Questions regarding initialization code of static members
Questions tagged [static-initialization]
292 questions
17
votes
2 answers
When is initialization of global constants with external linkage safe from static initialization order fiasco?
Consider the following example:
tt.h declares a global constant with external linkages extern int g_TRAGIC;
tt.cpp defines g_TRAGIC as follows const int g_TRAGIC = 0xF001;
my.cpp wants to use it to define its own global constant const int g_MAGIC…
Lothar
- 830
- 6
- 21
17
votes
5 answers
java static initialization with inheritance
public class Main {
public static void main(String[] args) {
System.out.println(B.x);
}
}
class A {
public static String x = "x";
}
class B extends A {
static {
System.out.print("Inside B.");
}
}
Question: Why…
Taras Koval
- 173
- 1
- 4
16
votes
2 answers
Initializing circular data in C. Is this valid C code according to any standard?
I wanted to see if I could initialize a global variable to point to itself:
#include
struct foo { struct foo *a, *b; } x = { &x, &x };
int main()
{
printf("&x = %p, x.a = %p, x.b = %p\n", &x, x.a, x.b);
return 0;
}
This code…
Matt
- 17,895
- 16
- 55
- 102
14
votes
3 answers
Static Initialization in Go?
I'm currently working on the Go Lang tutorial, but ran into problem with one of the exercises:
https://tour.golang.org/methods/23
The exercise has me implement a ROT13 cipher. I decided to implement the cipher using a map from a byte to its rotated…
jlhawn
- 343
- 1
- 3
- 8
14
votes
1 answer
g++, static initialization and -nostdlib
Compiling / linking with -nostdlib seems to prevent static initialization, even if I add my own crti.s and crtn.s with .init/.fini sections.
Are there workarounds to make g++ generate static initialization code that is inserted in .init or that I…
Thomas
- 303
- 1
- 3
- 11
13
votes
1 answer
Finding out whether static initialization is over
The abridged problem (Y)
Suppose you need to know, from within a function, whether this function has been called as part of the initialization of a static object, or not. Is there a standard or platform-specific way to do so?
The backstory (X)
I'm…
Quentin
- 58,778
- 7
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- 175
12
votes
3 answers
static const array gets initialized dynamically in MSVC?
We have a table we'd like to initialize statically, however MSVC (2015.1, and older versions too) generates a dynamic initializer instead.
Here's the simplified code demonstrating the issue:
#define idaapi __stdcall
#define MAXSTR 1024
typedef int…
Igor Skochinsky
- 22,978
- 1
- 62
- 101
12
votes
1 answer
Android 6.0 (Marshmallow) static initialization exception on getDeclaredField() in svg-android library
I'm having some serious problem with this code, from svg-android:
public class ParserHelper {
private static final Field STRING_CHARS;
static {
try {
STRING_CHARS = String.class.getDeclaredField("value"); //<-- exception here
…
Seraphim's
- 11,736
- 17
- 80
- 126
12
votes
4 answers
Why should I not initialize static variable in header?
So, let's say I have a header like this:
#ifndef BASECLASS_H
#define BASECLASS_H
class BaseClass
{
public:
static int getX(){return x;}
private:
static int x;
};
int BaseClass::x = 10;
#endif
I have heard many times that…
user3496846
- 1,295
- 1
- 14
- 23
12
votes
2 answers
Java Legal Forward Referencing
Is the following code the case of legal forward referencing? if yes why?
public class MyClass
{
private static int x = getValue();
private static int y = 5;
private static int getValue()
{
return y;
}
public static void main(String[]…
Vibhor
- 211
- 3
- 7
11
votes
7 answers
Can I access a static local while it is being constructed in C++?
Static locals are guaranteed to be instantiated at first use by the C++ standard. However, I'm wondering what happens if I access a static local object while it is beeing constructed. I assume that this is UB.
But what are the best practices to…
king_nak
- 10,729
- 30
- 55
11
votes
2 answers
non-deferred static member initialization for templates in gcc?
Does gcc have any guarantees about static member initialization timing, especially regarding template classes?
I want to know if I can get a hard guarantee that static members (PWrap_T::p_s) will be initialized before main(), when classes are…
Jeff
- 3,347
- 2
- 22
- 33
11
votes
7 answers
Static variable initialization?
I want to know why exactly static variables in C, C++ and Java are initialized by zero by default? And why this is not true for local variables?
Sachin Chourasiya
- 18,417
- 31
- 80
- 95
11
votes
2 answers
Application-wide configuration of Lambdaj FinalClassArgumentCreators. Where and how to do it?
We have a problem with configuring lambdaj to work with Joda Time. Since LocalDate is a final class, Lambdaj needs to be initialized like following: (see bug 70)
public class LocalDateArgumentCreator implements FinalClassArgumentCreator…
RJo
- 12,543
- 5
- 26
- 63
10
votes
3 answers
Initialize static std::map with non copyable value in a uniformed inline initialization
I'd like to initialize a static std::map where the value is not copyable. I'll call my class ValueClass. ValueClass has an std::unique_ptr as private member and I even ensure that ValueClass is not copyable by extending non_copyable that looks like…
U. Bulle
- 647
- 5
- 16