Question

valgrind --leak-check=full ./CH02_HelloTriangle 
==11404== Memcheck, a memory error detector
==11404== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al.
==11404== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info
==11404== Command: ./CH02_HelloTriangle
==11404== 
==11404== Jump to the invalid address stated on the next line
==11404==    at 0x0: ???
==11404==    by 0x6F9271A: ??? (in /usr/lib/fglrx/dri/fglrx_dri.so)
==11404==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==11404== 
==11404== 
==11404== Process terminating with default action of signal 11 (SIGSEGV)
==11404==  Bad permissions for mapped region at address 0x0
==11404==    at 0x0: ???
==11404==    by 0x6F9271A: ??? (in /usr/lib/fglrx/dri/fglrx_dri.so)
==11404== 
==11404== HEAP SUMMARY:
==11404==     in use at exit: 144,423 bytes in 407 blocks
==11404==   total heap usage: 1,009 allocs, 602 frees, 189,993 bytes allocated
==11404== 
==11404== LEAK SUMMARY:
==11404==    definitely lost: 0 bytes in 0 blocks
==11404==    indirectly lost: 0 bytes in 0 blocks
==11404==      possibly lost: 0 bytes in 0 blocks
==11404==    still reachable: 144,423 bytes in 407 blocks
==11404==         suppressed: 0 bytes in 0 blocks
==11404== Reachable blocks (those to which a pointer was found) are not shown.
==11404== To see them, rerun with: --leak-check=full --show-reachable=yes
==11404== 
==11404== For counts of detected and suppressed errors, rerun with: -v
==11404== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 2 from 2)
Segmentation fault (core dumped)

究竟是什么问题？

如果我运行此应用程序，它只是退出并出现分段错误错误，它是一个使用AMD GLES SDK for desktop编译的OpenGL ES 2.0应用程序。

This the source适用于此应用程序。

Answer 1

/usr/lib/fglrx/dri/fglrx_dri.so中的代码跳过空函数指针。

当然真正的问题是为什么，但由于这是专有的封闭源代码，你没有简单的方法可以找到答案。如果你正在调用该代码中的任何函数指针作为回调函数，那么确保你没有将空指针传递给它们将是一个好的开始。

基本上虽然这不是valgrind可能帮助你找到我害怕的问题，但它肯定与内存泄漏无关。

valgrind的意思是“跳转到无效地址”这里？

1 个答案: