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eliminate unnecessary info in debug engine entity abstraction / demon events; adjust symbol server / debug info loading such that the debug info loader is the one who decides to kick off downloads based on presence in cache path; use cache path as key, unpack info for download requests

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This commit is contained in:
Ryan Fleury
2026-06-08 21:06:44 -07:00
parent b22f9f2d8b
commit 132751777f
19 changed files with 199 additions and 318 deletions
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src/dbg_engine/dbg_engine_user.c
-125
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@@ -1326,80 +1326,6 @@ d_lines_from_file_path_line_num(Arena *arena, String8 file_path, S64 line_num, U
return list;
}
////////////////////////////////
//~ rjf: Process/Thread/Module Info Lookups
internal U64
d_tls_base_vaddr_from_process_root_rip(D_Entity *process, U64 root_vaddr, U64 rip_vaddr)
{
ProfBeginFunction();
U64 base_vaddr = 0;
if(!d_ctrl_targets_running())
{
Temp scratch = scratch_begin(0, 0);
//- rjf: unpack module info
D_Entity *module = d_module_from_process_vaddr(process, rip_vaddr);
U64 addr_size = byte_size_from_arch(process->arch);
switch(process->tls_model)
{
case D_TlsModel_Null: {}break;
case D_TlsModel_WinodwsNt:
{
// read thread local base pointer out of TEB
U64 thread_local_base = root_vaddr;
U64 tls_addr_array = 0;
D_ProcessMemorySlice tls_addr_array_slice = d_process_memory_slice_from_vaddr_range(scratch.arena, process->handle, r1u64(thread_local_base, thread_local_base + addr_size), 0, 0);
String8 tls_array_vaddr_data = tls_addr_array_slice.data;
if(tls_array_vaddr_data.size == addr_size)
{
U64 tls_array_vaddr = 0;
MemoryCopyStr8(&tls_array_vaddr, tls_array_vaddr_data);
// read thread local storage pointer (array of TLS pointers, one per module)
U64 tls_ptr_vaddr = tls_array_vaddr + module->tls_index * addr_size;
D_ProcessMemorySlice result_slice = d_process_memory_slice_from_vaddr_range(scratch.arena, process->handle, r1u64(tls_ptr_vaddr, tls_ptr_vaddr + addr_size), 0, 0);
String8 result_data = result_slice.data;
if(result_data.size == addr_size)
{
MemoryCopyStr8(&base_vaddr, result_data);
}
}
}break;
case D_TlsModel_Gnu:
{
if(module->tls_index > 0) // zero is reserved for the generation counter
{
// read dynamic thread vector pointer (one per dynamic module)
U64 dtv_base = root_vaddr;
U64 dtv_size = addr_size * 2; // union dtv { size_t counter; struct dtv_pointer { void *val, *to_free; }; };
U64 dtv_pointer_vaddr = dtv_base + module->tls_index * dtv_size;
D_ProcessMemorySlice dtv_pointer_slice = d_process_memory_slice_from_vaddr_range(scratch.arena, process->handle, r1u64(dtv_pointer_vaddr, dtv_pointer_vaddr + dtv_size), 0, 0);
String8 dtv_pointer_data = dtv_pointer_slice.data;
if(dtv_pointer_data.size == dtv_size)
{
U64 dtv_pointer = 0;
MemoryCopyStr8(&dtv_pointer, dtv_pointer_data);
// verify that TLS block was allocated
U64 tls_dtv_unallocated = addr_size == 4 ? max_U32 : max_U64;
if(dtv_pointer != tls_dtv_unallocated)
{
base_vaddr = dtv_pointer + module->tls_offset; // add tls_offset because DT_NEEDED modules share TLS block with the main exe
}
}
}
}break;
default: {InvalidPath;}break;
}
scratch_end(scratch);
}
ProfEnd();
return base_vaddr;
}
////////////////////////////////
//~ rjf: Target Controls
@@ -1509,57 +1435,6 @@ d_query_cached_cfa_from_thread_unwind(D_Entity *thread, U64 unwind_count)
return cfa;
}
internal U64
d_query_cached_tls_base_vaddr_from_process_root_rip(D_Entity *process, U64 root_vaddr, U64 rip_vaddr)
{
U64 result = 0;
for(U64 cache_idx = 0; cache_idx < ArrayCount(d_user_state->tls_base_caches); cache_idx += 1)
{
D_RunTLSBaseCache *cache = &d_user_state->tls_base_caches[(d_user_state->tls_base_cache_gen+cache_idx)%ArrayCount(d_user_state->tls_base_caches)];
if(cache_idx == 0 && cache->slots_count == 0)
{
cache->slots_count = 256;
cache->slots = push_array(cache->arena, D_RunTLSBaseCacheSlot, cache->slots_count);
}
else if(cache->slots_count == 0)
{
break;
}
D_Handle handle = process->handle;
U64 hash = d_hash_from_seed_string(d_hash_from_string(str8_struct(&handle)), str8_struct(&rip_vaddr));
U64 slot_idx = hash%cache->slots_count;
D_RunTLSBaseCacheSlot *slot = &cache->slots[slot_idx];
D_RunTLSBaseCacheNode *node = 0;
for(D_RunTLSBaseCacheNode *n = slot->first; n != 0; n = n->hash_next)
{
if(d_handle_match(n->process, handle) && n->root_vaddr == root_vaddr && n->rip_vaddr == rip_vaddr)
{
node = n;
break;
}
}
if(node == 0)
{
U64 tls_base_vaddr = d_tls_base_vaddr_from_process_root_rip(process, root_vaddr, rip_vaddr);
if(tls_base_vaddr != 0)
{
node = push_array(cache->arena, D_RunTLSBaseCacheNode, 1);
SLLQueuePush_N(slot->first, slot->last, node, hash_next);
node->process = handle;
node->root_vaddr = root_vaddr;
node->rip_vaddr = rip_vaddr;
node->tls_base_vaddr = tls_base_vaddr;
}
}
if(node != 0 && node->tls_base_vaddr != 0)
{
result = node->tls_base_vaddr;
break;
}
}
return result;
}
internal E_String2NumMap *
d_query_cached_locals_map_from_dbgi_key_voff(DI_Key dbgi_key, U64 voff)
{