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collapse register mode into being a thread space, unify process/thread/debugger read/write paths, keep differences in core eval read/write paths

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This commit is contained in:
Ryan Fleury
2024-08-22 14:50:27 -07:00
parent a7cf64d5e2
commit acd7435553
12 changed files with 201 additions and 70 deletions
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src/df/core/df_core.c
+128 -14
View File
@@ -3736,6 +3736,7 @@ df_eval_space_read(void *u, E_Space space, void *out, Rng1U64 range)
DF_Entity *entity = (DF_Entity *)space;
switch(entity->kind)
{
//- rjf: default -> evaluating a debugger entity; read from entity POD evaluation
default:
{
Temp scratch = scratch_begin(0, 0);
@@ -3757,6 +3758,8 @@ df_eval_space_read(void *u, E_Space space, void *out, Rng1U64 range)
}
scratch_end(scratch);
}break;
//- rjf: process -> reading process memory
case DF_EntityKind_Process:
{
Temp scratch = scratch_begin(0, 0);
@@ -3769,6 +3772,25 @@ df_eval_space_read(void *u, E_Space space, void *out, Rng1U64 range)
}
scratch_end(scratch);
}break;
//- rjf: thread -> reading from thread register block
case DF_EntityKind_Thread:
{
Temp scratch = scratch_begin(0, 0);
CTRL_Unwind unwind = df_query_cached_unwind_from_thread(entity);
U64 frame_idx = e_interpret_ctx->reg_unwind_count;
if(frame_idx < unwind.frames.count)
{
CTRL_UnwindFrame *f = &unwind.frames.v[frame_idx];
U64 regs_size = regs_block_size_from_architecture(e_interpret_ctx->reg_arch);
Rng1U64 legal_range = r1u64(0, regs_size);
Rng1U64 read_range = intersect_1u64(legal_range, range);
U64 read_size = dim_1u64(read_range);
MemoryCopy(out, (U8 *)f->regs + read_range.min, read_size);
result = (read_size == dim_1u64(range));
}
scratch_end(scratch);
}break;
}
return result;
}
@@ -3780,13 +3802,38 @@ df_eval_space_write(void *u, E_Space space, void *in, Rng1U64 range)
DF_Entity *entity = (DF_Entity *)space;
switch(entity->kind)
{
//- rjf: default -> making commits to entity evaluation
default:
{
}break;
//- rjf: process -> commit to process memory
case DF_EntityKind_Process:
{
result = ctrl_process_write(entity->ctrl_machine_id, entity->ctrl_handle, range, in);
}break;
//- rjf: thread -> commit to thread's register block
case DF_EntityKind_Thread:
{
CTRL_Unwind unwind = df_query_cached_unwind_from_thread(entity);
U64 frame_idx = 0;
if(frame_idx < unwind.frames.count)
{
Temp scratch = scratch_begin(0, 0);
U64 regs_size = regs_block_size_from_architecture(df_architecture_from_entity(entity));
Rng1U64 legal_range = r1u64(0, regs_size);
Rng1U64 write_range = intersect_1u64(legal_range, range);
U64 write_size = dim_1u64(write_range);
CTRL_UnwindFrame *f = &unwind.frames.v[frame_idx];
void *new_regs = push_array(scratch.arena, U8, regs_size);
MemoryCopy(new_regs, f->regs, regs_size);
MemoryCopy((U8 *)new_regs + write_range.min, in, write_size);
result = ctrl_thread_write_reg_block(entity->ctrl_machine_id, entity->ctrl_handle, new_regs);
scratch_end(scratch);
}
}break;
}
return result;
}
@@ -4482,6 +4529,8 @@ df_commit_eval_value(E_Eval dst_eval, E_Eval src_eval)
}
//- rjf: commit
// TODO(rjf): @spaces
#if 0
if(result && commit_data.size != 0)
{
if(dst_eval.mode == E_Mode_Offset)
@@ -4510,11 +4559,79 @@ df_commit_eval_value(E_Eval dst_eval, E_Eval src_eval)
}
}
}
#endif
scratch_end(scratch);
return result;
}
internal B32
df_commit_eval_value_string(E_Eval dst_eval, String8 string)
{
B32 result = 0;
if(dst_eval.mode == E_Mode_Offset)
{
Temp scratch = scratch_begin(0, 0);
E_TypeKey type_key = e_type_unwrap(dst_eval.type_key);
E_TypeKind type_kind = e_type_kind_from_key(type_key);
E_TypeKey direct_type_key = e_type_unwrap(e_type_direct_from_key(e_type_unwrap(dst_eval.type_key)));
E_TypeKind direct_type_kind = e_type_kind_from_key(direct_type_key);
String8 commit_data = {0};
B32 commit_at_ptr_dest = 0;
if(E_TypeKind_FirstBasic <= type_kind && type_kind <= E_TypeKind_LastBasic)
{
E_Eval src_eval = e_eval_from_string(scratch.arena, string);
commit_data = push_str8_copy(scratch.arena, str8_struct(&src_eval.value));
commit_data.size = Min(commit_data.size, e_type_byte_size_from_key(type_key));
}
else if(type_kind == E_TypeKind_Ptr || type_kind == E_TypeKind_Array)
{
E_Eval src_eval = e_eval_from_string(scratch.arena, string);
E_Eval src_eval_value = e_value_eval_from_eval(src_eval);
E_TypeKind src_eval_value_type_kind = e_type_kind_from_key(src_eval_value.type_key);
if(type_kind == E_TypeKind_Ptr &&
(e_type_kind_is_pointer_or_ref(src_eval_value_type_kind) ||
e_type_kind_is_integer(src_eval_value_type_kind)) &&
src_eval_value.value.u64 != 0 && src_eval_value.mode == E_Mode_Value)
{
commit_data = push_str8_copy(scratch.arena, str8_struct(&src_eval.value));
commit_data.size = Min(commit_data.size, e_type_byte_size_from_key(type_key));
}
else if(direct_type_kind == E_TypeKind_Char8 ||
direct_type_kind == E_TypeKind_UChar8 ||
e_type_kind_is_integer(direct_type_kind))
{
if(string.size >= 1 && string.str[0] == '"')
{
string = str8_skip(string, 1);
}
if(string.size >= 1 && string.str[string.size-1] == '"')
{
string = str8_chop(string, 1);
}
commit_data = e_raw_from_escaped_string(scratch.arena, string);
commit_data.size += 1;
if(type_kind == E_TypeKind_Ptr)
{
commit_at_ptr_dest = 1;
}
}
}
if(commit_data.size != 0 && e_type_byte_size_from_key(type_key) != 0)
{
U64 dst_offset = dst_eval.value.u64;
if(dst_eval.mode == E_Mode_Offset && commit_at_ptr_dest)
{
E_Eval dst_value_eval = e_value_eval_from_eval(dst_eval);
dst_offset = dst_value_eval.value.u64;
}
result = e_space_write(dst_eval.space, commit_data.str, r1u64(dst_offset, dst_offset + commit_data.size));
}
scratch_end(scratch);
}
return result;
}
//- rjf: type helpers
internal E_MemberArray
@@ -8435,6 +8552,7 @@ df_core_begin_frame(Arena *arena, DF_CmdList *cmds, F32 dt)
E_ParseCtx *ctx = parse_ctx;
ctx->ip_vaddr = rip_vaddr;
ctx->ip_voff = rip_voff;
ctx->ip_thread_space = (E_Space)thread;
ctx->modules = eval_modules;
ctx->modules_count = eval_modules_count;
ctx->primary_module = eval_modules_primary;
@@ -8491,20 +8609,16 @@ df_core_begin_frame(Arena *arena, DF_CmdList *cmds, F32 dt)
E_InterpretCtx *interpret_ctx = push_array(arena, E_InterpretCtx, 1);
{
E_InterpretCtx *ctx = interpret_ctx;
ctx->space_read = df_eval_space_read;
ctx->primary_space = eval_modules_primary->space;
ctx->reg_arch = eval_modules_primary->arch;
ctx->reg_size = regs_block_size_from_architecture(eval_modules_primary->arch);
ctx->reg_data = push_array(arena, U8, ctx->reg_size);
ctx->module_base = push_array(arena, U64, 1);
ctx->module_base[0]= module->vaddr_rng.min;
ctx->tls_base = push_array(arena, U64, 1);
ctx->tls_base[0] = df_query_cached_tls_base_vaddr_from_process_root_rip(process, tls_root_vaddr, rip_vaddr);
if(unwind_count < unwind.frames.count)
{
CTRL_UnwindFrame *f = &unwind.frames.v[unwind_count];
MemoryCopy(ctx->reg_data, f->regs, ctx->reg_size);
}
ctx->space_read = df_eval_space_read;
ctx->space_write = df_eval_space_write;
ctx->primary_space = eval_modules_primary->space;
ctx->reg_arch = eval_modules_primary->arch;
ctx->reg_space = (E_Space)thread;
ctx->reg_unwind_count = unwind_count;
ctx->module_base = push_array(arena, U64, 1);
ctx->module_base[0] = module->vaddr_rng.min;
ctx->tls_base = push_array(arena, U64, 1);
ctx->tls_base[0] = df_query_cached_tls_base_vaddr_from_process_root_rip(process, tls_root_vaddr, rip_vaddr);
}
e_select_interpret_ctx(interpret_ctx);
src/df/core/df_core.h
+1
View File
@@ -1609,6 +1609,7 @@ internal B32 df_type_key_is_editable(E_TypeKey type_key);
//- rjf: writing values back to child processes
internal B32 df_commit_eval_value(E_Eval dst_eval, E_Eval src_eval);
internal B32 df_commit_eval_value_string(E_Eval dst_eval, String8 string);
//- rjf: type helpers
internal E_MemberArray df_filtered_data_members_from_members_cfg_table(Arena *arena, E_MemberArray members, DF_CfgTable *cfg);