FreeCalypso > hg > fc-magnetite
annotate helpers/cfg-hdr-gen.c @ 516:1ed9de6c90bd
src/g23m-gsm/sms/sms_for.c: bogus malloc removed
The new error handling code that was not present in TCS211 blob version
contains a malloc call that is bogus for 3 reasons:
1) The memory allocation in question is not needed in the first place;
2) libc malloc is used instead of one of the firmware's proper ways;
3) The memory allocation is made inside a function and then never freed,
i.e., a memory leak.
This bug was caught in gcc-built FreeCalypso fw projects (Citrine
and Selenite) because our gcc environment does not allow any use of
libc malloc (any reference to malloc produces a link failure),
but this code from TCS3.2 is wrong even for Magnetite: if this code
path is executed repeatedly over a long time, the many small allocations
made by this malloc call without a subsequent free will eventually
exhaust the malloc heap provided by the TMS470 environment, malloc will
start returning NULL, and the bogus code will treat it as an error.
Because the memory allocation in question is not needed at all,
the fix entails simply removing it.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 22 Jul 2018 06:04:49 +0000 |
parents | b8b08c302ace |
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rev | line source |
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388
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1 /* |
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2 * This helper program generates the set of *.cfg header files, based on a |
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3 * template file and environment variables for the non-constant settings. |
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4 */ |
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5 |
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6 #include <stdio.h> |
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7 #include <stdlib.h> |
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8 #include <unistd.h> |
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9 #include <ctype.h> |
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10 #include <string.h> |
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11 #include <strings.h> |
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12 |
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13 char *infname; |
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14 FILE *inf, *outf; |
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15 char include_guard_symbol[32]; |
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16 char linebuf[256]; |
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17 int lineno; |
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18 |
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19 make_include_guard_symbol(fname) |
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20 char *fname; |
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21 { |
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22 char *sp, *dp; |
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23 int c; |
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24 |
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25 sp = fname; |
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26 dp = include_guard_symbol; |
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27 *dp++ = '_'; |
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28 *dp++ = '_'; |
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29 while (c = *sp++) { |
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30 if (islower(c)) |
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31 c = toupper(c); |
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32 else if (c == '.') |
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33 c = '_'; |
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34 *dp++ = c; |
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35 } |
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36 *dp++ = '_'; |
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37 *dp++ = '_'; |
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38 *dp = '\0'; |
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39 } |
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40 |
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41 close_output() |
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42 { |
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43 if (outf) { |
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44 fprintf(outf, "#endif /* %s */\n", include_guard_symbol); |
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45 fclose(outf); |
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46 outf = 0; |
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47 } |
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48 } |
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49 |
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50 bracket_line() |
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51 { |
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52 char *cp; |
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53 |
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54 close_output(); |
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55 cp = index(linebuf+1, ']'); |
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56 if (!cp) { |
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57 fprintf(stderr, "%s line %d: unterminated bracket line\n", |
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58 infname, lineno); |
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59 exit(1); |
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60 } |
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61 *cp = '\0'; |
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62 outf = fopen(linebuf+1, "w"); |
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63 if (!outf) { |
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64 perror(linebuf+1); |
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65 exit(1); |
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66 } |
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67 make_include_guard_symbol(linebuf+1); |
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68 fprintf(outf, "#ifndef %s\n", include_guard_symbol); |
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69 fprintf(outf, "#define %s\n", include_guard_symbol); |
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70 } |
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71 |
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72 process_line() |
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73 { |
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74 char *cp, *symbol, *value; |
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75 |
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76 if (linebuf[0] == '[') |
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77 return bracket_line(); |
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78 for (cp = linebuf; isspace(*cp); cp++) |
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79 ; |
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80 if (*cp == '\0' || *cp == '#') |
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81 return; |
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82 for (symbol = cp; *cp && !isspace(*cp); cp++) |
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83 ; |
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84 if (!*cp) { |
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85 inv: fprintf(stderr, "%s line %d: expected two fields\n", |
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86 infname, lineno); |
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87 exit(1); |
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88 } |
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89 *cp++ = '\0'; |
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90 while (isspace(*cp)) |
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91 cp++; |
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92 if (*cp == '\0' || *cp == '#') |
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93 goto inv; |
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94 for (value = cp; *cp && !isspace(*cp); cp++) |
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95 ; |
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96 if (*cp) |
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97 *cp++ = '\0'; |
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98 while (isspace(*cp)) |
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99 cp++; |
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100 if (*cp != '\0' && *cp != '#') |
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101 goto inv; |
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102 if (!strcmp(value, "var")) { |
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103 value = getenv(symbol); |
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104 if (!value) { |
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105 fprintf(stderr, |
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106 "%s line %d: no environment variable named %s\n", |
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107 infname, lineno, symbol); |
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108 exit(1); |
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109 } |
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110 } |
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111 if (!outf) { |
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112 fprintf(stderr, "%s line %d: no open output file\n", |
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113 infname, lineno); |
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114 exit(1); |
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115 } |
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116 fprintf(outf, "#define %s %s\n", symbol, value); |
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117 } |
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118 |
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119 main(argc, argv) |
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120 char **argv; |
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121 { |
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122 if (argc != 3) { |
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123 fprintf(stderr, "usage: %s template-file output-dir\n", |
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Mychaela Falconia <falcon@freecalypso.org>
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124 argv[0]); |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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125 exit(1); |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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126 } |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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127 infname = argv[1]; |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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128 inf = fopen(infname, "r"); |
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Mychaela Falconia <falcon@freecalypso.org>
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129 if (!inf) { |
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Mychaela Falconia <falcon@freecalypso.org>
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130 perror(infname); |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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131 exit(1); |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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132 } |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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133 if (chdir(argv[2]) < 0) { |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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134 perror(argv[2]); |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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135 exit(1); |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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136 } |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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137 for (lineno = 1; fgets(linebuf, sizeof linebuf, inf); lineno++) |
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Mychaela Falconia <falcon@freecalypso.org>
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138 process_line(); |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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139 close_output(); |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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140 exit(0); |
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cfg-hdr-gen C helper program written
Mychaela Falconia <falcon@freecalypso.org>
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141 } |