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/* Checks that BOLT correctly handles instrumentation shared libraries
* with further optimization.
*/
#include <dlfcn.h>
#include <stdio.h>
#ifdef LIB
int foo(int x) { return x + 1; }
int fib(int x) {
if (x < 2)
return x;
return fib(x - 1) + fib(x - 2);
}
int bar(int x) { return x - 1; }
#endif
#ifndef LIB
int main(int argc, char **argv) {
int (*fib_func)(int);
char *libname;
void *hndl;
int val;
if (argc < 2)
return -1;
/*
* Expected library name as input to switch
* between original and instrumented file
*/
libname = argv[1];
hndl = dlopen(libname, RTLD_LAZY);
if (!hndl) {
printf("library load failed\n");
return -1;
}
fib_func = dlsym(hndl, "fib");
if (!fib_func) {
printf("fib_func load failed\n");
return -1;
}
val = fib_func(argc);
dlclose(hndl);
printf("fib(%d) = %d\n", argc, val);
return 0;
}
#endif
/*
REQUIRES: system-linux,bolt-runtime
RUN: %clang %cflags %s -o %t.so -Wl,-q -fpie -fPIC -shared -DLIB
RUN: %clang %cflags %s -o %t.exe -Wl,-q -ldl
RUN: llvm-bolt %t.so --instrument --instrumentation-file=%t.so.fdata \
RUN: -o %t.so.instrumented
# Program with instrumented shared library needs to finish returning zero
RUN: %t.exe %t.so.instrumented 1 2 | FileCheck %s -check-prefix=CHECK-OUTPUT
RUN: test -f %t.so.fdata
# Test that the instrumented data makes sense
RUN: llvm-bolt %t.so -o %t.so.bolted --data %t.so.fdata \
RUN: --reorder-blocks=ext-tsp --reorder-functions=hfsort+
RUN: %t.exe %t.so.bolted 1 2 | FileCheck %s -check-prefix=CHECK-OUTPUT
CHECK-OUTPUT: fib(4) = 3
*/
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