Reviewers: Vitaly,
Description:
Investigate usleep failure on Linux. Add more debug output.
BUG=crbug.com/54592
TEST=none
Please review this at http://codereview.chromium.org/4391001/show
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/platform-linux.cc
Index: src/platform-linux.cc
diff --git a/src/platform-linux.cc b/src/platform-linux.cc
index
ef4ca163c894df33bf03b04c30b22240f1346c1e..89003ba83f912fa178d5dfc949188051d3ec01c6
100644
--- a/src/platform-linux.cc
+++ b/src/platform-linux.cc
@@ -828,8 +828,17 @@ class Sampler::PlatformData : public Malloced {
syscall(SYS_tgkill, vm_tgid_, vm_tid_, SIGPROF);
// Convert ms to us and subtract 100 us to compensate delays
// occuring during signal delivery.
- int result = usleep(sampler_->interval_ * 1000 - 100);
- ASSERT(result == 0 || errno == EINTR);
+ const useconds_t interval = sampler_->interval_ * 1000 - 100;
+ int result = usleep(interval);
+#ifdef DEBUG
+ if (result != 0 && errno != EINTR) {
+ fprintf(stderr,
+ "SignalSender usleep error; interval = %u, errno = %d\n",
+ interval,
+ errno);
+ ASSERT(result == 0 || errno == EINTR);
+ }
+#endif
USE(result);
}
}
@@ -862,6 +871,7 @@ Sampler::Sampler(int interval, bool profiling)
Sampler::~Sampler() {
+ ASSERT(!data_->signal_sender_launched_);
delete data_;
}
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