https://llvm.org/bugs/show_bug.cgi?id=30828
Bug ID: 30828
Summary: __attribute__((notnull)) in prototype's parameter is
forgotten after function definition
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: t...@iki.fi
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Using __attribute__((notnull)) in prototype's parameter works as long as the
function definition hasn't been seen. Afterwards the notnull attribute is lost
and no more warnings are given. This same problem doesn't happen when using
__attribute__((notnull(1))) style.
Example:
//static void foo(char *p) __attribute__((nonnull(1))); // 2 warnings
static void foo(char *p __attribute__((nonnull))); // 1 warning
static void bar(char *p)
{
foo(0); // always gets a warning
}
static void foo(char *p) { }
int main(void)
{
foo(0); // warning missing here
bar(0);
return 0;
}
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