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Clean up and ensure proper usage of alloca()
This replaces all calls to alloca() with ast_alloca() which calls gcc's __builtin_alloca() to avoid BSD semantics and removes all NULL checks on memory allocated via ast_alloca() and ast_strdupa(). (closes issue ASTERISK-20125) Review: https://reviewboard.asterisk.org/r/2032/ Patch-by: Walter Doekes (wdoekes) ........ Merged revisions 370642 from http://svn.asterisk.org/svn/asterisk/branches/1.8 ........ Merged revisions 370643 from http://svn.asterisk.org/svn/asterisk/branches/10 git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@370655 65c4cc65-6c06-0410-ace0-fbb531ad65f3
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@@ -236,7 +236,7 @@ static int _while_exec(struct ast_channel *chan, const char *data, int end)
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condition = ast_strdupa(data);
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size = strlen(ast_channel_context(chan)) + strlen(ast_channel_exten(chan)) + 32;
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my_name = alloca(size);
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my_name = ast_alloca(size);
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memset(my_name, 0, size);
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snprintf(my_name, size, "%s_%s_%d", ast_channel_context(chan), ast_channel_exten(chan), ast_channel_priority(chan));
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@@ -281,7 +281,7 @@ static int _while_exec(struct ast_channel *chan, const char *data, int end)
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if (!end && !while_pri) {
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char *goto_str;
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size = strlen(ast_channel_context(chan)) + strlen(ast_channel_exten(chan)) + 32;
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goto_str = alloca(size);
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goto_str = ast_alloca(size);
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memset(goto_str, 0, size);
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snprintf(goto_str, size, "%s,%s,%d", ast_channel_context(chan), ast_channel_exten(chan), ast_channel_priority(chan));
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pbx_builtin_setvar_helper(chan, varname, goto_str);
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@@ -293,7 +293,7 @@ static int _while_exec(struct ast_channel *chan, const char *data, int end)
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if (! pbx_builtin_getvar_helper(chan, end_varname)) {
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char *goto_str;
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size = strlen(ast_channel_context(chan)) + strlen(ast_channel_exten(chan)) + 32;
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goto_str = alloca(size);
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goto_str = ast_alloca(size);
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memset(goto_str, 0, size);
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snprintf(goto_str, size, "%s,%s,%d", ast_channel_context(chan), ast_channel_exten(chan), ast_channel_priority(chan)+1);
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pbx_builtin_setvar_helper(chan, end_varname, goto_str);
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