forked from OSchip/llvm-project
43 lines
958 B
C++
43 lines
958 B
C++
// Test __msan_set_indirect_call_wrapper.
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// RUN: %clangxx_msan -mllvm -msan-wrap-indirect-calls=__msan_wrap_indirect_call \
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// RUN: -mllvm -msan-wrap-indirect-calls-fast=0 \
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// RUN: -O0 -g -rdynamic -Wl,--defsym=__executable_start=0 %s -o %t && %t
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// This test disables -msan-wrap-indirect-calls-fast, otherwise indirect calls
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// inside the same module are short-circuited and are never seen by the wrapper.
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#include <assert.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdint.h>
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extern "C" void __msan_set_indirect_call_wrapper(uintptr_t);
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bool done_f, done_g;
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void f(void) {
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assert(!done_g);
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done_f = true;
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}
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void g(void) {
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assert(done_f);
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done_g = true;
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}
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typedef void (*Fn)(void);
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extern "C" Fn my_wrapper(Fn target) {
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if (target == f) return g;
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return target;
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}
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int main(void) {
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volatile Fn fp;
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fp = &f;
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fp();
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__msan_set_indirect_call_wrapper((uintptr_t)my_wrapper);
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fp();
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return !(done_f && done_g);
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}
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