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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
tree1af963bfd8d3e55167b81def4207f175eaff3a56 /gprof/gmon_io.c
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19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'gprof/gmon_io.c')
-rw-r--r--gprof/gmon_io.c454
1 files changed, 454 insertions, 0 deletions
diff --git a/gprof/gmon_io.c b/gprof/gmon_io.c
new file mode 100644
index 0000000..ff294f5
--- /dev/null
+++ b/gprof/gmon_io.c
@@ -0,0 +1,454 @@
+/*
+ * Input and output from/to gmon.out files.
+ */
+#include "cg_arcs.h"
+#include "basic_blocks.h"
+#include "bfd.h"
+#include "corefile.h"
+#include "call_graph.h"
+#include "gmon_io.h"
+#include "gmon_out.h"
+#include "gmon.h" /* fetch header for old format */
+#include "gprof.h"
+#include "hertz.h"
+#include "hist.h"
+#include "libiberty.h"
+
+int gmon_input = 0;
+int gmon_file_version = 0; /* 0 == old (non-versioned) file format */
+
+/*
+ * This probably ought to be in libbfd.
+ */
+bfd_vma
+DEFUN (get_vma, (abfd, addr), bfd * abfd AND bfd_byte * addr)
+{
+ switch (sizeof (char*))
+ {
+ case 4:
+ return bfd_get_32 (abfd, addr);
+ case 8:
+ return bfd_get_64 (abfd, addr);
+ default:
+ fprintf (stderr, _("%s: bfd_vma has unexpected size of %ld bytes\n"),
+ whoami, (long) sizeof (char*));
+ done (1);
+ }
+}
+
+
+/*
+ * This probably ought to be in libbfd.
+ */
+void
+DEFUN (put_vma, (abfd, val, addr), bfd * abfd AND bfd_vma val AND bfd_byte * addr)
+{
+ switch (sizeof (char*))
+ {
+ case 4:
+ bfd_put_32 (abfd, val, addr);
+ break;
+ case 8:
+ bfd_put_64 (abfd, val, addr);
+ break;
+ default:
+ fprintf (stderr, _("%s: bfd_vma has unexpected size of %ld bytes\n"),
+ whoami, (long) sizeof (char*));
+ done (1);
+ }
+}
+
+
+void
+DEFUN (gmon_out_read, (filename), const char *filename)
+{
+ FILE *ifp;
+ struct gmon_hdr ghdr;
+ unsigned char tag;
+ int nhist = 0, narcs = 0, nbbs = 0;
+
+ /* open gmon.out file: */
+
+ if (strcmp (filename, "-") == 0)
+ {
+ ifp = stdin;
+ }
+ else
+ {
+ ifp = fopen (filename, FOPEN_RB);
+ if (!ifp)
+ {
+ perror (filename);
+ done (1);
+ }
+ }
+ if (fread (&ghdr, sizeof (struct gmon_hdr), 1, ifp) != 1)
+ {
+ fprintf (stderr, _("%s: file too short to be a gmon file\n"),
+ filename);
+ done (1);
+ }
+
+ if ((file_format == FF_MAGIC) ||
+ (file_format == FF_AUTO && !strncmp (&ghdr.cookie[0], GMON_MAGIC, 4)))
+ {
+ if (file_format == FF_MAGIC && strncmp (&ghdr.cookie[0], GMON_MAGIC, 4))
+ {
+ fprintf (stderr, _("%s: file `%s' has bad magic cookie\n"),
+ whoami, filename);
+ done (1);
+ }
+
+ /* right magic, so it's probably really a new gmon.out file */
+
+ gmon_file_version = bfd_get_32 (core_bfd, (bfd_byte *) ghdr.version);
+ if (gmon_file_version != GMON_VERSION && gmon_file_version != 0)
+ {
+ fprintf (stderr,
+ _("%s: file `%s' has unsupported version %d\n"),
+ whoami, filename, gmon_file_version);
+ done (1);
+ }
+
+ /* read in all the records: */
+ while (fread (&tag, sizeof (tag), 1, ifp) == 1)
+ {
+ switch (tag)
+ {
+ case GMON_TAG_TIME_HIST:
+ ++nhist;
+ gmon_input |= INPUT_HISTOGRAM;
+ hist_read_rec (ifp, filename);
+ break;
+
+ case GMON_TAG_CG_ARC:
+ ++narcs;
+ gmon_input |= INPUT_CALL_GRAPH;
+ cg_read_rec (ifp, filename);
+ break;
+
+ case GMON_TAG_BB_COUNT:
+ ++nbbs;
+ gmon_input |= INPUT_BB_COUNTS;
+ bb_read_rec (ifp, filename);
+ break;
+
+ default:
+ fprintf (stderr,
+ _("%s: %s: found bad tag %d (file corrupted?)\n"),
+ whoami, filename, tag);
+ done (1);
+ }
+ }
+ }
+ else if (file_format == FF_AUTO
+ || file_format == FF_BSD
+ || file_format == FF_BSD44)
+ {
+ struct hdr
+ {
+ bfd_vma low_pc;
+ bfd_vma high_pc;
+ int ncnt;
+ };
+ int i, samp_bytes, header_size;
+ unsigned long count;
+ bfd_vma from_pc, self_pc;
+ struct raw_arc raw_arc;
+ struct raw_phdr raw;
+ static struct hdr h;
+ UNIT raw_bin_count;
+ struct hdr tmp;
+
+ /*
+ * Information from a gmon.out file is in two parts: an array of
+ * sampling hits within pc ranges, and the arcs.
+ */
+ gmon_input = INPUT_HISTOGRAM | INPUT_CALL_GRAPH;
+
+ /*
+ * This fseek() ought to work even on stdin as long as it's
+ * not an interactive device (heck, is there anybody who would
+ * want to type in a gmon.out at the terminal?).
+ */
+ if (fseek (ifp, 0, SEEK_SET) < 0)
+ {
+ perror (filename);
+ done (1);
+ }
+ if (fread (&raw, 1, sizeof (struct raw_phdr), ifp)
+ != sizeof (struct raw_phdr))
+ {
+ fprintf (stderr, _("%s: file too short to be a gmon file\n"),
+ filename);
+ done (1);
+ }
+ tmp.low_pc = get_vma (core_bfd, (bfd_byte *) &raw.low_pc[0]);
+ tmp.high_pc = get_vma (core_bfd, (bfd_byte *) &raw.high_pc[0]);
+ tmp.ncnt = bfd_get_32 (core_bfd, (bfd_byte *) &raw.ncnt[0]);
+
+ if (bfd_get_32 (core_bfd, (bfd_byte *) &raw.version[0])
+ == GMONVERSION)
+ {
+ int profrate;
+
+ /* 4.4BSD format header. */
+
+ profrate = bfd_get_32 (core_bfd, (bfd_byte *) &raw.profrate[0]);
+ if (!s_highpc)
+ hz = profrate;
+ else if (hz != profrate)
+ {
+ fprintf (stderr,
+ _("%s: profiling rate incompatible with first gmon file\n"),
+ filename);
+ done (1);
+ }
+
+ header_size = sizeof (struct raw_phdr);
+ }
+ else
+ {
+ /* old style BSD format. */
+ if (file_format == FF_BSD44)
+ {
+ fprintf (stderr, _("%s: file `%s' has bad magic cookie\n"),
+ whoami, filename);
+ done (1);
+ }
+
+ if (fseek (ifp, sizeof (struct old_raw_phdr), SEEK_SET) < 0)
+ {
+ perror (filename);
+ done (1);
+ }
+
+ header_size = sizeof (struct old_raw_phdr);
+ }
+
+ if (s_highpc && (tmp.low_pc != h.low_pc ||
+ tmp.high_pc != h.high_pc || tmp.ncnt != h.ncnt))
+ {
+ fprintf (stderr, _("%s: incompatible with first gmon file\n"),
+ filename);
+ done (1);
+ }
+ h = tmp;
+ s_lowpc = (bfd_vma) h.low_pc;
+ s_highpc = (bfd_vma) h.high_pc;
+ lowpc = (bfd_vma) h.low_pc / sizeof (UNIT);
+ highpc = (bfd_vma) h.high_pc / sizeof (UNIT);
+ samp_bytes = h.ncnt - header_size;
+ hist_num_bins = samp_bytes / sizeof (UNIT);
+ DBG (SAMPLEDEBUG,
+ printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx ncnt %d\n",
+ h.low_pc, h.high_pc, h.ncnt);
+ printf ("[gmon_out_read] s_lowpc 0x%lx s_highpc 0x%lx\n",
+ s_lowpc, s_highpc);
+ printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx\n",
+ lowpc, highpc);
+ printf ("[gmon_out_read] samp_bytes %d hist_num_bins %d\n",
+ samp_bytes, hist_num_bins));
+
+ if (hist_num_bins)
+ {
+ ++nhist;
+ }
+
+ if (!hist_sample)
+ {
+ hist_sample =
+ (int *) xmalloc (hist_num_bins * sizeof (hist_sample[0]));
+ memset (hist_sample, 0, hist_num_bins * sizeof (hist_sample[0]));
+ }
+
+ for (i = 0; i < hist_num_bins; ++i)
+ {
+ if (fread (raw_bin_count, sizeof (raw_bin_count), 1, ifp) != 1)
+ {
+ fprintf (stderr,
+ _("%s: unexpected EOF after reading %d/%d bins\n"),
+ whoami, --i, hist_num_bins);
+ done (1);
+ }
+ hist_sample[i] += bfd_get_16 (core_bfd, (bfd_byte *) raw_bin_count);
+ }
+
+ /*
+ * The rest of the file consists of a bunch of <from,self,count>
+ * tuples:
+ */
+ while (fread (&raw_arc, sizeof (raw_arc), 1, ifp) == 1)
+ {
+ ++narcs;
+ from_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.from_pc);
+ self_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.self_pc);
+ count = bfd_get_32 (core_bfd, (bfd_byte *) raw_arc.count);
+ DBG (SAMPLEDEBUG,
+ printf ("[gmon_out_read] frompc 0x%lx selfpc 0x%lx count %lu\n",
+ from_pc, self_pc, count));
+ /* add this arc: */
+ cg_tally (from_pc, self_pc, count);
+ }
+ fclose (ifp);
+
+ if (hz == HZ_WRONG)
+ {
+ /*
+ * How many ticks per second? If we can't tell, report
+ * time in ticks.
+ */
+ hz = hertz ();
+ if (hz == HZ_WRONG)
+ {
+ hz = 1;
+ fprintf (stderr, _("time is in ticks, not seconds\n"));
+ }
+ }
+ }
+ else
+ {
+ fprintf (stderr, _("%s: don't know how to deal with file format %d\n"),
+ whoami, file_format);
+ done (1);
+ }
+
+ if (output_style & STYLE_GMON_INFO)
+ {
+ printf (_("File `%s' (version %d) contains:\n"),
+ filename, gmon_file_version);
+ printf (_("\t%d histogram record%s\n"),
+ nhist, nhist == 1 ? "" : "s");
+ printf (_("\t%d call-graph record%s\n"),
+ narcs, narcs == 1 ? "" : "s");
+ printf (_("\t%d basic-block count record%s\n"),
+ nbbs, nbbs == 1 ? "" : "s");
+ first_output = FALSE;
+ }
+}
+
+
+void
+DEFUN (gmon_out_write, (filename), const char *filename)
+{
+ FILE *ofp;
+ struct gmon_hdr ghdr;
+
+ ofp = fopen (filename, FOPEN_WB);
+ if (!ofp)
+ {
+ perror (filename);
+ done (1);
+ }
+
+ if (file_format == FF_AUTO || file_format == FF_MAGIC)
+ {
+ /* write gmon header: */
+
+ memcpy (&ghdr.cookie[0], GMON_MAGIC, 4);
+ bfd_put_32 (core_bfd, GMON_VERSION, (bfd_byte *) ghdr.version);
+ if (fwrite (&ghdr, sizeof (ghdr), 1, ofp) != 1)
+ {
+ perror (filename);
+ done (1);
+ }
+
+ /* write execution time histogram if we have one: */
+ if (gmon_input & INPUT_HISTOGRAM)
+ {
+ hist_write_hist (ofp, filename);
+ }
+
+ /* write call graph arcs if we have any: */
+ if (gmon_input & INPUT_CALL_GRAPH)
+ {
+ cg_write_arcs (ofp, filename);
+ }
+
+ /* write basic-block info if we have it: */
+ if (gmon_input & INPUT_BB_COUNTS)
+ {
+ bb_write_blocks (ofp, filename);
+ }
+ }
+ else if (file_format == FF_BSD || file_format == FF_BSD44)
+ {
+ struct raw_arc raw_arc;
+ UNIT raw_bin_count;
+ struct raw_phdr h;
+ int i;
+ Arc *arc;
+ Sym *sym;
+
+ memset (&h, 0, sizeof h);
+ put_vma (core_bfd, s_lowpc, (bfd_byte *) &h.low_pc);
+ put_vma (core_bfd, s_highpc, (bfd_byte *) &h.high_pc);
+ bfd_put_32 (core_bfd,
+ hist_num_bins * sizeof (UNIT) + sizeof (struct raw_phdr),
+ (bfd_byte *) &h.ncnt);
+
+ /* Write header. Use new style BSD format is explicitly
+ specified, or if the profiling rate is non-standard;
+ otherwise, use the old BSD format. */
+ if (file_format == FF_BSD44
+ || hz != hertz ())
+ {
+ bfd_put_32 (core_bfd, GMONVERSION, (bfd_byte *) &h.version);
+ bfd_put_32 (core_bfd, hz, (bfd_byte *) &h.profrate);
+ if (fwrite (&h, sizeof (struct raw_phdr), 1, ofp) != 1)
+ {
+ perror (filename);
+ done (1);
+ }
+ }
+ else
+ {
+ if (fwrite (&h, sizeof (struct old_raw_phdr), 1, ofp) != 1)
+ {
+ perror (filename);
+ done (1);
+ }
+ }
+
+ /* dump the samples: */
+
+ for (i = 0; i < hist_num_bins; ++i)
+ {
+ bfd_put_16 (core_bfd, hist_sample[i], (bfd_byte *) & raw_bin_count[0]);
+ if (fwrite (&raw_bin_count[0], sizeof (raw_bin_count), 1, ofp) != 1)
+ {
+ perror (filename);
+ done (1);
+ }
+ }
+
+ /* dump the normalized raw arc information: */
+
+ 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 (&raw_arc, sizeof (raw_arc), 1, ofp) != 1)
+ {
+ perror (filename);
+ done (1);
+ }
+ DBG (SAMPLEDEBUG,
+ printf ("[dumpsum] frompc 0x%lx selfpc 0x%lx count %lu\n",
+ arc->parent->addr, arc->child->addr, arc->count));
+ }
+ }
+ fclose (ofp);
+ }
+ else
+ {
+ fprintf (stderr, _("%s: don't know how to deal with file format %d\n"),
+ whoami, file_format);
+ done (1);
+ }
+}