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// function_parameter stores information about a single parameter to a function.
typedef struct function_parameter {
// Type of the parameter as defined by the reflect.Kind enum.
unsigned int kind;
// Size of the variable in bytes.
unsigned int size;
// Offset from stack pointer. This should only be set from the Go side.
int offset;
// If true, the parameter is passed in a register.
bool in_reg;
// The number of register pieces the parameter is passed in.
int n_pieces;
// If in_reg is true, this represents the registers that the parameter is passed in.
// This is an array because the number of registers may vary and the parameter may be
// passed in multiple registers.
int reg_nums[6];
// The following are filled in by the eBPF program.
size_t daddr; // Data address.
char val[0x30]; // Value of the parameter.
char deref_val[0x30]; // Dereference value of the parameter.
} function_parameter_t;
// function_parameter_list holds info about the function parameters and
// stores information on up to 6 parameters.
typedef struct function_parameter_list {
unsigned int goid_offset; // Offset of the `goid` struct member.
long long g_addr_offset; // Offset of the Goroutine struct from the TLS segment.
int goroutine_id;
unsigned long long int fn_addr;
bool is_ret;
unsigned int n_parameters; // number of parameters.
function_parameter_t params[6]; // list of parameters.
unsigned int n_ret_parameters; // number of return parameters.
function_parameter_t ret_params[6]; // list of return parameters.
} function_parameter_list_t;
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