100 lines
4.2 KiB
C++
100 lines
4.2 KiB
C++
// RUN: %clang_cc1 -Wunsafe-buffer-usage -fsafe-buffer-usage-suggestions \
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// RUN: -std=c++20 -verify=expected %s
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// RUN: %clang_cc1 -Wunsafe-buffer-usage -fsafe-buffer-usage-suggestions \
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// RUN: -mllvm -debug-only=SafeBuffers \
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// RUN: -std=c++20 -verify=expected,debug %s
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// A generic -debug would also enable our notes. This is probably fine.
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//
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// RUN: %clang_cc1 -Wunsafe-buffer-usage -fsafe-buffer-usage-suggestions \
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// RUN: -std=c++20 -mllvm -debug \
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// RUN: -verify=expected,debug %s
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// This test file checks the behavior under the assumption that no fixits
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// were emitted for the test cases. If -Wunsafe-buffer-usage is improved
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// to support these cases (thus failing the test), the test should be changed
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// to showcase a different unsupported example.
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//
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// RUN: %clang_cc1 -Wunsafe-buffer-usage -fsafe-buffer-usage-suggestions \
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// RUN: -mllvm -debug-only=SafeBuffers \
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// RUN: -std=c++20 -fdiagnostics-parseable-fixits %s \
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// RUN: 2>&1 | FileCheck %s
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// CHECK-NOT: fix-it:
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// This debugging facility is only available in debug builds.
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//
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// REQUIRES: asserts
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void foo() {
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int *x = new int[10]; // expected-warning{{'x' is an unsafe pointer used for buffer access}}
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x[5] = 10; // expected-note{{used in buffer access here}}
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int z = x[-1]; // expected-note{{used in buffer access here}} \
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// debug-note{{safe buffers debug: gadget 'ULCArraySubscript' refused to produce a fix}}
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}
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void failed_decl() {
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int a[10]; // expected-warning{{'a' is an unsafe buffer that does not perform bounds checks}} \
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// debug-note{{safe buffers debug: failed to produce fixit for declaration 'a' : not a pointer}}
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for (int i = 0; i < 10; i++) {
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a[i] = i; // expected-note{{used in buffer access here}}
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}
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}
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void failed_multiple_decl() {
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int *a = new int[4], b; // expected-warning{{'a' is an unsafe pointer used for buffer access}} \
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// debug-note{{safe buffers debug: failed to produce fixit for declaration 'a' : multiple VarDecls}}
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a[4] = 3; // expected-note{{used in buffer access here}}
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}
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void failed_param_var_decl(int *a =new int[3]) { // expected-warning{{'a' is an unsafe pointer used for buffer access}} \
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// debug-note{{safe buffers debug: failed to produce fixit for declaration 'a' : has default arg}}
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a[4] = 6; // expected-note{{used in buffer access here}}
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}
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void unclaimed_use() {
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int *a = new int[3]; // expected-warning{{'a' is an unsafe pointer used for buffer access}}
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a[2] = 9; // expected-note{{used in buffer access here}}
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int *b = a++; // expected-note{{used in pointer arithmetic here}} \
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// debug-note{{safe buffers debug: failed to produce fixit for 'a' : has an unclaimed use}}
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}
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void implied_unclaimed_var(int *b) { // expected-warning{{'b' is an unsafe pointer used for buffer access}}
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int *a = new int[3]; // expected-warning{{'a' is an unsafe pointer used for buffer access}}
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a[4] = 7; // expected-note{{used in buffer access here}}
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a = b; // debug-note{{safe buffers debug: gadget 'PointerAssignment' refused to produce a fix}}
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b++; // expected-note{{used in pointer arithmetic here}} \
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// debug-note{{safe buffers debug: failed to produce fixit for 'b' : has an unclaimed use}}
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}
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int *a = new int[3]; // expected-warning{{'a' is an unsafe pointer used for buffer access}} \
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// debug-note{{safe buffers debug: failed to produce fixit for 'a' : neither local nor a parameter}}
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void test_globals() {
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a[7] = 4; // expected-note{{used in buffer access here}}
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}
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void test_decomp_decl() {
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int a[2] = {1, 2};
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auto [x, y] = a;
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x = 9;
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}
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void test_claim_use_multiple() {
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int *a = new int[8]; // expected-warning{{'a' is an unsafe pointer used for buffer access}}
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a[6] = 9; // expected-note{{used in buffer access here}}
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a++; // expected-note{{used in pointer arithmetic here}} \
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// debug-note{{safe buffers debug: failed to produce fixit for 'a' : has an unclaimed use}}
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}
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struct S
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{
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int *x;
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};
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S f() { return S{new int[4]}; }
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void test_struct_claim_use() {
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auto [x] = f();
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x[6] = 8; // expected-warning{{unsafe buffer access}}
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x++; // expected-warning{{unsafe pointer arithmetic}}
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}
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