最主要的原因是在TAU G2中,类或结构体变量都是看作指针的,如果在WATCH窗口看这些变量,在访问变量前,它们都是null,而在赋值之后会显示变量的地址,这和C语言对指针变量的处理基本相同。所以在给这些变量第1次赋值的时候就会报告访问空指针。如果想避免这个问题,就应该在赋值前先使用new关键词分配空间。如: CArray<...
最主要的原因是在TAU G2中,类或结构体变量都是看作指针的,如果在WATCH窗口看这些变量,在访问变量前,它们都是null,而在赋值之后会显示变量的地址,这和C语言对指针变量的处理基本相同。所以在给这些变量第1次赋值的时候就会报告访问空指针。如果想避免这个问题,就应该在赋值前先使用new关键词分配空间。如: CArray<...
最主要的原因是在TAU G2中,类或结构体变量都是看作指针的,如果在WATCH窗口看这些变量,在访问变量前,它们都是null,而在赋值之后会显示变量的地址,这和C语言对指针变量的处理基本相同。所以在给这些变量第1次赋值的时候就会报告访问空指针。如果想避免这个问题,就应该在赋值前先使用new关键词分配空间。如: CArray<...
if (myPointer != nullptr) /*do something with it*/ ; That should help you avoid the problem and hopefully locate it so that you can prevent trying to use a nullpointer. Oct 27, 2016 at 5:09pm KenBoneSlice(5) I may have phrased that wrong, but it is in the while loop of Queue...
Thanks in advance, Lutz. Tags: None Phlip #2 May 8 '07, 12:25 PM Re: Dereferencing a null-pointer allowed? Lutz Richter wrote: B* b = 0; cout << b->Get(); } I wonder if this is allowed. I did not have any problem with any compiler yet. It works! But is this guar...
After a lot of reading, I have concluded that I am dereferencing a Null Pointer and then trying to use it after this. However, nowhere in my code do I overtly set a pointer to 0 or NULL. I've read that return values from methods (particularly if using "if" statements) can set poi...
A pointer and the pointed-to data are both checked for NULL correctly, but a debug/warning message that is printed uses the pointer that might be NULL, as shown in the following example:For example if varA is NULL:Copy if (NULL == varA || NULL == varA->part1) printf("Bad arg ...
applying fixups BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffffa051ab3c>] dmp_get_dmpsymbols+0x1c/0x1a0 [dmpCLARiiON] PGD 82935c067 PUD 82a53f067 PMD 0 Oops: 0000 [#1] SMP last sysfs file: /sys/devices/system/cpu/cpu31/cache/index2/shared_cpu_...
Problem: Coverity warns about dereferencing NULL pointer. Solution: Bail out if vim_strrchr() returns NULL. *** CID 1616019: (NULL_RETURNS) /src/help.c: 834 in fix_help_buffer() 828 ...
I have unintentionally raised a large debate recently concerning the question if it is legal in C/C++ to use the &P->m_foo expression with P being a null pointer. The programmers' community divided into two camps. The first claimed with confidence that it wasn't legal while the others ...