1 #include "mc_private.h"
3 /** Resolve snapshot in the process address space
5 * @param object Process address of the struct/class
6 * @param type Type of the struct/class
7 * @param member Member description
8 * @param snapshot Snapshot (or NULL)
9 * @return Process address of the given member of the 'object' struct/class
11 void* mc_member_resolve(const void* base, dw_type_t type, dw_type_t member, mc_snapshot_t snapshot) {
12 if(!member->location.size) {
13 return ((char*) base) + member->offset;
16 s_mc_expression_state_t state;
17 memset(&state, 0, sizeof(s_mc_expression_state_t));
18 state.frame_base = NULL;
20 state.snapshot = snapshot;
22 state.stack[0] = (uintptr_t) base;
24 if(mc_dwarf_execute_expression(member->location.size, member->location.ops, &state))
25 xbt_die("Error evaluating DWARF expression");
26 if(state.stack_size==0)
27 xbt_die("No value on the stack");
29 return (void*) state.stack[state.stack_size-1];
32 /** Resolve snapshot in the snapshot address space
34 * @param object Snapshot address of the struct/class
35 * @param type Type of the struct/class
36 * @param member Member description
37 * @param snapshot Snapshot (or NULL)
38 * @return Snapshot address of the given member of the 'object' struct/class
40 void* mc_member_snapshot_resolve(const void* object, dw_type_t type, dw_type_t member, mc_snapshot_t snapshot) {
41 if(!member->location.size) {
42 return (char*) object + member->offset;
44 // Translate the problem in the process address space:
45 void* real_area = (void*) mc_untranslate_address((void *)object, snapshot);
46 // Resolve the member in the process address space:
47 void* real_member = mc_member_resolve(real_area, type, member, snapshot);
48 // Translate back in the snapshot address space:
49 return mc_translate_address((uintptr_t)real_member, snapshot);