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version(CRuntime_Microsoft)
{
extern(C)
{
extern __gshared void* __ImageBase;
extern __gshared uint _DP_beg;
extern __gshared uint _DP_end;
extern __gshared uint _TP_beg;
extern __gshared uint _TP_end;
}
alias _DPbegin = _DP_beg;
alias _DPend = _DP_end;
alias _TPbegin = _TP_beg;
alias _TPend = _TP_end;
__gshared void[] dataSection;
shared static this()
{
import core.internal.traits : externDFunc;
alias findImageSection = externDFunc!("rt.sections_win64.findImageSection",
void[] function(void* handle, string name) nothrow @nogc);
dataSection = findImageSection(&__ImageBase, ".data");
}
void[] tlsRange;
static this()
{
import core.internal.traits : externDFunc;
alias initTLSRanges = externDFunc!("rt.sections_win64.initTLSRanges",
void[] function() nothrow @nogc);
tlsRange = initTLSRanges();
}
version = ptrref_supported;
}
else version(Win32)
{
extern(C)
{
extern __gshared void* _DPbegin;
extern __gshared void* _DPend;
extern __gshared uint _TPbegin;
extern __gshared uint _TPend;
extern int _tlsstart;
extern int _tlsend;
}
void[] tlsRange;
static this()
{
tlsRange = (cast(void*)&_tlsstart)[0.. cast(void*)&_tlsend - cast(void*)&_tlsstart];
}
version = ptrref_supported;
}
struct Struct
{
int x;
Struct* next;
}
class Class
{
void* ptr;
}
struct Struc(T)
{
static T vtls;
static __gshared T vgshared;
}
__gshared Struct* gsharedStrctPtr2 = new Struct(7, new Struct(8, null));
int tlsInt;
void* tlsVar;
shared int sharedInt;
shared void* sharedVar;
__gshared void* gsharedVar;
__gshared void* gsharedVar2;
immutable int[] arr = [1, 2, 3];
string tlsStr;
__gshared Struct gsharedStrct;
Struct[3] tlsStrcArr;
Class tlsClss;
// expression initializers
string[] strArr = [ "a", "b" ];
__gshared Class gsharedClss = new Class;
__gshared Struct* gsharedStrctPtr = new Struct(7, new Struct(8, null));
debug(PRINT) import core.stdc.stdio;
void main()
{
version(ptrref_supported)
testRefPtr();
}
version(ptrref_supported):
bool findTlsPtr(const(void)* ptr)
{
debug(PRINT) printf("findTlsPtr %p\n", ptr);
for (uint* p = &_TPbegin; p < &_TPend; p++)
{
void* addr = tlsRange.ptr + *p;
debug(PRINT) printf(" try %p\n", addr);
assert(*p < tlsRange.length);
if (addr == ptr)
return true;
}
return false;
}
bool findDataPtr(const(void)* ptr)
{
debug(PRINT) printf("findDataPtr %p\n", ptr);
for (auto p = &_DPbegin; p < &_DPend; p++)
{
debug(PRINT) printf(" try %p\n", cast(void*) cast(size_t) *p);
version(CRuntime_Microsoft)
void* addr = dataSection.ptr + *p;
else
void* addr = *p;
if (addr == ptr)
return true;
}
return false;
}
void testRefPtr()
{
debug(PRINT) printf("&_DPbegin %p\n", &_DPbegin);
debug(PRINT) printf("&_DPend %p\n", &_DPend);
debug(PRINT) printf("&_TPbegin %p\n", &_TPbegin);
debug(PRINT) printf("&_TPend %p\n", &_TPend);
assert(!findDataPtr(cast(void*)&sharedInt));
assert(!findTlsPtr(&tlsInt));
assert(findDataPtr(cast(void*)&sharedVar));
assert(findDataPtr(&gsharedVar));
assert(findDataPtr(&gsharedStrct.next));
assert(findDataPtr(&(gsharedClss)));
assert(findDataPtr(&(gsharedClss.ptr)));
assert(findTlsPtr(&tlsVar));
assert(findTlsPtr(&tlsClss));
assert(findTlsPtr(&tlsStrcArr[0].next));
assert(findTlsPtr(&tlsStrcArr[1].next));
assert(findTlsPtr(&tlsStrcArr[2].next));
assert(!findTlsPtr(cast(size_t*)&tlsStr)); // length
assert(findTlsPtr(cast(size_t*)&tlsStr + 1)); // ptr
// monitor is manually managed
assert(!findDataPtr(cast(size_t*)cast(void*)Class.classinfo + 1));
assert(!findDataPtr(cast(size_t*)cast(void*)Class.classinfo + 1));
assert(!findDataPtr(&arr));
assert(!findTlsPtr(&arr));
assert(!findDataPtr(cast(size_t*)&arr + 1));
assert(!findTlsPtr(cast(size_t*)&arr + 1));
assert(findDataPtr(cast(size_t*)&strArr[0] + 1)); // ptr in _DATA!
assert(findDataPtr(cast(size_t*)&strArr[1] + 1)); // ptr in _DATA!
strArr[1] = "c";
assert(findDataPtr(&gsharedStrctPtr));
assert(findDataPtr(&gsharedStrctPtr.next));
assert(findDataPtr(&gsharedStrctPtr.next.next));
assert(findDataPtr(&(Struc!(int*).vgshared)));
assert(!findDataPtr(&(Struc!(int).vgshared)));
assert(findTlsPtr(&(Struc!(int*).vtls)));
assert(!findTlsPtr(&(Struc!(int).vtls)));
}
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