diff options
Diffstat (limited to 'kernel/yosys.cc')
| -rw-r--r-- | kernel/yosys.cc | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/kernel/yosys.cc b/kernel/yosys.cc index 6cc643152..52bd066b7 100644 --- a/kernel/yosys.cc +++ b/kernel/yosys.cc @@ -55,6 +55,43 @@ RTLIL::Design *yosys_design = NULL; Tcl_Interp *yosys_tcl_interp = NULL; #endif +bool memhasher_active = false; +uint32_t memhasher_rng; +std::vector<void*> memhasher_store; + +void memhasher_on() +{ + memhasher_rng += time(NULL) << 16 ^ getpid(); + memhasher_store.resize(0x10000); + memhasher_active = true; +} + +void memhasher_off() +{ + for (auto p : memhasher_store) + if (p) free(p); + memhasher_store.clear(); + memhasher_active = false; +} + +void memhasher_do() +{ + memhasher_rng ^= memhasher_rng << 13; + memhasher_rng ^= memhasher_rng >> 17; + memhasher_rng ^= memhasher_rng << 5; + + int size, index = (memhasher_rng >> 4) & 0xffff; + switch (memhasher_rng & 7) { + case 0: size = 16; break; + case 1: size = 256; break; + case 2: size = 1024; break; + case 3: size = 4096; break; + default: size = 0; + } + if (index < 16) size *= 16; + memhasher_store[index] = realloc(memhasher_store[index], size); +} + std::string stringf(const char *fmt, ...) { std::string string; |