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Source file src/runtime/race/testdata/map_test.go

Documentation: runtime/race/testdata

     1  // Copyright 2012 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package race_test
     6  
     7  import (
     8  	"testing"
     9  )
    10  
    11  func TestRaceMapRW(t *testing.T) {
    12  	m := make(map[int]int)
    13  	ch := make(chan bool, 1)
    14  	go func() {
    15  		_ = m[1]
    16  		ch <- true
    17  	}()
    18  	m[1] = 1
    19  	<-ch
    20  }
    21  
    22  func TestRaceMapRW2(t *testing.T) {
    23  	m := make(map[int]int)
    24  	ch := make(chan bool, 1)
    25  	go func() {
    26  		_, _ = m[1]
    27  		ch <- true
    28  	}()
    29  	m[1] = 1
    30  	<-ch
    31  }
    32  
    33  func TestRaceMapRWArray(t *testing.T) {
    34  	// Check instrumentation of unaddressable arrays (issue 4578).
    35  	m := make(map[int][2]int)
    36  	ch := make(chan bool, 1)
    37  	go func() {
    38  		_ = m[1][1]
    39  		ch <- true
    40  	}()
    41  	m[2] = [2]int{1, 2}
    42  	<-ch
    43  }
    44  
    45  func TestNoRaceMapRR(t *testing.T) {
    46  	m := make(map[int]int)
    47  	ch := make(chan bool, 1)
    48  	go func() {
    49  		_, _ = m[1]
    50  		ch <- true
    51  	}()
    52  	_ = m[1]
    53  	<-ch
    54  }
    55  
    56  func TestRaceMapRange(t *testing.T) {
    57  	m := make(map[int]int)
    58  	ch := make(chan bool, 1)
    59  	go func() {
    60  		for range m {
    61  		}
    62  		ch <- true
    63  	}()
    64  	m[1] = 1
    65  	<-ch
    66  }
    67  
    68  func TestRaceMapRange2(t *testing.T) {
    69  	m := make(map[int]int)
    70  	ch := make(chan bool, 1)
    71  	go func() {
    72  		for range m {
    73  		}
    74  		ch <- true
    75  	}()
    76  	m[1] = 1
    77  	<-ch
    78  }
    79  
    80  func TestNoRaceMapRangeRange(t *testing.T) {
    81  	m := make(map[int]int)
    82  	// now the map is not empty and range triggers an event
    83  	// should work without this (as in other tests)
    84  	// so it is suspicious if this test passes and others don't
    85  	m[0] = 0
    86  	ch := make(chan bool, 1)
    87  	go func() {
    88  		for range m {
    89  		}
    90  		ch <- true
    91  	}()
    92  	for range m {
    93  	}
    94  	<-ch
    95  }
    96  
    97  func TestRaceMapLen(t *testing.T) {
    98  	m := make(map[string]bool)
    99  	ch := make(chan bool, 1)
   100  	go func() {
   101  		_ = len(m)
   102  		ch <- true
   103  	}()
   104  	m[""] = true
   105  	<-ch
   106  }
   107  
   108  func TestRaceMapDelete(t *testing.T) {
   109  	m := make(map[string]bool)
   110  	ch := make(chan bool, 1)
   111  	go func() {
   112  		delete(m, "")
   113  		ch <- true
   114  	}()
   115  	m[""] = true
   116  	<-ch
   117  }
   118  
   119  func TestRaceMapLenDelete(t *testing.T) {
   120  	m := make(map[string]bool)
   121  	ch := make(chan bool, 1)
   122  	go func() {
   123  		delete(m, "a")
   124  		ch <- true
   125  	}()
   126  	_ = len(m)
   127  	<-ch
   128  }
   129  
   130  func TestRaceMapVariable(t *testing.T) {
   131  	ch := make(chan bool, 1)
   132  	m := make(map[int]int)
   133  	_ = m
   134  	go func() {
   135  		m = make(map[int]int)
   136  		ch <- true
   137  	}()
   138  	m = make(map[int]int)
   139  	<-ch
   140  }
   141  
   142  func TestRaceMapVariable2(t *testing.T) {
   143  	ch := make(chan bool, 1)
   144  	m := make(map[int]int)
   145  	go func() {
   146  		m[1] = 1
   147  		ch <- true
   148  	}()
   149  	m = make(map[int]int)
   150  	<-ch
   151  }
   152  
   153  func TestRaceMapVariable3(t *testing.T) {
   154  	ch := make(chan bool, 1)
   155  	m := make(map[int]int)
   156  	go func() {
   157  		_ = m[1]
   158  		ch <- true
   159  	}()
   160  	m = make(map[int]int)
   161  	<-ch
   162  }
   163  
   164  type Big struct {
   165  	x [17]int32
   166  }
   167  
   168  func TestRaceMapLookupPartKey(t *testing.T) {
   169  	k := &Big{}
   170  	m := make(map[Big]bool)
   171  	ch := make(chan bool, 1)
   172  	go func() {
   173  		k.x[8] = 1
   174  		ch <- true
   175  	}()
   176  	_ = m[*k]
   177  	<-ch
   178  }
   179  
   180  func TestRaceMapLookupPartKey2(t *testing.T) {
   181  	k := &Big{}
   182  	m := make(map[Big]bool)
   183  	ch := make(chan bool, 1)
   184  	go func() {
   185  		k.x[8] = 1
   186  		ch <- true
   187  	}()
   188  	_, _ = m[*k]
   189  	<-ch
   190  }
   191  func TestRaceMapDeletePartKey(t *testing.T) {
   192  	k := &Big{}
   193  	m := make(map[Big]bool)
   194  	ch := make(chan bool, 1)
   195  	go func() {
   196  		k.x[8] = 1
   197  		ch <- true
   198  	}()
   199  	delete(m, *k)
   200  	<-ch
   201  }
   202  
   203  func TestRaceMapInsertPartKey(t *testing.T) {
   204  	k := &Big{}
   205  	m := make(map[Big]bool)
   206  	ch := make(chan bool, 1)
   207  	go func() {
   208  		k.x[8] = 1
   209  		ch <- true
   210  	}()
   211  	m[*k] = true
   212  	<-ch
   213  }
   214  
   215  func TestRaceMapInsertPartVal(t *testing.T) {
   216  	v := &Big{}
   217  	m := make(map[int]Big)
   218  	ch := make(chan bool, 1)
   219  	go func() {
   220  		v.x[8] = 1
   221  		ch <- true
   222  	}()
   223  	m[1] = *v
   224  	<-ch
   225  }
   226  
   227  // Test for issue 7561.
   228  func TestRaceMapAssignMultipleReturn(t *testing.T) {
   229  	connect := func() (int, error) { return 42, nil }
   230  	conns := make(map[int][]int)
   231  	conns[1] = []int{0}
   232  	ch := make(chan bool, 1)
   233  	var err error
   234  	_ = err
   235  	go func() {
   236  		conns[1][0], err = connect()
   237  		ch <- true
   238  	}()
   239  	x := conns[1][0]
   240  	_ = x
   241  	<-ch
   242  }
   243  
   244  // BigKey and BigVal must be larger than 256 bytes,
   245  // so that compiler sets KindGCProg for them.
   246  type BigKey [1000]*int
   247  
   248  type BigVal struct {
   249  	x int
   250  	y [1000]*int
   251  }
   252  
   253  func TestRaceMapBigKeyAccess1(t *testing.T) {
   254  	m := make(map[BigKey]int)
   255  	var k BigKey
   256  	ch := make(chan bool, 1)
   257  	go func() {
   258  		_ = m[k]
   259  		ch <- true
   260  	}()
   261  	k[30] = new(int)
   262  	<-ch
   263  }
   264  
   265  func TestRaceMapBigKeyAccess2(t *testing.T) {
   266  	m := make(map[BigKey]int)
   267  	var k BigKey
   268  	ch := make(chan bool, 1)
   269  	go func() {
   270  		_, _ = m[k]
   271  		ch <- true
   272  	}()
   273  	k[30] = new(int)
   274  	<-ch
   275  }
   276  
   277  func TestRaceMapBigKeyInsert(t *testing.T) {
   278  	m := make(map[BigKey]int)
   279  	var k BigKey
   280  	ch := make(chan bool, 1)
   281  	go func() {
   282  		m[k] = 1
   283  		ch <- true
   284  	}()
   285  	k[30] = new(int)
   286  	<-ch
   287  }
   288  
   289  func TestRaceMapBigKeyDelete(t *testing.T) {
   290  	m := make(map[BigKey]int)
   291  	var k BigKey
   292  	ch := make(chan bool, 1)
   293  	go func() {
   294  		delete(m, k)
   295  		ch <- true
   296  	}()
   297  	k[30] = new(int)
   298  	<-ch
   299  }
   300  
   301  func TestRaceMapBigValInsert(t *testing.T) {
   302  	m := make(map[int]BigVal)
   303  	var v BigVal
   304  	ch := make(chan bool, 1)
   305  	go func() {
   306  		m[1] = v
   307  		ch <- true
   308  	}()
   309  	v.y[30] = new(int)
   310  	<-ch
   311  }
   312  
   313  func TestRaceMapBigValAccess1(t *testing.T) {
   314  	m := make(map[int]BigVal)
   315  	var v BigVal
   316  	ch := make(chan bool, 1)
   317  	go func() {
   318  		v = m[1]
   319  		ch <- true
   320  	}()
   321  	v.y[30] = new(int)
   322  	<-ch
   323  }
   324  
   325  func TestRaceMapBigValAccess2(t *testing.T) {
   326  	m := make(map[int]BigVal)
   327  	var v BigVal
   328  	ch := make(chan bool, 1)
   329  	go func() {
   330  		v, _ = m[1]
   331  		ch <- true
   332  	}()
   333  	v.y[30] = new(int)
   334  	<-ch
   335  }
   336  

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