reference, declarationdefinition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced
    1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
//===-- main.cpp ------------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// I made this example after noting that I was unable to display an unsized
// static class array. It turns out that gcc 4.2 will emit DWARF that correctly
// describes the PointType, but it will incorrectly emit debug info for the
// "g_points" array where the following things are wrong:
//  - the DW_TAG_array_type won't have a subrange info
//  - the DW_TAG_variable for "g_points" won't have a valid byte size, so even
//    though we know the size of PointType, we can't infer the actual size
//    of the array by dividing the size of the variable by the number of
//    elements.

#include <stdio.h>

typedef struct PointType
{
    int x, y;
} PointType;

class A
{
public:
    static PointType g_points[];
};

PointType A::g_points[] = 
{
    {    1,    2 },
    {   11,   22 }
};

static PointType g_points[] = 
{
    {    3,    4 },
    {   33,   44 }
};

int
main (int argc, char const *argv[])
{
    const char *hello_world = "Hello, world!";
    printf ("A::g_points[1].x = %i\n", A::g_points[1].x); // Set break point at this line.
    printf ("::g_points[1].x = %i\n", g_points[1].x);
    printf ("%s\n", hello_world);
    return 0;
}