == 0) ?
(Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index);
}
// Print stack trace element to resource allocated buffer
char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
int method_id, int version, int bci, int cpref) {
@ -1718,7 +1673,7 @@ char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
buf_len += (int)strlen(method_name);
char* source_file_name = NULL;
Symbol* source = get_source_file_name(holder, version);
Symbol* source = Backtrace::get_source_file_name(holder, version);
if (source != NULL) {
source_file_name = source->as_C_string();
buf_len += (int)strlen(source_file_name);
@ -1733,7 +1688,7 @@ char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
if (!version_matches(method, version)) {
strcat(buf, "(Redefined)");
} else {
int line_number = get_line_number(method, bci);
int line_number = Backtrace::get_line_number(method, bci);
if (line_number == -2) {
strcat(buf, "(Native Method)");
} else {
@ -1802,8 +1757,8 @@ void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
// NULL mirror means end of stack trace
if (mirror.is_null()) goto handle_cause;
int method = methods->short_at(index);
int version = version_at(bcis->int_at(index));
int bci = bci_at(bcis->int_at(index));
int version = Backtrace::version_at(bcis->int_at(index));
int bci = Backtrace::bci_at(bcis->int_at(index));
int cpref = cprefs->short_at(index);
print_stack_element(st, mirror, method, version, bci, cpref);
}
@ -2090,8 +2045,8 @@ oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS
assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
int method = methods->short_at(chunk_index);
int version = version_at(bcis->int_at(chunk_index));
int bci = bci_at(bcis->int_at(chunk_index));
int version = Backtrace::version_at(bcis->int_at(chunk_index));
int bci = Backtrace::bci_at(bcis->int_at(chunk_index));
int cpref = cprefs->short_at(chunk_index);
Handle mirror(THREAD, mirrors->obj_at(chunk_index));
@ -2114,6 +2069,7 @@ oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
}
Handle element = ik->allocate_instance_handle(CHECK_0);
// Fill in class name
ResourceMark rm(THREAD);
InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
@ -2136,13 +2092,13 @@ oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
java_lang_StackTraceElement::set_lineNumber(element(), -1);
} else {
// Fill in source file name and line number.
Symbol* source = get_source_file_name(holder, version);
Symbol* source = Backtrace::get_source_file_name(holder, version);
if (ShowHiddenFrames && source == NULL)
source = vmSymbols::unknown_class_name();
oop filename = StringTable::intern(source, CHECK_0);
java_lang_StackTraceElement::set_fileName(element(), filename);
int line_number = get_line_number(method, bci);
int line_number = Backtrace::get_line_number(method, bci);
java_lang_StackTraceElement::set_lineNumber(element(), line_number);
}
return element();
@ -2155,6 +2111,108 @@ oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRA
return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
}
Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
if (MemberNameInStackFrame) {
Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
// we should expand MemberName::name when Throwable uses StackTrace
// MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
return method;
} else {
short mid = stackFrame->short_field(_mid_offset);
short version = stackFrame->short_field(_version_offset);
return holder->method_with_orig_idnum(mid, version);
}
}
Symbol* java_lang_StackFrameInfo::get_file_name(Handle stackFrame, InstanceKlass* holder) {
if (MemberNameInStackFrame) {
return holder->source_file_name();
} else {
short version = stackFrame->short_field(_version_offset);
return Backtrace::get_source_file_name(holder, version);
}
}
void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci) {
// set Method* or mid/cpref
if (MemberNameInStackFrame) {
oop mname = stackFrame->obj_field(_memberName_offset);
InstanceKlass* ik = method->method_holder();
CallInfo info(method(), ik);
MethodHandles::init_method_MemberName(mname, info);
} else {
int mid = method->orig_method_idnum();
int cpref = method->name_index();
assert((jushort)mid == mid, "mid should be short");
assert((jushort)cpref == cpref, "cpref should be short");
java_lang_StackFrameInfo::set_mid(stackFrame(), (short)mid);
java_lang_StackFrameInfo::set_cpref(stackFrame(), (short)cpref);
}
// set bci
java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
// method may be redefined; store the version
int version = method->constants()->version();
assert((jushort)version == version, "version should be short");
java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
}
void java_lang_StackFrameInfo::fill_methodInfo(Handle stackFrame, TRAPS) {
ResourceMark rm(THREAD);
oop k = stackFrame->obj_field(_declaringClass_offset);
InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k));
Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
int bci = stackFrame->int_field(_bci_offset);
// The method can be NULL if the requested class version is gone
Symbol* sym = (method != NULL) ? method->name() : NULL;
if (MemberNameInStackFrame) {
assert(sym != NULL, "MemberName must have method name");
} else {
// The method can be NULL if the requested class version is gone
if (sym == NULL) {
short cpref = stackFrame->short_field(_cpref_offset);
sym = holder->constants()->symbol_at(cpref);
}
}
// set method name
oop methodname = StringTable::intern(sym, CHECK);
java_lang_StackFrameInfo::set_methodName(stackFrame(), methodname);
// set file name and line number
Symbol* source = get_file_name(stackFrame, holder);
if (source != NULL) {
oop filename = StringTable::intern(source, CHECK);
java_lang_StackFrameInfo::set_fileName(stackFrame(), filename);
}
// if the method has been redefined, the bci is no longer applicable
short version = stackFrame->short_field(_version_offset);
if (version_matches(method, version)) {
int line_number = Backtrace::get_line_number(method, bci);
java_lang_StackFrameInfo::set_lineNumber(stackFrame(), line_number);
}
}
void java_lang_StackFrameInfo::compute_offsets() {
Klass* k = SystemDictionary::StackFrameInfo_klass();
compute_offset(_declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature());
compute_offset(_memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature());
compute_offset(_bci_offset, k, vmSymbols::bci_name(), vmSymbols::int_signature());
compute_offset(_methodName_offset, k, vmSymbols::methodName_name(), vmSymbols::string_signature());
compute_offset(_fileName_offset, k, vmSymbols::fileName_name(), vmSymbols::string_signature());
compute_offset(_lineNumber_offset, k, vmSymbols::lineNumber_name(), vmSymbols::int_signature());
STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
}
void java_lang_LiveStackFrameInfo::compute_offsets() {
Klass* k = SystemDictionary::LiveStackFrameInfo_klass();
compute_offset(_monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature());
compute_offset(_locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature());
compute_offset(_operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature());
}
void java_lang_reflect_AccessibleObject::compute_offsets() {
Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
@ -3471,6 +3529,18 @@ int java_lang_StackTraceElement::declaringClass_offset;
int java_lang_StackTraceElement::methodName_offset;
int java_lang_StackTraceElement::fileName_offset;
int java_lang_StackTraceElement::lineNumber_offset;
int java_lang_StackFrameInfo::_declaringClass_offset;
int java_lang_StackFrameInfo::_memberName_offset;
int java_lang_StackFrameInfo::_bci_offset;
int java_lang_StackFrameInfo::_methodName_offset;
int java_lang_StackFrameInfo::_fileName_offset;
int java_lang_StackFrameInfo::_lineNumber_offset;
int java_lang_StackFrameInfo::_mid_offset;
int java_lang_StackFrameInfo::_version_offset;
int java_lang_StackFrameInfo::_cpref_offset;
int java_lang_LiveStackFrameInfo::_monitors_offset;
int java_lang_LiveStackFrameInfo::_locals_offset;
int java_lang_LiveStackFrameInfo::_operands_offset;
int java_lang_AssertionStatusDirectives::classes_offset;
int java_lang_AssertionStatusDirectives::classEnabled_offset;
int java_lang_AssertionStatusDirectives::packages_offset;
@ -3500,6 +3570,50 @@ void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
element->int_field_put(lineNumber_offset, value);
}
// Support for java_lang_StackFrameInfo
void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) {
element->obj_field_put(_declaringClass_offset, value);
}
void java_lang_StackFrameInfo::set_mid(oop element, short value) {
element->short_field_put(_mid_offset, value);
}
void java_lang_StackFrameInfo::set_version(oop element, short value) {
element->short_field_put(_version_offset, value);
}
void java_lang_StackFrameInfo::set_cpref(oop element, short value) {
element->short_field_put(_cpref_offset, value);
}
void java_lang_StackFrameInfo::set_bci(oop element, int value) {
element->int_field_put(_bci_offset, value);
}
void java_lang_StackFrameInfo::set_fileName(oop element, oop value) {
element->obj_field_put(_fileName_offset, value);
}
void java_lang_StackFrameInfo::set_methodName(oop element, oop value) {
element->obj_field_put(_methodName_offset, value);
}
void java_lang_StackFrameInfo::set_lineNumber(oop element, int value) {
element->int_field_put(_lineNumber_offset, value);
}
void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
element->obj_field_put(_monitors_offset, value);
}
void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
element->obj_field_put(_locals_offset, value);
}
void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
element->obj_field_put(_operands_offset, value);
}
// Support for java Assertions - java_lang_AssertionStatusDirectives.
@ -3633,6 +3747,8 @@ void JavaClasses::compute_offsets() {
sun_reflect_ConstantPool::compute_offsets();
sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
java_lang_reflect_Parameter::compute_offsets();
java_lang_StackFrameInfo::compute_offsets();
java_lang_LiveStackFrameInfo::compute_offsets();
// generated interpreter code wants to know about the offsets we just computed:
AbstractAssembler::update_delayed_values();