Editing 138: Pointers
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This comic is about a play on the dual meaning of the word "pointer." [[Cueball]] is playing a video game, but he seems to be stuck. So he asks [[Black Hat]] for a few tips ("pointers") to progress in the game. Black Hat is, as usual, annoying, so he spits out a couple of (seemingly random) 32-bit hexadecimal addresses, which are "{{w|Pointer (computer programming)|pointers}}" in a programming language. These pointers are used to access a certain location in the computer's memory in order to fulfill a task; however, this would not be helpful in improving his playing the game the normal way (though [[#Alternate Explanation|see below]]) by perhaps learning of a better weapon loadout, or a quicker route to achieve some mission goal. Ultimately, Cueball is then annoyed at [[Black Hat]] for not answering his question in a useful manner. | This comic is about a play on the dual meaning of the word "pointer." [[Cueball]] is playing a video game, but he seems to be stuck. So he asks [[Black Hat]] for a few tips ("pointers") to progress in the game. Black Hat is, as usual, annoying, so he spits out a couple of (seemingly random) 32-bit hexadecimal addresses, which are "{{w|Pointer (computer programming)|pointers}}" in a programming language. These pointers are used to access a certain location in the computer's memory in order to fulfill a task; however, this would not be helpful in improving his playing the game the normal way (though [[#Alternate Explanation|see below]]) by perhaps learning of a better weapon loadout, or a quicker route to achieve some mission goal. Ultimately, Cueball is then annoyed at [[Black Hat]] for not answering his question in a useful manner. | ||
| − | A {{w|segmentation fault}}, as referred to in the title text, is a result by accessing invalid memory addresses. If you define a pointer to an invalid address, then try to access the memory location associated with it, you could end up with this exception. The hexadecimal address 0x-1 is definitely invalid, because it's out of range. If you treat pointers as signed numbers, it points below the lowest address, 0; if you treat them as unsigned (meaning the numbers wrap around, so -1 is the same as the highest address - 0xFFFFFFFF on a 32-bit system), if it's pointing at any object larger than a byte, most of that object is past the highest address. So, this is a "hidden location," but as soon as you try to read more than one byte at that location, you will get a segfault | + | A {{w|segmentation fault}}, as referred to in the title text, is a result by accessing invalid memory addresses. If you define a pointer to an invalid address, then try to access the memory location associated with it, you could end up with this exception. The hexadecimal address 0x-1 is definitely invalid, because it's out of range. If you treat pointers as signed numbers, it points below the lowest address, 0; if you treat them as unsigned (meaning the numbers wrap around, so -1 is the same as the highest address - 0xFFFFFFFF on a 32-bit system), if it's pointing at any object larger than a byte, most of that object is past the highest address. So, this is a "hidden location," but as soon as you try to read more than one byte at that location, you will get a segfault. |
The ending letters of the pointers are spelling, reading top to bottom, the word ACE. As Cueball is playing a game, Black Hat could be additionally saying that he's an ace of the game. | The ending letters of the pointers are spelling, reading top to bottom, the word ACE. As Cueball is playing a game, Black Hat could be additionally saying that he's an ace of the game. | ||
