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Defensively guard against calling malloc() with a size of zero.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155661 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ted Kremenek 2012-04-26 20:54:27 +00:00
parent 9da7892fbe
commit 06e950ecb2
1 changed files with 9 additions and 0 deletions
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9
runtime/libprofile/CommonProfiling.c
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@ -65,6 +65,15 @@ int save_arguments(int argc, const char **argv) {
for (Length = 0, i = 0; i != (unsigned)argc; ++i)
Length += strlen(argv[i])+1;
// Defensively check for a zero length, even though this is unlikely
// to happen in practice. This avoids calling malloc() below with a
// size of 0.
if (Length == 0) {
SavedArgs = 0;
SavedArgsLength = 0;
return argc;
}
SavedArgs = (char*)malloc(Length);
for (Length = 0, i = 0; i != (unsigned)argc; ++i) {
unsigned Len = strlen(argv[i]);