Add tools for generating coverage information

Adds script coverage_report.py for generating code coverage
reports. This script depends on the llvm-gcov wrapper script and the
lcovrc config file that are checked in with it.

BUG=pdfium:797

Change-Id: I0416349186835c0e4dd7f4907d2b472a4406e027
Reviewed-on: https://pdfium-review.googlesource.com/7810
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

1 files changed, 156 insertions, 0 deletions

diff --git a/tools/coverage/lcovrc b/tools/coverage/lcovrc
new file mode 100644
index 0000000000..d2d39d75da
--- /dev/null
+++ b/tools/coverage/lcovrc
@@ -0,0 +1,156 @@
+# Specify an external style sheet file (same as --css-file option of genhtml)
+#genhtml_css_file = gcov.css
+
+# Specify coverage rate limits (in %) for classifying file entries
+# HI:   hi_limit <= rate <= 100         graph color: green
+# MED: med_limit <= rate <  hi_limit    graph color: orange
+# LO:         0  <= rate <  med_limit   graph color: red
+genhtml_hi_limit = 80
+genhtml_med_limit = 50
+
+# Width of line coverage field in source code view
+genhtml_line_field_width = 12
+
+# Width of branch coverage field in source code view
+genhtml_branch_field_width = 16
+
+# Width of overview image (used by --frames option of genhtml)
+genhtml_overview_width = 80
+
+# Resolution of overview navigation: this number specifies the maximum
+# difference in lines between the position a user selected from the overview
+# and the position the source code window is scrolled to (used by --frames
+# option of genhtml)
+genhtml_nav_resolution = 4
+
+# Clicking a line in the overview image should show the source code view at
+# a position a bit further up so that the requested line is not the first
+# line in the window. This number specifies that offset in lines (used by
+# --frames option of genhtml)
+genhtml_nav_offset = 10
+
+# Do not remove unused test descriptions if non-zero (same as
+# --keep-descriptions option of genhtml)
+genhtml_keep_descriptions = 0
+
+# Do not remove prefix from directory names if non-zero (same as --no-prefix
+# option of genhtml)
+genhtml_no_prefix = 0
+
+# Do not create source code view if non-zero (same as --no-source option of
+# genhtml)
+genhtml_no_source = 0
+
+# Replace tabs with number of spaces in source view (same as --num-spaces
+# option of genhtml)
+genhtml_num_spaces = 8
+
+# Highlight lines with converted-only data if non-zero (same as --highlight
+# option of genhtml)
+genhtml_highlight = 0
+
+# Include color legend in HTML output if non-zero (same as --legend option of
+# genhtml)
+genhtml_legend = 0
+
+# Use FILE as HTML prolog for generated pages (same as --html-prolog option of
+# genhtml)
+#genhtml_html_prolog = FILE
+
+# Use FILE as HTML epilog for generated pages (same as --html-epilog option of
+# genhtml)
+#genhtml_html_epilog = FILE
+
+# Use custom filename extension for pages (same as --html-extension option of
+# genhtml)
+#genhtml_html_extension = html
+
+# Compress all generated html files with gzip.
+#genhtml_html_gzip = 1
+
+# Include sorted overview pages (can be disabled by the --no-sort option of
+# genhtml)
+genhtml_sort = 1
+
+# Include function coverage data display (can be disabled by the
+# --no-func-coverage option of genhtml)
+genhtml_function_coverage = 1
+
+# Include branch coverage data display (can be disabled by the
+# --no-branch-coverage option of genhtml)
+genhtml_branch_coverage = 1
+
+# Specify the character set of all generated HTML pages
+genhtml_charset=UTF-8
+
+# Allow HTML markup in test case description text if non-zero
+genhtml_desc_html=0
+
+# Specify the precision for coverage rates
+#genhtml_precision=1
+
+# Location of the gcov tool (same as --gcov-info option of geninfo)
+#geninfo_gcov_tool = llvm-gcov
+
+# Adjust test names to include operating system information if non-zero
+#geninfo_adjust_testname = 0
+
+# Calculate checksum for each source code line if non-zero (same as --checksum
+# option of geninfo if non-zero, same as --no-checksum if zero)
+#geninfo_checksum = 1
+
+# Specify whether to capture coverage data for external source files (can
+# be overridden by the --external and --no-external options of geninfo/lcov)
+geninfo_external = 1
+
+# Enable libtool compatibility mode if non-zero (same as --compat-libtool option
+# of geninfo if non-zero, same as --no-compat-libtool if zero)
+#geninfo_compat_libtool = 0
+
+# Use gcov's --all-blocks option if non-zero
+#geninfo_gcov_all_blocks = 1
+
+# Specify compatiblity modes (same as --compat option of geninfo).
+#geninfo_compat = libtool=on, hammer=auto, split_crc=auto
+
+# Adjust path to source files by removing or changing path components that
+# match the specified pattern (Perl regular expression format)
+#geninfo_adjust_src_path = /tmp/build => /usr/src
+
+# Specify if geninfo should try to automatically determine the base-directory
+# when collecting coverage data.
+geninfo_auto_base = 1
+
+# Directory containing gcov kernel files
+# lcov_gcov_dir = /proc/gcov
+
+# Location of the insmod tool
+lcov_insmod_tool = /sbin/insmod
+
+# Location of the modprobe tool
+lcov_modprobe_tool = /sbin/modprobe
+
+# Location of the rmmod tool
+lcov_rmmod_tool = /sbin/rmmod
+
+# Location for temporary directories
+lcov_tmp_dir = /tmp
+
+# Show full paths during list operation if non-zero (same as --list-full-path
+# option of lcov)
+lcov_list_full_path = 0
+
+# Specify the maximum width for list output. This value is ignored when
+# lcov_list_full_path is non-zero.
+lcov_list_width = 80
+
+# Specify the maximum percentage of file names which may be truncated when
+# choosing a directory prefix in list output. This value is ignored when
+# lcov_list_full_path is non-zero.
+lcov_list_truncate_max = 20
+
+# Specify if function coverage data should be collected and processed.
+lcov_function_coverage = 1
+
+# Specify if branch coverage data should be collected and processed.
+lcov_branch_coverage = 1