cca4d6cfd2
There are many issues that popped up with the counted_by feature. The patch #73730 has grown too large and approval is blocking Linux testing. Includes reverts of: commit769bc11f68("[Clang] Implement the 'counted_by' attribute (#68750)") commitbc09ec6962("[CodeGen] Revamp counted_by calculations (#70606)") commit1a09cfb2f3("[Clang] counted_by attr can apply only to C99 flexible array members (#72347)") commita76adfb992("[NFC][Clang] Refactor code to calculate flexible array member size (#72790)") commitd8447c78ab("[Clang] Correct handling of negative and out-of-bounds indices (#71877)") Partial commitb31cd07de5("[Clang] Regenerate test checks (NFC)") Closes #73168 Closes #75173
85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
// RUN: %clang_cc1 -fsanitize=local-bounds -emit-llvm -triple x86_64-apple-darwin10 %s -o - | FileCheck %s
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// RUN: %clang_cc1 -fsanitize=array-bounds -O -fsanitize-trap=array-bounds -emit-llvm -triple x86_64-apple-darwin10 -DNO_DYNAMIC %s -o - | FileCheck %s
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// RUN: %clang_cc1 -fsanitize=local-bounds -fsanitize-trap=local-bounds -O3 -mllvm -bounds-checking-unique-traps -emit-llvm -triple x86_64-apple-darwin10 %s -o - | FileCheck %s --check-prefixes=NOOPTLOCAL
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// RUN: %clang_cc1 -fsanitize=array-bounds -fsanitize-trap=array-bounds -O3 -mllvm -ubsan-unique-traps -emit-llvm -triple x86_64-apple-darwin10 %s -o - | FileCheck %s --check-prefixes=NOOPTARRAY
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//
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// REQUIRES: x86-registered-target
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// CHECK-LABEL: @f1
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double f1(int b, int i) {
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double a[b];
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// CHECK: call {{.*}} @llvm.{{(ubsan)?trap}}
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return a[i];
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}
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// CHECK-LABEL: @f2
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void f2(void) {
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// everything is constant; no trap possible
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// CHECK-NOT: call {{.*}} @llvm.{{(ubsan)?trap}}
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int a[2];
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a[1] = 42;
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#ifndef NO_DYNAMIC
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extern void *malloc(__typeof__(sizeof(0)));
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short *b = malloc(64);
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b[5] = *a + a[1] + 2;
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#endif
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}
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// CHECK-LABEL: @f3
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void f3(void) {
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int a[1];
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// CHECK: call {{.*}} @llvm.{{(ubsan)?trap}}
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a[2] = 1;
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}
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// CHECK-LABEL: @f4
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__attribute__((no_sanitize("bounds")))
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int f4(int i) {
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int b[64];
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// CHECK-NOT: call void @llvm.trap()
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// CHECK-NOT: trap:
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// CHECK-NOT: cont:
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return b[i];
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}
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// Union flexible-array memebers are a C99 extension. All array members with a
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// constant size should be considered FAMs.
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union U { int a[0]; int b[1]; int c[2]; };
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// CHECK-LABEL: @f5
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int f5(union U *u, int i) {
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// a is treated as a flexible array member.
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// CHECK-NOT: @llvm.ubsantrap
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return u->a[i];
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}
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// CHECK-LABEL: @f6
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int f6(union U *u, int i) {
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// b is treated as a flexible array member.
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// CHECK-NOT: call {{.*}} @llvm.{{(ubsan)?trap}}
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return u->b[i];
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}
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// CHECK-LABEL: @f7
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int f7(union U *u, int i) {
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// c is treated as a flexible array member.
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// CHECK-NOT: @llvm.ubsantrap
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return u->c[i];
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}
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char B[10];
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char B2[10];
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// CHECK-LABEL: @f8
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void f8(int i, int k) {
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// NOOPTLOCAL: call void @llvm.ubsantrap(i8 3)
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// NOOPTARRAY: call void @llvm.ubsantrap(i8 2)
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B[i] = '\0';
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// NOOPTLOCAL: call void @llvm.ubsantrap(i8 5)
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// NOOPTARRAY: call void @llvm.ubsantrap(i8 4)
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B2[k] = '\0';
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}
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