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--- base/profiler/stack_base_address_posix.cc.orig 2025-04-22 20:15:27 UTC
+++ base/profiler/stack_base_address_posix.cc
@@ -18,6 +18,10 @@
#include "base/files/scoped_file.h"
#endif
+#if BUILDFLAG(IS_BSD)
+#include <pthread_np.h>
+#endif
+
#if BUILDFLAG(IS_CHROMEOS)
extern "C" void* __libc_stack_end;
#endif
@@ -49,7 +53,21 @@ uintptr_t GetThreadStackBaseAddressImpl(pthread_t pthr
#if !BUILDFLAG(IS_LINUX)
uintptr_t GetThreadStackBaseAddressImpl(pthread_t pthread_id) {
+#if BUILDFLAG(IS_OPENBSD)
+ stack_t ss;
+ void *address;
+ size_t size;
+ if (pthread_stackseg_np(pthread_id, &ss) != 0)
+ return 0;
+ size = ss.ss_size;
+ address = (void*)((size_t) ss.ss_sp - ss.ss_size);
+#else
pthread_attr_t attr;
+#if BUILDFLAG(IS_FREEBSD)
+ int result;
+ pthread_attr_init(&attr);
+ pthread_attr_get_np(pthread_id, &attr);
+#else
// pthread_getattr_np will crash on ChromeOS & Linux if we are in the sandbox
// and pthread_id refers to a different thread, due to the use of
// sched_getaffinity().
@@ -62,12 +80,14 @@ uintptr_t GetThreadStackBaseAddressImpl(pthread_t pthr
<< logging::SystemErrorCodeToString(result);
// See crbug.com/617730 for limitations of this approach on Linux-like
// systems.
+#endif
void* address;
size_t size;
result = pthread_attr_getstack(&attr, &address, &size);
CHECK_EQ(result, 0) << "pthread_attr_getstack returned "
<< logging::SystemErrorCodeToString(result);
pthread_attr_destroy(&attr);
+#endif
const uintptr_t base_address = reinterpret_cast<uintptr_t>(address) + size;
return base_address;
}
@@ -84,7 +104,7 @@ std::optional<uintptr_t> GetThreadStackBaseAddress(Pla
// trying to work around the problem.
return std::nullopt;
#else
- const bool is_main_thread = id.raw() == GetCurrentProcId();
+ const bool is_main_thread = id.raw() == (checked_cast<uint64_t>(GetCurrentProcId()));
if (is_main_thread) {
#if BUILDFLAG(IS_ANDROID)
// The implementation of pthread_getattr_np() in Bionic reads proc/self/maps
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