github.com/tencent/goom@v1.0.1/internal/hack/ifunc.go (about)

     1  //go:build !go1.16
     2  // +build !go1.16
     3  
     4  // Package hack 对 go 系统包的 hack, 包含一些系统结构体的 copy，需要和不同的 go 版本保持同步
     5  package hack
     6  
     7  import (
     8  	"unsafe"
     9  	// nolint
    10  	_ "unsafe"
    11  )
    12  
    13  // InterceptCallerSkip 拦截器 callerskip
    14  const InterceptCallerSkip = 7
    15  
    16  // Firstmoduledata keep async with runtime.Firstmoduledata
    17  //
    18  //go:linkname Firstmoduledata runtime.firstmoduledata
    19  var Firstmoduledata Moduledata
    20  
    21  // Moduledata keep async with runtime.Moduledata
    22  type Moduledata struct {
    23  	Pclntable []byte
    24  	Ftab      []Functab
    25  	// nolint
    26  	filetab []uint32
    27  	// nolint
    28  	findfunctab uintptr
    29  	// nolint
    30  	minpc, maxpc uintptr
    31  	// nolint
    32  	text, etext uintptr
    33  	// nolint
    34  	noptrdata, enoptrdata uintptr
    35  	// nolint
    36  	data, edata uintptr
    37  	// nolint
    38  	bss, ebss uintptr
    39  	// nolint
    40  	noptrbss, enoptrbss uintptr
    41  	// nolint
    42  	end, gcdata, gcbss uintptr
    43  	// nolint
    44  	types, etypes uintptr
    45  	// nolint
    46  	textsectmap []textsect
    47  	// Original type was []*Type
    48  	// nolint
    49  	typelinks []int32
    50  	// nolint
    51  	itablinks []*uintptr
    52  	// nolint
    53  	ptab []interface{}
    54  	// nolint
    55  	pluginpath string
    56  	// nolint
    57  	pkghashes []interface{}
    58  	// nolint
    59  	modulename string
    60  	// nolint
    61  	// Original type was []modulehash
    62  	modulehashes []interface{}
    63  	// nolint
    64  	hasmain uint8 // 1 if module contains the main function, 0 otherwise
    65  	// nolint
    66  	gcdatamask, gcbssmask Bitvector
    67  	// nolint
    68  	typemap map[typeOff]*interface{} // offset to *_rtype in previous module
    69  	// nolint
    70  	bad bool // module failed to load and should be ignored
    71  	// Next links next Moduledata
    72  	Next *Moduledata
    73  }
    74  
    75  // Functab Functab
    76  type Functab struct {
    77  	Entry   uintptr
    78  	Funcoff uintptr
    79  }
    80  
    81  // Func Convenience struct for modifying the underlying code pointer of a function
    82  // value. The actual struct has other values, but always starts with a code
    83  // pointer.
    84  // TODO 不同 go 版本兼容
    85  type Func struct {
    86  	CodePtr uintptr
    87  }
    88  
    89  // Bitvector Bitvector
    90  type Bitvector struct {
    91  	// nolint
    92  	n int32 // # of bits
    93  	// nolint
    94  	bytedata *uint8
    95  }
    96  
    97  // nolint
    98  type textsect struct {
    99  	// nolint
   100  	vaddr    uintptr // prelinked section vaddr
   101  	length   uintptr // section length
   102  	baseaddr uintptr // relocated section address
   103  }
   104  
   105  // nolint
   106  type typeOff int32 // offset to an *rtype
   107  
   108  // Value reflect.Value
   109  // TODO 不同 go 版本兼容
   110  type Value struct {
   111  	Typ  *uintptr
   112  	Ptr  unsafe.Pointer
   113  	Flag uintptr
   114  }