1 /*
2 * Copyright 2006 The Android Open Source Project
3 *
4 * JDWP spy.
5 */
6 #define _JDWP_MISC_INLINE
7 #include "Common.h"
8 #include <stdlib.h>
9 #include <stdio.h>
10 #include <string.h>
11 #include <assert.h>
12 #include <ctype.h>
13
14 static const char gHexDigit[] = "0123456789abcdef";
15
16 /*
17 * Print a hex dump. Just hands control off to the fancy version.
18 */
printHexDump(const void * vaddr,size_t length)19 void printHexDump(const void* vaddr, size_t length)
20 {
21 printHexDumpEx(stdout, vaddr, length, kHexDumpLocal, "");
22 }
printHexDump2(const void * vaddr,size_t length,const char * prefix)23 void printHexDump2(const void* vaddr, size_t length, const char* prefix)
24 {
25 printHexDumpEx(stdout, vaddr, length, kHexDumpLocal, prefix);
26 }
27
28 /*
29 * Print a hex dump in this format:
30 *
31 01234567: 00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff 0123456789abcdef\n
32 */
printHexDumpEx(FILE * fp,const void * vaddr,size_t length,HexDumpMode mode,const char * prefix)33 void printHexDumpEx(FILE* fp, const void* vaddr, size_t length,
34 HexDumpMode mode, const char* prefix)
35 {
36 const unsigned char* addr = reinterpret_cast<const unsigned char*>(vaddr);
37 char out[77]; /* exact fit */
38 unsigned int offset; /* offset to show while printing */
39 char* hex;
40 char* asc;
41 int gap;
42
43 if (mode == kHexDumpLocal)
44 offset = 0;
45 else
46 offset = (int) addr;
47
48 memset(out, ' ', sizeof(out)-1);
49 out[8] = ':';
50 out[sizeof(out)-2] = '\n';
51 out[sizeof(out)-1] = '\0';
52
53 gap = (int) offset & 0x0f;
54 while (length) {
55 unsigned int lineOffset = offset & ~0x0f;
56 char* hex = out;
57 char* asc = out + 59;
58
59 for (int i = 0; i < 8; i++) {
60 *hex++ = gHexDigit[lineOffset >> 28];
61 lineOffset <<= 4;
62 }
63 hex++;
64 hex++;
65
66 int count = ((int)length > 16-gap) ? 16-gap : (int) length; /* cap length */
67 assert(count != 0);
68 assert(count+gap <= 16);
69
70 if (gap) {
71 /* only on first line */
72 hex += gap * 3;
73 asc += gap;
74 }
75
76 int i;
77 for (i = gap ; i < count+gap; i++) {
78 *hex++ = gHexDigit[*addr >> 4];
79 *hex++ = gHexDigit[*addr & 0x0f];
80 hex++;
81 if (isprint(*addr))
82 *asc++ = *addr;
83 else
84 *asc++ = '.';
85 addr++;
86 }
87 for ( ; i < 16; i++) {
88 /* erase extra stuff; only happens on last line */
89 *hex++ = ' ';
90 *hex++ = ' ';
91 hex++;
92 *asc++ = ' ';
93 }
94
95 fprintf(fp, "%s%s", prefix, out);
96
97 gap = 0;
98 length -= count;
99 offset += count;
100 }
101 }
102
103
104 /*
105 * Explain it.
106 */
usage(const char * progName)107 static void usage(const char* progName)
108 {
109 fprintf(stderr, "Usage: %s VM-port [debugger-listen-port]\n\n", progName);
110 fprintf(stderr,
111 "When a debugger connects to the debugger-listen-port, jdwpspy will connect\n");
112 fprintf(stderr, "to the VM on the VM-port.\n");
113 }
114
115 /*
116 * Parse args.
117 */
main(int argc,char * argv[])118 int main(int argc, char* argv[])
119 {
120 if (argc < 2 || argc > 3) {
121 usage("jdwpspy");
122 return 2;
123 }
124
125 setvbuf(stdout, NULL, _IONBF, 0);
126
127 /* may want this to be host:port */
128 int connectPort = atoi(argv[1]);
129
130 int listenPort;
131 if (argc > 2)
132 listenPort = atoi(argv[2]);
133 else
134 listenPort = connectPort + 1;
135
136 int cc = run("localhost", connectPort, listenPort);
137
138 return (cc != 0);
139 }
140