try-catch.cpp
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// This test is broken with shared libstdc++ / libc++ on Android.
// RUN: %clangxx_hwasan -static-libstdc++ %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=GOOD
// RUN: %clangxx_hwasan -static-libstdc++ -DNO_SANITIZE_F %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=GOOD
// RUN: %clangxx_hwasan_oldrt -static-libstdc++ %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefix=GOOD
// RUN: %clangxx_hwasan_oldrt -static-libstdc++ %s -mllvm -hwasan-instrument-landing-pads=0 -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=BAD
// C++ tests on x86_64 require instrumented libc++/libstdc++.
// REQUIRES: aarch64-target-arch
#include <stdexcept>
#include <cstdio>
static void optimization_barrier(void* arg) {
asm volatile("" : : "r"(arg) : "memory");
}
__attribute__((noinline))
void h() {
char x[1000];
optimization_barrier(x);
throw std::runtime_error("hello");
}
__attribute__((noinline))
void g() {
char x[1000];
optimization_barrier(x);
h();
optimization_barrier(x);
}
__attribute__((noinline))
void hwasan_read(char *p, int size) {
char volatile sink;
for (int i = 0; i < size; ++i)
sink = p[i];
}
__attribute__((noinline, no_sanitize("hwaddress"))) void after_catch() {
char x[10000];
hwasan_read(&x[0], sizeof(x));
}
__attribute__((noinline))
#ifdef NO_SANITIZE_F
__attribute__((no_sanitize("hwaddress")))
#endif
void f() {
char x[1000];
try {
// Put two tagged frames on the stack, throw an exception from the deepest one.
g();
} catch (const std::runtime_error &e) {
// Put an untagged frame on stack, check that it is indeed untagged.
// This relies on exception support zeroing out stack tags.
// BAD: tag-mismatch
after_catch();
// Check that an in-scope stack allocation is still tagged.
// This relies on exception support not zeroing too much.
hwasan_read(&x[0], sizeof(x));
// GOOD: hello
printf("%s\n", e.what());
}
}
int main() {
f();
}