85 lines
3.1 KiB
C++
85 lines
3.1 KiB
C++
/*
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* dwarf_function.h
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*
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* Created on: Feb 1, 2020
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* Author: nnosov
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*/
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#ifndef FRAMEWORK_DWARF_FUNCTION_H_
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#define FRAMEWORK_DWARF_FUNCTION_H_
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#include "context.h"
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#include "dwarf_expression.h"
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#include "list_head.h"
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#include "dwarf_call_site.h"
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#include "dwarf_parameter.h"
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// -----------------------------------------------------------------------------------
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// pst_function
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// -----------------------------------------------------------------------------------
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typedef struct __pst_function : public SC_ListNode {
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__pst_function(pst_context* _ctx, __pst_function* _parent) : ctx(_ctx) {
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pc = 0;
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line = -1;
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die = NULL;
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lowpc = 0;
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highpc = 0;
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memcpy(&cursor, _ctx->curr_frame, sizeof(cursor));
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parent = _parent;
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sp = 0;
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cfa = 0;
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frame = NULL;
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}
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~__pst_function() {
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clear();
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if(frame) {
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free(frame);
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}
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}
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void clear();
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pst_parameter* add_param();
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void del_param(pst_parameter* p);
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pst_parameter* next_param(pst_parameter* p);
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pst_call_site* add_call_site(uint64_t target, const char* origin);
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void del_call_site(pst_call_site* st);
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pst_call_site* next_call_site(pst_call_site* st);
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pst_call_site* call_site_by_origin(const char* origin);
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pst_call_site* call_site_by_target(uint64_t target);
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bool unwind(Dwarf_Addr addr);
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bool handle_dwarf(Dwarf_Die* d);
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bool print_dwarf();
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bool handle_lexical_block(Dwarf_Die* result);
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bool handle_call_site(Dwarf_Die* result);
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pst_call_site* find_call_site(__pst_function* callee);
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bool get_frame();
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Dwarf_Addr lowpc; // offset to start of the function against base address
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Dwarf_Addr highpc; // offset to the next address after the end of the function against base address
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Dwarf_Die* die; // DWARF DIE containing definition of the function
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std::string name; // function's name
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SC_ListHead params; // function's parameters
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// call-site
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SC_ListHead call_sites; // Call-Site definitions
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SC_Dict mCallStToTarget; // map pointer to caller to call-site
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SC_Dict mCallStToOrigin; // map caller name to call-site
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unw_word_t pc; // address between lowpc & highpc (plus base address offset). actually, currently executed command
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unw_word_t sp; // SP register in function's frame
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unw_word_t cfa; // CFA (Canonical Frame Adress) of the function
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unw_cursor_t cursor; // copy of stack state of the function
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int line; // line in code where function is defined
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std::string file; // file name (DWARF Compilation Unit) where function is defined
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__pst_function* parent; // parent function in call trace (caller)
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Dwarf_Frame* frame; // function's stack frame
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pst_context* ctx; // context of unwinding
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} pst_function;
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#endif /* FRAMEWORK_DWARF_FUNCTION_H_ */
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