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[Coverage] Add testing to validate code coverage for exceptions #133463

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May 20, 2025
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[Coverage] Add testing to validate code coverage for exceptions #133463

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144 changes: 144 additions & 0 deletions compiler-rt/test/profile/Linux/coverage-exception.cpp
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Original file line number Diff line number Diff line change
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// REQUIRES: lld-available
// XFAIL: powerpc64-target-arch

// RUN: %clangxx_profgen -std=c++17 -fuse-ld=lld -fcoverage-mapping -o %t %s
// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
// RUN: llvm-profdata merge -o %t.profdata %t.profraw
// RUN: llvm-cov show %t -instr-profile=%t.profdata 2>&1 | FileCheck %s

#include <stdio.h>
#include <stdlib.h>

#define TRY_AND_CATCH_ALL(x) \
try { \
(x); \
} catch (...) { \
}

#define TRY_MAYBE_CRASH(x) \
try { \
if ((x)) { \
printf("no crash\n"); \
} else { \
abort(); \
} \
} catch (...) { \
}

#define TRY_AND_CATCH_CRASHES(x) \
try { \
(x); \
} catch (...) { \
abort(); \
}

static __attribute__((noinline)) int do_throw(bool b) {
if (b)
throw b;
return 1;
}

// clang-format off
static
int test_no_exception() { // CHECK: [[@LINE]]| 1|int test_no_exception()
try { // CHECK: [[@LINE]]| 1| try {
do_throw(false); // CHECK: [[@LINE]]| 1| do_throw(
} catch (...) { // CHECK: [[@LINE]]| 1| } catch (
abort(); // CHECK: [[@LINE]]| 0| abort(
} // CHECK: [[@LINE]]| 0| }
printf("%s\n", __func__); // CHECK: [[@LINE]]| 1| printf(
return 0; // CHECK: [[@LINE]]| 1| return
} // CHECK: [[@LINE]]| 1|}

static
int test_no_exception_macro() { // CHECK: [[@LINE]]| 1|int test_no_exception_macro()
TRY_AND_CATCH_ALL(do_throw(false)); // CHECK: [[@LINE]]| 1| TRY_AND_CATCH_ALL(
printf("%s\n", __func__); // CHECK: [[@LINE]]| 1| printf(
return 0; // CHECK: [[@LINE]]| 1| return
} // CHECK: [[@LINE]]| 1|}

static
int test_exception() { // CHECK: [[@LINE]]| 1|int test_exception()
try { // CHECK: [[@LINE]]| 1| try {
do_throw(true); // CHECK: [[@LINE]]| 1| do_throw(
} catch (...) { // CHECK: [[@LINE]]| 1| } catch (
printf("%s\n", __func__); // CHECK: [[@LINE]]| 1| printf(
} // CHECK: [[@LINE]]| 1| }
return 0; // CHECK: [[@LINE]]| 1| return
} // CHECK: [[@LINE]]| 1|}

static
int test_exception_macro() { // CHECK: [[@LINE]]| 1|int test_exception_macro()
TRY_AND_CATCH_ALL(do_throw(true)); // CHECK: [[@LINE]]| 1| TRY_AND_CATCH_ALL(
printf("%s\n", __func__); // CHECK: [[@LINE]]| 1| printf(
return 0; // CHECK: [[@LINE]]| 1| return
} // CHECK: [[@LINE]]| 1|}

static
int test_exception_macro_nested() { // CHECK: [[@LINE]]| 1|int test_exception_macro_nested()
try { // CHECK: [[@LINE]]| 1| try {
TRY_AND_CATCH_ALL(do_throw(true)); // CHECK: [[@LINE]]| 1| TRY_AND_CATCH_ALL(
} catch (...) { // CHECK: [[@LINE]]| 1| } catch (
abort(); // CHECK: [[@LINE]]| 0| abort(
} // CHECK: [[@LINE]]| 0| }
printf("%s\n", __func__); // CHECK: [[@LINE]]| 1| printf(
return 0; // CHECK: [[@LINE]]| 1| return
} // CHECK: [[@LINE]]| 1|}

static
int test_exception_try_crash() { // CHECK: [[@LINE]]| 1|int test_exception_try_crash()
TRY_MAYBE_CRASH(do_throw(false)); // CHECK: [[@LINE]]| 1| TRY_MAYBE_CRASH(
printf("%s\n", __func__); // CHECK: [[@LINE]]| 1| printf(
return 0; // CHECK: [[@LINE]]| 1| return
} // CHECK: [[@LINE]]| 1|}

static
int test_exception_crash() { // CHECK: [[@LINE]]| 1|int test_exception_crash()
TRY_AND_CATCH_CRASHES(do_throw(false)); // CHECK: [[@LINE]]| 1| TRY_AND_CATCH_CRASHES(
printf("%s\n", __func__); // CHECK: [[@LINE]]| 1| printf(
return 0; // CHECK: [[@LINE]]| 1| return
} // CHECK: [[@LINE]]| 1|}

static
int test_conditional(int i) { // CHECK: [[@LINE]]| 1|int test_conditional(int i)
try { // CHECK: [[@LINE]]| 1| try {
if (i % 2 == 0) { // CHECK: [[@LINE]]| 1| if (
printf("%s\n", __func__); // CHECK: [[@LINE]]| 1| printf(
} else { // CHECK: [[@LINE]]| 1| } else {
do_throw(true); // CHECK: [[@LINE]]| 0| do_throw(
} // CHECK: [[@LINE]]| 0| }
} catch (...) { // CHECK: [[@LINE]]| 1| } catch (
abort(); // CHECK: [[@LINE]]| 0| abort(
} // CHECK: [[@LINE]]| 0| }
return 0; // CHECK: [[@LINE]]| 1| return
}

static
int test_multiple_catch() { // CHECK: [[@LINE]]| 1|int test_multiple_catch()
try { // CHECK: [[@LINE]]| 1| try {
do_throw(true); // CHECK: [[@LINE]]| 1| do_throw(
} catch (double) { // CHECK: [[@LINE]]| 1| } catch (double)
abort(); // CHECK: [[@LINE]]| 0| abort(
} catch (bool) { // CHECK: [[@LINE]]| 1| } catch (bool)
printf("bool\n"); // CHECK: [[@LINE]]| 1| printf(
} catch (float) { // CHECK: [[@LINE]]| 1| } catch (float)
abort(); // CHECK: [[@LINE]]| 0| abort(
} catch (...) { // CHECK: [[@LINE]]| 0| } catch (
abort(); // CHECK: [[@LINE]]| 0| abort(
} // CHECK: [[@LINE]]| 0| }
return 0; // CHECK: [[@LINE]]| 1| return
} // CHECK: [[@LINE]]| 1|}

int main() { // CHECK: [[@LINE]]| 1|int main()
test_no_exception(); // CHECK: [[@LINE]]| 1| test_no_exception(
test_no_exception_macro(); // CHECK: [[@LINE]]| 1| test_no_exception_macro(
test_exception(); // CHECK: [[@LINE]]| 1| test_exception(
test_exception_macro(); // CHECK: [[@LINE]]| 1| test_exception_macro(
test_exception_macro_nested(); // CHECK: [[@LINE]]| 1| test_exception_macro_nested(
test_exception_try_crash(); // CHECK: [[@LINE]]| 1| test_exception_try_crash(
test_exception_crash(); // CHECK: [[@LINE]]| 1| test_exception_crash(
test_conditional(2); // CHECK: [[@LINE]]| 1| test_conditional(
test_multiple_catch(); // CHECK: [[@LINE]]| 1| test_multiple_catch(
return 0; // CHECK: [[@LINE]]| 1| return
} // CHECK: [[@LINE]]| 1|}
// clang-format on
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