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float run/mem/reg generations out of demon, into core; fix issue of demon access synchronization w/ mem gens, causing failure-to-update-stale-parts-of-process-memory-cache

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This commit is contained in:
Ryan Fleury
2025-06-28 10:02:51 -07:00
parent e34e8adbaa
commit 709bc2cfab
8 changed files with 87 additions and 73 deletions
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src/demon/demon_core.h
-5
View File
@@ -221,11 +221,6 @@ internal void dmn_halt(U64 code, U64 user_data);
////////////////////////////////
//~ rjf: @dmn_os_hooks Introspection Functions (Implemented Per-OS)
//- rjf: run/memory/register counters
internal U64 dmn_run_gen(void);
internal U64 dmn_mem_gen(void);
internal U64 dmn_reg_gen(void);
//- rjf: non-blocking-control-thread access barriers
internal B32 dmn_access_open(void);
internal void dmn_access_close(void);
src/demon/linux/demon_core_linux.c
-20
View File
@@ -71,26 +71,6 @@ dmn_halt(U64 code, U64 user_data)
////////////////////////////////
//~ rjf: @dmn_os_hooks Introspection Functions (Implemented Per-OS)
//- rjf: run/memory/register counters
internal U64
dmn_run_gen(void)
{
return 0;
}
internal U64
dmn_mem_gen(void)
{
return 0;
}
internal U64
dmn_reg_gen(void)
{
return 0;
}
//- rjf: non-blocking-control-thread access barriers
internal B32
src/demon/win32/demon_core_win32.c
+3 -31
View File
@@ -320,7 +320,10 @@ dmn_w32_process_read(HANDLE process, Rng1U64 range, void *dst)
SIZE_T actual_read = 0;
if(!ReadProcessMemory(process, (LPCVOID)cursor, ptr, to_read, &actual_read))
{
DWORD error = GetLastError();
log_infof("'Win32 ReadProcessMemory failure': { [0x%I64x, 0x%I64x), code: %i }\n", range.min, range.max, error);
bytes_read += actual_read;
(void)error;
break;
}
ptr += actual_read;
@@ -349,7 +352,6 @@ dmn_w32_process_write(HANDLE process, Rng1U64 range, void *src)
ptr += actual_write;
cursor += actual_write;
}
ins_atomic_u64_inc_eval(&dmn_w32_shared->mem_gen);
return result;
}
@@ -1112,7 +1114,6 @@ dmn_w32_thread_write_reg_block(Arch arch, HANDLE thread, void *reg_block)
scratch_end(scratch);
}break;
}
ins_atomic_u64_inc_eval(&dmn_w32_shared->reg_gen);
ProfEnd();
return result;
}
@@ -1541,7 +1542,6 @@ dmn_ctrl_run(Arena *arena, DMN_CtrlCtx *ctx, DMN_RunCtrls *ctrls)
U64 new_rflags = rflags | 0x100;
single_step_thread_ctx->EFlags = new_rflags;
SetThreadContext(thread->handle, single_step_thread_ctx);
ins_atomic_u64_inc_eval(&dmn_w32_shared->reg_gen);
}
}break;
}
@@ -1891,9 +1891,6 @@ dmn_ctrl_run(Arena *arena, DMN_CtrlCtx *ctx, DMN_RunCtrls *ctrls)
(void)err;
keep_going = 1;
}
ins_atomic_u64_inc_eval(&dmn_w32_shared->run_gen);
ins_atomic_u64_inc_eval(&dmn_w32_shared->mem_gen);
ins_atomic_u64_inc_eval(&dmn_w32_shared->reg_gen);
}
}
@@ -2327,7 +2324,6 @@ dmn_ctrl_run(Arena *arena, DMN_CtrlCtx *ctx, DMN_RunCtrls *ctrls)
U64 new_rip = instruction_pointer;
ctx->Rip = new_rip;
SetThreadContext(thread->handle, ctx);
ins_atomic_u64_inc_eval(&dmn_w32_shared->reg_gen);
}
}break;
}
@@ -2841,7 +2837,6 @@ dmn_ctrl_run(Arena *arena, DMN_CtrlCtx *ctx, DMN_RunCtrls *ctrls)
U64 new_rflags = rflags & ~0x100;
single_step_thread_ctx->EFlags = new_rflags;
SetThreadContext(thread->handle, single_step_thread_ctx);
ins_atomic_u64_inc_eval(&dmn_w32_shared->reg_gen);
}
}break;
}
@@ -2938,29 +2933,6 @@ dmn_halt(U64 code, U64 user_data)
////////////////////////////////
//~ rjf: @dmn_os_hooks Introspection Functions (Implemented Per-OS)
//- rjf: run/memory/register counters
internal U64
dmn_run_gen(void)
{
U64 result = ins_atomic_u64_eval(&dmn_w32_shared->run_gen);
return result;
}
internal U64
dmn_mem_gen(void)
{
U64 result = ins_atomic_u64_eval(&dmn_w32_shared->mem_gen);
return result;
}
internal U64
dmn_reg_gen(void)
{
U64 result = ins_atomic_u64_eval(&dmn_w32_shared->reg_gen);
return result;
}
//- rjf: non-blocking-control-thread access barriers
internal B32
src/demon/win32/demon_core_win32.h
-5
View File
@@ -200,11 +200,6 @@ struct DMN_W32_Shared
OS_Handle access_mutex;
B32 access_run_state;
// rjf: run/mem/reg gens
U64 run_gen;
U64 mem_gen;
U64 reg_gen;
// rjf: detaching info
Arena *detach_arena;
DMN_HandleList detach_processes;