| From a9bb29a4e9b478f9b126e483467ce9031c33fe4f Mon Sep 17 00:00:00 2001 |
| From: Juro Bystricky <juro.bystricky@intel.com> |
| Date: Mon, 19 Mar 2018 22:31:20 -0700 |
| Subject: [PATCH 36/40] fix segmentation fault in precompiled header generation |
| |
| Prevent a segmentation fault which occurs when using incorrect |
| structure trying to access name of some named operators, such as |
| CPP_NOT, CPP_AND etc. "token->val.node.spelling" cannot be used in |
| those cases, as is may not be initialized at all. |
| |
| [YOCTO #11738] |
| |
| Upstream-Status: Pending |
| |
| Signed-off-by: Juro Bystricky <juro.bystricky@intel.com> |
| Signed-off-by: Khem Raj <raj.khem@gmail.com> |
| --- |
| libcpp/lex.c | 26 +++++++++++++++++++++----- |
| 1 file changed, 21 insertions(+), 5 deletions(-) |
| |
| diff --git a/libcpp/lex.c b/libcpp/lex.c |
| index 37c365a3560..63480048db6 100644 |
| --- a/libcpp/lex.c |
| +++ b/libcpp/lex.c |
| @@ -3279,11 +3279,27 @@ cpp_spell_token (cpp_reader *pfile, const cpp_token *token, |
| spell_ident: |
| case SPELL_IDENT: |
| if (forstring) |
| - { |
| - memcpy (buffer, NODE_NAME (token->val.node.spelling), |
| - NODE_LEN (token->val.node.spelling)); |
| - buffer += NODE_LEN (token->val.node.spelling); |
| - } |
| + { |
| + if (token->type == CPP_NAME) |
| + { |
| + memcpy (buffer, NODE_NAME (token->val.node.spelling), |
| + NODE_LEN (token->val.node.spelling)); |
| + buffer += NODE_LEN (token->val.node.spelling); |
| + break; |
| + } |
| + /* NAMED_OP, cannot use node.spelling */ |
| + if (token->flags & NAMED_OP) |
| + { |
| + const char *str = cpp_named_operator2name (token->type); |
| + if (str) |
| + { |
| + size_t len = strlen(str); |
| + memcpy(buffer, str, len); |
| + buffer += len; |
| + } |
| + break; |
| + } |
| + } |
| else |
| buffer = _cpp_spell_ident_ucns (buffer, token->val.node.node); |
| break; |
| -- |
| 2.21.0 |
| |