… | |
… | |
8 | && (PERL_VERSION > (b) \ |
8 | && (PERL_VERSION > (b) \ |
9 | || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) |
9 | || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) |
10 | |
10 | |
11 | #if !PERL_VERSION_ATLEAST (5,8,9) |
11 | #if !PERL_VERSION_ATLEAST (5,8,9) |
12 | # define SVt_LAST 16 |
12 | # define SVt_LAST 16 |
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13 | #endif |
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14 | |
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15 | #if !PERL_VERSION_ATLEAST (5,10,0) |
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16 | # define SvPAD_OUR(dummy) 0 |
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17 | #endif |
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18 | |
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19 | /* pre-5.10 perls always succeed, with 5.10, we have to check first apparently */ |
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20 | #ifndef GvNAME_HEK |
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21 | # define GvNAME_HEK(sv) 1 |
13 | #endif |
22 | #endif |
14 | |
23 | |
15 | #define res_pair(text) \ |
24 | #define res_pair(text) \ |
16 | do { \ |
25 | do { \ |
17 | AV *av = newAV (); \ |
26 | AV *av = newAV (); \ |
… | |
… | |
20 | av_push (av, sv_rvweaken (newRV_inc (sv))); \ |
29 | av_push (av, sv_rvweaken (newRV_inc (sv))); \ |
21 | if (rmagical) SvRMAGICAL_off (sv); \ |
30 | if (rmagical) SvRMAGICAL_off (sv); \ |
22 | av_push (about, newRV_noinc ((SV *)av)); \ |
31 | av_push (about, newRV_noinc ((SV *)av)); \ |
23 | } while (0) |
32 | } while (0) |
24 | |
33 | |
25 | #define res_gv(sigil) \ |
34 | #define res_text(text) \ |
26 | do { \ |
35 | do { \ |
27 | AV *av = newAV (); \ |
36 | AV *av = newAV (); \ |
28 | av_push (av, newSVpv (form ("in the global %c%s::%.*s", sigil, \ |
37 | av_push (av, newSVpv (text, 0)); \ |
29 | HvNAME (GvSTASH (sv)), \ |
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30 | GvNAMELEN (sv), GvNAME (sv) ? GvNAME (sv) : "<anonymous>"), \ |
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31 | 0)); \ |
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32 | av_push (about, newRV_noinc ((SV *)av)); \ |
38 | av_push (about, newRV_noinc ((SV *)av)); \ |
33 | } while (0) |
39 | } while (0) |
34 | |
40 | |
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41 | #define res_gv(sigil) \ |
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42 | res_text (form ("in the global %c%s::%.*s", sigil, \ |
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43 | HvNAME (GvSTASH (sv)), \ |
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44 | GvNAME_HEK (sv) ? GvNAMELEN (sv) : 11, \ |
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45 | GvNAME_HEK (sv) ? GvNAME (sv) : "<anonymous>")) |
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46 | |
35 | MODULE = Devel::FindRef PACKAGE = Devel::FindRef |
47 | MODULE = Devel::FindRef PACKAGE = Devel::FindRef |
36 | |
48 | |
37 | PROTOTYPES: ENABLE |
49 | PROTOTYPES: ENABLE |
38 | |
50 | |
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51 | void |
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52 | find_ (SV *target_ref) |
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53 | PPCODE: |
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54 | { |
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55 | SV *arena, *targ; |
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56 | U32 rmagical; |
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57 | int i; |
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58 | AV *about = newAV (); |
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59 | AV *excl = newAV (); |
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60 | |
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61 | if (!SvROK (target_ref)) |
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62 | croak ("find expects a reference to a perl value"); |
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63 | |
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64 | targ = SvRV (target_ref); |
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65 | |
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66 | if (SvIMMORTAL (targ)) |
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67 | { |
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68 | if (targ == &PL_sv_undef) |
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69 | res_text ("the immortal 'undef' value"); |
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70 | else if (targ == &PL_sv_yes) |
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71 | res_text ("the immortal 'yes' value"); |
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72 | else if (targ == &PL_sv_no) |
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73 | res_text ("the immortal 'no' value"); |
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74 | else if (targ == &PL_sv_placeholder) |
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75 | res_text ("the immortal placeholder value"); |
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76 | else |
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77 | res_text ("some unknown immortal"); |
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78 | } |
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79 | else |
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80 | { |
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81 | for (arena = PL_sv_arenaroot; arena; arena = SvANY (arena)) |
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82 | { |
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83 | UV idx = SvREFCNT (arena); |
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84 | |
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85 | /* Remember that the zeroth slot is used as the pointer onwards, so don't |
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86 | include it. */ |
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87 | while (--idx > 0) |
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88 | { |
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89 | SV *sv = &arena [idx]; |
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90 | |
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91 | if (SvTYPE (sv) >= SVt_LAST) |
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92 | continue; |
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93 | |
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94 | /* temporarily disable RMAGICAL, it can easily interfere with us */ |
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95 | if ((rmagical = SvRMAGICAL (sv))) |
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96 | SvRMAGICAL_off (sv); |
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97 | |
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98 | if (SvTYPE (sv) >= SVt_PVMG) |
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99 | { |
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100 | if (SvTYPE (sv) == SVt_PVMG && SvPAD_OUR (sv)) |
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101 | { |
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102 | /* I have no clue what this is */ |
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103 | /* maybe some placeholder for our variables for eval? */ |
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104 | /* it doesn't seem to reference anything, so we should be able to ignore it */ |
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105 | } |
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106 | else |
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107 | { |
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108 | MAGIC *mg = SvMAGIC (sv); |
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109 | |
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110 | while (mg) |
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111 | { |
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112 | if (mg->mg_obj == targ && mg->mg_flags & MGf_REFCOUNTED) |
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113 | res_pair (form ("referenced (in mg_obj) by '%c' type magic attached to", mg->mg_type)); |
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114 | |
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115 | if ((SV *)mg->mg_ptr == targ) |
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116 | res_pair (form ("%sreferenced (in mg_ptr) by '%c' type magic attached to", |
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117 | mg->mg_len == HEf_SVKEY ? "" : "possibly ", |
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118 | mg->mg_type)); |
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119 | |
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120 | mg = mg->mg_moremagic; |
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121 | } |
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122 | } |
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123 | } |
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124 | |
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125 | if (SvROK (sv)) |
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126 | { |
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127 | if (SvRV (sv) == targ && !SvWEAKREF (sv) && sv != target_ref) |
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128 | res_pair ("referenced by"); |
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129 | } |
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130 | else |
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131 | switch (SvTYPE (sv)) |
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132 | { |
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133 | case SVt_PVAV: |
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134 | if (AvREAL (sv)) |
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135 | for (i = AvFILLp (sv) + 1; i--; ) |
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136 | if (AvARRAY (sv)[i] == targ) |
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137 | res_pair (form ("in array element %d of", i)); |
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138 | |
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139 | break; |
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140 | |
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141 | case SVt_PVHV: |
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142 | if (hv_iterinit ((HV *)sv)) |
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143 | { |
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144 | HE *he; |
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145 | |
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146 | while ((he = hv_iternext ((HV *)sv))) |
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147 | if (HeVAL (he) == targ) |
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148 | res_pair (form ("in the member '%.*s' of", HeKLEN (he), HeKEY (he))); |
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149 | } |
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150 | |
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151 | break; |
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152 | |
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153 | case SVt_PVCV: |
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154 | { |
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155 | int depth = CvDEPTH (sv); |
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156 | |
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157 | /* Anonymous subs have a padlist but zero depth */ |
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158 | if (CvANON (sv) && !depth && CvPADLIST (sv)) |
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159 | depth = 1; |
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160 | |
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161 | if (depth) |
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162 | { |
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163 | AV *padlist = CvPADLIST (sv); |
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164 | |
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165 | while (depth) |
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166 | { |
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167 | AV *pad = (AV *)AvARRAY (padlist)[depth]; |
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168 | |
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169 | av_push (excl, newSVuv (PTR2UV (pad))); /* exclude pads themselves from being found */ |
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170 | |
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171 | /* The 0th pad slot is @_ */ |
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172 | if (AvARRAY (pad)[0] == targ) |
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173 | res_pair ("the argument array for"); |
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174 | |
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175 | for (i = AvFILLp (pad) + 1; --i; ) |
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176 | if (AvARRAY (pad)[i] == targ) |
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177 | { |
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178 | /* Values from constant functions are stored in the pad without any name */ |
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179 | SV *name_sv = AvARRAY (AvARRAY (padlist)[0])[i]; |
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180 | |
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181 | if (name_sv && SvPOK (name_sv)) |
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182 | res_pair (form ("in the lexical '%s' in", SvPVX (name_sv))); |
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183 | else |
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184 | res_pair ("in an unnamed lexical in"); |
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185 | } |
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186 | |
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187 | --depth; |
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188 | } |
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189 | } |
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190 | |
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191 | if (CvCONST (sv) && (SV*)CvXSUBANY (sv).any_ptr == targ) |
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192 | res_pair ("the constant value of"); |
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193 | |
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194 | if (!CvWEAKOUTSIDE (sv) && (SV*)CvOUTSIDE (sv) == targ) |
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195 | res_pair ("the containing scope for"); |
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196 | |
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197 | if (sv == targ && CvANON (sv)) |
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198 | if (CvSTART (sv) |
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199 | && CvSTART (sv)->op_type == OP_NEXTSTATE |
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200 | && CopLINE ((COP *)CvSTART (sv))) |
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201 | res_text (form ("the closure created at %s:%d", |
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202 | CopFILE ((COP *)CvSTART (sv)) ? CopFILE ((COP *)CvSTART (sv)) : "<unknown>", |
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203 | CopLINE ((COP *)CvSTART (sv)))); |
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204 | else |
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205 | res_text (form ("the closure created somewhere in file %s (PLEASE REPORT!)", |
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206 | CvFILE (sv) ? CvFILE (sv) : "<unknown>")); |
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207 | } |
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208 | |
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209 | break; |
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210 | |
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211 | case SVt_PVGV: |
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212 | if (GvGP (sv)) |
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213 | { |
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214 | if (GvSV (sv) == (SV *)targ) res_gv ('$'); |
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215 | if (GvAV (sv) == (AV *)targ) res_gv ('@'); |
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216 | if (GvHV (sv) == (HV *)targ) res_gv ('%'); |
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217 | if (GvCV (sv) == (CV *)targ) res_gv ('&'); |
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218 | } |
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219 | |
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220 | break; |
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221 | |
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222 | case SVt_PVLV: |
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223 | if (LvTARG (sv) == targ) |
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224 | { |
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225 | if (LvTYPE (sv) == 'y') |
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226 | { |
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227 | MAGIC *mg = mg_find (sv, PERL_MAGIC_defelem); |
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228 | |
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229 | if (mg && mg->mg_obj) |
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230 | res_pair (form ("the target for the lvalue hash element '%.*s',", |
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231 | SvCUR (mg->mg_obj), SvPV_nolen (mg->mg_obj))); |
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232 | else |
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233 | res_pair (form ("the target for the lvalue array element #%d,", LvTARGOFF (sv))); |
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234 | } |
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235 | else |
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236 | res_pair (form ("an lvalue reference target (type '%c', ofs %d, len %d),", |
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237 | LvTYPE (sv), LvTARGOFF (sv), LvTARGLEN (sv))); |
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238 | } |
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239 | |
|
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240 | break; |
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241 | } |
|
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242 | |
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243 | if (rmagical) |
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244 | SvRMAGICAL_on (sv); |
|
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245 | } |
|
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246 | } |
|
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247 | |
|
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248 | /* look at the mortalise stack of the current coroutine */ |
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249 | for (i = 0; i <= PL_tmps_ix; ++i) |
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250 | if (PL_tmps_stack [i] == targ) |
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251 | res_text ("a temporary on the stack"); |
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252 | |
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253 | if (targ == (SV*)PL_main_cv) |
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254 | res_text ("the main body of the program"); |
|
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255 | } |
|
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256 | |
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257 | EXTEND (SP, 2); |
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258 | PUSHs (sv_2mortal (newRV_noinc ((SV *)about))); |
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259 | PUSHs (sv_2mortal (newRV_noinc ((SV *)excl))); |
|
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260 | } |
|
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261 | |
39 | SV * |
262 | SV * |
40 | ptr2ref (IV ptr) |
263 | ptr2ref (UV ptr) |
41 | CODE: |
264 | CODE: |
42 | RETVAL = newRV_inc (INT2PTR (SV *, ptr)); |
265 | RETVAL = newRV_inc (INT2PTR (SV *, ptr)); |
43 | OUTPUT: |
266 | OUTPUT: |
44 | RETVAL |
267 | RETVAL |
45 | |
268 | |
46 | void |
269 | UV |
47 | find_ (SV *target) |
270 | ref2ptr (SV *rv) |
48 | PPCODE: |
271 | CODE: |
49 | { |
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50 | SV *arena, *targ; |
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51 | int rmagical, i; |
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52 | AV *about = newAV (); |
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53 | AV *excl = newAV (); |
|
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54 | |
|
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55 | if (!SvROK (target)) |
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56 | croak ("find expects a reference to a perl value"); |
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57 | |
|
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58 | targ = SvRV (target); |
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59 | |
|
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60 | for (arena = PL_sv_arenaroot; arena; arena = SvANY (arena)) |
|
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61 | { |
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62 | UV idx = SvREFCNT (arena); |
|
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63 | |
|
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64 | /* Remember that the zeroth slot is used as the pointer onwards, so don't |
|
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65 | include it. */ |
|
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66 | while (--idx > 0) |
|
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67 | { |
|
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68 | SV *sv = &arena [idx]; |
|
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69 | |
|
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70 | if (SvTYPE (sv) >= SVt_LAST) |
|
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71 | continue; |
|
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72 | |
|
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73 | /* temporarily disable RMAGICAL, it can easily interfere with us */ |
|
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74 | if ((rmagical = SvRMAGICAL (sv))) |
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75 | SvRMAGICAL_off (sv); |
|
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76 | |
|
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77 | if (SvTYPE (sv) >= SVt_PVMG) |
|
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78 | { |
|
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79 | MAGIC *mg = SvMAGIC (sv); |
|
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80 | while (mg) |
|
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81 | { |
|
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82 | if (mg->mg_obj == targ) |
|
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83 | res_pair (form ("referenced (in mg_obj) by '%c' type magic attached to", mg->mg_type)); |
|
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84 | |
|
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85 | if ((SV *)mg->mg_ptr == targ && mg->mg_flags & MGf_REFCOUNTED) |
|
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86 | res_pair (form ("referenced (in mg_ptr) by '%c' type magic attached to", mg->mg_type)); |
|
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87 | |
|
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88 | mg = mg->mg_moremagic; |
|
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89 | } |
|
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90 | } |
|
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91 | |
|
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92 | if (SvROK (sv)) |
272 | if (!SvROK (rv)) |
93 | { |
273 | croak ("argument to Devel::FindRef::ref2ptr must be a reference"); |
94 | if (sv != target && SvRV (sv) == targ && !SvWEAKREF (sv)) |
274 | RETVAL = PTR2UV (SvRV (rv)); |
95 | res_pair ("referenced by"); |
275 | OUTPUT: |
96 | } |
276 | RETVAL |
97 | else |
|
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98 | switch (SvTYPE (sv)) |
|
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99 | { |
|
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100 | case SVt_PVAV: |
|
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101 | if (AvREAL (sv)) |
|
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102 | for (i = AvFILLp (sv) + 1; i--; ) |
|
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103 | if (AvARRAY (sv)[i] == targ) |
|
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104 | res_pair (form ("in array element %d of", i)); |
|
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105 | |
277 | |
106 | break; |
278 | U32 |
107 | |
279 | _refcnt (SV *rv) |
108 | case SVt_PVHV: |
280 | CODE: |
109 | if (hv_iterinit ((HV *)sv)) |
281 | if (!SvROK (rv)) |
110 | { |
282 | croak ("argument to Devel::FindRef::_refcnt must be a reference"); |
111 | HE *he; |
283 | RETVAL = SvREFCNT (SvRV (rv)); |
112 | |
284 | OUTPUT: |
113 | while ((he = hv_iternext ((HV *)sv))) |
285 | RETVAL |
114 | if (HeVAL (he) == targ) |
|
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115 | res_pair (form ("in the member '%.*s' of", HeKLEN (he), HeKEY (he))); |
|
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116 | } |
|
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117 | |
|
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118 | break; |
|
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119 | |
|
|
120 | case SVt_PVCV: |
|
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121 | { |
|
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122 | int depth = CvDEPTH (sv); |
|
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123 | |
|
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124 | /* Anonymous subs have a padlist but zero depth */ |
|
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125 | if (!depth && CvPADLIST (sv)) |
|
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126 | depth = 1; |
|
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127 | |
|
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128 | if (depth) |
|
|
129 | { |
|
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130 | AV *padlist = CvPADLIST (sv); |
|
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131 | |
|
|
132 | while (depth) |
|
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133 | { |
|
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134 | AV *pad = (AV *)AvARRAY (padlist)[depth]; |
|
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135 | |
|
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136 | av_push (excl, newSVuv (PTR2UV (pad))); /* exclude pads themselves from being found */ |
|
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137 | |
|
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138 | for (i = AvFILLp (pad) + 1; i--; ) |
|
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139 | if (AvARRAY (pad)[i] == targ) |
|
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140 | { |
|
|
141 | /* Values from constant functions are stored in the pad without any name */ |
|
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142 | SV *name_sv = AvARRAY (AvARRAY (padlist)[0])[i]; |
|
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143 | |
|
|
144 | if (name_sv && SvPOK (name_sv)) |
|
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145 | res_pair (form ("in the lexical '%s' in", SvPVX (name_sv))); |
|
|
146 | else |
|
|
147 | res_pair ("in an unnamed lexical in"); |
|
|
148 | } |
|
|
149 | |
|
|
150 | --depth; |
|
|
151 | } |
|
|
152 | } |
|
|
153 | |
|
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154 | if (CvCONST (sv) && (SV*)CvXSUBANY (sv).any_ptr == targ) |
|
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155 | res_pair ("the constant value of"); |
|
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156 | |
|
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157 | if (!CvWEAKOUTSIDE (sv) && (SV*)CvOUTSIDE (sv) == targ) |
|
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158 | res_pair ("the containing scope for"); |
|
|
159 | } |
|
|
160 | |
|
|
161 | break; |
|
|
162 | |
|
|
163 | case SVt_PVGV: |
|
|
164 | if (GvGP (sv)) |
|
|
165 | { |
|
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166 | if (GvSV (sv) == (SV *)targ) res_gv ('$'); |
|
|
167 | if (GvAV (sv) == (AV *)targ) res_gv ('@'); |
|
|
168 | if (GvHV (sv) == (HV *)targ) res_gv ('%'); |
|
|
169 | if (GvCV (sv) == (CV *)targ) res_gv ('&'); |
|
|
170 | } |
|
|
171 | |
|
|
172 | break; |
|
|
173 | } |
|
|
174 | |
|
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175 | if (rmagical) |
|
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176 | SvRMAGICAL_on (sv); |
|
|
177 | } |
|
|
178 | } |
|
|
179 | |
|
|
180 | EXTEND (SP, 2); |
|
|
181 | PUSHs (sv_2mortal (newRV_noinc ((SV *)about))); |
|
|
182 | PUSHs (sv_2mortal (newRV_noinc ((SV *)excl))); |
|
|
183 | } |
|
|
184 | |
|
|