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hotspot/src/share/vm/classfile/javaClasses.inline.hpp
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@@ -71,6 +71,69 @@
inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
return obj != NULL && is_subclass(obj->klass());
}
+inline int BackTrace::merge_bci_and_version(int bci, int version) {
+ // only store u2 for version, checking for overflow.
+ if (version > USHRT_MAX || version < 0) version = USHRT_MAX;
+ assert((jushort)bci == bci, "bci should be short");
+ return build_int_from_shorts(version, bci);
+}
+
+inline int BackTrace::merge_mid_and_cpref(int mid, int cpref) {
+ // only store u2 for mid and cpref, checking for overflow.
+ assert((jushort)mid == mid, "mid should be short");
+ assert((jushort)cpref == cpref, "cpref should be short");
+ return build_int_from_shorts(cpref, mid);
+}
+
+inline int BackTrace::bci_at(unsigned int merged) {
+ return extract_high_short_from_int(merged);
+}
+
+inline int BackTrace::version_at(unsigned int merged) {
+ return extract_low_short_from_int(merged);
+}
+
+inline int BackTrace::mid_at(unsigned int merged) {
+ return extract_high_short_from_int(merged);
+}
+
+inline int BackTrace::cpref_at(unsigned int merged) {
+ return extract_low_short_from_int(merged);
+}
+
+inline int BackTrace::get_line_number(const methodHandle& 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;
+}
+
+/*
+ * Returns the source file name of a given InstanceKlass and version
+ */
+inline Symbol* BackTrace::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);
+}
+
#endif // SHARE_VM_CLASSFILE_JAVACLASSES_INLINE_HPP
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