| 1 | /* Checks that BOLT correctly handles instrumentation shared libraries |
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| 2 | * with further optimization. |
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| 3 | */ |
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| 4 | #include <dlfcn.h> |
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| 5 | #include <stdio.h> |
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| 6 | |
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| 7 | #ifdef LIB |
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| 8 | int foo(int x) { return x + 1; } |
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| 9 | |
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| 10 | int fib(int x) { |
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| 11 | if (x < 2) |
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| 12 | return x; |
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| 13 | return fib(x - 1) + fib(x - 2); |
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| 14 | } |
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| 15 | |
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| 16 | int bar(int x) { return x - 1; } |
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| 17 | #endif |
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| 18 | |
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| 19 | #ifndef LIB |
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| 20 | int main(int argc, char **argv) { |
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| 21 | int (*fib_func)(int); |
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| 22 | char *libname; |
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| 23 | void *hndl; |
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| 24 | int val; |
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| 25 | if (argc < 2) |
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| 26 | return -1; |
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| 27 | /* |
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| 28 | * Expected library name as input to switch |
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| 29 | * between original and instrumented file |
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| 30 | */ |
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| 31 | libname = argv[1]; |
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| 32 | hndl = dlopen(file: libname, RTLD_LAZY); |
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| 33 | if (!hndl) { |
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| 34 | printf(format: "library load failed\n" ); |
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| 35 | return -1; |
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| 36 | } |
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| 37 | fib_func = dlsym(handle: hndl, name: "fib" ); |
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| 38 | if (!fib_func) { |
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| 39 | printf(format: "fib_func load failed\n" ); |
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| 40 | return -1; |
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| 41 | } |
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| 42 | val = fib_func(argc); |
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| 43 | dlclose(handle: hndl); |
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| 44 | printf(format: "fib(%d) = %d\n" , argc, val); |
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| 45 | return 0; |
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| 46 | } |
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| 47 | #endif |
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| 48 | |
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| 49 | /* |
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| 50 | REQUIRES: system-linux,bolt-runtime |
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| 51 | |
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| 52 | RUN: %clang %cflags %s -o %t.so -Wl,-q -fpie -fPIC -shared -DLIB |
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| 53 | RUN: %clang %cflags %s -o %t.exe -Wl,-q -ldl |
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| 54 | |
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| 55 | RUN: llvm-bolt %t.so --instrument --instrumentation-file=%t.so.fdata \ |
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| 56 | RUN: -o %t.so.instrumented |
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| 57 | |
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| 58 | # Program with instrumented shared library needs to finish returning zero |
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| 59 | RUN: %t.exe %t.so.instrumented 1 2 | FileCheck %s -check-prefix=CHECK-OUTPUT |
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| 60 | RUN: test -f %t.so.fdata |
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| 61 | |
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| 62 | # Test that the instrumented data makes sense |
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| 63 | RUN: llvm-bolt %t.so -o %t.so.bolted --data %t.so.fdata \ |
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| 64 | RUN: --reorder-blocks=ext-tsp --reorder-functions=hfsort+ |
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| 65 | |
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| 66 | RUN: %t.exe %t.so.bolted 1 2 | FileCheck %s -check-prefix=CHECK-OUTPUT |
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| 67 | |
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| 68 | CHECK-OUTPUT: fib(4) = 3 |
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| 69 | */ |
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| 70 | |
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