clang/test/CodeGen/sanitize-coverage-gated-callbacks.c

   1 // RUN: %clang %s -target arm64-apple-darwin -emit-llvm -S -fsanitize-coverage=trace-pc-guard -mllvm -sanitizer-coverage-gated-trace-callbacks=1 -o - | FileCheck %s --check-prefixes=CHECK,GATED
   2 // RUN: %clang %s -target arm64-apple-darwin -emit-llvm -S -fsanitize-coverage=trace-pc-guard -mllvm -sanitizer-coverage-gated-trace-callbacks=0 -o - | FileCheck %s --check-prefixes=CHECK,PLAIN
   3 // RUN: not %clang %s -target arm64-apple-darwin -emit-llvm -S -fsanitize-coverage=trace-pc -mllvm -sanitizer-coverage-gated-trace-callbacks=1 -o /dev/null 2>&1 | FileCheck %s --check-prefixes=INCOMPATIBLE
   4 // RUN: not %clang %s -target arm64-apple-darwin -emit-llvm -S -fsanitize-coverage=inline-8bit-counters -mllvm -sanitizer-coverage-gated-trace-callbacks=1 -o /dev/null 2>&1 | FileCheck %s --check-prefixes=INCOMPATIBLE
   5 // RUN: not %clang %s -target arm64-apple-darwin -emit-llvm -S -fsanitize-coverage=inline-bool-flag -mllvm -sanitizer-coverage-gated-trace-callbacks=1 -o /dev/null 2>&1 | FileCheck %s --check-prefixes=INCOMPATIBLE
   6
   7 // Verify that we do not emit the __sancov_gate section for "plain" trace-pc-guard
   8 // GATED: section "__DATA,__sancov_gate"
   9 // PLAIN-NOT: section "__DATA,__sancov_gate"
  10
  11 // Produce an error for all incompatible sanitizer coverage modes.
  12 // INCOMPATIBLE: error: 'sanitizer-coverage-gated-trace-callbacks' is only supported with trace-pc-guard
  13
  14 int x[10];
  15
  16 // CHECK: define{{.*}} void @foo
  17 void foo(int n, int m) {
  18   // COM: Verify that we're emitting the call to __sanitizer_cov_trace_pc_guard upon
  19   // COM: checking the value of __sancov_should_track.
  20   // GATED: [[VAL:%.*]] = load i64, {{.*}}@__sancov_should_track
  21   // GATED-NOT: [[VAL:%.*]] = load i64, i64* @__sancov_should_track
  22   // GATED-NEXT: [[CMP:%.*]] = icmp ne i64 [[VAL]], 0
  23   // GATED-NEXT: br i1 [[CMP]], label %[[L_TRUE:.*]], label %[[L_FALSE:.*]], !prof [[WEIGHTS:!.+]]
  24   // GATED: [[L_TRUE]]:
  25   // GATED-NEXT:   call void @__sanitizer_cov_trace_pc_guard
  26   // GATED:   br i1 [[CMP]], label %[[L_TRUE_2:.*]], label %[[L_FALSE_2:.*]]
  27   // GATED: [[L_TRUE_2]]:
  28   // GATED-NEXT:   call void @__sanitizer_cov_trace_pc_guard
  29   // GATED: [[WEIGHTS]] = !{!"branch_weights", i32 1, i32 100000}
  30
  31   // COM: With the non-gated instrumentation, we should not emit the
  32   // COM: __sancov_should_track global.
  33   // PLAIN-NOT: __sancov_should_track
  34   // But we should still be emitting the calls to the callback.
  35   // PLAIN: call void @__sanitizer_cov_trace_pc_guard
  36   if (n) {
  37     x[n] = 42;
  38     if (m) {
  39       x[m] = 41;
  40     }
  41   }
  42 }