bump to modernc.org/sqlite v1.29.7 (#2850)

vendor/modernc.org/libc/pthread.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !(linux && (amd64 || loong64))
+
 package libc // import "modernc.org/libc"
 
 import (
@@ -37,6 +39,7 @@ type TLS struct {
 	errnop      uintptr
 	allocaStack [][]uintptr
 	allocas     []uintptr
+	jumpBuffers []uintptr
 	pthreadData
 	stack stackHeader
 
@@ -82,6 +85,29 @@ func (t *TLS) FreeAlloca() func() {
 	}
 }
 
+func (tls *TLS) PushJumpBuffer(jb uintptr) {
+	tls.jumpBuffers = append(tls.jumpBuffers, jb)
+}
+
+type LongjmpRetval int32
+
+func (tls *TLS) PopJumpBuffer(jb uintptr) {
+	n := len(tls.jumpBuffers)
+	if n == 0 || tls.jumpBuffers[n-1] != jb {
+		panic(todo("unsupported setjmp/longjmp usage"))
+	}
+
+	tls.jumpBuffers = tls.jumpBuffers[:n-1]
+}
+
+func (tls *TLS) Longjmp(jb uintptr, val int32) {
+	tls.PopJumpBuffer(jb)
+	if val == 0 {
+		val = 1
+	}
+	panic(LongjmpRetval(val))
+}
+
 func Xalloca(tls *TLS, size size_t) uintptr {
 	if __ccgo_strace {
 		trc("tls=%v size=%v, (%v:)", tls, size, origin(2))
@@ -420,6 +446,7 @@ func (m *mutex) lock(id int32) int32 {
 
 			m.Unlock()
 			m.wait.Lock()
+			// intentional empty section - wake up other waiters
 			m.wait.Unlock()
 		}
 	default: