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emit jump thunks for imports only when needed

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This commit is contained in:
Nikita Smith
2025-09-02 22:20:34 -07:00
committed by Ryan Fleury
parent 43e81b934b
commit 580303b0dd
4 changed files with 110 additions and 90 deletions
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src/linker/lnk_obj.c
+21 -12
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@@ -15,7 +15,9 @@ internal void
lnk_error_input_obj(LNK_ErrorCode code, LNK_Input *input, char *fmt, ...)
{
va_list args; va_start(args, fmt);
lnk_error_with_loc_fv(code, input->path, input->trigger->lib ? input->trigger->lib->path : str8_zero(), fmt, args);
LNK_LibMemberRef *link_member = input->link_member;
LNK_Lib *link_lib = link_member ? link_member->lib : 0;
lnk_error_with_loc_fv(code, input->path, link_lib ? link_lib->path : str8_zero(), fmt, args);
va_end(args);
}
@@ -37,7 +39,7 @@ THREAD_POOL_TASK_FUNC(lnk_obj_initer)
LNK_Input *input = task->inputs[task_id];
LNK_Obj *obj = &task->objs[task_id].data;
ProfBeginV("Init Obj [%S%s%S]", input->lib_path, (input->lib_path.size ? ": " : 0), input->path);
//ProfBeginV("Init Obj [%S%s%S]", input->lib_path, (input->lib_path.size ? ": " : 0), input->path);
//
// parse obj header
@@ -244,19 +246,20 @@ THREAD_POOL_TASK_FUNC(lnk_obj_initer)
}
}
//
// extract obj features from compile symbol in .debug$S
//
B8 hotpatch = 0;
if (header.machine == COFF_MachineType_X64) {
hotpatch = 1;
} else {
}
//
// extract obj features from compile symbol in .debug$S
//
else {
Temp scratch = scratch_begin(&arena, 1);
CV_Symbol comp_symbol = {0};
for (U64 sect_idx = 0; sect_idx < obj->header.section_count_no_null; sect_idx += 1) {
for (U64 sect_idx = 0; sect_idx < header.section_count_no_null; sect_idx += 1) {
COFF_SectionHeader *sect_header = &coff_section_table[sect_idx];
String8 name = str8_cstring_capped_reverse(sect_header->name, sect_header->name+sizeof(sect_header->name));
String8 name = str8_cstring_capped(sect_header->name, sect_header->name+sizeof(sect_header->name));
if (str8_match(name, str8_lit(".debug$S"), 0)) {
Temp temp = temp_begin(scratch.arena);
String8 debug_s_data = str8_substr(input->data, rng_1u64(sect_header->foff, sect_header->foff+sect_header->fsize));
@@ -288,14 +291,13 @@ THREAD_POOL_TASK_FUNC(lnk_obj_initer)
// fill out obj
obj->data = input->data;
obj->path = push_str8_copy(arena, input->path);
obj->lib = input->trigger ? input->trigger->lib : 0;
obj->header = header;
obj->comdats = comdats;
obj->exclude_from_debug_info = input->exclude_from_debug_info;
obj->hotpatch = hotpatch;
obj->associated_sections = associated_sections;
obj->node = &task->objs[task_id];
obj->trigger_symbol = input->trigger;
obj->link_member = input->link_member;
ProfEnd();
}
@@ -454,12 +456,19 @@ lnk_obj_get_vol_md(LNK_Obj *obj)
return lnk_obj_match_symbol(obj, str8_lit("@vol.md")).value;
}
internal LNK_Lib *
lnk_obj_get_lib(LNK_Obj *obj)
{
return obj->link_member ? obj->link_member->lib : 0;
}
internal String8
lnk_obj_get_lib_path(LNK_Obj *obj)
{
String8 lib_path = {0};
if (obj && obj->lib) {
lib_path = obj->lib->path;
if (obj) {
LNK_Lib *lib = lnk_obj_get_lib(obj);
lib_path = lib ? lib->path : str8_zero();
}
return lib_path;
}