diff options
Diffstat (limited to 'executor/executor.cc')
| -rw-r--r-- | executor/executor.cc | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/executor/executor.cc b/executor/executor.cc index ac54ce62e..bfda1cbd6 100644 --- a/executor/executor.cc +++ b/executor/executor.cc @@ -68,6 +68,7 @@ typedef unsigned char uint8; const int kMaxFd = 250; const int kMaxThreads = 32; const int kPreallocCoverThreads = 3; // the number of kcov instances to be set up during init +const int kReserveCoverFds = 16; // a compromise between extra fds and the likely neded kcov instances const int kInPipeFd = kMaxFd - 1; // remapped from stdin const int kOutPipeFd = kMaxFd - 2; // remapped from stdout const int kCoverFd = kOutPipeFd - kMaxThreads; @@ -470,10 +471,14 @@ int main(int argc, char** argv) if (flag_coverage) { for (int i = 0; i < kMaxThreads; i++) { threads[i].cov.fd = kCoverFd + i; - // Pre-setup coverage collection for some threads. This should be enough for almost - // all programs, for the remaning few ones coverage will be set up when it's needed. - if (i < kPreallocCoverThreads) + if (i < kPreallocCoverThreads) { + // Pre-setup coverage collection for some threads. This should be enough for almost + // all programs, for the remaning few ones coverage will be set up when it's needed. thread_setup_cover(&threads[i]); + } else if (i < kReserveCoverFds) { + // Ensure that these fds won't be taken during fuzzing or by init routines. + cover_reserve_fd(&threads[i].cov); + } } cover_open(&extra_cov, true); cover_protect(&extra_cov); |