commit d6bdb6f9baa6e1f84cad3da8299f0ad1689dec87
author Florian Mayer <fmayer@google.com> Fri May 03 17:53:58 2019 +0100
committer Florian Mayer <fmayer@google.com> Fri May 03 17:53:58 2019 +0100
tree 6149b263f8d2326e7b2a8fcfb4e630dd5242d65f
parent ad7d5341ef84b3f0e2204d56482ef6f1cd5de9d6

Allow to block client on full buffer.

Bug: 130665360
Change-Id: I2f52dbb1a86664c81c8d21c68db79eed36a637fb

src/profiling/memory/wire_protocol.cc

diff --git a/src/profiling/memory/wire_protocol.cc b/src/profiling/memory/wire_protocol.cc
index 76b72d9..67b0f38 100644
--- a/src/profiling/memory/wire_protocol.cc
+++ b/src/profiling/memory/wire_protocol.cc
@@ -61,6 +61,7 @@
     iovecs[1].iov_len = sizeof(*msg.free_header);
   } else {
     PERFETTO_DFATAL("Neither alloc_header nor free_header set.");
+    errno = EINVAL;
     return false;
   }
 
@@ -83,6 +84,7 @@
     ScopedSpinlock lock = shmem->AcquireLock(ScopedSpinlock::Mode::Try);
     if (!lock.locked()) {
       PERFETTO_DLOG("Failed to acquire spinlock.");
+      errno = EAGAIN;
       return false;
     }
     buf = shmem->BeginWrite(lock, total_size);
@@ -90,6 +92,7 @@
   if (!buf) {
     PERFETTO_DFATAL("Buffer overflow.");
     shmem->EndWrite(std::move(buf));
+    errno = EAGAIN;
     return false;
   }