FreeCalypso > hg > freecalypso-tools

annotate rvinterf/ctracedec/decode.c @ 619:f82551c77e58

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libserial-newlnx: ASYNC_LOW_LATENCY patch reverted Reports from Das Signal indicate that loadtools performance on Debian is about the same as on Slackware, and that including or omitting the ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the patch in question does not appear to be necessary, it is being reverted until and unless someone other than Serg reports an actual real-world system on which loadtools operation times are slowed compared to the Mother's Slackware reference and on which Slackware-like performance can be restored by setting the ASYNC_LOW_LATENCY flag.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 27 Feb 2020 01:09:48 +0000
parents e7502631a0f9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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Mychaela Falconia <falcon@freecalypso.org>
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2 * This module implements the actual decoding of compressed traces.
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Mychaela Falconia <falcon@freecalypso.org>
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3 */
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Mychaela Falconia <falcon@freecalypso.org>
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4
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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5 #include <sys/types.h>
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Mychaela Falconia <falcon@freecalypso.org>
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6 #include <stdio.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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7 #include <ctype.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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8 #include <string.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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9 #include <strings.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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10 #include <stdlib.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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11
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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12 extern char *str2ind_tab_filename;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 extern int str2ind_array_size;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 extern char **str2ind_orig_strings;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 extern char **str2ind_param_strings;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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16
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 #define MAX_PRINTF_PARAMS 16
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Mychaela Falconia <falcon@freecalypso.org>
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18
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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19 static int cindex, cindex_nchars;
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Mychaela Falconia <falcon@freecalypso.org>
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20 static u_char param_bytes_array[256];
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 static int param_bytes_count;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 static char *format_string, *param_type_string;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 static int num_printf_params;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 static u_long printf_params[MAX_PRINTF_PARAMS];
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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25 static char output_buf[2048];
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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26
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 decode_hex_digit(c)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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28 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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29 if (isdigit(c))
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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30 return(c - '0');
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Mychaela Falconia <falcon@freecalypso.org>
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31 else if (isupper(c))
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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32 return(c - 'A' + 10);
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Mychaela Falconia <falcon@freecalypso.org>
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33 else
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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34 return(c - 'a' + 10);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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35 }
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Mychaela Falconia <falcon@freecalypso.org>
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36
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Mychaela Falconia <falcon@freecalypso.org>
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37 static int
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Mychaela Falconia <falcon@freecalypso.org>
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38 decode_idx_and_params(line)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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39 char *line;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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40 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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41 char *cp;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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42 u_char *dp;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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43
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 for (cp = line; isdigit(*cp); cp++)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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45 ;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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46 if (*cp && *cp != ' ')
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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47 return(-1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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48 cindex = atoi(line);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
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49 cindex_nchars = cp - line;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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50 for (dp = param_bytes_array; *cp; ) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 if (*cp++ != ' ')
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 return(-1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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53 if (!isxdigit(cp[0]) || !isxdigit(cp[1]))
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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54 return(-1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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55 *dp++ = decode_hex_digit(cp[0]) << 4 | decode_hex_digit(cp[1]);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 cp += 2;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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57 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 param_bytes_count = dp - param_bytes_array;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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60 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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61
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 static void
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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63 decode_parameters(filename_for_errs, lineno_for_errs)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 char *filename_for_errs;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 int pi, type;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 u_char *bp, *endp;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 bp = param_bytes_array;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 endp = bp + param_bytes_count;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 for (pi = 0; pi < num_printf_params; pi++) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 type = param_type_string[pi];
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 switch (type) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 case 'c':
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 if (bp >= endp) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 wrong_param_byte_count: fprintf(stderr,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 "%s line %d: wrong number of parameter bytes for %s entry #%d\n",
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 filename_for_errs, lineno_for_errs,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 str2ind_tab_filename, cindex);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 printf_params[pi] = *bp++;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 continue;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 case 'i':
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 case 'p':
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 case '*':
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 if (bp > endp - 4)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 goto wrong_param_byte_count;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 printf_params[pi] = (u_long) bp[0] |
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 (u_long) bp[1] << 8 |
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 (u_long) bp[2] << 16 |
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 (u_long) bp[3] << 24;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 bp += 4;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 continue;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 case 's':
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 printf_params[pi] = (u_long) bp;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 for (;;) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 if (bp >= endp) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 fprintf(stderr,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 "%s line %d: unterminated string parameter in compressed trace\n",
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 filename_for_errs,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 lineno_for_errs);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 exit(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 if (!*bp++)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 break;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 continue;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 default:
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 fprintf(stderr,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 "%s entry #%d: parameter type \'%c\' not supported\n",
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 str2ind_tab_filename, cindex, type);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 exit(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 if (bp != endp)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 goto wrong_param_byte_count;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 process_ctrace_line(line, cindex_offset, filename_for_errs, lineno_for_errs)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 char *line, *filename_for_errs;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 if (decode_idx_and_params(line + cindex_offset) < 0) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 fprintf(stderr,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 "%s line %d: unable to decode compressed trace line\n",
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 filename_for_errs, lineno_for_errs);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 exit(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 if (cindex >= str2ind_array_size) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 fprintf(stderr,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 "%s line %d: index %d exceeds the range of %s\n",
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 filename_for_errs, lineno_for_errs, cindex,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 str2ind_tab_filename);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 exit(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 format_string = str2ind_orig_strings[cindex];
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 param_type_string = str2ind_param_strings[cindex];
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 num_printf_params = strlen(param_type_string);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 if (num_printf_params > MAX_PRINTF_PARAMS) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 fprintf(stderr,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 "error: entry #%d in %s has too many parameters\n",
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 cindex, str2ind_tab_filename);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 exit(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 decode_parameters(filename_for_errs, lineno_for_errs);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 ind2str_doprnt(format_string, printf_params, output_buf);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 printf("%.*s \"%s\"\n", cindex_offset + cindex_nchars, line,
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 output_buf);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 return(0);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 }