1b2f7f0051
This patch enables the eBPF tracer backend to parse the ID of the Goroutine which hit the uprobe. This implementation is specific to AMD64 and will have to be generalized further in order to be used on other architectures.
39 lines
1.6 KiB
C
39 lines
1.6 KiB
C
#include <stdbool.h>
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// function_parameter stores information about a single parameter to a function.
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typedef struct function_parameter {
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// Type of the parameter as defined by the reflect.Kind enum.
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unsigned int kind;
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// Size of the variable in bytes.
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unsigned int size;
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// Offset from stack pointer. This should only be set from the Go side.
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unsigned int offset;
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// If true, the parameter is passed in a register.
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bool in_reg;
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// The number of register pieces the parameter is passed in.
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int n_pieces;
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// If in_reg is true, this represents the registers that the parameter is passed in.
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// This is an array because the number of registers may vary and the parameter may be
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// passed in multiple registers.
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int reg_nums[6];
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// The following are filled in by the eBPF program.
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unsigned int daddr; // Data address.
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char val[0x30]; // Value of the parameter.
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char deref_val[0x30]; // Dereference value of the parameter.
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} function_parameter_t;
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// function_parameter_list holds info about the function parameters and
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// stores information on up to 6 parameters.
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typedef struct function_parameter_list {
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unsigned int goid_offset; // Offset of the `goid` struct member.
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long long g_addr_offset; // Offset of the Goroutine struct from the TLS segment.
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int goroutine_id;
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unsigned int fn_addr;
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unsigned int n_parameters; // number of parameters.
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function_parameter_t params[6]; // list of parameters.
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} function_parameter_list_t;
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