19990502 sourceware importbinu_ss_19990502

1 files changed, 116 insertions, 0 deletions

diff --git a/gprof/call_graph.c b/gprof/call_graph.c
new file mode 100644
index 0000000..8f12cbd
--- /dev/null
+++ b/gprof/call_graph.c
@@ -0,0 +1,116 @@
+#include "cg_arcs.h"
+#include "call_graph.h"
+#include "corefile.h"
+#include "gmon_io.h"
+#include "gmon_out.h"
+#include "symtab.h"
+#include "sym_ids.h"
+
+extern void
+DEFUN (cg_tally, (from_pc, self_pc, count),
+       bfd_vma from_pc AND bfd_vma self_pc AND unsigned long count)
+{
+  Sym *parent;
+  Sym *child;
+
+  parent = sym_lookup (&symtab, from_pc);
+  child = sym_lookup (&symtab, self_pc);
+
+  if (child == NULL || parent == NULL)
+    return;
+
+  /* If we're doing line-by-line profiling, both the parent and the
+     child will probably point to line symbols instead of function
+     symbols.  For the parent this is fine, since this identifies the
+     line number in the calling routing, but the child should always
+     point to a function entry point, so we back up in the symbol
+     table until we find it.
+   
+     For normal profiling, is_func will be set on all symbols, so this
+     code will do nothing.  */
+
+  while (child >= symtab.base && ! child->is_func)
+    --child;
+
+  if (child < symtab.base)
+    return;
+
+  /*
+   * Keep arc if it is on INCL_ARCS table or if the INCL_ARCS table
+   * is empty and it is not in the EXCL_ARCS table.
+   */
+  if (sym_id_arc_is_present (&syms[INCL_ARCS], parent, child)
+      || (syms[INCL_ARCS].len == 0
+	  && !sym_id_arc_is_present (&syms[EXCL_ARCS], parent, child)))
+    {
+      child->ncalls += count;
+      DBG (TALLYDEBUG,
+	   printf (_("[cg_tally] arc from %s to %s traversed %lu times\n"),
+		   parent->name, child->name, count));
+      arc_add (parent, child, count);
+    }
+}
+
+
+/*
+ * Read a record from file IFP describing an arc in the function
+ * call-graph and the count of how many times the arc has been
+ * traversed.  FILENAME is the name of file IFP and is provided
+ * for formatting error-messages only.
+ */
+void
+DEFUN (cg_read_rec, (ifp, filename), FILE * ifp AND CONST char *filename)
+{
+  bfd_vma from_pc, self_pc;
+  struct gmon_cg_arc_record arc;
+  unsigned long count;
+
+  if (fread (&arc, sizeof (arc), 1, ifp) != 1)
+    {
+      fprintf (stderr, _("%s: %s: unexpected end of file\n"),
+	       whoami, filename);
+      done (1);
+    }
+  from_pc = get_vma (core_bfd, (bfd_byte *) arc.from_pc);
+  self_pc = get_vma (core_bfd, (bfd_byte *) arc.self_pc);
+  count = bfd_get_32 (core_bfd, (bfd_byte *) arc.count);
+  DBG (SAMPLEDEBUG,
+       printf ("[cg_read_rec] frompc 0x%lx selfpc 0x%lx count %lu\n",
+	       from_pc, self_pc, count));
+  /* add this arc: */
+  cg_tally (from_pc, self_pc, count);
+}
+
+
+/*
+ * Write all the arcs in the call-graph to file OFP.  FILENAME is
+ * the name of OFP and is provided for formatting error-messages
+ * only.
+ */
+void
+DEFUN (cg_write_arcs, (ofp, filename), FILE * ofp AND const char *filename)
+{
+  const unsigned char tag = GMON_TAG_CG_ARC;
+  struct gmon_cg_arc_record raw_arc;
+  Arc *arc;
+  Sym *sym;
+
+  for (sym = symtab.base; sym < symtab.limit; sym++)
+    {
+      for (arc = sym->cg.children; arc; arc = arc->next_child)
+	{
+	  put_vma (core_bfd, arc->parent->addr, (bfd_byte *) raw_arc.from_pc);
+	  put_vma (core_bfd, arc->child->addr, (bfd_byte *) raw_arc.self_pc);
+	  bfd_put_32 (core_bfd, arc->count, (bfd_byte *) raw_arc.count);
+	  if (fwrite (&tag, sizeof (tag), 1, ofp) != 1
+	      || fwrite (&raw_arc, sizeof (raw_arc), 1, ofp) != 1)
+	    {
+	      perror (filename);
+	      done (1);
+	    }
+	  DBG (SAMPLEDEBUG,
+	     printf ("[cg_write_arcs] frompc 0x%lx selfpc 0x%lx count %lu\n",
+		     arc->parent->addr, arc->child->addr, arc->count));
+	}
+    }
+}