hotspot/agent/src/share/native/sadis.c - edge/openjdk - Git at Google

 /*
  * Copyright (c) 2012, 2013, 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.
  *
  */

 #include "sun_jvm_hotspot_asm_Disassembler.h"

 /*
  *  This file implements a binding between Java and the hsdis
  *  dissasembler.  It should compile on Linux/Solaris and Windows.
  *  The only platform dependent pieces of the code for doing
  *  dlopen/dlsym to find the entry point in hsdis.  All the rest is
  *  standard JNI code.
  */

 #ifdef _WINDOWS

 #define snprintf  _snprintf
 #define vsnprintf _vsnprintf

 #include <windows.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #ifdef _DEBUG
 #include <crtdbg.h>
 #endif

 #else

 #include <string.h>
 #include <dlfcn.h>

 #ifndef __APPLE__
 #include <link.h>
 #endif

 #endif

 #include <limits.h>
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <errno.h>

 #ifdef _WINDOWS
 static int getLastErrorString(char *buf, size_t len)
 {
     long errval;

     if ((errval = GetLastError()) != 0)
     {
       /* DOS error */
       size_t n = (size_t)FormatMessage(
             FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
             NULL,
             errval,
             0,
             buf,
             (DWORD)len,
             NULL);
       if (n > 3) {
         /* Drop final '.', CR, LF */
         if (buf[n - 1] == '\n') n--;
         if (buf[n - 1] == '\r') n--;
         if (buf[n - 1] == '.') n--;
         buf[n] = '\0';
       }
       return (int)n;
     }

     if (errno != 0)
     {
       /* C runtime error that has no corresponding DOS error code */
       const char *s = strerror(errno);
       size_t n = strlen(s);
       if (n >= len) n = len - 1;
       strncpy(buf, s, n);
       buf[n] = '\0';
       return (int)n;
     }
     return 0;
 }
 #endif /* _WINDOWS */

 /*
  * Class:     sun_jvm_hotspot_asm_Disassembler
  * Method:    load_library
  * Signature: (Ljava/lang/String;)L
  */
 JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_asm_Disassembler_load_1library(JNIEnv * env,
                                                                            jclass disclass,
                                                                            jstring jrepath_s,
                                                                            jstring libname_s) {
   uintptr_t func = 0;
   const char* error_message = NULL;
   jboolean isCopy;

   const char * jrepath = (*env)->GetStringUTFChars(env, jrepath_s, &isCopy); // like $JAVA_HOME/jre/lib/sparc/
   const char * libname = (*env)->GetStringUTFChars(env, libname_s, &isCopy);
   char buffer[128];

   /* Load the hsdis library */
 #ifdef _WINDOWS
   HINSTANCE hsdis_handle;
   hsdis_handle = LoadLibrary(libname);
   if (hsdis_handle == NULL) {
     snprintf(buffer, sizeof(buffer), "%s%s", jrepath, libname);
     hsdis_handle = LoadLibrary(buffer);
   }
   if (hsdis_handle != NULL) {
     func = (uintptr_t)GetProcAddress(hsdis_handle, "decode_instructions_virtual");
   }
   if (func == 0) {
     getLastErrorString(buffer, sizeof(buffer));
     error_message = buffer;
   }
 #else
   void* hsdis_handle;
   hsdis_handle = dlopen(libname, RTLD_LAZY | RTLD_GLOBAL);
   if (hsdis_handle == NULL) {
     snprintf(buffer, sizeof(buffer), "%s%s", jrepath, libname);
     hsdis_handle = dlopen(buffer, RTLD_LAZY | RTLD_GLOBAL);
   }
   if (hsdis_handle != NULL) {
     func = (uintptr_t)dlsym(hsdis_handle, "decode_instructions_virtual");
   }
   if (func == 0) {
     error_message = dlerror();
   }
 #endif

   (*env)->ReleaseStringUTFChars(env, libname_s, libname);
   (*env)->ReleaseStringUTFChars(env, jrepath_s, jrepath);

   if (func == 0) {
     /* Couldn't find entry point.  error_message should contain some
      * platform dependent error message.
      */
     jclass eclass = (*env)->FindClass(env, "sun/jvm/hotspot/debugger/DebuggerException");
     (*env)->ThrowNew(env, eclass, error_message);
   }
   return (jlong)func;
 }

 /* signature of decode_instructions_virtual from hsdis.h */
 typedef void* (*decode_func)(uintptr_t start_va, uintptr_t end_va,
                              unsigned char* start, uintptr_t length,
                              void* (*event_callback)(void*, const char*, void*),
                              void* event_stream,
                              int (*printf_callback)(void*, const char*, ...),
                              void* printf_stream,
                              const char* options,
                              int newline);

 /* container for call back state when decoding instructions */
 typedef struct {
   JNIEnv* env;
   jobject dis;
   jobject visitor;
   jmethodID handle_event;
   jmethodID raw_print;
   char buffer[4096];
 } decode_env;


 /* event callback binding to Disassembler.handleEvent */
 static void* event_to_env(void* env_pv, const char* event, void* arg) {
   decode_env* denv = (decode_env*)env_pv;
   JNIEnv* env = denv->env;
   jstring event_string = (*env)->NewStringUTF(env, event);
   jlong result = (*env)->CallLongMethod(env, denv->dis, denv->handle_event, denv->visitor,
                                         event_string, (jlong) (uintptr_t)arg);
   if ((*env)->ExceptionOccurred(env) != NULL) {
     /* ignore exceptions for now */
     (*env)->ExceptionClear(env);
     result = 0;
   }
   return (void*)(uintptr_t)result;
 }

 /* printing callback binding to Disassembler.rawPrint */
 static int printf_to_env(void* env_pv, const char* format, ...) {
   jstring output;
   va_list ap;
   int cnt;
   decode_env* denv = (decode_env*)env_pv;
   JNIEnv* env = denv->env;
   size_t flen = strlen(format);
   const char* raw = NULL;

   if (flen == 0)  return 0;
   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) {
     jstring output = (*env)->NewStringUTF(env, raw);
     (*env)->CallVoidMethod(env, denv->dis, denv->raw_print, denv->visitor, output);
     if ((*env)->ExceptionOccurred(env) != NULL) {
       /* ignore exceptions for now */
       (*env)->ExceptionClear(env);
     }
     return (int) flen;
   }
   va_start(ap, format);
   cnt = vsnprintf(denv->buffer, sizeof(denv->buffer), format, ap);
   va_end(ap);

   output = (*env)->NewStringUTF(env, denv->buffer);
   (*env)->CallVoidMethod(env, denv->dis, denv->raw_print, denv->visitor, output);
   if ((*env)->ExceptionOccurred(env) != NULL) {
     /* ignore exceptions for now */
     (*env)->ExceptionClear(env);
   }
   return cnt;
 }

 /*
  * Class:     sun_jvm_hotspot_asm_Disassembler
  * Method:    decode
  * Signature: (Lsun/jvm/hotspot/asm/InstructionVisitor;J[BLjava/lang/String;J)V
  */
 JNIEXPORT void JNICALL Java_sun_jvm_hotspot_asm_Disassembler_decode(JNIEnv * env,
                                                                     jobject dis,
                                                                     jobject visitor,
                                                                     jlong startPc,
                                                                     jbyteArray code,
                                                                     jstring options_s,
                                                                     jlong decode_instructions_virtual) {
   jboolean isCopy;
   jbyte* start = (*env)->GetByteArrayElements(env, code, &isCopy);
   jbyte* end = start + (*env)->GetArrayLength(env, code);
   const char * options = (*env)->GetStringUTFChars(env, options_s, &isCopy);
   jclass disclass = (*env)->GetObjectClass(env, dis);

   decode_env denv;
   denv.env = env;
   denv.dis = dis;
   denv.visitor = visitor;

   /* find Disassembler.handleEvent callback */
   denv.handle_event = (*env)->GetMethodID(env, disclass, "handleEvent",
                                           "(Lsun/jvm/hotspot/asm/InstructionVisitor;Ljava/lang/String;J)J");
   if ((*env)->ExceptionOccurred(env)) {
     return;
   }

   /* find Disassembler.rawPrint callback */
   denv.raw_print = (*env)->GetMethodID(env, disclass, "rawPrint",
                                        "(Lsun/jvm/hotspot/asm/InstructionVisitor;Ljava/lang/String;)V");
   if ((*env)->ExceptionOccurred(env)) {
     return;
   }

   /* decode the buffer */
   (*(decode_func)(uintptr_t)decode_instructions_virtual)(startPc,
                                                          startPc + end - start,
                                                          (unsigned char*)start,
                                                          end - start,
                                                          &event_to_env,  (void*) &denv,
                                                          &printf_to_env, (void*) &denv,
                                                          options, 0 /* newline */);

   /* cleanup */
   (*env)->ReleaseByteArrayElements(env, code, start, JNI_ABORT);
   (*env)->ReleaseStringUTFChars(env, options_s, options);
 }
	/*
	* Copyright (c) 2012, 2013, 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.
	*
	*/

	#include "sun_jvm_hotspot_asm_Disassembler.h"

	/*
	* This file implements a binding between Java and the hsdis
	* dissasembler. It should compile on Linux/Solaris and Windows.
	* The only platform dependent pieces of the code for doing
	* dlopen/dlsym to find the entry point in hsdis. All the rest is
	* standard JNI code.
	*/

	#ifdef _WINDOWS

	#define snprintf _snprintf
	#define vsnprintf _vsnprintf

	#include <windows.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#ifdef _DEBUG
	#include <crtdbg.h>
	#endif

	#else

	#include <string.h>
	#include <dlfcn.h>

	#ifndef __APPLE__
	#include <link.h>
	#endif

	#endif

	#include <limits.h>
	#include <stdio.h>
	#include <stdarg.h>
	#include <stdlib.h>
	#include <errno.h>

	#ifdef _WINDOWS
	static int getLastErrorString(char *buf, size_t len)
	{
	long errval;

	if ((errval = GetLastError()) != 0)
	{
	/* DOS error */
	size_t n = (size_t)FormatMessage(
	FORMAT_MESSAGE_FROM_SYSTEM\|FORMAT_MESSAGE_IGNORE_INSERTS,
	NULL,
	errval,
	0,
	buf,
	(DWORD)len,
	NULL);
	if (n > 3) {
	/* Drop final '.', CR, LF */
	if (buf[n - 1] == '\n') n--;
	if (buf[n - 1] == '\r') n--;
	if (buf[n - 1] == '.') n--;
	buf[n] = '\0';
	}
	return (int)n;
	}

	if (errno != 0)
	{
	/* C runtime error that has no corresponding DOS error code */
	const char *s = strerror(errno);
	size_t n = strlen(s);
	if (n >= len) n = len - 1;
	strncpy(buf, s, n);
	buf[n] = '\0';
	return (int)n;
	}
	return 0;
	}
	#endif /* _WINDOWS */

	/*
	* Class: sun_jvm_hotspot_asm_Disassembler
	* Method: load_library
	* Signature: (Ljava/lang/String;)L
	*/
	JNIEXPORT jlong JNICALL Java_sun_jvm_hotspot_asm_Disassembler_load_1library(JNIEnv * env,
	jclass disclass,
	jstring jrepath_s,
	jstring libname_s) {
	uintptr_t func = 0;
	const char* error_message = NULL;
	jboolean isCopy;

	const char * jrepath = (*env)->GetStringUTFChars(env, jrepath_s, &isCopy); // like $JAVA_HOME/jre/lib/sparc/
	const char * libname = (*env)->GetStringUTFChars(env, libname_s, &isCopy);
	char buffer[128];

	/* Load the hsdis library */
	#ifdef _WINDOWS
	HINSTANCE hsdis_handle;
	hsdis_handle = LoadLibrary(libname);
	if (hsdis_handle == NULL) {
	snprintf(buffer, sizeof(buffer), "%s%s", jrepath, libname);
	hsdis_handle = LoadLibrary(buffer);
	}
	if (hsdis_handle != NULL) {
	func = (uintptr_t)GetProcAddress(hsdis_handle, "decode_instructions_virtual");
	}
	if (func == 0) {
	getLastErrorString(buffer, sizeof(buffer));
	error_message = buffer;
	}
	#else
	void* hsdis_handle;
	hsdis_handle = dlopen(libname, RTLD_LAZY \| RTLD_GLOBAL);
	if (hsdis_handle == NULL) {
	snprintf(buffer, sizeof(buffer), "%s%s", jrepath, libname);
	hsdis_handle = dlopen(buffer, RTLD_LAZY \| RTLD_GLOBAL);
	}
	if (hsdis_handle != NULL) {
	func = (uintptr_t)dlsym(hsdis_handle, "decode_instructions_virtual");
	}
	if (func == 0) {
	error_message = dlerror();
	}
	#endif

	(*env)->ReleaseStringUTFChars(env, libname_s, libname);
	(*env)->ReleaseStringUTFChars(env, jrepath_s, jrepath);

	if (func == 0) {
	/* Couldn't find entry point. error_message should contain some
	* platform dependent error message.
	*/
	jclass eclass = (*env)->FindClass(env, "sun/jvm/hotspot/debugger/DebuggerException");
	(*env)->ThrowNew(env, eclass, error_message);
	}
	return (jlong)func;
	}

	/* signature of decode_instructions_virtual from hsdis.h */
	typedef void* (*decode_func)(uintptr_t start_va, uintptr_t end_va,
	unsigned char* start, uintptr_t length,
	void* (event_callback)(void, const char, void),
	void* event_stream,
	int (printf_callback)(void, const char*, ...),
	void* printf_stream,
	const char* options,
	int newline);

	/* container for call back state when decoding instructions */
	typedef struct {
	JNIEnv* env;
	jobject dis;
	jobject visitor;
	jmethodID handle_event;
	jmethodID raw_print;
	char buffer[4096];
	} decode_env;


	/* event callback binding to Disassembler.handleEvent */
	static void* event_to_env(void* env_pv, const char* event, void* arg) {
	decode_env* denv = (decode_env*)env_pv;
	JNIEnv* env = denv->env;
	jstring event_string = (*env)->NewStringUTF(env, event);
	jlong result = (*env)->CallLongMethod(env, denv->dis, denv->handle_event, denv->visitor,
	event_string, (jlong) (uintptr_t)arg);
	if ((*env)->ExceptionOccurred(env) != NULL) {
	/* ignore exceptions for now */
	(*env)->ExceptionClear(env);
	result = 0;
	}
	return (void*)(uintptr_t)result;
	}

	/* printing callback binding to Disassembler.rawPrint */
	static int printf_to_env(void* env_pv, const char* format, ...) {
	jstring output;
	va_list ap;
	int cnt;
	decode_env* denv = (decode_env*)env_pv;
	JNIEnv* env = denv->env;
	size_t flen = strlen(format);
	const char* raw = NULL;

	if (flen == 0) return 0;
	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) {
	jstring output = (*env)->NewStringUTF(env, raw);
	(*env)->CallVoidMethod(env, denv->dis, denv->raw_print, denv->visitor, output);
	if ((*env)->ExceptionOccurred(env) != NULL) {
	/* ignore exceptions for now */
	(*env)->ExceptionClear(env);
	}
	return (int) flen;
	}
	va_start(ap, format);
	cnt = vsnprintf(denv->buffer, sizeof(denv->buffer), format, ap);
	va_end(ap);

	output = (*env)->NewStringUTF(env, denv->buffer);
	(*env)->CallVoidMethod(env, denv->dis, denv->raw_print, denv->visitor, output);
	if ((*env)->ExceptionOccurred(env) != NULL) {
	/* ignore exceptions for now */
	(*env)->ExceptionClear(env);
	}
	return cnt;
	}

	/*
	* Class: sun_jvm_hotspot_asm_Disassembler
	* Method: decode
	* Signature: (Lsun/jvm/hotspot/asm/InstructionVisitor;J[BLjava/lang/String;J)V
	*/
	JNIEXPORT void JNICALL Java_sun_jvm_hotspot_asm_Disassembler_decode(JNIEnv * env,
	jobject dis,
	jobject visitor,
	jlong startPc,
	jbyteArray code,
	jstring options_s,
	jlong decode_instructions_virtual) {
	jboolean isCopy;
	jbyte* start = (*env)->GetByteArrayElements(env, code, &isCopy);
	jbyte* end = start + (*env)->GetArrayLength(env, code);
	const char * options = (*env)->GetStringUTFChars(env, options_s, &isCopy);
	jclass disclass = (*env)->GetObjectClass(env, dis);

	decode_env denv;
	denv.env = env;
	denv.dis = dis;
	denv.visitor = visitor;

	/* find Disassembler.handleEvent callback */
	denv.handle_event = (*env)->GetMethodID(env, disclass, "handleEvent",
	"(Lsun/jvm/hotspot/asm/InstructionVisitor;Ljava/lang/String;J)J");
	if ((*env)->ExceptionOccurred(env)) {
	return;
	}

	/* find Disassembler.rawPrint callback */
	denv.raw_print = (*env)->GetMethodID(env, disclass, "rawPrint",
	"(Lsun/jvm/hotspot/asm/InstructionVisitor;Ljava/lang/String;)V");
	if ((*env)->ExceptionOccurred(env)) {
	return;
	}

	/* decode the buffer */
	(*(decode_func)(uintptr_t)decode_instructions_virtual)(startPc,
	startPc + end - start,
	(unsigned char*)start,
	end - start,
	&event_to_env, (void*) &denv,
	&printf_to_env, (void*) &denv,
	options, 0 /* newline */);

	/* cleanup */
	(*env)->ReleaseByteArrayElements(env, code, start, JNI_ABORT);
	(*env)->ReleaseStringUTFChars(env, options_s, options);
	}