diff options
Diffstat (limited to 'src/gc/gcinterface.dac.h')
| -rw-r--r-- | src/gc/gcinterface.dac.h | 61 |
1 files changed, 52 insertions, 9 deletions
diff --git a/src/gc/gcinterface.dac.h b/src/gc/gcinterface.dac.h index 647101fa1f..93698c05a9 100644 --- a/src/gc/gcinterface.dac.h +++ b/src/gc/gcinterface.dac.h @@ -11,12 +11,14 @@ // GC-internal type's fields, while still maintaining the same layout. // This interface is strictly versioned, see gcinterface.dacvars.def for more information. -#define NUM_GC_DATA_POINTS 9 -#define MAX_COMPACT_REASONS_COUNT 11 -#define MAX_EXPAND_MECHANISMS_COUNT 6 -#define MAX_GC_MECHANISM_BITS_COUNT 2 -#define MAX_GLOBAL_GC_MECHANISMS_COUNT 6 -#define NUMBERGENERATIONS 4 +#define NUM_GC_DATA_POINTS 9 +#define MAX_COMPACT_REASONS_COUNT 11 +#define MAX_EXPAND_MECHANISMS_COUNT 6 +#define MAX_GC_MECHANISM_BITS_COUNT 2 +#define MAX_GLOBAL_GC_MECHANISMS_COUNT 6 +#define NUMBERGENERATIONS 4 +#define INITIAL_HANDLE_TABLE_ARRAY_SIZE 10 +#define HANDLE_MAX_INTERNAL_TYPES 12 // Analogue for the GC heap_segment class, containing information regarding a single // heap segment. @@ -49,6 +51,32 @@ public: uint8_t** m_FillPointers[NUMBERGENERATIONS + ExtraSegCount]; }; +class dac_handle_table { +public: + // On the handle table side, this is an ADIndex. They should still have + // the same layout. + // + // We do try to keep everything that the DAC knows about as close to the + // start of the struct as possible to avoid having padding members. However, + // HandleTable has rgTypeFlags at offset 0 for performance reasons and + // we don't want to disrupt that. + uint32_t padding[HANDLE_MAX_INTERNAL_TYPES]; + DWORD uADIndex; +}; + +class dac_handle_table_bucket { +public: + DPTR(DPTR(dac_handle_table)) pTable; + uint32_t HandleTableIndex; +}; + +class dac_handle_table_map { +public: + DPTR(DPTR(dac_handle_table_bucket)) pBuckets; + DPTR(dac_handle_table_map) pNext; + uint32_t dwMaxIndex; +}; + // Possible values of the current_c_gc_state dacvar, indicating the state of // a background GC. enum c_gc_state @@ -132,6 +160,23 @@ public: }; +// The DAC links against six symbols that build as part of the VM DACCESS_COMPILE +// build. These symbols are considered to be GC-private functions, but the DAC needs +// to use them in order to perform some handle-related functions. These six functions +// are adorned by this macro to make clear that their implementations must be versioned +// alongside the rest of this file. +// +// Practically, this macro ensures that the target symbols aren't mangled, since the +// DAC calls them with a signature slightly different than the one used when they +// were defined. +#define GC_DAC_VISIBLE + +#ifdef DACCESS_COMPILE +#define GC_DAC_VISIBLE_NO_MANGLE extern "C" +#else +#define GC_DAC_VISIBLE_NO_MANGLE +#endif // DACCESS_COMPILE + // The actual structure containing the DAC variables. When DACCESS_COMPILE is not // defined (i.e. the normal runtime build), this structure contains pointers to the // GC's global DAC variabels. When DACCESS_COMPILE is defined (i.e. the DAC build), @@ -142,9 +187,7 @@ struct GcDacVars { uint8_t minor_version_number; size_t generation_size; #ifdef DACCESS_COMPILE - #define GC_DAC_VAR(type, name) DPTR(type) name; - // ArrayDPTR doesn't allow decaying arrays to pointers, which - // avoids some accidental errors. + #define GC_DAC_VAR(type, name) DPTR(type) name; #define GC_DAC_PTR_VAR(type, name) DPTR(type*) name; #define GC_DAC_ARRAY_VAR(type, name) DPTR(type) name; #else |