/** * struct annotated_member - Type of member field * @node: List entry in the parent list * @children: List head for child nodes * @type_name: Name of the member type * @var_name: Name of the member variable * @offset: Offset from the outer data type * @size: Size of the member field * * This represents a member type in a data type.
*/ struct annotated_member { struct list_head node; struct list_head children; char *type_name; char *var_name; int offset; int size;
};
/** * struct type_hist_entry - Histogram entry per offset * @nr_samples: Number of samples * @period: Count of event
*/ struct type_hist_entry { int nr_samples;
u64 period;
};
/** * struct type_hist - Type histogram for each event * @nr_samples: Total number of samples in this data type * @period: Total count of the event in this data type * @offset: Array of histogram entry
*/ struct type_hist {
u64 nr_samples;
u64 period; struct type_hist_entry addr[];
};
/** * struct annotated_data_type - Data type to profile * @node: RB-tree node for dso->type_tree * @self: Actual type information * @nr_histogram: Number of histogram entries * @histograms: An array of pointers to histograms * * This represents a data type accessed by samples in the profile data.
*/ struct annotated_data_type { struct rb_node node; struct annotated_member self; int nr_histograms; struct type_hist **histograms;
};
/** * struct data_loc_info - Data location information * @arch: CPU architecture info * @thread: Thread info * @ms: Map and Symbol info * @ip: Instruction address * @var_addr: Data address (for global variables) * @cpumode: CPU execution mode * @op: Instruction operand location (regs and offset) * @di: Debug info * @fbreg: Frame base register * @fb_cfa: Whether the frame needs to check CFA * @type_offset: Final offset in the type
*/ struct data_loc_info { /* These are input field, should be filled by caller */ struct arch *arch; struct thread *thread; struct map_symbol *ms;
u64 ip;
u64 var_addr;
u8 cpumode; struct annotated_op_loc *op; struct debuginfo *di;
/* These are used internally */ int fbreg; bool fb_cfa;
/* This is for the result */ int type_offset;
};
/** * struct annotated_data_stat - Debug statistics * @total: Total number of entry * @no_sym: No symbol or map found * @no_insn: Failed to get disasm line * @no_insn_ops: The instruction has no operands * @no_mem_ops: The instruction has no memory operands * @no_reg: Failed to extract a register from the operand * @no_dbginfo: The binary has no debug information * @no_cuinfo: Failed to find a compile_unit * @no_var: Failed to find a matching variable * @no_typeinfo: Failed to get a type info for the variable * @invalid_size: Failed to get a size info of the type * @bad_offset: The access offset is out of the type
*/ struct annotated_data_stat { int total; int no_sym; int no_insn; int no_insn_ops; int no_mem_ops; int no_reg; int no_dbginfo; int no_cuinfo; int no_var; int no_typeinfo; int invalid_size; int bad_offset; int insn_track;
}; externstruct annotated_data_stat ann_data_stat;
#ifdef HAVE_LIBDW_SUPPORT /* * Type information in a register, valid when @ok is true. * The @caller_saved registers are invalidated after a function call.
*/ struct type_state_reg {
Dwarf_Die type;
u32 imm_value; bool ok; bool caller_saved;
u8 kind;
u8 copied_from;
};
/* Type information in a stack location, dynamically allocated */ struct type_state_stack { struct list_head list;
Dwarf_Die type; int offset; int size; bool compound;
u8 kind;
};
/* FIXME: This should be arch-dependent */ #ifdef __powerpc__ #define TYPE_STATE_MAX_REGS 32 #else #define TYPE_STATE_MAX_REGS 16 #endif
/* * State table to maintain type info in each register and stack location. * It'll be updated when new variable is allocated or type info is moved * to a new location (register or stack). As it'd be used with the * shortest path of basic blocks, it only maintains a single table.
*/ struct type_state { /* state of general purpose registers */ struct type_state_reg regs[TYPE_STATE_MAX_REGS]; /* state of stack location */ struct list_head stack_vars; /* return value register */ int ret_reg; /* stack pointer register */ int stack_reg;
};
/* Returns data type at the location (ip, reg, offset) */ struct annotated_data_type *find_data_type(struct data_loc_info *dloc);
/* Update type access histogram at the given offset */ int annotated_data_type__update_samples(struct annotated_data_type *adt, struct evsel *evsel, int offset, int nr_samples, u64 period);
/* Release all data type information in the tree */ void annotated_data_type__tree_delete(struct rb_root *root);
/* Release all global variable information in the tree */ void global_var_type__tree_delete(struct rb_root *root);
/* Print data type annotation (including members) on stdout */ int hist_entry__annotate_data_tty(struct hist_entry *he, struct evsel *evsel);
/* Get name of member field at the given offset in the data type */ int annotated_data_type__get_member_name(struct annotated_data_type *adt, char *buf, size_t sz, int member_offset);
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