http://llvm.org/bugs/show_bug.cgi?id=20066
Bug ID: 20066
Summary: Check undefined init_priority static object dependency
Product: clang
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Static Analyzer
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Example:
header.h:
extern int a;
extern int b;
a.cpp:
#include "header.h"
int a = 2;
b.cpp:
#include "header.h"
int b = a;
main.cpp:
#include <stdio.h>
#include "header.h"
__attribute__((constructor))
static void init() {
printf("init: %i %i\n", a, b);
}
int main() {}
---
a and b will both get the same init_priority (I think it's
DEFAULT_INIT_PRIORITY = 65535), and thus it's not well defined whether a or b
is initialized first.
I would like to have a check, if the initialization of a global/static variable
depends on another global/static variable (int b = a), its init_priority must
be a bigger value than of all its dependencies.
---
In case that you wont implement this feature in the (near) future, maybe you
can give some guidance about what I need to do to implement such a static check
myself.
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