| 34 | #endif |
| 35 | |
| 36 | static void *GetFuncAddr(const char *name, uptr wrapper_addr) { |
| 37 | #if SANITIZER_NETBSD |
| 38 | // FIXME: Find a better way to handle renames |
| 39 | if (StrCmp(name, "sigaction")) |
| 40 | name = "__sigaction14"; |
| 41 | #endif |
| 42 | void *addr = dlsym(RTLD_NEXT, name); |
| 43 | if (!addr) { |
| 44 | // If the lookup using RTLD_NEXT failed, the sanitizer runtime library is |
| 45 | // later in the library search order than the DSO that we are trying to |
| 46 | // intercept, which means that we cannot intercept this function. We still |
| 47 | // want the address of the real definition, though, so look it up using |
| 48 | // RTLD_DEFAULT. |
| 49 | addr = dlsym(RTLD_DEFAULT, name); |
| 50 | |
| 51 | // In case `name' is not loaded, dlsym ends up finding the actual wrapper. |
| 52 | // We don't want to intercept the wrapper and have it point to itself. |
| 53 | if ((uptr)addr == wrapper_addr) |
| 54 | addr = nullptr; |
| 55 | } |
| 56 | return addr; |
| 57 | } |
| 58 | |
| 59 | bool InterceptFunction(const char *name, uptr *ptr_to_real, uptr func, |
| 60 | uptr wrapper) { |
no test coverage detected