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add guarded TLS test for Windows fixed TLS

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daanx 2025-05-13 17:38:16 -07:00
parent df3e191620
commit 41cc1bfe51
4 changed files with 21 additions and 19 deletions
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4
ide/vs2022/mimalloc-test-stress.vcxproj
View file

@ -282,8 +282,8 @@
</ClCompile>
</ItemGroup>
<ItemGroup>
<ProjectReference Include="mimalloc-lib.vcxproj">
<Project>{abb5eae7-b3e6-432e-b636-333449892ea6}</Project>
<ProjectReference Include="mimalloc-override-dll.vcxproj">
<Project>{abb5eae7-b3e6-432e-b636-333449892ea7}</Project>
</ProjectReference>
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />

2
include/mimalloc/prim.h
View file

@ -208,7 +208,7 @@ static inline void mi_prim_tls_slot_set(size_t slot, void* value) mi_attr_noexce
// thread-local initialization checks in the fast path.
// We allocate a user TLS slot at process initialization (see `windows/prim.c`)
// and store the offset `_mi_win_tls_offset`.
#define MI_HAS_TLS_SLOT 2 // 2 = we can reliably initialize the slot (saving a test on each malloc)
#define MI_HAS_TLS_SLOT 1 // 2 = we can reliably initialize the slot (saving a test on each malloc)
extern mi_decl_hidden size_t _mi_win_tls_offset;

1
src/init.c
View file

@ -225,7 +225,6 @@ mi_heap_t* _mi_heap_main_get(void) {
return &_mi_heap_main;
}
/* -----------------------------------------------------------
Sub process
----------------------------------------------------------- */

33
src/prim/windows/prim.c
View file

@ -631,18 +631,23 @@ bool _mi_prim_random_buf(void* buf, size_t buf_len) {
mi_decl_cache_align size_t _mi_win_tls_offset = 0;
#endif
//static void mi_debug_out(const char* s) {
// HANDLE h = GetStdHandle(STD_ERROR_HANDLE);
// WriteConsole(h, s, (DWORD)_mi_strlen(s), NULL, NULL);
//}
static void mi_win_tls_init(DWORD reason) {
#if MI_HAS_TLS_SLOT >= 2 // we must initialize the TLS slot before any allocation
#if MI_WIN_USE_FIXED_TLS==1
if (reason==DLL_PROCESS_ATTACH && _mi_win_tls_offset == 0) {
const DWORD tls_slot = TlsAlloc(); // usually returns slot 1
if (tls_slot == TLS_OUT_OF_INDEXES) {
_mi_error_message(EFAULT, "unable to allocate the a TLS slot (rebuild without MI_WIN_USE_FIXED_TLS?)\n");
}
_mi_win_tls_offset = (size_t)tls_slot * sizeof(void*);
}
#endif
if (reason==DLL_PROCESS_ATTACH || reason==DLL_THREAD_ATTACH) {
#if MI_WIN_USE_FIXED_TLS==1 // we must allocate a TLS slot dynamically
if (_mi_win_tls_offset == 0 && reason=DLL_PROCESS_ATTACH) {
const DWORD tls_slot = TlsAlloc(); // usually returns slot 1
if (tls_slot == TLS_OUT_OF_INDEXES) {
_mi_error_message(EFAULT, "unable to allocate the a TLS slot (rebuild without MI_WIN_USE_FIXED_TLS?)\n");
}
_mi_win_tls_offset = (size_t)tls_slot * sizeof(void*);
}
#endif
#if MI_HAS_TLS_SLOT >= 2 // we must initialize the TLS slot before any allocation
if (mi_prim_get_default_heap() == NULL) {
_mi_heap_set_default_direct((mi_heap_t*)&_mi_heap_empty);
#if MI_DEBUG && MI_WIN_USE_FIXED_TLS==1
@ -650,10 +655,8 @@ static void mi_win_tls_init(DWORD reason) {
mi_assert_internal(p == (void*)&_mi_heap_empty);
#endif
}
}
#else
MI_UNUSED(reason);
#endif
#endif
}
}
static void NTAPI mi_win_main(PVOID module, DWORD reason, LPVOID reserved) {
@ -676,7 +679,7 @@ static void NTAPI mi_win_main(PVOID module, DWORD reason, LPVOID reserved) {
#define MI_PRIM_HAS_PROCESS_ATTACH 1
// Windows DLL: easy to hook into process_init and thread_done
BOOL WINAPI DllMain(HINSTANCE inst, DWORD reason, LPVOID reserved) {
BOOL WINAPI DllMain(HINSTANCE inst, DWORD reason, LPVOID reserved) {
mi_win_main((PVOID)inst,reason,reserved);
return TRUE;
}