X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fbacktrace.c;h=90ae58d9838be4af7aba9475dd459e6e6ca91f1a;hb=fee931bde89778322557461356580752bc819cbf;hp=07af8fe5fdaf1de050add9b38333e27f1e0c7d38;hpb=fdccfb1135cb9eb89a094c83c443c71b5bb125e2;p=sbcl.git

diff --git a/src/runtime/backtrace.c b/src/runtime/backtrace.c
index 07af8fe..90ae58d 100644
--- a/src/runtime/backtrace.c
+++ b/src/runtime/backtrace.c
@@ -34,9 +34,11 @@
 #include "thread.h"
 
 #ifdef LISP_FEATURE_OS_PROVIDES_DLADDR
+# ifndef __USE_GNU
 /* __USE_GNU needed if we want dladdr() and Dl_Info from glibc. */
-#define __USE_GNU
-#include "dlfcn.h"
+# define __USE_GNU
+# endif
+# include "dlfcn.h"
 #endif
 
 #if !(defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
@@ -165,7 +167,7 @@ previous_info(struct call_info *info)
 {
     struct call_frame *this_frame;
     struct thread *thread=arch_os_get_current_thread();
-    int free;
+    int free_ici;
 
     if (!cs_valid_pointer_p(info->frame)) {
         printf("Bogus callee value (0x%08lx).\n", (unsigned long)info->frame);
@@ -182,10 +184,10 @@ previous_info(struct call_info *info)
 
     if (info->lra == NIL) {
         /* We were interrupted. Find the correct signal context. */
-        free = SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX,thread)>>2;
-        while (free-- > 0) {
+        free_ici = fixnum_value(SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX,thread));
+        while (free_ici-- > 0) {
             os_context_t *context =
-                thread->interrupt_contexts[free];
+                thread->interrupt_contexts[free_ici];
             if ((struct call_frame *)(unsigned long)
                     (*os_context_register_addr(context, reg_CFP))
                 == info->frame) {
@@ -284,15 +286,30 @@ backtrace(int nframes)
 #else
 
 static int
+altstack_pointer_p (void *p) {
+#ifndef LISP_FEATURE_WIN32
+    void* stack_start = arch_os_get_current_thread() + dynamic_values_bytes;
+    void* stack_end = stack_start + 32*SIGSTKSZ;
+
+    return (p > stack_start && p <= stack_end);
+#else
+    /* Win32 doesn't do altstack */
+    return 0;
+#endif
+}
+
+static int
 stack_pointer_p (void *p)
 {
   /* we are using sizeof(long) here, because that is the right value on both
    * x86 and x86-64.  (But note that false positives would not cause much harm
    * given the heuristical nature of x86_call_context.) */
   unsigned long stack_alignment = sizeof(long);
-  return (p < (void *) arch_os_get_current_thread()->control_stack_end
-          && p > (void *) &p
-          && (((unsigned long) p) & (stack_alignment-1)) == 0);
+
+  return (altstack_pointer_p(p)
+          || (p < (void *) arch_os_get_current_thread()->control_stack_end
+              && (p > (void *) &p || altstack_pointer_p(&p))
+              && (((unsigned long) p) & (stack_alignment-1)) == 0));
 }
 
 static int
@@ -391,7 +408,7 @@ debug_function_from_pc (struct code* code, void *pc)
     if (i == len)
       return ((struct compiled_debug_fun *) native_pointer(v->data[i - 1]));
 
-    if (offset >= fixnum_value(df->elsewhere_pc)) {
+    if (offset >= (unsigned long)fixnum_value(df->elsewhere_pc)) {
       struct compiled_debug_fun *p
         = ((struct compiled_debug_fun *) native_pointer(v->data[i + 1]));
       next_pc = fixnum_value(p->elsewhere_pc);
@@ -512,18 +529,40 @@ print_entry_points (struct code *code)
 }
 
 void
-backtrace(int nframes)
+describe_thread_state(void)
 {
-  void *fp;
-  int i;
-
-#if defined(LISP_FEATURE_X86)
-  asm("movl %%ebp,%0" : "=g" (fp));
-#elif defined (LISP_FEATURE_X86_64)
-  asm("movq %%rbp,%0" : "=g" (fp));
-#else
-#error "How did we get here?"
+    sigset_t mask;
+    struct thread *thread = arch_os_get_current_thread();
+#ifndef LISP_FEATURE_WIN32
+    thread_sigmask(SIG_SETMASK, NULL, &mask);
+    printf("Signal mask:\n");
+    printf(" SIGALRM = %d\n", sigismember(&mask, SIGALRM));
+    printf(" SIGINT = %d\n", sigismember(&mask, SIGINT));
+    printf(" SIGPROF = %d\n", sigismember(&mask, SIGPROF));
+#ifdef SIG_INTERRUPT_THREAD
+    printf(" SIG_INTERRUPT_THREAD = %d\n", sigismember(&mask, SIG_INTERRUPT_THREAD));
+#endif
+#ifdef SIG_STOP_FOR_GC
+    printf(" SIG_STOP_FOR_GC = %d\n", sigismember(&mask, SIG_STOP_FOR_GC));
+#endif
+#endif
+    printf("Specials:\n");
+    printf(" *GC-INHIBIT* = %s\n", (SymbolValue(GC_INHIBIT, thread) == T) ? "T" : "NIL");
+    printf(" *GC-PENDING* = %s\n", (SymbolValue(GC_PENDING, thread) == T) ? "T" : "NIL");
+    printf(" *INTERRUPTS-ENABLED* = %s\n", (SymbolValue(INTERRUPTS_ENABLED, thread) == T) ? "T" : "NIL");
+#ifdef STOP_FOR_GC_PENDING
+    printf(" *STOP-FOR-GC-PENDING* = %s\n", (SymbolValue(STOP_FOR_GC_PENDING, thread) == T) ? "T" : "NIL");
 #endif
+}
+
+/* This function has been split from backtrace() to enable Lisp
+ * backtraces from gdb with call backtrace_from_fp(...). Useful for
+ * example when debugging threading deadlocks.
+ */
+void
+backtrace_from_fp(void *fp, int nframes)
+{
+  int i;
 
   for (i = 0; i < nframes; ++i) {
     lispobj *p;
@@ -563,4 +602,20 @@ backtrace(int nframes)
   }
 }
 
+void
+backtrace(int nframes)
+{
+  void *fp;
+
+#if defined(LISP_FEATURE_X86)
+  asm("movl %%ebp,%0" : "=g" (fp));
+#elif defined (LISP_FEATURE_X86_64)
+  asm("movq %%rbp,%0" : "=g" (fp));
+#else
+#error "How did we get here?"
+#endif
+
+  backtrace_from_fp(fp, nframes);
+}
+
 #endif