1 // This header is included in all the test programs (C and C++) and provides a
2 // hook for dealing with platform-specifics.
3 #if defined(_WIN32) || defined(_WIN64)
4 #ifdef COMPILING_LLDB_TEST_DLL
5 #define LLDB_TEST_API __declspec(dllexport)
6 #else
7 #define LLDB_TEST_API __declspec(dllimport)
8 #endif
9 #else
10 #define LLDB_TEST_API
11 #endif
12 
13 #if defined(__cplusplus) && defined(_MSC_VER) && (_HAS_EXCEPTIONS == 0)
14 // Compiling MSVC libraries with _HAS_EXCEPTIONS=0, eliminates most but not all
15 // calls to __uncaught_exception.  Unfortunately, it does seem to eliminate
16 // the delcaration of __uncaught_excpeiton.  Including <eh.h> ensures that it is
17 // declared.  This may not be necessary after MSVC 12.
18 #include <eh.h>
19 #endif
20 
21 #if defined(_WIN32)
22 #define LLVM_PRETTY_FUNCTION __FUNCSIG__
23 #else
24 #define LLVM_PRETTY_FUNCTION LLVM_PRETTY_FUNCTION
25 #endif
26 
27 
28 // On some systems (e.g., some versions of linux) it is not possible to attach to a process
29 // without it giving us special permissions. This defines the lldb_enable_attach macro, which
30 // should perform any such actions, if needed by the platform. This is a macro instead of a
31 // function to avoid the need for complex linking of the test programs.
32 #if defined(__linux__)
33 #include <sys/prctl.h>
34 
35 // Android API <= 16 does not have these defined.
36 #ifndef PR_SET_PTRACER
37 #define PR_SET_PTRACER 0x59616d61
38 #endif
39 #ifndef PR_SET_PTRACER_ANY
40 #define PR_SET_PTRACER_ANY ((unsigned long)-1)
41 #endif
42 
43 // For now we execute on best effort basis.  If this fails for some reason, so be it.
44 #define lldb_enable_attach()                                                          \
45     do                                                                                \
46     {                                                                                 \
47         const int prctl_result = prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0);  \
48         (void)prctl_result;                                                           \
49     } while (0)
50 
51 #else // not linux
52 
53 #define lldb_enable_attach()
54 
55 #endif
56 
57 #if defined(__APPLE__) && defined(LLDB_USING_LIBSTDCPP)
58 
59 // on Darwin, libstdc++ is missing <atomic>, so this would cause any test to fail building
60 // since this header file is being included in every C-family test case, we need to not include it
61 // on Darwin, most tests use libc++ by default, so this will only affect tests that explicitly require libstdc++
62 
63 #else
64 #ifdef __cplusplus
65 #include <atomic>
66 
67 // Note that although hogging the CPU while waiting for a variable to change
68 // would be terrible in production code, it's great for testing since it
69 // avoids a lot of messy context switching to get multiple threads synchronized.
70 
71 typedef std::atomic<int> pseudo_barrier_t;
72 #define pseudo_barrier_wait(barrier)        \
73     do                                      \
74     {                                       \
75         --(barrier);                        \
76         while ((barrier).load() > 0)        \
77             ;                               \
78     } while (0)
79 
80 #define pseudo_barrier_init(barrier, count) \
81     do                                      \
82     {                                       \
83         (barrier) = (count);                \
84     } while (0)
85 #endif // __cplusplus
86 #endif // defined(__APPLE__) && defined(LLDB_USING_LIBSTDCPP)
87