Add pthred_getattr_np / phread_attr_getstrack alternatives for uClibc Based on https://dev.openwrt.org/log/packages/Xorg/lib/qt4/patches/100-fix-webkit-for-uclibc.patch?rev=20371 Signed-off-by: Johan Sagaert --- qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.cpp 2010-02-11 16:55:20.000000000 +0100 +++ qt-everywhere-opensource-src-4.6.2JS/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Collector.cpp 2010-05-23 10:49:29.000000000 +0200 @@ -75,6 +75,23 @@ #endif #include +#if defined(QT_LINUXBASE) +#include +#endif + +#if defined(__UCLIBC__) +// versions of uClibc 0.9.32 and below with linuxthreads.old do not have +// pthread_getattr_np or pthread_attr_getstack. +#if __UCLIBC_MAJOR__ == 0 && \ + (__UCLIBC_MINOR__ < 9 || \ + (__UCLIBC_MINOR__ == 9 && __UCLIBC_SUBLEVEL__ <= 32)) && \ + defined(__LINUXTHREADS_OLD__) +#define UCLIBC_USE_PROC_SELF_MAPS 1 +#include +extern int *__libc_stack_end; +#endif +#endif + #if OS(SOLARIS) #include #else @@ -667,18 +683,61 @@ static inline void* currentThreadStackBa get_thread_info(find_thread(NULL), &threadInfo); return threadInfo.stack_end; #elif OS(UNIX) +#ifdef UCLIBC_USE_PROC_SELF_MAPS + // Read /proc/self/maps and locate the line whose address + // range contains __libc_stack_end. + FILE *file = fopen("/proc/self/maps", "r"); + if (!file) + return 0; + __fsetlocking(file, FSETLOCKING_BYCALLER); + char *line = NULL; + size_t lineLen = 0; + while (!feof_unlocked(file)) { + if (getdelim(&line, &lineLen, '\n', file) <= 0) + break; + + long from; + long to; + if (sscanf (line, "%lx-%lx", &from, &to) != 2) + continue; + if (from <= (long)__libc_stack_end && (long)__libc_stack_end < to) { + fclose(file); + free(line); +#ifdef _STACK_GROWS_UP + return (void *)from; +#else + return (void *)to; +#endif + } + } + fclose(file); + free(line); + return 0; +#else AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex); MutexLocker locker(mutex); static void* stackBase = 0; static size_t stackSize = 0; static pthread_t stackThread; pthread_t thread = pthread_self(); if (stackBase == 0 || thread != stackThread) { + +#if defined(QT_LINUXBASE) + // LinuxBase is missing pthread_getattr_np - resolve it once at runtime instead + // see http://bugs.linuxbase.org/show_bug.cgi?id=2364 + typedef int (*GetAttrPtr)(pthread_t, pthread_attr_t *); + static int (*pthread_getattr_np_ptr)(pthread_t, pthread_attr_t *) = 0; + if (!pthread_getattr_np_ptr) + *(void **)&pthread_getattr_np_ptr = dlsym(RTLD_DEFAULT, "pthread_getattr_np"); +#endif pthread_attr_t sattr; pthread_attr_init(&sattr); #if HAVE(PTHREAD_NP_H) || OS(NETBSD) // e.g. on FreeBSD 5.4, neundorf@kde.org pthread_attr_get_np(thread, &sattr); +#elif defined(QT_LINUXBASE) + if (pthread_getattr_np_ptr) + pthread_getattr_np_ptr(thread, &sattr); #else // FIXME: this function is non-portable; other POSIX systems may have different np alternatives pthread_getattr_np(thread, &sattr); @@ -690,6 +749,7 @@ static inline void* currentThreadStackBa stackThread = thread; } return static_cast(stackBase) + stackSize; +#endif #elif OS(WINCE) AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex); MutexLocker locker(mutex);