diff -r 8a4ef4e001d3 -r c7c777385a15 src/share/vm/compiler/disassembler.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/compiler/disassembler.cpp	Wed Apr 02 12:09:59 2008 -0700
@@ -0,0 +1,443 @@
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+# include "incls/_precompiled.incl"
+# include "incls/_disassembler.cpp.incl"
+
+void*       Disassembler::_library               = NULL;
+bool        Disassembler::_tried_to_load_library = false;
+
+// This routine is in the shared library:
+Disassembler::decode_func Disassembler::_decode_instructions = NULL;
+
+static const char hsdis_library_name[] = "hsdis-"HOTSPOT_LIB_ARCH;
+static const char decode_instructions_name[] = "decode_instructions";
+
+#define COMMENT_COLUMN  40 LP64_ONLY(+8) /*could be an option*/
+#define BYTES_COMMENT   ";..."  /* funky byte display comment */
+
+bool Disassembler::load_library() {
+  if (_decode_instructions != NULL) {
+    // Already succeeded.
+    return true;
+  }
+  if (_tried_to_load_library) {
+    // Do not try twice.
+    // To force retry in debugger: assign _tried_to_load_library=0
+    return false;
+  }
+  // Try to load it.
+  char ebuf[1024];
+  char buf[JVM_MAXPATHLEN];
+  os::jvm_path(buf, sizeof(buf));
+  int jvm_offset = -1;
+  {
+    // Match "jvm[^/]*" in jvm_path.
+    const char* base = buf;
+    const char* p = strrchr(buf, '/');
+    p = strstr(p ? p : base, "jvm");
+    if (p != NULL)  jvm_offset = p - base;
+  }
+  if (jvm_offset >= 0) {
+    // Find the disassembler next to libjvm.so.
+    strcpy(&buf[jvm_offset], hsdis_library_name);
+    strcat(&buf[jvm_offset], os::dll_file_extension());
+    _library = hpi::dll_load(buf, ebuf, sizeof ebuf);
+  }
+  if (_library == NULL) {
+    // Try a free-floating lookup.
+    strcpy(&buf[0], hsdis_library_name);
+    strcat(&buf[0], os::dll_file_extension());
+    _library = hpi::dll_load(buf, ebuf, sizeof ebuf);
+  }
+  if (_library != NULL) {
+    _decode_instructions = CAST_TO_FN_PTR(Disassembler::decode_func,
+                                          hpi::dll_lookup(_library, decode_instructions_name));
+  }
+  _tried_to_load_library = true;
+  if (_decode_instructions == NULL) {
+    tty->print_cr("Could not load %s; %s; %s", buf,
+                  ((_library != NULL)
+                   ? "entry point is missing"
+                   : (WizardMode || PrintMiscellaneous)
+                   ? (const char*)ebuf
+                   : "library not loadable"),
+                  "PrintAssembly is disabled");
+    return false;
+  }
+
+  // Success.
+  tty->print_cr("Loaded disassembler from %s", buf);
+  return true;
+}
+
+
+class decode_env {
+ private:
+  nmethod*      _nm;
+  CodeBlob*     _code;
+  outputStream* _output;
+  address       _start, _end;
+
+  char          _option_buf[512];
+  char          _print_raw;
+  bool          _print_pc;
+  bool          _print_bytes;
+  address       _cur_insn;
+  int           _total_ticks;
+  int           _bytes_per_line; // arch-specific formatting option
+
+  static bool match(const char* event, const char* tag) {
+    size_t taglen = strlen(tag);
+    if (strncmp(event, tag, taglen) != 0)
+      return false;
+    char delim = event[taglen];
+    return delim == '\0' || delim == ' ' || delim == '/' || delim == '=';
+  }
+
+  void collect_options(const char* p) {
+    if (p == NULL || p[0] == '\0')  return;
+    size_t opt_so_far = strlen(_option_buf);
+    if (opt_so_far + 1 + strlen(p) + 1 > sizeof(_option_buf))  return;
+    char* fillp = &_option_buf[opt_so_far];
+    if (opt_so_far > 0) *fillp++ = ',';
+    strcat(fillp, p);
+    // replace white space by commas:
+    char* q = fillp;
+    while ((q = strpbrk(q, " \t\n")) != NULL)
+      *q++ = ',';
+    // Note that multiple PrintAssemblyOptions flags accumulate with \n,
+    // which we want to be changed to a comma...
+  }
+
+  void print_insn_labels();
+  void print_insn_bytes(address pc0, address pc);
+  void print_address(address value);
+
+ public:
+  decode_env(CodeBlob* code, outputStream* output);
+
+  address decode_instructions(address start, address end);
+
+  void start_insn(address pc) {
+    _cur_insn = pc;
+    output()->bol();
+    print_insn_labels();
+  }
+
+  void end_insn(address pc) {
+    address pc0 = cur_insn();
+    outputStream* st = output();
+    if (_print_bytes && pc > pc0)
+      print_insn_bytes(pc0, pc);
+    if (_nm != NULL)
+      _nm->print_code_comment_on(st, COMMENT_COLUMN, pc0, pc);
+
+    // Output pc bucket ticks if we have any
+    if (total_ticks() != 0) {
+      address bucket_pc = FlatProfiler::bucket_start_for(pc);
+      if (bucket_pc != NULL && bucket_pc > pc0 && bucket_pc <= pc) {
+        int bucket_count = FlatProfiler::bucket_count_for(pc0);
+        if (bucket_count != 0) {
+          st->bol();
+          st->print_cr("%3.1f%% [%d]", bucket_count*100.0/total_ticks(), bucket_count);
+        }
+      }
+    }
+  }
+
+  address handle_event(const char* event, address arg);
+
+  outputStream* output() { return _output; }
+  address cur_insn() { return _cur_insn; }
+  int total_ticks() { return _total_ticks; }
+  void set_total_ticks(int n) { _total_ticks = n; }
+  const char* options() { return _option_buf; }
+};
+
+decode_env::decode_env(CodeBlob* code, outputStream* output) {
+  memset(this, 0, sizeof(*this));
+  _output = output ? output : tty;
+  _code = code;
+  if (code != NULL && code->is_nmethod())
+    _nm = (nmethod*) code;
+
+  // by default, output pc but not bytes:
+  _print_pc       = true;
+  _print_bytes    = false;
+  _bytes_per_line = Disassembler::pd_instruction_alignment();
+
+  // parse the global option string:
+  collect_options(Disassembler::pd_cpu_opts());
+  collect_options(PrintAssemblyOptions);
+
+  if (strstr(options(), "hsdis-")) {
+    if (strstr(options(), "hsdis-print-raw"))
+      _print_raw = (strstr(options(), "xml") ? 2 : 1);
+    if (strstr(options(), "hsdis-print-pc"))
+      _print_pc = !_print_pc;
+    if (strstr(options(), "hsdis-print-bytes"))
+      _print_bytes = !_print_bytes;
+  }
+  if (strstr(options(), "help")) {
+    tty->print_cr("PrintAssemblyOptions help:");
+    tty->print_cr("  hsdis-print-raw       test plugin by requesting raw output");
+    tty->print_cr("  hsdis-print-raw-xml   test plugin by requesting raw xml");
+    tty->print_cr("  hsdis-print-pc        turn off PC printing (on by default)");
+    tty->print_cr("  hsdis-print-bytes     turn on instruction byte output");
+    tty->print_cr("combined options: %s", options());
+  }
+}
+
+address decode_env::handle_event(const char* event, address arg) {
+  if (match(event, "insn")) {
+    start_insn(arg);
+  } else if (match(event, "/insn")) {
+    end_insn(arg);
+  } else if (match(event, "addr")) {
+    if (arg != NULL) {
+      print_address(arg);
+      return arg;
+    }
+  } else if (match(event, "mach")) {
+   output()->print_cr("[Disassembling for mach='%s']", arg);
+  } else if (match(event, "format bytes-per-line")) {
+    _bytes_per_line = (int) (intptr_t) arg;
+  } else {
+    // ignore unrecognized markup
+  }
+  return NULL;
+}
+
+// called by the disassembler to print out jump targets and data addresses
+void decode_env::print_address(address adr) {
+  outputStream* st = _output;
+
+  if (adr == NULL) {
+    st->print("NULL");
+    return;
+  }
+
+  int small_num = (int)(intptr_t)adr;
+  if ((intptr_t)adr == (intptr_t)small_num
+      && -1 <= small_num && small_num <= 9) {
+    st->print("%d", small_num);
+    return;
+  }
+
+  if (Universe::is_fully_initialized()) {
+    if (StubRoutines::contains(adr)) {
+      StubCodeDesc* desc = StubCodeDesc::desc_for(adr);
+      if (desc == NULL)
+        desc = StubCodeDesc::desc_for(adr + frame::pc_return_offset);
+      if (desc != NULL) {
+        st->print("Stub::%s", desc->name());
+        if (desc->begin() != adr)
+          st->print("%+d 0x%p",adr - desc->begin(), adr);
+        else if (WizardMode) st->print(" " INTPTR_FORMAT, adr);
+        return;
+      }
+      st->print("Stub::<unknown> " INTPTR_FORMAT, adr);
+      return;
+    }
+
+    BarrierSet* bs = Universe::heap()->barrier_set();
+    if (bs->kind() == BarrierSet::CardTableModRef &&
+        adr == (address)((CardTableModRefBS*)(bs))->byte_map_base) {
+      st->print("word_map_base");
+      if (WizardMode) st->print(" " INTPTR_FORMAT, (intptr_t)adr);
+      return;
+    }
+
+    oop obj;
+    if (_nm != NULL
+        && (obj = _nm->embeddedOop_at(cur_insn())) != NULL
+        && (address) obj == adr) {
+      obj->print_value_on(st);
+      return;
+    }
+  }
+
+  // Fall through to a simple numeral.
+  st->print(INTPTR_FORMAT, (intptr_t)adr);
+}
+
+void decode_env::print_insn_labels() {
+  address p = cur_insn();
+  outputStream* st = output();
+  nmethod* nm = _nm;
+  if (nm != NULL) {
+    if (p == nm->entry_point())             st->print_cr("[Entry Point]");
+    if (p == nm->verified_entry_point())    st->print_cr("[Verified Entry Point]");
+    if (p == nm->exception_begin())         st->print_cr("[Exception Handler]");
+    if (p == nm->stub_begin())              st->print_cr("[Stub Code]");
+    if (p == nm->consts_begin())            st->print_cr("[Constants]");
+  }
+  CodeBlob* cb = _code;
+  if (cb != NULL) {
+    cb->print_block_comment(st, (intptr_t)(p - cb->instructions_begin()));
+  }
+  if (_print_pc) {
+    st->print("  " INTPTR_FORMAT ": ", (intptr_t) p);
+  }
+}
+
+void decode_env::print_insn_bytes(address pc, address pc_limit) {
+  outputStream* st = output();
+  size_t incr = 1;
+  size_t perline = _bytes_per_line;
+  if ((size_t) Disassembler::pd_instruction_alignment() >= sizeof(int)
+      && !((uintptr_t)pc % sizeof(int))
+      && !((uintptr_t)pc_limit % sizeof(int))) {
+    incr = sizeof(int);
+    if (perline % incr)  perline += incr - (perline % incr);
+  }
+  while (pc < pc_limit) {
+    // tab to the desired column:
+    st->move_to(COMMENT_COLUMN);
+    address pc0 = pc;
+    address pc1 = pc + perline;
+    if (pc1 > pc_limit)  pc1 = pc_limit;
+    for (; pc < pc1; pc += incr) {
+      if (pc == pc0)
+        st->print(BYTES_COMMENT);
+      else if ((uint)(pc - pc0) % sizeof(int) == 0)
+        st->print(" ");         // put out a space on word boundaries
+      if (incr == sizeof(int))
+            st->print("%08lx", *(int*)pc);
+      else  st->print("%02x",   (*pc)&0xFF);
+    }
+    st->cr();
+  }
+}
+
+
+static void* event_to_env(void* env_pv, const char* event, void* arg) {
+  decode_env* env = (decode_env*) env_pv;
+  return env->handle_event(event, (address) arg);
+}
+
+static int printf_to_env(void* env_pv, const char* format, ...) {
+  decode_env* env = (decode_env*) env_pv;
+  outputStream* st = env->output();
+  size_t flen = strlen(format);
+  const char* raw = NULL;
+  if (flen == 0)  return 0;
+  if (flen == 1 && format[0] == '\n') { st->bol(); return 1; }
+  if (flen < 2 ||
+      strchr(format, '%') == NULL) {
+    raw = format;
+  } else if (format[0] == '%' && format[1] == '%' &&
+             strchr(format+2, '%') == NULL) {
+    // happens a lot on machines with names like %foo
+    flen--;
+    raw = format+1;
+  }
+  if (raw != NULL) {
+    st->print_raw(raw, (int) flen);
+    return (int) flen;
+  }
+  va_list ap;
+  va_start(ap, format);
+  julong cnt0 = st->count();
+  st->vprint(format, ap);
+  julong cnt1 = st->count();
+  va_end(ap);
+  return (int)(cnt1 - cnt0);
+}
+
+address decode_env::decode_instructions(address start, address end) {
+  _start = start; _end = end;
+
+  assert((((intptr_t)start | (intptr_t)end) % Disassembler::pd_instruction_alignment() == 0), "misaligned insn addr");
+
+  const int show_bytes = false; // for disassembler debugging
+
+  //_version = Disassembler::pd_cpu_version();
+
+  if (!Disassembler::can_decode()) {
+    return NULL;
+  }
+
+  // decode a series of instructions and return the end of the last instruction
+
+  if (_print_raw) {
+    // Print whatever the library wants to print, w/o fancy callbacks.
+    // This is mainly for debugging the library itself.
+    FILE* out = stdout;
+    FILE* xmlout = (_print_raw > 1 ? out : NULL);
+    return (address)
+      (*Disassembler::_decode_instructions)(start, end,
+                                            NULL, (void*) xmlout,
+                                            NULL, (void*) out,
+                                            options());
+  }
+
+  return (address)
+    (*Disassembler::_decode_instructions)(start, end,
+                                          &event_to_env,  (void*) this,
+                                          &printf_to_env, (void*) this,
+                                          options());
+}
+
+
+void Disassembler::decode(CodeBlob* cb, outputStream* st) {
+  if (!load_library())  return;
+  decode_env env(cb, st);
+  env.output()->print_cr("Decoding CodeBlob " INTPTR_FORMAT, cb);
+  env.decode_instructions(cb->instructions_begin(), cb->instructions_end());
+}
+
+
+void Disassembler::decode(address start, address end, outputStream* st) {
+  if (!load_library())  return;
+  decode_env env(CodeCache::find_blob_unsafe(start), st);
+  env.decode_instructions(start, end);
+}
+
+void Disassembler::decode(nmethod* nm, outputStream* st) {
+  if (!load_library())  return;
+  decode_env env(nm, st);
+  env.output()->print_cr("Decoding compiled method " INTPTR_FORMAT ":", nm);
+  env.output()->print_cr("Code:");
+
+  unsigned char* p = nm->instructions_begin();
+  unsigned char* end = nm->instructions_end();
+
+  // If there has been profiling, print the buckets.
+  if (FlatProfiler::bucket_start_for(p) != NULL) {
+    unsigned char* p1 = p;
+    int total_bucket_count = 0;
+    while (p1 < end) {
+      unsigned char* p0 = p1;
+      p1 += pd_instruction_alignment();
+      address bucket_pc = FlatProfiler::bucket_start_for(p1);
+      if (bucket_pc != NULL && bucket_pc > p0 && bucket_pc <= p1)
+        total_bucket_count += FlatProfiler::bucket_count_for(p0);
+    }
+    env.set_total_ticks(total_bucket_count);
+  }
+
+  env.decode_instructions(p, end);
+}