1 files changed, 65 insertions, 0 deletions
diff --git a/www/chromium/files/patch-base_profiler_stack__copier__signal.cc b/www/chromium/files/patch-base_profiler_stack__copier__signal.cc
new file mode 100644
index 000000000000..6a2ff859b823
--- /dev/null
+++ b/www/chromium/files/patch-base_profiler_stack__copier__signal.cc
@@ -0,0 +1,65 @@
+--- base/profiler/stack_copier_signal.cc.orig	2020-03-03 18:53:47 UTC
++++ base/profiler/stack_copier_signal.cc
+@@ -4,10 +4,16 @@
+ 
+ #include "base/profiler/stack_copier_signal.h"
+ 
++#if defined(OS_LINUX)
+ #include <linux/futex.h>
++#include <syscall.h>
++#elif defined(OS_FREEBSD)
++#include <sys/types.h>
++#include <sys/thr.h>
++#include <sys/umtx.h>
++#endif
+ #include <signal.h>
+ #include <sys/ucontext.h>
+-#include <syscall.h>
+ 
+ #include <atomic>
+ 
+@@ -35,8 +41,13 @@ class AsyncSafeWaitableEvent {
+     // for a pthread mutex. So, also check the condition.
+     while (true) {
+       int res =
++#if defined(OS_LINUX)
+           syscall(SYS_futex, futex_int_ptr(), FUTEX_WAIT | FUTEX_PRIVATE_FLAG,
+                   0, nullptr, nullptr, 0);
++#elif defined(OS_FREEBSD)
++          _umtx_op(futex_int_ptr(), UMTX_OP_WAIT_UINT_PRIVATE, 0, nullptr,
++                   nullptr);
++#endif
+       if (futex_.load(std::memory_order_acquire) != 0)
+         return true;
+       if (res != 0)
+@@ -46,8 +57,12 @@ class AsyncSafeWaitableEvent {
+ 
+   void Signal() {
+     futex_.store(1, std::memory_order_release);
++#if defined(OS_LINUX)
+     syscall(SYS_futex, futex_int_ptr(), FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1,
+             nullptr, nullptr, 0);
++#elif defined(OS_FREEBSD)
++    _umtx_op(futex_int_ptr(), UMTX_OP_WAKE_PRIVATE, 1, nullptr, nullptr);
++#endif
+   }
+ 
+  private:
+@@ -201,11 +216,17 @@ bool StackCopierSignal::CopyStack(StackBuffer* stack_b
+     if (!scoped_sigaction.succeeded())
+       return false;
+ 
++#if defined(OS_LINUX)
+     if (syscall(SYS_tgkill, getpid(), thread_delegate_->GetThreadId(),
+                 SIGURG) != 0) {
+       NOTREACHED();
+       return false;
+     }
++#elif defined(OS_FREEBSD)
++    if (thr_kill2(getpid(), thread_delegate_->GetThreadId(), SIGURG) != 0) {
++      return false;
++    }
++#endif
+     bool finished_waiting = wait_event.Wait();
+     TRACE_EVENT_END0(TRACE_DISABLED_BY_DEFAULT("cpu_profiler.debug"),
+                      "StackCopierSignal copy stack");