我正在尝试使用支持 python 的 gdbMinGW 构建 http://sourceforge.net/projects/mingwbuilds/。我遇到了一个错误。这是一段相当简单的代码,在 MSVC 下调试时效果很好。
D:\CppProject\c1\bin\Debug>gdb c1.exe
GNU gdb (GDB) 7.6
(copyright, license, bug report, etc omitted here)
Reading symbols from D:\CppProject\c1\bin\Debug\c1.exe...done.
(gdb) l
1 #include <iostream>
2 #include <vector>
3
4 using namespace std;
5
6 int main()
7 {
8 vector<string> v;
9 v.push_back("first");
10 v.push_back("second");
(gdb)
11 cout<<v[0]<<endl;
12 cout<<v[1]<<endl;
13
14 return 0;
15 }
(gdb) break 11
Breakpoint 1 at 0x4016c9: file D:\CppProject\c1\main.cpp, line 11.
(gdb) run
Starting program: D:\CppProject\c1\bin\Debug\c1.exe
[New Thread 1256.0xbe8]
Breakpoint 1, main () at D:\CppProject\c1\main.cpp:11
11 cout<<v[0]<<endl;
(gdb) p v
$1 = std::vector of length 2, capacity 2 = {"first", "second"}
(gdb) p v[0]
$2 = <error reading variable: Cannot access memory at address 0x29a2ca50>
这听起来可能很简单——你用 -O0 编译了吗?我怀疑编译器优化可能会给您带来麻烦。
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