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authorKen Raeburn <raeburn@cygnus>1995-02-07 22:34:18 +0000
committerKen Raeburn <raeburn@cygnus>1995-02-07 22:34:18 +0000
commit5489fcc3d9dbb1f529dddb19b615e23d8ed59dc7 (patch)
tree1a79cfffd92f2afb67780dd7372c1759c49791aa /gprof/gmon_io.c
parent2559e01429d193b7957c106a6a8b0598476f9845 (diff)
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Lots of changes from David Mosberger-Tang; see ChangeLog and NOTES for details:
Alpha support. Long options. New file format to support more information; backwards compatibility. Line-level profiling, on systems where bfd_find_nearest_line works. Selective display of data.
Diffstat (limited to 'gprof/gmon_io.c')
-rw-r--r--gprof/gmon_io.c354
1 files changed, 354 insertions, 0 deletions
diff --git a/gprof/gmon_io.c b/gprof/gmon_io.c
new file mode 100644
index 0000000..45d1708
--- /dev/null
+++ b/gprof/gmon_io.c
@@ -0,0 +1,354 @@
+/*
+ * Input and output from/to gmon.out files.
+ */
+#include "cg_arcs.h"
+#include "basic_blocks.h"
+#include "bfd.h"
+#include "core.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(bfd_vma)) {
+ 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(bfd_vma));
+ done(1);
+ } /* switch */
+} /* get_vma */
+
+
+/*
+ * 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(bfd_vma)) {
+ 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(bfd_vma));
+ done(1);
+ } /* switch */
+} /* put_vma */
+
+
+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 */
+ } /* if */
+ 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 */
+
+ 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);
+ } /* if */
+
+ /* 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);
+ } /* if */
+
+ /* 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);
+ } /* switch */
+ } /* while */
+ } else if (file_format == FF_AUTO || file_format == FF_BSD) {
+ struct hdr {
+ bfd_vma low_pc;
+ bfd_vma high_pc;
+ int ncnt;
+ };
+ int i, samp_bytes, 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 */
+ 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);
+ } /* if */
+ 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 (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);
+ } /* if */
+ 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 - sizeof(struct raw_phdr);
+ 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 */
+
+ 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]));
+ } /* if */
+
+ 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);
+ } /* if */
+ hist_sample[i] += bfd_get_16(core_bfd, (bfd_byte*) raw_bin_count);
+ } /* for */
+
+ /*
+ * 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 %d\n",
+ from_pc, self_pc, count));
+ /* add this arc: */
+ cg_tally(from_pc, self_pc, count);
+ } /* while */
+ 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");
+ } /* if */
+ } /* if */
+ } else {
+ fprintf(stderr, "%s: don't know how to deal with file format %d\n",
+ whoami, file_format);
+ done(1);
+ } /* if */
+
+ 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;
+ } /* if */
+} /* gmon_out_read */
+
+
+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 */
+
+ 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);
+ } /* if */
+
+ /* write execution time histogram if we have one: */
+ if (gmon_input & INPUT_HISTOGRAM) {
+ hist_write_hist(ofp, filename);
+ } /* if */
+
+ /* write call graph arcs if we have any: */
+ if (gmon_input & INPUT_CALL_GRAPH) {
+ cg_write_arcs(ofp, filename);
+ } /* if */
+
+ /* write basic-block info if we have it: */
+ if (gmon_input & INPUT_BB_COUNTS) {
+ bb_write_blocks(ofp, filename);
+ } /* if */
+ } else if (file_format == FF_BSD) {
+ struct raw_arc raw_arc;
+ UNIT raw_bin_count;
+ bfd_vma lpc, hpc;
+ int i, ncnt;
+ Arc *arc;
+ Sym *sym;
+
+ put_vma(core_bfd, s_lowpc, (bfd_byte*) &lpc);
+ put_vma(core_bfd, s_highpc, (bfd_byte*) &hpc);
+ bfd_put_32(core_bfd,
+ hist_num_bins * sizeof(UNIT) + sizeof(struct raw_phdr),
+ (bfd_byte*) &ncnt);
+
+ /* write header: */
+ if (fwrite(&lpc, sizeof(lpc), 1, ofp) != 1
+ || fwrite(&hpc, sizeof(hpc), 1, ofp) != 1
+ || fwrite(&ncnt, sizeof(ncnt), 1, ofp) != 1)
+ {
+ perror(filename);
+ done(1);
+ } /* if */
+
+ /* 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);
+ } /* if */
+ } /* for */
+
+ /* 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);
+ } /* if */
+ DBG(SAMPLEDEBUG,
+ printf("[dumpsum] frompc 0x%lx selfpc 0x%lx count %d\n",
+ arc->parent->addr, arc->child->addr, arc->count));
+ } /* for */
+ } /* for */
+ fclose(ofp);
+ } else {
+ fprintf(stderr, "%s: don't know how to deal with file format %d\n",
+ whoami, file_format);
+ done(1);
+ } /* if */
+} /* gmon_out_write */
+
+ /*** gmon_out.c ***/