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when building locals map given a raddbg*voff, capture locals from previously-exited scopes

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This commit is contained in:
Ryan Fleury
2024-01-24 13:00:17 -08:00
parent 8789e763fd
commit 26b8603a59
2 changed files with 68 additions and 24 deletions
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src/eval/eval_parser.c
+57 -12
View File
@@ -132,34 +132,79 @@ eval_num_from_string(EVAL_String2NumMap *map, String8 string)
internal EVAL_String2NumMap *
eval_push_locals_map_from_raddbg_voff(Arena *arena, RADDBG_Parsed *rdbg, U64 voff)
{
Temp scratch = scratch_begin(&arena, 1);
//- rjf: gather scopes to walk
typedef struct Task Task;
struct Task
{
Task *next;
RADDBG_Scope *scope;
};
Task *first_task = 0;
Task *last_task = 0;
//- rjf: voff -> tightest scope
RADDBG_Scope *tightest_scope = 0;
if(rdbg->scope_vmap != 0 && rdbg->scopes != 0)
{
U64 scope_idx = raddbg_vmap_idx_from_voff(rdbg->scope_vmap, rdbg->scope_vmap_count, voff);
tightest_scope = &rdbg->scopes[scope_idx];
RADDBG_Scope *scope = &rdbg->scopes[scope_idx];
Task *task = push_array(scratch.arena, Task, 1);
task->scope = scope;
SLLQueuePush(first_task, last_task, task);
tightest_scope = scope;
}
//- rjf: voff-1 -> scope
if(voff > 0 && rdbg->scope_vmap != 0 && rdbg->scopes != 0)
{
U64 scope_idx = raddbg_vmap_idx_from_voff(rdbg->scope_vmap, rdbg->scope_vmap_count, voff-1);
RADDBG_Scope *scope = &rdbg->scopes[scope_idx];
if(scope != tightest_scope)
{
Task *task = push_array(scratch.arena, Task, 1);
task->scope = scope;
SLLQueuePush(first_task, last_task, task);
}
}
//- rjf: tightest scope -> walk up the tree & build tasks for each parent scope
if(tightest_scope != 0)
{
for(RADDBG_Scope *scope = &rdbg->scopes[tightest_scope->parent_scope_idx];
scope != 0 && scope != &rdbg->scopes[0];
scope = &rdbg->scopes[scope->parent_scope_idx])
{
Task *task = push_array(scratch.arena, Task, 1);
task->scope = scope;
SLLQueuePush(first_task, last_task, task);
}
}
//- rjf: build blank map
EVAL_String2NumMap *map = push_array(arena, EVAL_String2NumMap, 1);
*map = eval_string2num_map_make(arena, 1024);
//- rjf: tightest scope -> walk up the tree & accumulate all locals
for(RADDBG_Scope *scope = tightest_scope;
scope != 0 && scope != &rdbg->scopes[0];
scope = &rdbg->scopes[scope->parent_scope_idx])
//- rjf: accumulate locals for all tasks
for(Task *task = first_task; task != 0; task = task->next)
{
U32 local_opl_idx = scope->local_first + scope->local_count;
for(U32 local_idx = scope->local_first; local_idx < local_opl_idx; local_idx += 1)
RADDBG_Scope *scope = task->scope;
if(scope != 0)
{
RADDBG_Local *local_var = &rdbg->locals[local_idx];
U64 local_name_size = 0;
U8 *local_name_str = raddbg_string_from_idx(rdbg, local_var->name_string_idx, &local_name_size);
String8 name = push_str8_copy(arena, str8(local_name_str, local_name_size));
eval_string2num_map_insert(arena, map, name, (U64)local_idx+1);
U32 local_opl_idx = scope->local_first + scope->local_count;
for(U32 local_idx = scope->local_first; local_idx < local_opl_idx; local_idx += 1)
{
RADDBG_Local *local_var = &rdbg->locals[local_idx];
U64 local_name_size = 0;
U8 *local_name_str = raddbg_string_from_idx(rdbg, local_var->name_string_idx, &local_name_size);
String8 name = push_str8_copy(arena, str8(local_name_str, local_name_size));
eval_string2num_map_insert(arena, map, name, (U64)local_idx+1);
}
}
}
scratch_end(scratch);
return map;
}
src/scratch/ryan_scratch.c
+11 -12
View File
@@ -1,18 +1,17 @@
// Copyright (c) 2024 Epic Games Tools
// Licensed under the MIT license (https://opensource.org/license/mit/)
#include <stdio.h>
#include <stdint.h>
#include <windows.h>
int Foo(int x, int y)
{
return x + y;
}
int main(void) {
printf("1\n");
VOID *code = VirtualAlloc(0, 0x1000, MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE);
*((uint32_t*)code) = 0xCCCCCCCC;
((void (__fastcall *)()) code)();
printf("2\n");
int main(void)
{
{
int x = 23;
int y = 45;
Foo(x, y);
}
return 0;
}