jdk8-mips64-public/hotspot: src/share/tools/hsdis/hsdis-demo.c@710a3c8b516e (annotated)

src/share/tools/hsdis/hsdis-demo.c@710a3c8b516e (annotated)

src/share/tools/hsdis/hsdis-demo.c

Tue, 08 Aug 2017 15:57:29 +0800

author: aoqi
date: Tue, 08 Aug 2017 15:57:29 +0800
changeset 6876: 710a3c8b516e
parent 4244: 3d701c802d01
parent 0: f90c822e73f8
child 9572: 624a0741915c
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 2008, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 /* hsdis-demo.c -- dump a range of addresses as native instructions
    This demonstrates the protocol required by the HotSpot PrintAssembly option.
 */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <inttypes.h>
 #include "hsdis.h"
 void greet(const char*);
 void disassemble(uintptr_t, uintptr_t);
 void end_of_file();
 const char* options = NULL;
 int         raw     = 0;
 int         xml     = 0;
 int main(int ac, char** av) {
   int greeted = 0;
   int i;
   for (i = 1; i < ac; i++) {
     const char* arg = av[i];
     if (arg[0] == '-') {
       if (!strcmp(arg, "-xml"))
         xml ^= 1;
       else if (!strcmp(arg, "-raw"))
         raw ^= 1;
       else if (!strncmp(arg, "-options=", 9))
         options = arg+9;
       else
         { printf("Usage: %s [-xml] [name...]\n", av[0]); exit(2); }
       continue;
     }
     greet(arg);
     greeted = 1;
   }
   if (!greeted)
     greet("world");
   printf("...And now for something completely different:\n");
   void *start = (void*) &main;
   void *end = (void*) &end_of_file;
 #if defined(__ia64) || defined(__powerpc__)
   /* On IA64 and PPC function pointers are pointers to function descriptors */
   start = *((void**)start);
   end = *((void**)end);
 #endif
   disassemble(start, (end > start) ? end : start + 64);
   printf("Cheers!\n");
 }
 void greet(const char* whom) {
   printf("Hello, %s!\n", whom);
 }
 void end_of_file() { }
 /* don't disassemble after this point... */
 #include "dlfcn.h"
 #define DECODE_INSTRUCTIONS_VIRTUAL_NAME "decode_instructions_virtual"
 #define DECODE_INSTRUCTIONS_NAME "decode_instructions"
 #define HSDIS_NAME               "hsdis"
 static void* decode_instructions_pv = 0;
 static void* decode_instructions_sv = 0;
 static const char* hsdis_path[] = {
   HSDIS_NAME"-"LIBARCH LIB_EXT,
   "./" HSDIS_NAME"-"LIBARCH LIB_EXT,
 #ifdef TARGET_DIR
   TARGET_DIR"/"HSDIS_NAME"-"LIBARCH LIB_EXT,
 #endif
   NULL
 };
 static const char* load_decode_instructions() {
   void* dllib = NULL;
   const char* *next_in_path = hsdis_path;
   while (1) {
     decode_instructions_pv = dlsym(dllib, DECODE_INSTRUCTIONS_VIRTUAL_NAME);
     decode_instructions_sv = dlsym(dllib, DECODE_INSTRUCTIONS_NAME);
     if (decode_instructions_pv != NULL || decode_instructions_sv != NULL)
       return NULL;
     if (dllib != NULL)
       return "plugin does not defined "DECODE_INSTRUCTIONS_VIRTUAL_NAME" and "DECODE_INSTRUCTIONS_NAME;
     for (dllib = NULL; dllib == NULL; ) {
       const char* next_lib = (*next_in_path++);
       if (next_lib == NULL)
         return "cannot find plugin "HSDIS_NAME LIB_EXT;
       dllib = dlopen(next_lib, RTLD_LAZY);
     }
   }
 }
 static const char* lookup(void* addr) {
 #if defined(__ia64) || defined(__powerpc__)
   /* On IA64 and PPC function pointers are pointers to function descriptors */
 #define CHECK_NAME(fn) \
   if (addr == *((void**) &fn))  return #fn;
 #else
 #define CHECK_NAME(fn) \
   if (addr == (void*) &fn)  return #fn;
 #endif
   CHECK_NAME(main);
   CHECK_NAME(greet);
   return NULL;
 }
 /* does the event match the tag, followed by a null, space, or slash? */
 #define MATCH(event, tag) \
   (!strncmp(event, tag, sizeof(tag)-1) && \
    (!event[sizeof(tag)-1] || strchr(" /", event[sizeof(tag)-1])))
 static const char event_cookie[] = "event_cookie"; /* demo placeholder */
 static void* simple_handle_event(void* cookie, const char* event, void* arg) {
   if (MATCH(event, "/insn")) {
     // follow each complete insn by a nice newline
     printf("\n");
   }
   return NULL;
 }
 static void* handle_event(void* cookie, const char* event, void* arg) {
 #define NS_DEMO "demo:"
   if (cookie != event_cookie)
     printf("*** bad event cookie %p != %p\n", cookie, event_cookie);
   if (xml) {
     /* We could almost do a printf(event, arg),
        but for the sake of a better demo,
        we dress the result up as valid XML.
     */
     const char* fmt = strchr(event, ' ');
     int evlen = (fmt ? fmt - event : strlen(event));
     if (!fmt) {
       if (event[0] != '/') {
         printf("<"NS_DEMO"%.*s>", evlen, event);
       } else {
         printf("</"NS_DEMO"%.*s>", evlen-1, event+1);
       }
     } else {
       if (event[0] != '/') {
         printf("<"NS_DEMO"%.*s", evlen, event);
         printf(fmt, arg);
         printf(">");
       } else {
         printf("<"NS_DEMO"%.*s_done", evlen-1, event+1);
         printf(fmt, arg);
         printf("/></"NS_DEMO"%.*s>", evlen-1, event+1);
       }
     }
   }
   if (MATCH(event, "insn")) {
     const char* name = lookup(arg);
     if (name)  printf("%s:\n", name);
     /* basic action for <insn>: */
     printf(" %p\t", arg);
   } else if (MATCH(event, "/insn")) {
     // follow each complete insn by a nice newline
     printf("\n");
   } else if (MATCH(event, "mach")) {
     printf("Decoding for CPU '%s'\n", (char*) arg);
   } else if (MATCH(event, "addr")) {
     /* basic action for <addr/>: */
     const char* name = lookup(arg);
     if (name) {
       printf("&%s (%p)", name, arg);
       /* return non-null to notify hsdis not to print the addr */
       return arg;
     }
   }
   /* null return is always safe; can mean "I ignored it" */
   return NULL;
 }
 #define fprintf_callback \
   (decode_instructions_printf_callback_ftype)&fprintf
 void disassemble(uintptr_t from, uintptr_t to) {
   const char* err = load_decode_instructions();
   if (err != NULL) {
     printf("%s: %s\n", err, dlerror());
     exit(1);
   }
   decode_func_vtype decode_instructions_v
     = (decode_func_vtype) decode_instructions_pv;
   decode_func_stype decode_instructions_s
     = (decode_func_stype) decode_instructions_sv;
   void* res;
   if (decode_instructions_pv != NULL) {
     printf("\nDecoding from %p to %p...with %s\n", from, to, DECODE_INSTRUCTIONS_VIRTUAL_NAME);
     if (raw) {
       res = (*decode_instructions_v)(from, to,
                                      (unsigned char*)from, to - from,
                                      simple_handle_event, stdout,
                                      NULL, stdout,
                                      options, 0);
     } else {
       res = (*decode_instructions_v)(from, to,
                                     (unsigned char*)from, to - from,
                                      handle_event, (void*) event_cookie,
                                      fprintf_callback, stdout,
                                      options, 0);
     }
     if (res != (void*)to)
       printf("*** Result was %p!\n", res);
   }
   void* sres;
   if (decode_instructions_sv != NULL) {
     printf("\nDecoding from %p to %p...with old decode_instructions\n", from, to, DECODE_INSTRUCTIONS_NAME);
     if (raw) {
       sres = (*decode_instructions_s)(from, to,
                                       simple_handle_event, stdout,
                                       NULL, stdout,
                                       options);
     } else {
       sres = (*decode_instructions_s)(from, to,
                                       handle_event, (void*) event_cookie,
                                       fprintf_callback, stdout,
                                       options);
     }
     if (sres != (void *)to)
       printf("*** Result of decode_instructions %p!\n", sres);
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/tools/hsdis/hsdis-demo.c@710a3c8b516e (annotated)

src/share/tools/hsdis/hsdis-demo.c