How to debug C++ memory errors?

Question

Does valgrind work with STL allocator? I am using STL vector with plain C library in the follwing fashion:

double some_C_functions(int, double*);

std::vector<double> v;
.....
double result = some_C_functions(v.size(), &v[0]);

What if the C functions tries to overshoot the pointer? Can valgrind detect the error?

Please tell us what `some_C_functions1 does

Ed Heal
– Ed Heal

2011-09-09 14:46:42 +00:00
Commented Sep 9, 2011 at 14:46 — Ed Heal
– Ed Heal, Commented Sep 9, 2011 at 14:46
Read or writing on the overshoot though.... :)

Mark B
– Mark B

2011-09-09 15:08:32 +00:00
Commented Sep 9, 2011 at 15:08 — Mark B
– Mark B, Commented Sep 9, 2011 at 15:08

Mark B · Accepted Answer · 2011-09-09 14:47:09Z

2

Valgrind should still be able to detect that since it's hooking into the memory management which still goes to the same heap for C or C++. Obviously it's hard(er) to detect errant reads though.

answered Sep 9, 2011 at 14:47

Mark B

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