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authorVladimir Prus <vladimir@codesourcery.com>2007-04-10 07:57:31 +0000
committerVladimir Prus <vladimir@codesourcery.com>2007-04-10 07:57:31 +0000
commitb3296dc54c51d28ada4c97aca7f55a4abfe09d9a (patch)
tree574e097a5069021c4cb996d8012d8830e4ca1c0b /gprof/gprof.texi
parent8e77c9de92cec383d9fa3b1f8cf10e4840174396 (diff)
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* hist.h (struct histogram)
(histograms, num_histograms): New. * hist.c (find_histogram, find_histogram_for_pc) (read_histogram_header): New. (s_lowpc, s_highpc, lowpc, highpc, hist_num_bins) (hist_sample): Remove. (hist_read_rec): Use the above, and handle multiple histogram records with disjoint address ranges. (hist_write_hist): Support several histogram records. (scale_and_align_entries): Adjust for multiple histograms. (hist_assign_samples_1): New. (hist_assign_samples): Use the above. (hist_clip_symbol_address): New. * hist.h (hist_check_address) (hist_clip_symbol_address): Declare. * gmon_io.c (gmon_out_read, gmon_out_write): Adjust handling of legacy format for multiple histogram changes. * corefile.c (find_call): Check for core_text_space and clip symbol address range here. * vax.c (vax_find_call): Don't check for core_text_space, or clip the symbol's address range here. Use hist_check_address to check call's target address. * sparc.c: Likewise. * tahoe.c: Likewise. * i386.c: Likewise. * mips.c: Likewise. Also use core_text_sect->vma as the base address for code accesses, just like other machine-specific routines do. * gprof.texi: Adjust for the new logic.
Diffstat (limited to 'gprof/gprof.texi')
-rw-r--r--gprof/gprof.texi11
1 files changed, 6 insertions, 5 deletions
diff --git a/gprof/gprof.texi b/gprof/gprof.texi
index f8be278..969d60e 100644
--- a/gprof/gprof.texi
+++ b/gprof/gprof.texi
@@ -2082,11 +2082,12 @@ New-style histogram records are read by @code{hist.c:@-hist_read_rec}.
For the first histogram record, allocate a memory array to hold
all the bins, and read them in.
When multiple profile data files (or files with multiple histogram
-records) are read, the starting address, ending address, number
-of bins and sampling rate must match between the various histograms,
-or a fatal error will result.
-If everything matches, just sum the additional histograms into
-the existing in-memory array.
+records) are read, the memory ranges of each pair of histogram records
+must be either equal, or non-overlapping. For each pair of histogram
+records, the resolution (memory region size divided by the number of
+bins) must be the same. The time unit must be the same for all
+histogram records. If the above containts are met, all histograms
+for the same memory range are merged.
As each call graph record is read (@code{call_graph.c:@-cg_read_rec}),
the parent and child addresses