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Clean up and ensure proper usage of alloca()

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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
This commit is contained in:
Kinsey Moore
2012-07-31 20:21:43 +00:00
parent 6c23a60f80
commit 9b16c8b0f6
64 changed files with 317 additions and 399 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
utils/extconf.c
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@@ -5812,7 +5812,7 @@ static void pbx_substitute_variables_helper_full(struct ast_channel *c, struct v
whereweare += (len + 3);
if (!var)
var = alloca(VAR_BUF_SIZE);
var = ast_alloca(VAR_BUF_SIZE);
/* Store variable name (and truncate) */
ast_copy_string(var, vars, len + 1);
@@ -5820,7 +5820,7 @@ static void pbx_substitute_variables_helper_full(struct ast_channel *c, struct v
/* Substitute if necessary */
if (needsub) {
if (!ltmp)
ltmp = alloca(VAR_BUF_SIZE);
ltmp = ast_alloca(VAR_BUF_SIZE);
memset(ltmp, 0, VAR_BUF_SIZE);
pbx_substitute_variables_helper_full(c, headp, var, ltmp, VAR_BUF_SIZE - 1);
@@ -5830,7 +5830,7 @@ static void pbx_substitute_variables_helper_full(struct ast_channel *c, struct v
}
if (!workspace)
workspace = alloca(VAR_BUF_SIZE);
workspace = ast_alloca(VAR_BUF_SIZE);
workspace[0] = '\0';
@@ -5887,7 +5887,7 @@ static void pbx_substitute_variables_helper_full(struct ast_channel *c, struct v
whereweare += (len + 3);
if (!var)
var = alloca(VAR_BUF_SIZE);
var = ast_alloca(VAR_BUF_SIZE);
/* Store variable name (and truncate) */
ast_copy_string(var, vars, len + 1);
@@ -5895,7 +5895,7 @@ static void pbx_substitute_variables_helper_full(struct ast_channel *c, struct v
/* Substitute if necessary */
if (needsub) {
if (!ltmp)
ltmp = alloca(VAR_BUF_SIZE);
ltmp = ast_alloca(VAR_BUF_SIZE);
memset(ltmp, 0, VAR_BUF_SIZE);
pbx_substitute_variables_helper_full(c, headp, var, ltmp, VAR_BUF_SIZE - 1);