From f29d569cd33a73da5ad675f43a34ad53c5cc9bc6 Mon Sep 17 00:00:00 2001
From: davidovski <david@davidovski.xyz>
Date: Thu, 2 Feb 2023 14:10:02 +0000
Subject: Work

---
 skip/qt5-qtwebengine/qt-musl-tid-caching.patch | 81 ++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 skip/qt5-qtwebengine/qt-musl-tid-caching.patch

(limited to 'skip/qt5-qtwebengine/qt-musl-tid-caching.patch')

diff --git a/skip/qt5-qtwebengine/qt-musl-tid-caching.patch b/skip/qt5-qtwebengine/qt-musl-tid-caching.patch
new file mode 100644
index 0000000..acbee25
--- /dev/null
+++ b/skip/qt5-qtwebengine/qt-musl-tid-caching.patch
@@ -0,0 +1,81 @@
+--- ./src/3rdparty/chromium/sandbox/linux/services/namespace_sandbox.cc.orig
++++ ./src/3rdparty/chromium/sandbox/linux/services/namespace_sandbox.cc
+@@ -209,6 +209,70 @@
+   return base::LaunchProcess(argv, launch_options_copy);
+ }
+ 
++#if defined(__aarch64__) || defined(__arm__)
++#define TLS_ABOVE_TP
++#endif
++
++struct musl_pthread
++{
++  /* Part 1 -- these fields may be external or
++  * internal (accessed via asm) ABI. Do not change. */
++  struct pthread *self;
++#ifndef TLS_ABOVE_TP
++  uintptr_t *dtv;
++#endif
++  struct pthread *prev, *next; /* non-ABI */
++  uintptr_t sysinfo;
++#ifndef TLS_ABOVE_TP
++#ifdef CANARY_PAD
++  uintptr_t canary_pad;
++#endif
++  uintptr_t canary;
++#endif
++
++/* Part 2 -- implementation details, non-ABI. */
++  int tid;
++  int errno_val;
++  volatile int detach_state;
++  volatile int cancel;
++  volatile unsigned char canceldisable, cancelasync;
++  unsigned char tsd_used:1;
++  unsigned char dlerror_flag:1;
++  unsigned char *map_base;
++  size_t map_size;
++  void *stack;
++  size_t stack_size;
++  size_t guard_size;
++  void *result;
++  struct __ptcb *cancelbuf;
++  void **tsd;
++  struct {
++    volatile void *volatile head;
++    long off;
++    volatile void *volatile pending;
++  } robust_list;
++  int h_errno_val;
++  volatile int timer_id;
++  locale_t locale;
++  volatile int killlock[1];
++  char *dlerror_buf;
++  void *stdio_locks;
++
++  /* Part 3 -- the positions of these fields relative to
++  * the end of the structure is external and internal ABI. */
++#ifdef TLS_ABOVE_TP
++  uintptr_t canary;
++  uintptr_t *dtv;
++#endif
++};
++
++void MaybeUpdateMuslTidCache()
++{
++  pid_t real_tid = sys_gettid();
++  pid_t* cached_tid_location = &reinterpret_cast<struct musl_pthread*>(pthread_self())->tid;
++  *cached_tid_location = real_tid;
++}
++
+ // static
+ pid_t NamespaceSandbox::ForkInNewPidNamespace(bool drop_capabilities_in_child) {
+   const pid_t pid =
+@@ -226,6 +290,7 @@
+ #if defined(LIBC_GLIBC)
+     MaybeUpdateGlibcTidCache();
+ #endif
++    MaybeUpdateMuslTidCache();
+     return 0;
+   }
+ 
-- 
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