/* * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of Oracle nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * This source code is provided to illustrate the usage of a given feature * or technique and has been deliberately simplified. Additional steps * required for a production-quality application, such as security checks, * input validation and proper error handling, might not be present in * this sample code. */ #ifndef JAVA_CRW_DEMO_H #define JAVA_CRW_DEMO_H #include #ifdef __cplusplus extern "C" { #endif /* This callback is used to notify the caller of a fatal error. */ typedef void (*FatalErrorHandler)(const char*message, const char*file, int line); /* This callback is used to return the method information for a class. * Since the information was already read here, it was useful to * return it here, with no JVMTI phase restrictions. * If the class file does represent a "class" and it has methods, then * this callback will be called with the class number and pointers to * the array of names, array of signatures, and the count of methods. */ typedef void (*MethodNumberRegister)(unsigned, const char**, const char**, int); /* Class file reader/writer interface. Basic input is a classfile image * and details about what to inject. The output is a new classfile image * that was allocated with malloc(), and should be freed by the caller. */ /* Names of external symbols to look for. These are the names that we * try and lookup in the shared library. On Windows 2000, the naming * convention is to prefix a "_" and suffix a "@N" where N is 4 times * the number or arguments supplied.It has 19 args, so 76 = 19*4. * On Windows 2003, Linux, and Solaris, the first name will be * found, on Windows 2000 a second try should find the second name. * * WARNING: If You change the JavaCrwDemo typedef, you MUST change * multiple things in this file, including this name. */ #define JAVA_CRW_DEMO_SYMBOLS { "java_crw_demo", "_java_crw_demo@76" } /* Typedef needed for type casting in dynamic access situations. */ typedef void (JNICALL *JavaCrwDemo)( unsigned class_number, const char *name, const unsigned char *file_image, long file_len, int system_class, char* tclass_name, char* tclass_sig, char* call_name, char* call_sig, char* return_name, char* return_sig, char* obj_init_name, char* obj_init_sig, char* newarray_name, char* newarray_sig, unsigned char **pnew_file_image, long *pnew_file_len, FatalErrorHandler fatal_error_handler, MethodNumberRegister mnum_callback ); /* Function export (should match typedef above) */ JNIEXPORT void JNICALL java_crw_demo( unsigned class_number, /* Caller assigned class number for class */ const char *name, /* Internal class name, e.g. java/lang/Object */ /* (Do not use "java.lang.Object" format) */ const unsigned char *file_image, /* Pointer to classfile image for this class */ long file_len, /* Length of the classfile in bytes */ int system_class, /* Set to 1 if this is a system class */ /* (prevents injections into empty */ /* , finalize, and methods) */ char* tclass_name, /* Class that has methods we will call at */ /* the injection sites (tclass) */ char* tclass_sig, /* Signature of tclass */ /* (Must be "L" + tclass_name + ";") */ char* call_name, /* Method name in tclass to call at offset 0 */ /* for every method */ char* call_sig, /* Signature of this call_name method */ /* (Must be "(II)V") */ char* return_name, /* Method name in tclass to call at all */ /* return opcodes in every method */ char* return_sig, /* Signature of this return_name method */ /* (Must be "(II)V") */ char* obj_init_name, /* Method name in tclass to call first thing */ /* when injecting java.lang.Object. */ char* obj_init_sig, /* Signature of this obj_init_name method */ /* (Must be "(Ljava/lang/Object;)V") */ char* newarray_name, /* Method name in tclass to call after every */ /* newarray opcode in every method */ char* newarray_sig, /* Signature of this method */ /* (Must be "(Ljava/lang/Object;II)V") */ unsigned char **pnew_file_image, /* Returns a pointer to new classfile image */ long *pnew_file_len, /* Returns the length of the new image */ FatalErrorHandler fatal_error_handler, /* Pointer to function to call on any */ /* fatal error. NULL sends error to stderr */ MethodNumberRegister mnum_callback /* Pointer to function that gets called */ /* with all details on methods in this */ /* class. NULL means skip this call. */ ); /* External to read the class name out of a class file . * * WARNING: If You change the typedef, you MUST change * multiple things in this file, including this name. */ #define JAVA_CRW_DEMO_CLASSNAME_SYMBOLS \ { "java_crw_demo_classname", "_java_crw_demo_classname@12" } /* Typedef needed for type casting in dynamic access situations. */ typedef char * (JNICALL *JavaCrwDemoClassname)( const unsigned char *file_image, long file_len, FatalErrorHandler fatal_error_handler); JNIEXPORT char * JNICALL java_crw_demo_classname( const unsigned char *file_image, long file_len, FatalErrorHandler fatal_error_handler); #ifdef __cplusplus } /* extern "C" */ #endif /* __cplusplus */ #endif