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Patch WebKit because pthread_getattr_np is not implemented in uClibc
Define UCLIBC_USE_PROC_SELF_MAPS etc. as a workaround for uClibc. This
code was in the qtoipa webkit but appears to have been removed from
more recent versions of webkit.
See: http://bugreports.qt.nokia.com/browse/QTBUG-6551
Credit for fix: http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&p=545066#545066
Signed-off-by: Paul Jones <paul@pauljones.id.au>
Index: webkit-1.2.3/JavaScriptCore/runtime/Collector.cpp
===================================================================
--- webkit-1.2.3.orig/JavaScriptCore/runtime/Collector.cpp 2010-07-22 17:16:19.000000000 +0200
+++ webkit-1.2.3/JavaScriptCore/runtime/Collector.cpp 2010-07-22 17:25:02.000000000 +0200
@@ -75,6 +75,19 @@
#endif
#include <unistd.h>
+#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 <stdio_ext.h>
+extern int *__libc_stack_end;
+#endif
+#endif
+
#if OS(SOLARIS)
#include <thread.h>
#else
@@ -610,6 +622,36 @@
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
static void* stackBase = 0;
static size_t stackSize = 0;
static pthread_t stackThread;
@@ -631,6 +673,7 @@
stackThread = thread;
}
return static_cast<char*>(stackBase) + stackSize;
+#endif
#elif OS(WINCE)
if (g_stackBase)
return g_stackBase;
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