strncpy-overlap.cpp
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// RUN: %clangxx_asan -O0 %s -o %t
// RUN: not %run %t 2>&1 | FileCheck %s
// RUN: echo "interceptor_via_fun:bad_function" > %t.supp
// RUN: %env_asan_opts=suppressions='"%t.supp"' %run %t
// RUN: echo "interceptor_name:strncpy" > %t.supp
// RUN: %env_asan_opts=suppressions='"%t.supp"' %run %t
//
// RUN: %clangxx_asan -O1 %s -o %t
// RUN: not %run %t 2>&1 | FileCheck %s
// RUN: echo "interceptor_via_fun:bad_function" > %t.supp
// RUN: %env_asan_opts=suppressions='"%t.supp"' %run %t
// RUN: echo "interceptor_name:strncpy" > %t.supp
// RUN: %env_asan_opts=suppressions='"%t.supp"' %run %t
//
// RUN: %clangxx_asan -O2 %s -o %t
// RUN: not %run %t 2>&1 | FileCheck %s
// RUN: echo "interceptor_via_fun:bad_function" > %t.supp
// RUN: %env_asan_opts=suppressions='"%t.supp"' %run %t
// RUN: echo "interceptor_name:strncpy" > %t.supp
// RUN: %env_asan_opts=suppressions='"%t.supp"' %run %t
//
// RUN: %clangxx_asan -O3 %s -o %t
// RUN: not %run %t 2>&1 | FileCheck %s
// RUN: echo "interceptor_via_fun:bad_function" > %t.supp
// RUN: %env_asan_opts=suppressions='"%t.supp"' %run %t
// RUN: echo "interceptor_name:strncpy" > %t.supp
// RUN: %env_asan_opts=suppressions='"%t.supp"' %run %t
// UNSUPPORTED: android
#include <string.h>
// Don't inline function otherwise stacktrace changes.
__attribute__((noinline)) void bad_function() {
char buffer[] = "hello";
// CHECK: strncpy-param-overlap: memory ranges
// CHECK: [{{0x.*,[ ]*0x.*}}) and [{{0x.*,[ ]*0x.*}}) overlap
// CHECK: {{#0 0x.* in .*strncpy}}
// CHECK: {{#1 0x.* in bad_function.*strncpy-overlap.cpp:}}[[@LINE+2]]
// CHECK: {{#2 0x.* in main .*strncpy-overlap.cpp:}}[[@LINE+5]]
strncpy(buffer, buffer + 1, 5); // BOOM
}
int main(int argc, char **argv) {
bad_function();
return 0;
}