Merge pull request #2832 from razzfazz/handle_eintr

[mono.git] / mono / utils / mach-support-amd64.c

diff --git a/mono/utils/mach-support-amd64.c b/mono/utils/mach-support-amd64.c
index 19040885da612aaf9908a3dedec6831aab1b491e..1802ff79f5364d8301566717bc2da54b5bcad12d 100644 (file)
--- a/mono/utils/mach-support-amd64.c
+++ b/mono/utils/mach-support-amd64.c
@@ -18,11 +18,21 @@
 #include "utils/mono-sigcontext.h"
 #include "mach-support.h"
 
+//For reg numbers
+#include <mono/arch/amd64/amd64-codegen.h>
+
 /* Known offsets used for TLS storage*/
 
 /* All OSX versions up to 10.8 */
 #define TLS_VECTOR_OFFSET_CATS 0x60
 #define TLS_VECTOR_OFFSET_10_9 0xe0
+#define TLS_VECTOR_OFFSET_10_11 0x100
+
+/* This is 2 slots less than the known low */
+#define TLS_PROBE_LOW_WATERMARK 0x50
+/* This is 28 slots above the know high, which is more than the known high-low*/
+#define TLS_PROBE_HIGH_WATERMARK 0x200
+
 
 static int tls_vector_offset;
 
@@ -66,6 +76,28 @@ mono_mach_arch_mcontext_to_thread_state (void *context, thread_state_t state)
        *arch_state = ctx->__ss;
 }
 
+void
+mono_mach_arch_thread_state_to_mono_context (thread_state_t state, MonoContext *context)
+{
+       x86_thread_state64_t *arch_state = (x86_thread_state64_t *) state;
+       context->gregs [AMD64_RAX] = arch_state->__rax;
+       context->gregs [AMD64_RBX] = arch_state->__rbx;
+       context->gregs [AMD64_RCX] = arch_state->__rcx;
+       context->gregs [AMD64_RDX] = arch_state->__rdx;
+       context->gregs [AMD64_RDI] = arch_state->__rdi;
+       context->gregs [AMD64_RBP] = arch_state->__rbp;
+       context->gregs [AMD64_RSP] = arch_state->__rsp;
+       context->gregs [AMD64_R8] = arch_state->__r8;
+       context->gregs [AMD64_R9] = arch_state->__r9;
+       context->gregs [AMD64_R10] = arch_state->__r10;
+       context->gregs [AMD64_R11] = arch_state->__r11;
+       context->gregs [AMD64_R12] = arch_state->__r12;
+       context->gregs [AMD64_R13] = arch_state->__r13;
+       context->gregs [AMD64_R14] = arch_state->__r14;
+       context->gregs [AMD64_R15] = arch_state->__r15;
+       context->gregs [AMD64_RIP] = arch_state->__rip;
+}
+
 int
 mono_mach_arch_get_thread_state_size ()
 {
@@ -100,6 +132,7 @@ mono_mach_get_tls_address_from_thread (pthread_t thread, pthread_key_t key)
         */
        intptr_t *p = (intptr_t *)thread;
        intptr_t **tsd = (intptr_t **) ((char*)p + tls_vector_offset);
+       g_assert (tls_vector_offset != -1);
 
        return (void *) &tsd [key];
 }
@@ -113,6 +146,7 @@ mono_mach_arch_get_tls_value_from_thread (pthread_t thread, guint32 key)
 void
 mono_mach_init (pthread_key_t key)
 {
+       int i;
        void *old_value = pthread_getspecific (key);
        void *canary = (void*)0xDEADBEEFu;
 
@@ -130,7 +164,21 @@ mono_mach_init (pthread_key_t key)
        if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary)
                goto ok;
 
-       g_error ("could not discover the mach TLS offset");
+       tls_vector_offset = TLS_VECTOR_OFFSET_10_11;
+       if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary)
+               goto ok;
+
+       /*Fallback to scanning a large range of offsets*/
+       for (i = TLS_PROBE_LOW_WATERMARK; i <= TLS_PROBE_HIGH_WATERMARK; i += 4) {
+               tls_vector_offset = i;
+               if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary) {
+                       g_warning ("Found new TLS offset at %d", i);
+                       goto ok;
+               }
+       }
+
+       tls_vector_offset = -1;
+       g_warning ("could not discover the mach TLS offset");
 ok:
        pthread_setspecific (key, old_value);
 }