Bug in visualizing enum value in bit-field defined struct

[Otatiaro]

Hello,

I have an enum value embedded in a bit-field defined structure:

enum fix_type_t : uint8_t
{
no_fix = 0,
kf_solution_1_sv = 0b001,
kf_solution_2_sv = 0b010,
kf_solution_3_sv = 0b011,
kf_solution_4_or_mode_sv = 0b100,
least_squares_solution_2_d = 0b101,
least_squares_solution_3_d = 0b110,
dr_solution = 0b111,
};

struct __attribute__((packed))
{
fix_type_t fix_type : 3;
bool tricke_power : 1;
altitude_hold_t altitude_hold : 2;
bool dop_limits_exceeded : 1;
bool dgps_correction_applied : 1;
bool sensor_dr : 1;
bool navigation_overdetermined : 1;
bool velocity_dr_timeout : 1;
bool reserved : 1;
bool invalid_velocity : 1;
bool altitude_hold_diabled : 1;
dr_error_t dr_error : 2;
};

Compilation is ok (I get a warning about type being too small to contain all values, but that’s fine), I can check the result is ok (I know the expected value, so I placed an “if(value == expected_value) then __nop()” and the nop is getting called. So function wise all is perfect.

But when debugging, if I try to check the enum value at runtime with the debugger, I get a value “-4” instead of kf_solution_4_or_mode_sv. This seems to be a visualization bug.

Thomas.

[support]

Hi,

This looks like a gdb bug actually. Can you confirm that you also get the wrong value when running “print <expression>” manually via the GDB Session window?

[Author]

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