freebsd-nq/test/msan/param_tls_limit.cc

79 lines
1.6 KiB
C++

// ParamTLS has limited size. Everything that does not fit is considered fully
// initialized.
// RUN: %clangxx_msan -O0 %s -o %t && %run %t
// RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && %run %t
// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O0 %s -o %t && %run %t
//
// AArch64 fails with:
// void f801(S<801>): Assertion `__msan_test_shadow(&s, sizeof(s)) == -1' failed
// XFAIL: aarch64
#include <sanitizer/msan_interface.h>
#include <assert.h>
// This test assumes that ParamTLS size is 800 bytes.
// This test passes poisoned values through function argument list.
// In case of overflow, argument is unpoisoned.
#define OVERFLOW(x) assert(__msan_test_shadow(&x, sizeof(x)) == -1)
// In case of no overflow, it is still poisoned.
#define NO_OVERFLOW(x) assert(__msan_test_shadow(&x, sizeof(x)) == 0)
template<int N>
struct S {
char x[N];
};
void f100(S<100> s) {
NO_OVERFLOW(s);
}
void f800(S<800> s) {
NO_OVERFLOW(s);
}
void f801(S<801> s) {
OVERFLOW(s);
}
void f1000(S<1000> s) {
OVERFLOW(s);
}
void f_many(int a, double b, S<800> s, int c, double d) {
NO_OVERFLOW(a);
NO_OVERFLOW(b);
OVERFLOW(s);
OVERFLOW(c);
OVERFLOW(d);
}
// -8 bytes for "int a", aligned by 8
// -2 to make "int c" a partial fit
void f_many2(int a, S<800 - 8 - 2> s, int c, double d) {
NO_OVERFLOW(a);
NO_OVERFLOW(s);
OVERFLOW(c);
OVERFLOW(d);
}
int main(void) {
S<100> s100;
S<800> s800;
S<801> s801;
S<1000> s1000;
f100(s100);
f800(s800);
f801(s801);
f1000(s1000);
int i;
double d;
f_many(i, d, s800, i, d);
S<800 - 8 - 2> s788;
f_many2(i, s788, i, d);
return 0;
}