Inspecting standard container (std::map) contents with gdb

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The existing answers to this question are very out of date. With a recent GCC and GDB it Just WorksTM thanks to the built-in Python support in GDB 7.x and the libstdc++ pretty printers that come with GCC.

For the OP’s example I get:

(gdb) print m
$1 = std::map with 2 elements = {[1] = 2, [2] = 4}

If it doesn’t work automatically for you see the first bullet point on the STL Support page of the GDB wiki.

You can write Python pretty printers for your own types too, see Pretty Printing in the GDB manual.

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