1 /* Copyright (C) 2021 Free Software Foundation, Inc.
4 This file is part of GNU Binutils.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
22 * Routines for managing the target's environment array
26 #include "descendants.h"
28 #define MAX_LD_PRELOADS 2
30 /* TprintfT(<level>,...) definitions. Adjust per module as needed */
31 #define DBG_LT0 0 // for high-level configuration, unexpected errors/warnings
32 #define DBG_LT1 1 // for configuration details, warnings
37 /* original environment settings to be saved for later restoration */
38 static char *sp_preloads[MAX_LD_PRELOADS];
39 static char *sp_libpaths[MAX_LD_PRELOADS];
42 static const char *SP_ENV[];
43 static const char *LD_ENV[];
44 static const char *SP_PRELOAD[];
45 static const char *LD_PRELOAD[];
46 static const char *SP_LIBRARY_PATH[];
47 static const char *LD_LIBRARY_PATH[];
48 static int NUM_SP_ENV_VARS;
49 static int NUM_LD_ENV_VARS;
50 static int NUM_SP_PRELOADS;
51 static int NUM_LD_PRELOADS;
52 static int NUM_SP_LIBPATHS;
53 static int NUM_LD_LIBPATHS;
55 static const char *SP_ENV[] = {
56 SP_COLLECTOR_PARAMS, /* data descriptor */
57 SP_COLLECTOR_EXPNAME, /* experiment name */
58 SP_COLLECTOR_FOLLOW_SPEC, /* linetrace */
59 SP_COLLECTOR_FOUNDER, /* determine founder exp */
60 SP_PRELOAD_STRINGS, /* LD_PRELOADs for data collection */
61 SP_LIBPATH_STRINGS, /* LD_LIBRARY_PATHs for data collection */
62 "SP_COLLECTOR_TRACELEVEL", /* tprintf */
64 "SP_COLLECTOR_SIGACTION", /* dispatcher, hwprofile */
67 /* LD_DEBUG=audit,bindings,detail */
72 static const char *LD_ENV[] = {
73 LD_PRELOAD_STRINGS, /* LD_PRELOADs */
74 LD_LIBPATH_STRINGS, /* LD_LIBRARY_PATHs */
75 JAVA_TOOL_OPTIONS, /* enable -agentlib:collector for JVMTI */
79 static const char *SP_PRELOAD[] = {
84 static const char *LD_PRELOAD[] = {
89 static const char *SP_LIBRARY_PATH[] = {
93 static const char *LD_LIBRARY_PATH[] = {
99 __collector_env_save_preloads ()
101 /* save the list of SP_PRELOADs */
103 for (v = 0; SP_PRELOAD[v]; v++)
105 sp_preloads[v] = __collector_strdup (CALL_UTIL (getenv)(SP_PRELOAD[v]));
106 TprintfT (DBG_LT3, "__collector_env_save_preloads: %s=%s\n", SP_PRELOAD[v], sp_preloads[v]);
109 for (v = 0; SP_LIBRARY_PATH[v]; v++)
111 sp_libpaths[v] = __collector_strdup (CALL_UTIL (getenv)(SP_LIBRARY_PATH[v]));
112 TprintfT (DBG_LT4, "__collector_env_save_preloads: %s=%s\n", SP_LIBRARY_PATH[v],
113 sp_libpaths[v] ? sp_libpaths[v] : "NULL");
116 for (v = 0; LD_PRELOAD[v]; v++)
119 for (v = 0; LD_LIBRARY_PATH[v]; v++)
122 for (v = 0; SP_ENV[v]; v++)
125 for (v = 0; LD_ENV[v]; v++)
130 /* free the memory involved in backing up the environment */
132 __collector_env_backup_free ()
135 TprintfT (DBG_LT2, "env_backup_free()\n");
136 for (v = 0; sp_env_backup[v]; v++)
138 TprintfT (DBG_LT2, "env_backup_free():sp_env_backup[%d]=%s \n", v, sp_env_backup[v]);
139 __collector_freeCSize (__collector_heap, (char *) sp_env_backup[v], __collector_strlen (sp_env_backup[v]) + 1);
141 __collector_freeCSize (__collector_heap, (char**) sp_env_backup,
142 (NUM_SP_ENV_VARS + NUM_LD_ENV_VARS + 1) * sizeof (char*));
146 __collector_env_backup ()
148 TprintfT (DBG_LT2, "env_backup_()\n");
149 char **backup = __collector_env_allocate (NULL, 1);
150 __collector_env_update (backup);
151 TprintfT (DBG_LT2, "env_backup_()\n");
156 function: env_prepend()
157 given an <old_str>, check to see if <str>
158 is already defined by it. If not, allocate
159 a new string and concat <envvar>=<str><separator><old_str>
161 old_str: original string
162 str: substring to prepend
163 return: pointer to updated string or NULL if string was not updated.
166 env_prepend (const char *envvar, const char *str, const char *separator,
169 if (!envvar || *envvar == 0 || !str || *str == 0)
172 TprintfT (DBG_LT2, "env_prepend(\"%s\", \"%s\", \"%s\", \"%s\") -- nothing to do\n",
173 envvar, str, separator, old_str);
177 TprintfT (DBG_LT2, "env_prepend(\"%s\", \"%s\", \"%s\", \"%s\")\n",
178 envvar, str, separator, old_str);
181 if (!old_str || *old_str == 0)
183 strsz = __collector_strlen (envvar) + 1 + __collector_strlen (str) + 1;
184 ev = (char*) __collector_allocCSize (__collector_heap, strsz, 1);
187 CALL_UTIL (snprintf)(ev, strsz, "%s=%s", envvar, str);
188 assert (__collector_strlen (ev) + 1 == strsz);
191 TprintfT (DBG_LT2, "env_prepend(): could not allocate memory\n");
195 char *p = CALL_UTIL (strstr)(old_str, str);
198 TprintfT (DBG_LT2, "env_prepend(): %s=%s was already set\n",
202 strsz = __collector_strlen (envvar) + 1 + __collector_strlen (str) +
203 __collector_strlen (separator) + __collector_strlen (old_str) + 1;
204 ev = (char*) __collector_allocCSize (__collector_heap, strsz, 1);
207 CALL_UTIL (snprintf)(ev, strsz, "%s=%s%s%s", envvar, str, separator, old_str);
208 assert (__collector_strlen (ev) + 1 == strsz);
211 TprintfT (DBG_LT2, "env_prepend(): could not allocate memory\n");
213 TprintfT (DBG_LT2, "env_prepend(\"%s\", \"%s\", \"%s\", \"%s\") returns \"%s\"\n",
214 envvar, str, separator, old_str, (ev == NULL ? "NULL" : ev));
219 function: putenv_prepend()
220 get environment variable <envvar>, check to see if <str>
221 is already defined by it. If not prepend <str>
222 and put it back to environment.
224 envvar: environment variable
225 str: substring to find
226 return: 0==success, nonzero on failure.
229 putenv_prepend (const char *envvar, const char *str, const char *separator)
231 if (!envvar || *envvar == 0)
233 const char * old_str = CALL_UTIL (getenv)(envvar);
234 char * newstr = env_prepend (envvar, str, separator, old_str);
236 // now put the new variable into the environment
237 if (CALL_UTIL (putenv)(newstr) != 0)
239 TprintfT (DBG_LT2, "putenv_prepend(): ERROR %s is not set!\n", newstr);
246 function: env_strip()
247 Finds substr in origstr; Removes
248 all characters from previous ':' or ' '
249 up to and including any trailing ':' or ' '.
251 env: environment variable contents
252 str: substring to find
253 return: count of instances removed from env
256 env_strip (char *origstr, const char *substr)
260 if (origstr == NULL || substr == NULL || *substr == 0)
262 while ((p = q = CALL_UTIL (strstr)(origstr, substr)))
264 p += __collector_strlen (substr);
265 while (*p == ':' || *p == ' ') /* strip trailing separator */
267 while (*q != ':' && *q != ' ' && *q != '=' && q != origstr) /* strip path */
269 if (q != origstr) /* restore leading separator (if any) */
271 __collector_strlcpy (q, p, __collector_strlen (p) + 1);
278 function: env_ld_preload_strip()
279 Removes known libcollector shared objects from envv.
281 var: shared object name (leading characters don't have to match)
282 return: 0 = so's removed, non-zero = so's not found.
285 env_ld_preload_strip (char *envv)
287 if (!envv || *envv == 0)
289 TprintfT (DBG_LT2, "env_ld_preload_strip(): WARNING - envv is NULL\n");
292 for (int v = 0; SP_PRELOAD[v]; v++)
293 if (env_strip (envv, sp_preloads[v]))
295 if (line_mode != LM_CLOSED)
296 TprintfT (DBG_LT2, "env_ld_preload_strip(): WARNING - could not strip SP_PRELOADS from '%s'\n",
302 __collector_env_print (char * label)
305 TprintfT (DBG_LT2, "__collector_env_print(%s)\n", label);
306 for (int v = 0; v < MAX_LD_PRELOADS; v++)
307 TprintfT (DBG_LT2, " %s sp_preloads[%d] (0x%p)=%s\n", label,
308 v, sp_preloads[v], (sp_preloads[v] == NULL ? "NULL" : sp_preloads[v]));
309 for (int v = 0; SP_ENV[v]; v++)
311 char *s = CALL_UTIL (getenv)(SP_ENV[v]);
314 TprintfT (DBG_LT2, " %s SP_ENV[%d] (0x%p): %s=\"%s\"\n", label, v, SP_ENV[v], SP_ENV[v], s);
316 for (int v = 0; LD_ENV[v]; v++)
318 char *s = CALL_UTIL (getenv)(LD_ENV[v]);
321 TprintfT (DBG_LT2, " %s LD_ENV[%d] (0x%p): %s=\"%s\"\n", label, v, LD_ENV[v], LD_ENV[v], s);
327 __collector_env_printall (char *label, char *envp[])
330 TprintfT (DBG_LT2, "__collector_env_printall(%s): environment @ 0x%p\n", label, envp);
331 for (int i = 0; envp[i]; i++)
332 Tprintf (DBG_LT2, "\tenv[%d]@0x%p == %s\n", i, envp[i], envp[i]);
336 /* match collector environment variable */
338 env_match (char *envp[], const char *envvar)
342 TprintfT (DBG_LT1, "env_match(%s): NULL envp!\n", envvar);
346 while ((envp[i] != NULL) && (__collector_strStartWith (envp[i], envvar)))
348 if ((envp[i] == NULL) || (envp[i][__collector_strlen (envvar)] != '='))
349 TprintfT (DBG_LT4, "env_match(): @%p []%s not defined in envp\n", envp, envvar);
352 TprintfT (DBG_LT4, "env_match(): @%p [%d]%s defined in envp\n", envp, i, envp[i]);
356 TprintfT (DBG_LT1, "env_match(%s): found in slot %d\n", envvar, match);
360 /* allocate new environment with collector variables */
361 /* 1) copy all current envp[] ptrs into a new array, coll_env[] */
362 /* 2) if collector-related env ptrs not in envp[], append them to coll_env */
363 /* from processes' "environ" (allocate_env==1) */
364 /* or from sp_env_backup (allocate_env==0)*/
365 /* If they already exist in envp, probably is an error... */
366 /* 3) return coll_env */
368 /* __collector__env_update() need be called after this to set LD_ENV*/
370 __collector_env_allocate (char *const old_env[], int allocate_env)
372 extern char **environ; /* the process' actual environment */
373 char **new_env; /* a new environment for collection */
374 TprintfT (DBG_LT3, "__collector_env_allocate(old_env=0x%p %s environ=0x%p)\n",
375 old_env, (old_env == environ) ? "==" : "!=", environ);
376 /* set up a copy of the provided old_env for collector use */
377 int old_env_size = 0;
379 /* determine number of (used) slots in old_env */
381 while (old_env[old_env_size] != NULL)
383 /* allocate a new vector with additional slots */
384 int new_env_alloc_sz = old_env_size + NUM_SP_ENV_VARS + NUM_LD_ENV_VARS + 1;
385 new_env = (char**) __collector_allocCSize (__collector_heap, new_env_alloc_sz * sizeof (char*), 1);
388 TprintfT (DBG_LT4, "__collector_env_allocate(): old_env has %d entries, new_env @ 0x%p\n", old_env_size, new_env);
390 /* copy provided old_env pointers to new collector environment */
391 int new_env_size = 0;
392 for (new_env_size = 0; new_env_size < old_env_size; new_env_size++)
393 new_env[new_env_size] = old_env[new_env_size];
395 /* check each required environment variable, adding as required */
396 const char * env_var;
398 for (v = 0; (env_var = SP_ENV[v]) != NULL; v++)
400 if (env_match ((char**) old_env, env_var) == -1)
403 /* not found in old_env */
406 if ((idx = env_match (environ, env_var)) != -1)
408 /* found in environ */
409 TprintfT (DBG_LT4, "__collector_env_allocate(): [%d]%s env restored!\n",
410 new_env_size, environ[idx]);
411 int varsz = __collector_strlen (environ[idx]) + 1;
412 char * var = (char*) __collector_allocCSize (__collector_heap, varsz, 1);
415 __collector_strlcpy (var, environ[idx], varsz);
416 new_env[new_env_size++] = var;
420 /* not found in environ */
421 if ((__collector_strcmp (env_var, SP_COLLECTOR_PARAMS) == 0) ||
422 (__collector_strcmp (env_var, SP_COLLECTOR_EXPNAME) == 0))
423 TprintfT (DBG_LT1, "__collector_env_allocate(): note: %s environment variable not found\n",
429 if ((idx = env_match (sp_env_backup, env_var)) != -1)
431 /* found in backup */
432 TprintfT (DBG_LT4, "__collector_env_allocate(): [%d]%s env restored!\n",
433 new_env_size, sp_env_backup[idx]);
434 new_env[new_env_size++] = sp_env_backup[idx];
438 /* not found in environ */
439 if ((__collector_strcmp (env_var, SP_COLLECTOR_PARAMS) == 0) ||
440 (__collector_strcmp (env_var, SP_COLLECTOR_EXPNAME) == 0))
441 TprintfT (DBG_LT1, "__collector_env_allocate(): note: %s environment variable not found\n",
448 for (v = 0; (env_var = LD_ENV[v]) != NULL; v++)
450 if (env_match ((char**) old_env, env_var) == -1)
453 /* not found in old_env */
456 if ((idx = env_match (environ, env_var)) != -1)
458 /* found in environ */
459 TprintfT (DBG_LT4, "__collector_env_allocate(): [%d]%s env restored!\n",
460 new_env_size, environ[idx]);
462 int varsz = __collector_strlen (env_var) + 2;
463 char * var = (char*) __collector_allocCSize (__collector_heap, varsz, 1);
466 // assume __collector_env_update() will fill content of env_var
467 CALL_UTIL (snprintf)(var, varsz, "%s=", env_var);
468 new_env[new_env_size++] = var;
473 if ((idx = env_match (sp_env_backup, env_var)) != -1)
475 /* found in backup */
476 TprintfT (DBG_LT4, "__collector_env_allocate(): [%d]%s env restored!\n",
477 new_env_size, sp_env_backup[idx]);
478 new_env[new_env_size++] = sp_env_backup[idx];
484 /* ensure new_env vector ends with NULL */
485 new_env[new_env_size] = NULL;
486 assert (new_env_size <= new_env_alloc_sz);
487 TprintfT (DBG_LT4, "__collector_env_allocate(): new_env has %d entries (%d added), new_env=0x%p\n",
488 new_env_size, new_env_size - old_env_size, new_env);
489 if (new_env_size != old_env_size && !allocate_env)
490 __collector_log_write ("<event kind=\"%s\" id=\"%d\">%d</event>\n",
491 SP_JCMD_CWARN, COL_WARN_EXECENV, new_env_size - old_env_size);
492 __collector_env_printall ("__collector_env_allocate", new_env);
496 /* unset collection environment variables */
497 /* if they exist in env... */
498 /* 1) push non-collectorized version to env */
502 __collector_env_unset (char *envp[])
505 const char * env_name;
506 TprintfT (DBG_LT3, "env_unset(envp=0x%p)\n", envp);
509 for (v = 0; (env_name = LD_PRELOAD[v]); v++)
511 const char *env_val = CALL_UTIL (getenv)(env_name);
512 if (env_val && CALL_UTIL (strstr)(env_val, sp_preloads[v]))
514 size_t sz = __collector_strlen (env_name) + 1 + __collector_strlen (env_val) + 1;
515 char * ev = (char*) __collector_allocCSize (__collector_heap, sz, 1);
518 CALL_UTIL (snprintf)(ev, sz, "%s=%s", env_name, env_val);
519 assert (__collector_strlen (ev) + 1 == sz);
520 TprintfT (DBG_LT4, "env_unset(): old %s\n", ev);
521 env_ld_preload_strip (ev);
522 CALL_UTIL (putenv)(ev);
523 TprintfT (DBG_LT4, "env_unset(): new %s\n", ev);
526 // unset JAVA_TOOL_OPTIONS
527 env_name = JAVA_TOOL_OPTIONS;
528 const char * env_val = CALL_UTIL (getenv)(env_name);
529 if (env_val && CALL_UTIL (strstr)(env_val, COLLECTOR_JVMTI_OPTION))
531 size_t sz = __collector_strlen (env_name) + 1 + __collector_strlen (env_val) + 1;
532 char * ev = (char*) __collector_allocCSize (__collector_heap, sz, 1);
535 CALL_UTIL (snprintf)(ev, sz, "%s=%s", env_name, env_val);
536 assert (__collector_strlen (ev) + 1 == sz);
537 TprintfT (DBG_LT4, "env_unset(): old %s\n", ev);
538 env_strip (ev, COLLECTOR_JVMTI_OPTION);
539 CALL_UTIL (putenv)(ev);
540 TprintfT (DBG_LT4, "env_unset(): new %s\n", ev);
542 __collector_env_print ("__collector_env_unset");
546 __collector_env_printall ("__collector_env_unset, before", envp);
547 for (v = 0; (env_name = LD_PRELOAD[v]); v++)
549 int idx = env_match (envp, env_name);
552 char *env_val = envp[idx];
553 TprintfT (DBG_LT4, "env_unset(): old %s\n", env_val);
554 envp[idx] = "junk="; /* xxxx is it ok to use original string? */
555 env_ld_preload_strip (env_val);
557 TprintfT (DBG_LT4, "env_unset(): new %s\n", envp[idx]);
560 // unset JAVA_TOOL_OPTIONS
561 env_name = JAVA_TOOL_OPTIONS;
562 int idx = env_match(envp, env_name);
564 char *env_val = envp[idx];
565 TprintfT(DBG_LT4, "env_unset(): old %s\n", env_val);
566 envp[idx] = "junk="; /* xxxx is it ok to use original string? */
567 env_strip(env_val, COLLECTOR_JVMTI_OPTION);
569 TprintfT(DBG_LT4, "env_unset(): new %s\n", envp[idx]);
571 __collector_env_printall ("__collector_env_unset, after", envp );
575 /* update collection environment variables */
576 /* update LD_PRELOADs and push them */
579 __collector_env_update (char *envp[])
581 const char *env_name;
582 TprintfT (DBG_LT1, "__collector_env_update(envp=0x%p)\n", envp);
583 extern char **environ;
587 TprintfT (DBG_LT2, "__collector_env_update(envp=NULL)\n");
588 __collector_env_printall (" environ array, before", environ);
589 __collector_env_print (" env_update at entry ");
592 for (v = 0; (env_name = SP_ENV[v]) != NULL; v++)
594 if (env_match (environ, env_name) == -1)
597 if ((idx = env_match (sp_env_backup, env_name)) != -1)
599 unsigned strsz = __collector_strlen (sp_env_backup[idx]) + 1;
600 char *ev = (char*) __collector_allocCSize (__collector_heap, strsz, 1);
601 CALL_UTIL (snprintf)(ev, strsz, "%s", sp_env_backup[idx]);
602 if (CALL_UTIL (putenv)(ev) != 0)
603 TprintfT (DBG_LT2, "__collector_env_update(): ERROR %s is not set!\n",
608 __collector_env_print (" env_update after SP_ENV settings ");
610 /* LD_LIBRARY_PATH */
611 for (v = 0; (env_name = LD_LIBRARY_PATH[v]); v++)
612 /* assumes same index used between LD and SP vars */
613 if (putenv_prepend (env_name, sp_libpaths[v], ":"))
614 TprintfT (DBG_LT2, "collector: ERROR %s=%s could not be set\n",
615 env_name, sp_libpaths[v]);
616 __collector_env_print (" env_update after LD_LIBRARY_PATH settings ");
619 for (v = 0; (env_name = LD_PRELOAD[v]); v++)
620 /* assumes same index used between LD and SP vars */
621 if (putenv_prepend (env_name, sp_preloads[v], " "))
622 TprintfT (DBG_LT2, "collector: ERROR %s=%s could not be set\n",
623 env_name, sp_preloads[v]);
624 __collector_env_print (" env_update after LD_PRELOAD settings ");
626 /* JAVA_TOOL_OPTIONS */
628 if (putenv_prepend (JAVA_TOOL_OPTIONS, COLLECTOR_JVMTI_OPTION, " "))
629 TprintfT (DBG_LT2, "collector: ERROR %s=%s could not be set\n",
630 JAVA_TOOL_OPTIONS, COLLECTOR_JVMTI_OPTION);
631 __collector_env_print (" env_update after JAVA_TOOL settings ");
637 TprintfT (DBG_LT2, "__collector_env_update(envp=0x%p) not NULL\n", envp);
638 __collector_env_printall ("__collector_env_update, before", envp);
639 /* LD_LIBRARY_PATH */
640 for (v = 0; (env_name = LD_LIBRARY_PATH[v]); v++)
642 int idx = env_match (envp, env_name);
645 char *env_val = __collector_strchr (envp[idx], '=');
647 env_val++; /* skip '=' */
648 /* assumes same index used between LD and SP vars */
649 char *new_str = env_prepend (env_name, sp_libpaths[v],
657 for (v = 0; (env_name = LD_PRELOAD[v]); v++)
659 int idx = env_match (envp, env_name);
662 char *env_val = __collector_strchr (envp[idx], '=');
664 env_val++; /* skip '=' */
665 /* assumes same index used between LD and SP vars */
666 char *new_str = env_prepend (env_name, sp_preloads[v],
673 /* JAVA_TOOL_OPTIONS */
676 env_name = JAVA_TOOL_OPTIONS;
677 idx = env_match (envp, env_name);
680 char *env_val = __collector_strchr (envp[idx], '=');
682 env_val++; /* skip '=' */
683 char *new_str = env_prepend (env_name, COLLECTOR_JVMTI_OPTION,
690 __collector_env_printall ("__collector_env_update, after", environ);
694 /*------------------------------------------------------------- putenv */
695 int putenv () __attribute__ ((weak, alias ("__collector_putenv")));
696 int _putenv () __attribute__ ((weak, alias ("__collector_putenv")));
699 __collector_putenv (char * string)
701 if (CALL_UTIL (putenv) == __collector_putenv ||
702 CALL_UTIL (putenv) == NULL)
703 { // __collector_libc_funcs_init failed
704 CALL_UTIL (putenv) = (int(*)())dlsym (RTLD_NEXT, "putenv");
705 if (CALL_UTIL (putenv) == NULL || CALL_UTIL (putenv) == __collector_putenv)
706 CALL_UTIL (putenv) = (int(*)())dlsym (RTLD_DEFAULT, "putenv");
707 if (CALL_UTIL (putenv) == NULL || CALL_UTIL (putenv) == __collector_putenv)
709 TprintfT (DBG_LT2, "__collector_putenv(): ERROR: no pointer found.\n");
714 if (user_follow_mode == FOLLOW_NONE)
715 return CALL_UTIL (putenv)(string);
716 char * envp[] = {string, NULL};
717 __collector_env_update (envp);
718 return CALL_UTIL (putenv)(envp[0]);
721 /*------------------------------------------------------------- setenv */
722 int setenv () __attribute__ ((weak, alias ("__collector_setenv")));
723 int _setenv () __attribute__ ((weak, alias ("__collector_setenv")));
726 __collector_setenv (const char *name, const char *value, int overwrite)
728 if (CALL_UTIL (setenv) == __collector_setenv ||
729 CALL_UTIL (setenv) == NULL)
730 { // __collector_libc_funcs_init failed
731 CALL_UTIL (setenv) = (int(*)())dlsym (RTLD_NEXT, "setenv");
732 if (CALL_UTIL (setenv) == NULL || CALL_UTIL (setenv) == __collector_setenv)
733 CALL_UTIL (setenv) = (int(*)())dlsym (RTLD_DEFAULT, "setenv");
734 if (CALL_UTIL (setenv) == NULL || CALL_UTIL (setenv) == __collector_setenv)
736 TprintfT (DBG_LT2, "__collector_setenv(): ERROR: no pointer found.\n");
741 if (user_follow_mode == FOLLOW_NONE || !overwrite)
742 return CALL_UTIL (setenv)(name, value, overwrite);
743 size_t sz = __collector_strlen (name) + 1 + __collector_strlen (value) + 1;
744 char *ev = (char*) __collector_allocCSize (__collector_heap, sz, 1);
746 return CALL_UTIL (setenv)(name, value, overwrite);
747 CALL_UTIL (snprintf)(ev, sz, "%s=%s", name, value);
748 char * envp[] = {ev, NULL};
749 __collector_env_update (envp);
752 __collector_freeCSize (__collector_heap, ev, sz);
753 return CALL_UTIL (setenv)(name, value, overwrite);
757 char *env_val = __collector_strchr (envp[0], '=');
761 env_val++; /* skip '=' */
763 return CALL_UTIL (setenv)(envp[0], env_val, overwrite);
767 /*------------------------------------------------------------- unsetenv */
768 int unsetenv () __attribute__ ((weak, alias ("__collector_unsetenv")));
769 int _unsetenv () __attribute__ ((weak, alias ("__collector_unsetenv")));
772 __collector_unsetenv (const char *name)
774 if (CALL_UTIL (unsetenv) == __collector_unsetenv ||
775 CALL_UTIL (unsetenv) == NULL)
776 { // __collector_libc_funcs_init failed
777 CALL_UTIL (unsetenv) = (int(*)())dlsym (RTLD_NEXT, "unsetenv");
778 if (CALL_UTIL (unsetenv) == NULL || CALL_UTIL (unsetenv) == __collector_unsetenv)
779 CALL_UTIL (unsetenv) = (int(*)())dlsym (RTLD_DEFAULT, "unsetenv");
780 if (CALL_UTIL (unsetenv) == NULL || CALL_UTIL (unsetenv) == __collector_unsetenv)
782 TprintfT (DBG_LT2, "__collector_unsetenv(): ERROR: no pointer found.\n");
787 int ret = CALL_UTIL (unsetenv)(name);
788 if (user_follow_mode == FOLLOW_NONE)
790 TprintfT (DBG_LT2, "__collector_unsetenv(): %d.\n", user_follow_mode);
791 size_t sz = __collector_strlen (name) + 1 + 1;
792 char *ev = (char*) __collector_allocCSize (__collector_heap, sz, 1);
795 CALL_UTIL (snprintf)(ev, sz, "%s=", name);
796 char * envp[] = {ev, NULL};
797 __collector_env_update (envp);
799 __collector_freeCSize (__collector_heap, ev, sz);
801 CALL_UTIL (putenv)(envp[0]);
805 /*------------------------------------------------------------- clearenv */
806 int clearenv () __attribute__ ((weak, alias ("__collector_clearenv")));
809 __collector_clearenv (void)
811 if (CALL_UTIL (clearenv) == __collector_clearenv || CALL_UTIL (clearenv) == NULL)
813 /* __collector_libc_funcs_init failed; look up clearenv now */
814 CALL_UTIL (clearenv) = (int(*)())dlsym (RTLD_NEXT, "clearenv");
815 if (CALL_UTIL (clearenv) == NULL || CALL_UTIL (clearenv) == __collector_clearenv)
816 /* still not found; try again */
817 CALL_UTIL (clearenv) = (int(*)())dlsym (RTLD_DEFAULT, "clearenv");
818 if (CALL_UTIL (clearenv) == NULL || CALL_UTIL (clearenv) == __collector_clearenv)
820 /* still not found -- a fatal error */
821 TprintfT (DBG_LT2, "__collector_clearenv(): ERROR: %s\n", dlerror ());
822 CALL_UTIL (fprintf)(stderr, "__collector_clearenv(): ERROR: %s\n", dlerror ());
827 int ret = CALL_UTIL (clearenv)();
828 if (user_follow_mode == FOLLOW_NONE)
830 if (sp_env_backup == NULL)
832 TprintfT (DBG_LT2, "__collector_clearenv: ERROR sp_env_backup is not set!\n");
835 for (int v = 0; v < NUM_SP_ENV_VARS + NUM_LD_ENV_VARS; v++)
836 if (sp_env_backup[v] && CALL_UTIL (putenv)(sp_env_backup[v]) != 0)
837 TprintfT (DBG_LT2, "__collector_clearenv: ERROR %s is not set!\n",