/* Gcov.c: prepend line execution counts and branch probabilities to a
source file.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998,
- 1999, 2000, 2001 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by James E. Wilson of Cygnus Support.
Mangled by Bob Manson of Cygnus Support.
+ Mangled further by Nathan Sidwell <nathan@codesourcery.com>
Gcov is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-/* ??? The code in final.c that produces the struct bb assumes that there is
- no padding between the fields. This is not necessary true. The current
- code can only be trusted if longs and pointers are the same size. */
-
-/* ??? No need to print an execution count on every line, could just print
- it on the first line of each block, and only print it on a subsequent
- line in the same block if the count changes. */
-
/* ??? Print a list of the ten blocks with the highest execution counts,
and list the line numbers corresponding to those blocks. Also, perhaps
list the line numbers with the highest execution counts, only printing
/* ??? Should have an option to print the number of basic blocks, and the
percent of them that are covered. */
-/* ??? Does not correctly handle the case where two .bb files refer to the
- same included source file. For example, if one has a short file containing
- only inline functions, which is then included in two other files, then
- there will be two .bb files which refer to the include file, but there
- is no way to get the total execution counts for the included file, can
- only get execution counts for one or the other of the including files. */
+/* ??? Does not correctly handle the case where two .bb files refer to
+ the same included source file. For example, if one has a short
+ file containing only inline functions, which is then included in
+ two other files, then there will be two .bb files which refer to
+ the include file, but there is no way to get the total execution
+ counts for the included file, can only get execution counts for one
+ or the other of the including files. this can be fixed by --ratios
+ --long-file-names --preserve-paths and perl. */
+
+/* Need an option to show individual block counts, and show
+ probabilities of fall through arcs. */
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "intl.h"
-#undef abort
+#include "version.h"
+
+#include <getopt.h>
-typedef HOST_WIDEST_INT gcov_type;
+#define IN_GCOV 1
#include "gcov-io.h"
+#include "gcov-io.c"
-/* The .bb file format consists of several lists of 4-byte integers
- which are the line numbers of each basic block in the file. Each
- list is terminated by a zero. These lists correspond to the basic
- blocks in the reconstructed program flow graph.
+/* The bbg file is generated by -ftest-coverage option. The da file is
+ generated by a program compiled with -fprofile-arcs. Their formats
+ are documented in gcov-io.h. */
- A line number of -1 indicates that a source file name (padded to a
- long boundary) follows. The padded file name is followed by
- another -1 to make it easy to scan past file names. A -2 indicates
- that a function name (padded to a long boundary) follows; the name
- is followed by another -2 to make it easy to scan past the function
- name.
+/* The functions in this file for creating and solution program flow graphs
+ are very similar to functions in the gcc source file profile.c. In
+ some places we make use of the knowledge of how profile.c works to
+ select particular algorithms here. */
- The .bbg file contains enough info to enable gcov to reconstruct the
- program flow graph. The first word is the number of basic blocks,
- the second word is the number of arcs, followed by the list of arcs
- (source bb, dest bb pairs), then a -1, then the number of instrumented
- arcs followed by the instrumented arcs, followed by another -1. This
- is repeated for each function.
+/* This is the size of the buffer used to read in source file lines. */
- The .da file contains the execution count for each instrumented branch.
+#define STRING_SIZE 200
- The .bb and .bbg files are created by giving GCC the -ftest-coverage option,
- and the .da files are created when an executable compiled with
- -fprofile-arcs is run. */
+struct function_info;
+struct block_info;
+struct source_info;
-/* The functions in this file for creating and solution program flow graphs
- are very similar to functions in the gcc source file profile.c. */
+/* Describes an arc between two basic blocks. */
-static const char gcov_version_string[] = "GNU gcov version 1.5\n";
+typedef struct arc_info
+{
+ /* source and destination blocks. */
+ struct block_info *src;
+ struct block_info *dst;
-/* This is the size of the buffer used to read in source file lines. */
+ /* transition counts. */
+ gcov_type count;
+ /* used in cycle search, so that we do not clobber original counts. */
+ gcov_type cs_count;
-#define STRING_SIZE 200
+ unsigned int count_valid : 1;
+ unsigned int on_tree : 1;
+ unsigned int fake : 1;
+ unsigned int fall_through : 1;
+
+ /* Arc is for a function that abnormally returns. */
+ unsigned int is_call_non_return : 1;
-/* One copy of this structure is created for each source file mentioned in the
- .bb file. */
+ /* Arc is for catch/setjump. */
+ unsigned int is_nonlocal_return : 1;
-struct sourcefile
+ /* Is an unconditional branch. */
+ unsigned int is_unconditional : 1;
+
+ /* Loop making arc. */
+ unsigned int cycle : 1;
+
+ /* Next branch on line. */
+ struct arc_info *line_next;
+
+ /* Links to next arc on src and dst lists. */
+ struct arc_info *succ_next;
+ struct arc_info *pred_next;
+} arc_t;
+
+/* Describes a basic block. Contains lists of arcs to successor and
+ predecessor blocks. */
+
+typedef struct block_info
{
+ /* Chain of exit and entry arcs. */
+ arc_t *succ;
+ arc_t *pred;
+
+ /* Number of unprocessed exit and entry arcs. */
+ gcov_type num_succ;
+ gcov_type num_pred;
+
+ /* Block execution count. */
+ gcov_type count;
+ unsigned flags : 13;
+ unsigned count_valid : 1;
+ unsigned valid_chain : 1;
+ unsigned invalid_chain : 1;
+
+ /* Block is a call instrumenting site. */
+ unsigned is_call_site : 1; /* Does the call. */
+ unsigned is_call_return : 1; /* Is the return. */
+
+ /* Block is a landing pad for longjmp or throw. */
+ unsigned is_nonlocal_return : 1;
+
+ union
+ {
+ struct
+ {
+ /* Array of line numbers and source files. source files are
+ introduced by a linenumber of zero, the next 'line number' is
+ the number of the source file. Always starts with a source
+ file. */
+ unsigned *encoding;
+ unsigned num;
+ } line; /* Valid until blocks are linked onto lines */
+ struct
+ {
+ /* Single line graph cycle workspace. Used for all-blocks
+ mode. */
+ arc_t *arc;
+ unsigned ident;
+ } cycle; /* Used in all-blocks mode, after blocks are linked onto
+ lines. */
+ } u;
+
+ /* Temporary chain for solving graph, and for chaining blocks on one
+ line. */
+ struct block_info *chain;
+
+} block_t;
+
+/* Describes a single function. Contains an array of basic blocks. */
+
+typedef struct function_info
+{
+ /* Name of function. */
char *name;
- int maxlineno;
- struct sourcefile *next;
-};
+ unsigned ident;
+ unsigned checksum;
-/* This points to the head of the sourcefile structure list. */
+ /* Array of basic blocks. */
+ block_t *blocks;
+ unsigned num_blocks;
+ unsigned blocks_executed;
-struct sourcefile *sources;
+ /* Raw arc coverage counts. */
+ gcov_type *counts;
+ unsigned num_counts;
-/* One of these is dynamically created whenever we identify an arc in the
- function. */
+ /* First line number. */
+ unsigned line;
+ struct source_info *src;
-struct adj_list {
- int source;
- int target;
- gcov_type arc_count;
- unsigned int count_valid : 1;
- unsigned int on_tree : 1;
- unsigned int fake : 1;
- unsigned int fall_through : 1;
-#if 0
- /* Not needed for gcov, but defined in profile.c. */
- rtx branch_insn;
-#endif
- struct adj_list *pred_next;
- struct adj_list *succ_next;
-};
+ /* Next function in same source file. */
+ struct function_info *line_next;
-/* Count the number of basic blocks, and create an array of these structures,
- one for each bb in the function. */
+ /* Next function. */
+ struct function_info *next;
+} function_t;
-struct bb_info {
- struct adj_list *succ;
- struct adj_list *pred;
- gcov_type succ_count;
- gcov_type pred_count;
- gcov_type exec_count;
- unsigned int count_valid : 1;
- unsigned int on_tree : 1;
-#if 0
- /* Not needed for gcov, but defined in profile.c. */
- rtx first_insn;
-#endif
-};
+/* Describes coverage of a file or function. */
-/* When outputting branch probabilities, one of these structures is created
- for each branch/call. */
+typedef struct coverage_info
+{
+ int lines;
+ int lines_executed;
-struct arcdata
+ int branches;
+ int branches_executed;
+ int branches_taken;
+
+ int calls;
+ int calls_executed;
+
+ char *name;
+} coverage_t;
+
+/* Describes a single line of source. Contains a chain of basic blocks
+ with code on it. */
+
+typedef struct line_info
{
- gcov_type hits;
- gcov_type total;
- int call_insn;
- struct arcdata *next;
-};
+ gcov_type count; /* execution count */
+ union
+ {
+ arc_t *branches; /* branches from blocks that end on this
+ line. Used for branch-counts when not
+ all-blocks mode. */
+ block_t *blocks; /* blocks which start on this line. Used
+ in all-blocks mode. */
+ } u;
+ unsigned exists : 1;
+} line_t;
+
+/* Describes a file mentioned in the block graph. Contains an array
+ of line info. */
+
+typedef struct source_info
+{
+ /* Name of source file. */
+ char *name;
+ unsigned index;
-/* Used to save the list of bb_graphs, one per function. */
+ /* Array of line information. */
+ line_t *lines;
+ unsigned num_lines;
-struct bb_info_list {
- /* Indexed by block number, holds the basic block graph for one function. */
- struct bb_info *bb_graph;
- int num_blocks;
- struct bb_info_list *next;
-};
+ coverage_t coverage;
-/* Holds a list of function basic block graphs. */
+ /* Functions in this source file. These are in ascending line
+ number order. */
+ function_t *functions;
-static struct bb_info_list *bb_graph_list = 0;
+ /* Next source file. */
+ struct source_info *next;
+} source_t;
-/* Name and file pointer of the input file for the basic block graph. */
+/* Holds a list of function basic block graphs. */
-static char *bbg_file_name;
-static FILE *bbg_file;
+static function_t *functions;
-/* Name and file pointer of the input file for the arc count data. */
+/* This points to the head of the sourcefile structure list. */
-static char *da_file_name;
-static FILE *da_file;
+static source_t *sources;
-/* Name and file pointer of the input file for the basic block line counts. */
+/* This holds data summary information. */
-static char *bb_file_name;
-static FILE *bb_file;
+static struct gcov_summary object_summary;
+static unsigned program_count;
-/* Holds the entire contents of the bb_file read into memory. */
+/* Modification time of graph file. */
-static char *bb_data;
+static time_t bbg_file_time;
-/* Size of bb_data array in longs. */
+/* Name and file pointer of the input file for the basic block graph. */
-static long bb_data_size;
+static char *bbg_file_name;
-/* Name and file pointer of the output file. */
+/* Stamp of the bbg file */
+static unsigned bbg_stamp;
-static char *gcov_file_name;
-static FILE *gcov_file;
+/* Name and file pointer of the input file for the arc count data. */
-/* Name of the file mentioned on the command line. */
+static char *da_file_name;
-static char *input_file_name = 0;
+/* Output branch probabilities. */
-/* Output branch probabilities if true. */
+static int flag_branches = 0;
-static int output_branch_probs = 0;
+/* Show unconditional branches too. */
+static int flag_unconditional = 0;
/* Output a gcov file if this is true. This is on by default, and can
be turned off by the -n option. */
-static int output_gcov_file = 1;
+static int flag_gcov_file = 1;
+
+/* For included files, make the gcov output file name include the name
+ of the input source file. For example, if x.h is included in a.c,
+ then the output file name is a.c##x.h.gcov instead of x.h.gcov. */
+
+static int flag_long_names = 0;
-/* For included files, make the gcov output file name include the name of
- the input source file. For example, if x.h is included in a.c, then the
- output file name is a.c.x.h.gcov instead of x.h.gcov. This works only
- when a single source file is specified. */
+/* Output count information for every basic block, not merely those
+ that contain line number information. */
-static int output_long_names = 0;
+static int flag_all_blocks = 0;
/* Output summary info for each function. */
-static int output_function_summary = 0;
+static int flag_function_summary = 0;
-/* Object directory file prefix. This is the directory where .bb and .bbg
- files are looked for, if non-zero. */
+/* Object directory file prefix. This is the directory/file where the
+ graph and data files are looked for, if nonzero. */
static char *object_directory = 0;
+/* Preserve all pathname components. Needed when object files and
+ source files are in subdirectories. '/' is mangled as '#', '.' is
+ elided and '..' mangled to '^'. */
+
+static int flag_preserve_paths = 0;
+
/* Output the number of times a branch was taken as opposed to the percentage
- of times it was taken. Turned on by the -c option */
+ of times it was taken. */
-static int output_branch_counts = 0;
+static int flag_counts = 0;
/* Forward declarations. */
-static void process_args PARAMS ((int, char **));
-static void open_files PARAMS ((void));
-static void read_files PARAMS ((void));
-static void scan_for_source_files PARAMS ((void));
-static void output_data PARAMS ((void));
-static void print_usage PARAMS ((void)) ATTRIBUTE_NORETURN;
-static void init_arc PARAMS ((struct adj_list *, int, int, struct bb_info *));
-static struct adj_list *reverse_arcs PARAMS ((struct adj_list *));
-static void create_program_flow_graph PARAMS ((struct bb_info_list *));
-static void solve_program_flow_graph PARAMS ((struct bb_info_list *));
-static void calculate_branch_probs PARAMS ((struct bb_info_list *, int,
- struct arcdata **, int));
-static void function_summary PARAMS ((void));
-
-extern int main PARAMS ((int, char **));
+static void fnotice (FILE *, const char *, ...) ATTRIBUTE_PRINTF_2;
+static int process_args (int, char **);
+static void print_usage (int) ATTRIBUTE_NORETURN;
+static void print_version (void) ATTRIBUTE_NORETURN;
+static void process_file (const char *);
+static void create_file_names (const char *);
+static source_t *find_source (const char *);
+static int read_graph_file (void);
+static int read_count_file (void);
+static void solve_flow_graph (function_t *);
+static void add_branch_counts (coverage_t *, const arc_t *);
+static void add_line_counts (coverage_t *, function_t *);
+static void function_summary (const coverage_t *, const char *);
+static const char *format_gcov (gcov_type, gcov_type, int);
+static void accumulate_line_counts (source_t *);
+static int output_branch_count (FILE *, int, const arc_t *);
+static void output_lines (FILE *, const source_t *);
+static char *make_gcov_file_name (const char *, const char *);
+static void release_structures (void);
+extern int main (int, char **);
int
-main (argc, argv)
- int argc;
- char **argv;
+main (int argc, char **argv)
{
- gcc_init_libintl ();
+ int argno;
- process_args (argc, argv);
+ /* Unlock the stdio streams. */
+ unlock_std_streams ();
- open_files ();
+ gcc_init_libintl ();
- read_files ();
+ argno = process_args (argc, argv);
+ if (optind == argc)
+ print_usage (true);
- scan_for_source_files ();
+ for (; argno != argc; argno++)
+ {
+ release_structures ();
- output_data ();
+ process_file (argv[argno]);
+ }
return 0;
}
-static void fnotice PARAMS ((FILE *, const char *, ...)) ATTRIBUTE_PRINTF_2;
static void
-fnotice VPARAMS ((FILE *file, const char *msgid, ...))
+fnotice (FILE *file, const char *msgid, ...)
{
- VA_OPEN (ap, msgid);
- VA_FIXEDARG (ap, FILE *, file);
- VA_FIXEDARG (ap, const char *, msgid);
+ va_list ap;
+ va_start (ap, msgid);
vfprintf (file, _(msgid), ap);
- VA_CLOSE (ap);
+ va_end (ap);
}
+\f
+/* Print a usage message and exit. If ERROR_P is nonzero, this is an error,
+ otherwise the output of --help. */
-/* More 'friendly' abort that prints the line and file.
- config.h can #define abort fancy_abort if you like that sort of thing. */
-extern void fancy_abort PARAMS ((void)) ATTRIBUTE_NORETURN;
-
-void
-fancy_abort ()
+static void
+print_usage (int error_p)
{
- fnotice (stderr, "Internal gcov abort.\n");
- exit (FATAL_EXIT_CODE);
+ FILE *file = error_p ? stderr : stdout;
+ int status = error_p ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE;
+
+ fnotice (file, "Usage: gcov [OPTION]... SOURCEFILE\n\n");
+ fnotice (file, "Print code coverage information.\n\n");
+ fnotice (file, " -h, --help Print this help, then exit\n");
+ fnotice (file, " -v, --version Print version number, then exit\n");
+ fnotice (file, " -a, --all-blocks Show information for every basic block\n");
+ fnotice (file, " -b, --branch-probabilities Include branch probabilities in output\n");
+ fnotice (file, " -c, --branch-counts Given counts of branches taken\n\
+ rather than percentages\n");
+ fnotice (file, " -n, --no-output Do not create an output file\n");
+ fnotice (file, " -l, --long-file-names Use long output file names for included\n\
+ source files\n");
+ fnotice (file, " -f, --function-summaries Output summaries for each function\n");
+ fnotice (file, " -o, --object-directory DIR|FILE Search for object files in DIR or called FILE\n");
+ fnotice (file, " -p, --preserve-paths Preserve all pathname components\n");
+ fnotice (file, " -u, --unconditional-branches Show unconditional branch counts too\n");
+ fnotice (file, "\nFor bug reporting instructions, please see:\n%s.\n",
+ bug_report_url);
+ exit (status);
}
-\f
-/* Print a usage message and exit. */
+
+/* Print version information and exit. */
static void
-print_usage ()
+print_version (void)
{
- fnotice (stderr, "gcov [-b] [-v] [-n] [-l] [-f] [-o OBJDIR] file\n");
- exit (FATAL_EXIT_CODE);
+ fnotice (stdout, "gcov (GCC) %s\n", version_string);
+ fprintf (stdout, "Copyright %s 2004 Free Software Foundation, Inc.\n",
+ _("(C)"));
+ fnotice (stdout,
+ _("This is free software; see the source for copying conditions.\n"
+ "There is NO warranty; not even for MERCHANTABILITY or \n"
+ "FITNESS FOR A PARTICULAR PURPOSE.\n\n"));
+ exit (SUCCESS_EXIT_CODE);
}
-/* Parse the command line. */
+static const struct option options[] =
+{
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, 'v' },
+ { "all-blocks", no_argument, NULL, 'a' },
+ { "branch-probabilities", no_argument, NULL, 'b' },
+ { "branch-counts", no_argument, NULL, 'c' },
+ { "no-output", no_argument, NULL, 'n' },
+ { "long-file-names", no_argument, NULL, 'l' },
+ { "function-summaries", no_argument, NULL, 'f' },
+ { "preserve-paths", no_argument, NULL, 'p' },
+ { "object-directory", required_argument, NULL, 'o' },
+ { "object-file", required_argument, NULL, 'o' },
+ { "unconditional-branches", no_argument, NULL, 'u' },
+ { 0, 0, 0, 0 }
+};
+
+/* Process args, return index to first non-arg. */
-static void
-process_args (argc, argv)
- int argc;
- char **argv;
+static int
+process_args (int argc, char **argv)
{
- int i;
+ int opt;
- for (i = 1; i < argc; i++)
+ while ((opt = getopt_long (argc, argv, "abcfhlno:puv", options, NULL)) != -1)
{
- if (argv[i][0] == '-')
+ switch (opt)
{
- if (argv[i][1] == 'b')
- output_branch_probs = 1;
- else if (argv[i][1] == 'c')
- output_branch_counts = 1;
- else if (argv[i][1] == 'v')
- fputs (gcov_version_string, stderr);
- else if (argv[i][1] == 'n')
- output_gcov_file = 0;
- else if (argv[i][1] == 'l')
- output_long_names = 1;
- else if (argv[i][1] == 'f')
- output_function_summary = 1;
- else if (argv[i][1] == 'o' && argv[i][2] == '\0')
- object_directory = argv[++i];
- else
- print_usage ();
+ case 'a':
+ flag_all_blocks = 1;
+ break;
+ case 'b':
+ flag_branches = 1;
+ break;
+ case 'c':
+ flag_counts = 1;
+ break;
+ case 'f':
+ flag_function_summary = 1;
+ break;
+ case 'h':
+ print_usage (false);
+ /* print_usage will exit. */
+ case 'l':
+ flag_long_names = 1;
+ break;
+ case 'n':
+ flag_gcov_file = 0;
+ break;
+ case 'o':
+ object_directory = optarg;
+ break;
+ case 'p':
+ flag_preserve_paths = 1;
+ break;
+ case 'u':
+ flag_unconditional = 1;
+ break;
+ case 'v':
+ print_version ();
+ /* print_version will exit. */
+ default:
+ print_usage (true);
+ /* print_usage will exit. */
}
- else if (! input_file_name)
- input_file_name = argv[i];
- else
- print_usage ();
}
- if (! input_file_name)
- print_usage ();
+ return optind;
}
-
-/* Find and open the .bb, .da, and .bbg files. */
+/* Process a single source file. */
static void
-open_files ()
+process_file (const char *file_name)
{
- int count, objdir_count;
- char *cptr;
+ source_t *src;
+ function_t *fn;
- /* Determine the names of the .bb, .bbg, and .da files. Strip off the
- extension, if any, and append the new extensions. */
- count = strlen (input_file_name);
- if (object_directory)
- objdir_count = strlen (object_directory);
- else
- objdir_count = 0;
+ create_file_names (file_name);
+ if (read_graph_file ())
+ return;
- da_file_name = xmalloc (count + objdir_count + 4);
- bb_file_name = xmalloc (count + objdir_count + 4);
- bbg_file_name = xmalloc (count + objdir_count + 5);
+ if (!functions)
+ {
+ fnotice (stderr, "%s:no functions found\n", bbg_file_name);
+ return;
+ }
- if (object_directory)
+ if (read_count_file ())
+ return;
+
+ for (fn = functions; fn; fn = fn->next)
+ solve_flow_graph (fn);
+ for (src = sources; src; src = src->next)
+ src->lines = xcalloc (src->num_lines, sizeof (line_t));
+ for (fn = functions; fn; fn = fn->next)
{
- strcpy (da_file_name, object_directory);
- strcpy (bb_file_name, object_directory);
- strcpy (bbg_file_name, object_directory);
+ coverage_t coverage;
- if (object_directory[objdir_count - 1] != '/')
+ memset (&coverage, 0, sizeof (coverage));
+ coverage.name = fn->name;
+ add_line_counts (flag_function_summary ? &coverage : NULL, fn);
+ if (flag_function_summary)
{
- strcat (da_file_name, "/");
- strcat (bb_file_name, "/");
- strcat (bbg_file_name, "/");
+ function_summary (&coverage, "Function");
+ fnotice (stdout, "\n");
}
+ }
- cptr = strrchr (input_file_name, '/');
- if (cptr)
- {
- strcat (da_file_name, cptr + 1);
- strcat (bb_file_name, cptr + 1);
- strcat (bbg_file_name, cptr + 1);
- }
- else
+ for (src = sources; src; src = src->next)
+ {
+ accumulate_line_counts (src);
+ function_summary (&src->coverage, "File");
+ if (flag_gcov_file)
{
- strcat (da_file_name, input_file_name);
- strcat (bb_file_name, input_file_name);
- strcat (bbg_file_name, input_file_name);
+ char *gcov_file_name = make_gcov_file_name (file_name, src->name);
+ FILE *gcov_file = fopen (gcov_file_name, "w");
+
+ if (gcov_file)
+ {
+ fnotice (stdout, "%s:creating '%s'\n",
+ src->name, gcov_file_name);
+ output_lines (gcov_file, src);
+ if (ferror (gcov_file))
+ fnotice (stderr, "%s:error writing output file '%s'\n",
+ src->name, gcov_file_name);
+ fclose (gcov_file);
+ }
+ else
+ fnotice (stderr, "%s:could not open output file '%s'\n",
+ src->name, gcov_file_name);
+ free (gcov_file_name);
}
+ fnotice (stdout, "\n");
}
- else
- {
- strcpy (da_file_name, input_file_name);
- strcpy (bb_file_name, input_file_name);
- strcpy (bbg_file_name, input_file_name);
- }
+}
- cptr = strrchr (bb_file_name, '.');
- if (cptr)
- strcpy (cptr, ".bb");
- else
- strcat (bb_file_name, ".bb");
+/* Release all memory used. */
- cptr = strrchr (da_file_name, '.');
- if (cptr)
- strcpy (cptr, ".da");
- else
- strcat (da_file_name, ".da");
+static void
+release_structures (void)
+{
+ function_t *fn;
+ source_t *src;
- cptr = strrchr (bbg_file_name, '.');
- if (cptr)
- strcpy (cptr, ".bbg");
- else
- strcat (bbg_file_name, ".bbg");
+ free (bbg_file_name);
+ free (da_file_name);
+ da_file_name = bbg_file_name = NULL;
+ bbg_file_time = 0;
+ bbg_stamp = 0;
- bb_file = fopen (bb_file_name, "rb");
- if (bb_file == NULL)
+ while ((src = sources))
{
- fnotice (stderr, "Could not open basic block file %s.\n", bb_file_name);
- exit (FATAL_EXIT_CODE);
- }
+ sources = src->next;
- /* If none of the functions in the file were executed, then there won't
- be a .da file. Just assume that all counts are zero in this case. */
- da_file = fopen (da_file_name, "rb");
- if (da_file == NULL)
- {
- fnotice (stderr, "Could not open data file %s.\n", da_file_name);
- fnotice (stderr, "Assuming that all execution counts are zero.\n");
+ free (src->name);
+ free (src->lines);
}
- bbg_file = fopen (bbg_file_name, "rb");
- if (bbg_file == NULL)
+ while ((fn = functions))
{
- fnotice (stderr, "Could not open program flow graph file %s.\n",
- bbg_file_name);
- exit (FATAL_EXIT_CODE);
- }
+ unsigned ix;
+ block_t *block;
- /* Check for empty .bbg file. This indicates that there is no executable
- code in this source file. */
- /* Set the EOF condition if at the end of file. */
- ungetc (getc (bbg_file), bbg_file);
- if (feof (bbg_file))
- {
- fnotice (stderr, "No executable code associated with file %s.\n",
- input_file_name);
- exit (FATAL_EXIT_CODE);
+ functions = fn->next;
+ for (ix = fn->num_blocks, block = fn->blocks; ix--; block++)
+ {
+ arc_t *arc, *arc_n;
+
+ for (arc = block->succ; arc; arc = arc_n)
+ {
+ arc_n = arc->succ_next;
+ free (arc);
+ }
+ }
+ free (fn->blocks);
+ free (fn->counts);
}
}
-\f
-/* Initialize a new arc. */
+
+/* Generate the names of the graph and data files. If OBJECT_DIRECTORY
+ is not specified, these are looked for in the current directory,
+ and named from the basename of the FILE_NAME sans extension. If
+ OBJECT_DIRECTORY is specified and is a directory, the files are in
+ that directory, but named from the basename of the FILE_NAME, sans
+ extension. Otherwise OBJECT_DIRECTORY is taken to be the name of
+ the object *file*, and the data files are named from that. */
static void
-init_arc (arcptr, source, target, bb_graph)
- struct adj_list *arcptr;
- int source, target;
- struct bb_info *bb_graph;
+create_file_names (const char *file_name)
{
- arcptr->target = target;
- arcptr->source = source;
-
- arcptr->arc_count = 0;
- arcptr->count_valid = 0;
- arcptr->on_tree = 0;
- arcptr->fake = 0;
- arcptr->fall_through = 0;
-
- arcptr->succ_next = bb_graph[source].succ;
- bb_graph[source].succ = arcptr;
- bb_graph[source].succ_count++;
-
- arcptr->pred_next = bb_graph[target].pred;
- bb_graph[target].pred = arcptr;
- bb_graph[target].pred_count++;
-}
+ char *cptr;
+ char *name;
+ int length = strlen (file_name);
+ int base;
+ if (object_directory && object_directory[0])
+ {
+ struct stat status;
-/* Reverse the arcs on an arc list. */
+ length += strlen (object_directory) + 2;
+ name = xmalloc (length);
+ name[0] = 0;
-static struct adj_list *
-reverse_arcs (arcptr)
- struct adj_list *arcptr;
-{
- struct adj_list *prev = 0;
- struct adj_list *next;
+ base = !stat (object_directory, &status) && S_ISDIR (status.st_mode);
+ strcat (name, object_directory);
+ if (base && name[strlen (name) - 1] != '/')
+ strcat (name, "/");
+ }
+ else
+ {
+ name = xmalloc (length + 1);
+ name[0] = 0;
+ base = 1;
+ }
- for ( ; arcptr; arcptr = next)
+ if (base)
{
- next = arcptr->succ_next;
- arcptr->succ_next = prev;
- prev = arcptr;
+ /* Append source file name. */
+ cptr = strrchr (file_name, '/');
+ strcat (name, cptr ? cptr + 1 : file_name);
}
- return prev;
-}
+ /* Remove the extension. */
+ cptr = strrchr (name, '.');
+ if (cptr)
+ *cptr = 0;
+ length = strlen (name);
+
+ bbg_file_name = xmalloc (length + strlen (GCOV_NOTE_SUFFIX) + 1);
+ strcpy (bbg_file_name, name);
+ strcpy (bbg_file_name + length, GCOV_NOTE_SUFFIX);
-/* Construct the program flow graph from the .bbg file, and read in the data
- in the .da file. */
+ da_file_name = xmalloc (length + strlen (GCOV_DATA_SUFFIX) + 1);
+ strcpy (da_file_name, name);
+ strcpy (da_file_name + length, GCOV_DATA_SUFFIX);
-static void
-create_program_flow_graph (bptr)
- struct bb_info_list *bptr;
+ return;
+}
+
+/* Find or create a source file structure for FILE_NAME. Copies
+ FILE_NAME on creation */
+
+static source_t *
+find_source (const char *file_name)
{
- long num_blocks, number_arcs, src, dest, flag_bits, num_arcs_per_block;
- int i;
- struct adj_list *arcptr;
- struct bb_info *bb_graph;
+ source_t *src;
- /* Read the number of blocks. */
- __read_long (&num_blocks, bbg_file, 4);
+ if (!file_name)
+ file_name = "<unknown>";
- /* Create an array of size bb number of bb_info structs. */
- bb_graph = (struct bb_info *) xcalloc (num_blocks, sizeof (struct bb_info));
+ for (src = sources; src; src = src->next)
+ if (!strcmp (file_name, src->name))
+ return src;
- bptr->bb_graph = bb_graph;
- bptr->num_blocks = num_blocks;
+ src = xcalloc (1, sizeof (source_t));
+ src->name = xstrdup (file_name);
+ src->coverage.name = src->name;
+ src->index = sources ? sources->index + 1 : 1;
+ src->next = sources;
+ sources = src;
- /* Read and create each arc from the .bbg file. */
- __read_long (&number_arcs, bbg_file, 4);
- for (i = 0; i < num_blocks; i++)
- {
- int j;
+ return src;
+}
- __read_long (&num_arcs_per_block, bbg_file, 4);
- for (j = 0; j < num_arcs_per_block; j++)
- {
- if (number_arcs-- < 0)
- abort ();
+/* Read the graph file. Return nonzero on fatal error. */
- src = i;
- __read_long (&dest, bbg_file, 4);
+static int
+read_graph_file (void)
+{
+ unsigned version;
+ unsigned current_tag = 0;
+ struct function_info *fn = NULL;
+ source_t *src = NULL;
+ unsigned ix;
+ unsigned tag;
+
+ if (!gcov_open (bbg_file_name, 1))
+ {
+ fnotice (stderr, "%s:cannot open graph file\n", bbg_file_name);
+ return 1;
+ }
+ bbg_file_time = gcov_time ();
+ if (!gcov_magic (gcov_read_unsigned (), GCOV_NOTE_MAGIC))
+ {
+ fnotice (stderr, "%s:not a gcov graph file\n", bbg_file_name);
+ gcov_close ();
+ return 1;
+ }
+
+ version = gcov_read_unsigned ();
+ if (version != GCOV_VERSION)
+ {
+ char v[4], e[4];
- arcptr = (struct adj_list *) xmalloc (sizeof (struct adj_list));
- init_arc (arcptr, src, dest, bb_graph);
+ GCOV_UNSIGNED2STRING (v, version);
+ GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
- __read_long (&flag_bits, bbg_file, 4);
- arcptr->on_tree = flag_bits & 0x1;
- arcptr->fake = !! (flag_bits & 0x2);
- arcptr->fall_through = !! (flag_bits & 0x4);
- }
+ fnotice (stderr, "%s:version '%.4s', prefer '%.4s'\n",
+ bbg_file_name, v, e);
}
+ bbg_stamp = gcov_read_unsigned ();
- if (number_arcs)
- abort ();
+ while ((tag = gcov_read_unsigned ()))
+ {
+ unsigned length = gcov_read_unsigned ();
+ gcov_position_t base = gcov_position ();
- /* Read and ignore the -1 separating the arc list from the arc list of the
- next function. */
- __read_long (&src, bbg_file, 4);
- if (src != -1)
- abort ();
+ if (tag == GCOV_TAG_FUNCTION)
+ {
+ char *function_name;
+ unsigned ident, checksum, lineno;
+ source_t *src;
+ function_t *probe, *prev;
+
+ ident = gcov_read_unsigned ();
+ checksum = gcov_read_unsigned ();
+ function_name = xstrdup (gcov_read_string ());
+ src = find_source (gcov_read_string ());
+ lineno = gcov_read_unsigned ();
+
+ fn = xcalloc (1, sizeof (function_t));
+ fn->name = function_name;
+ fn->ident = ident;
+ fn->checksum = checksum;
+ fn->src = src;
+ fn->line = lineno;
+
+ fn->next = functions;
+ functions = fn;
+ current_tag = tag;
+
+ if (lineno >= src->num_lines)
+ src->num_lines = lineno + 1;
+ /* Now insert it into the source file's list of
+ functions. Normally functions will be encountered in
+ ascending order, so a simple scan is quick. */
+ for (probe = src->functions, prev = NULL;
+ probe && probe->line > lineno;
+ prev = probe, probe = probe->line_next)
+ continue;
+ fn->line_next = probe;
+ if (prev)
+ prev->line_next = fn;
+ else
+ src->functions = fn;
+ }
+ else if (fn && tag == GCOV_TAG_BLOCKS)
+ {
+ if (fn->blocks)
+ fnotice (stderr, "%s:already seen blocks for '%s'\n",
+ bbg_file_name, fn->name);
+ else
+ {
+ unsigned ix, num_blocks = GCOV_TAG_BLOCKS_NUM (length);
+ fn->num_blocks = num_blocks;
- /* Must reverse the order of all succ arcs, to ensure that they match
- the order of the data in the .da file. */
+ fn->blocks = xcalloc (fn->num_blocks, sizeof (block_t));
+ for (ix = 0; ix != num_blocks; ix++)
+ fn->blocks[ix].flags = gcov_read_unsigned ();
+ }
+ }
+ else if (fn && tag == GCOV_TAG_ARCS)
+ {
+ unsigned src = gcov_read_unsigned ();
+ unsigned num_dests = GCOV_TAG_ARCS_NUM (length);
- for (i = 0; i < num_blocks; i++)
- if (bb_graph[i].succ)
- bb_graph[i].succ = reverse_arcs (bb_graph[i].succ);
+ if (src >= fn->num_blocks || fn->blocks[src].succ)
+ goto corrupt;
- /* For each arc not on the spanning tree, set its execution count from
- the .da file. */
+ while (num_dests--)
+ {
+ struct arc_info *arc;
+ unsigned dest = gcov_read_unsigned ();
+ unsigned flags = gcov_read_unsigned ();
- /* The first count in the .da file is the number of times that the function
- was entered. This is the exec_count for block zero. */
+ if (dest >= fn->num_blocks)
+ goto corrupt;
+ arc = xcalloc (1, sizeof (arc_t));
- /* This duplicates code in branch_prob in profile.c. */
+ arc->dst = &fn->blocks[dest];
+ arc->src = &fn->blocks[src];
- for (i = 0; i < num_blocks; i++)
- for (arcptr = bb_graph[i].succ; arcptr; arcptr = arcptr->succ_next)
- if (! arcptr->on_tree)
- {
- gcov_type tmp_count = 0;
- if (da_file && __read_gcov_type (&tmp_count, da_file, 8))
- abort();
-
- arcptr->arc_count = tmp_count;
- arcptr->count_valid = 1;
- bb_graph[i].succ_count--;
- bb_graph[arcptr->target].pred_count--;
- }
-}
+ arc->count = 0;
+ arc->count_valid = 0;
+ arc->on_tree = !!(flags & GCOV_ARC_ON_TREE);
+ arc->fake = !!(flags & GCOV_ARC_FAKE);
+ arc->fall_through = !!(flags & GCOV_ARC_FALLTHROUGH);
-static void
-solve_program_flow_graph (bptr)
- struct bb_info_list *bptr;
-{
- int passes, changes;
- gcov_type total;
- int i;
- struct adj_list *arcptr;
- struct bb_info *bb_graph;
- int num_blocks;
-
- num_blocks = bptr->num_blocks;
- bb_graph = bptr->bb_graph;
-
- /* For every block in the file,
- - if every exit/entrance arc has a known count, then set the block count
- - if the block count is known, and every exit/entrance arc but one has
- a known execution count, then set the count of the remaining arc
-
- As arc counts are set, decrement the succ/pred count, but don't delete
- the arc, that way we can easily tell when all arcs are known, or only
- one arc is unknown. */
-
- /* The order that the basic blocks are iterated through is important.
- Since the code that finds spanning trees starts with block 0, low numbered
- arcs are put on the spanning tree in preference to high numbered arcs.
- Hence, most instrumented arcs are at the end. Graph solving works much
- faster if we propagate numbers from the end to the start.
-
- This takes an average of slightly more than 3 passes. */
-
- changes = 1;
- passes = 0;
- while (changes)
- {
- passes++;
- changes = 0;
+ arc->succ_next = fn->blocks[src].succ;
+ fn->blocks[src].succ = arc;
+ fn->blocks[src].num_succ++;
- for (i = num_blocks - 1; i >= 0; i--)
- {
- if (! bb_graph[i].count_valid)
- {
- if (bb_graph[i].succ_count == 0)
- {
- total = 0;
- for (arcptr = bb_graph[i].succ; arcptr;
- arcptr = arcptr->succ_next)
- total += arcptr->arc_count;
- bb_graph[i].exec_count = total;
- bb_graph[i].count_valid = 1;
- changes = 1;
- }
- else if (bb_graph[i].pred_count == 0)
+ arc->pred_next = fn->blocks[dest].pred;
+ fn->blocks[dest].pred = arc;
+ fn->blocks[dest].num_pred++;
+
+ if (arc->fake)
{
- total = 0;
- for (arcptr = bb_graph[i].pred; arcptr;
- arcptr = arcptr->pred_next)
- total += arcptr->arc_count;
- bb_graph[i].exec_count = total;
- bb_graph[i].count_valid = 1;
- changes = 1;
+ if (src)
+ {
+ /* Exceptional exit from this function, the
+ source block must be a call. */
+ fn->blocks[src].is_call_site = 1;
+ arc->is_call_non_return = 1;
+ }
+ else
+ {
+ /* Non-local return from a callee of this
+ function. The destination block is a catch or
+ setjmp. */
+ arc->is_nonlocal_return = 1;
+ fn->blocks[dest].is_nonlocal_return = 1;
+ }
}
+
+ if (!arc->on_tree)
+ fn->num_counts++;
}
- if (bb_graph[i].count_valid)
+ }
+ else if (fn && tag == GCOV_TAG_LINES)
+ {
+ unsigned blockno = gcov_read_unsigned ();
+ unsigned *line_nos = xcalloc (length - 1, sizeof (unsigned));
+
+ if (blockno >= fn->num_blocks || fn->blocks[blockno].u.line.encoding)
+ goto corrupt;
+
+ for (ix = 0; ; )
{
- if (bb_graph[i].succ_count == 1)
+ unsigned lineno = gcov_read_unsigned ();
+
+ if (lineno)
{
- total = 0;
- /* One of the counts will be invalid, but it is zero,
- so adding it in also doesn't hurt. */
- for (arcptr = bb_graph[i].succ; arcptr;
- arcptr = arcptr->succ_next)
- total += arcptr->arc_count;
- /* Calculate count for remaining arc by conservation. */
- total = bb_graph[i].exec_count - total;
- /* Search for the invalid arc, and set its count. */
- for (arcptr = bb_graph[i].succ; arcptr;
- arcptr = arcptr->succ_next)
- if (! arcptr->count_valid)
- break;
- if (! arcptr)
- abort ();
- arcptr->count_valid = 1;
- arcptr->arc_count = total;
- bb_graph[i].succ_count--;
-
- bb_graph[arcptr->target].pred_count--;
- changes = 1;
+ if (!ix)
+ {
+ line_nos[ix++] = 0;
+ line_nos[ix++] = src->index;
+ }
+ line_nos[ix++] = lineno;
+ if (lineno >= src->num_lines)
+ src->num_lines = lineno + 1;
}
- if (bb_graph[i].pred_count == 1)
+ else
{
- total = 0;
- /* One of the counts will be invalid, but it is zero,
- so adding it in also doesn't hurt. */
- for (arcptr = bb_graph[i].pred; arcptr;
- arcptr = arcptr->pred_next)
- total += arcptr->arc_count;
- /* Calculate count for remaining arc by conservation. */
- total = bb_graph[i].exec_count - total;
- /* Search for the invalid arc, and set its count. */
- for (arcptr = bb_graph[i].pred; arcptr;
- arcptr = arcptr->pred_next)
- if (! arcptr->count_valid)
- break;
- if (! arcptr)
- abort ();
- arcptr->count_valid = 1;
- arcptr->arc_count = total;
- bb_graph[i].pred_count--;
-
- bb_graph[arcptr->source].succ_count--;
- changes = 1;
+ const char *file_name = gcov_read_string ();
+
+ if (!file_name)
+ break;
+ src = find_source (file_name);
+
+ line_nos[ix++] = 0;
+ line_nos[ix++] = src->index;
}
}
+
+ fn->blocks[blockno].u.line.encoding = line_nos;
+ fn->blocks[blockno].u.line.num = ix;
+ }
+ else if (current_tag && !GCOV_TAG_IS_SUBTAG (current_tag, tag))
+ {
+ fn = NULL;
+ current_tag = 0;
+ }
+ gcov_sync (base, length);
+ if (gcov_is_error ())
+ {
+ corrupt:;
+ fnotice (stderr, "%s:corrupted\n", bbg_file_name);
+ gcov_close ();
+ return 1;
}
}
+ gcov_close ();
- /* If the graph has been correctly solved, every block will have a
- succ and pred count of zero. */
- for (i = 0; i < num_blocks; i++)
- if (bb_graph[i].succ_count || bb_graph[i].pred_count)
- abort ();
-}
+ /* We built everything backwards, so nreverse them all. */
+ /* Reverse sources. Not strictly necessary, but we'll then process
+ them in the 'expected' order. */
+ {
+ source_t *src, *src_p, *src_n;
-static void
-read_files ()
-{
- struct stat buf;
- struct bb_info_list *list_end = 0;
- struct bb_info_list *b_ptr;
- long total;
+ for (src_p = NULL, src = sources; src; src_p = src, src = src_n)
+ {
+ src_n = src->next;
+ src->next = src_p;
+ }
+ sources = src_p;
+ }
- /* Read and ignore the first word of the .da file, which is the count of
- how many numbers follow. */
- if (da_file && __read_long (&total, da_file, 8))
- abort();
+ /* Reverse functions. */
+ {
+ function_t *fn, *fn_p, *fn_n;
- while (! feof (bbg_file))
- {
- b_ptr = (struct bb_info_list *) xmalloc (sizeof (struct bb_info_list));
+ for (fn_p = NULL, fn = functions; fn; fn_p = fn, fn = fn_n)
+ {
+ unsigned ix;
- b_ptr->next = 0;
- if (list_end)
- list_end->next = b_ptr;
- else
- bb_graph_list = b_ptr;
- list_end = b_ptr;
+ fn_n = fn->next;
+ fn->next = fn_p;
- /* Read in the data in the .bbg file and reconstruct the program flow
- graph for one function. */
- create_program_flow_graph (b_ptr);
+ /* Reverse the arcs. */
+ for (ix = fn->num_blocks; ix--;)
+ {
+ arc_t *arc, *arc_p, *arc_n;
- /* Set the EOF condition if at the end of file. */
- ungetc (getc (bbg_file), bbg_file);
- }
+ for (arc_p = NULL, arc = fn->blocks[ix].succ; arc;
+ arc_p = arc, arc = arc_n)
+ {
+ arc_n = arc->succ_next;
+ arc->succ_next = arc_p;
+ }
+ fn->blocks[ix].succ = arc_p;
- /* Check to make sure the .da file data is valid. */
+ for (arc_p = NULL, arc = fn->blocks[ix].pred; arc;
+ arc_p = arc, arc = arc_n)
+ {
+ arc_n = arc->pred_next;
+ arc->pred_next = arc_p;
+ }
+ fn->blocks[ix].pred = arc_p;
+ }
+ }
+ functions = fn_p;
+ }
+ return 0;
+}
+
+/* Reads profiles from the count file and attach to each
+ function. Return nonzero if fatal error. */
+
+static int
+read_count_file (void)
+{
+ unsigned ix;
+ unsigned version;
+ unsigned tag;
+ function_t *fn = NULL;
+ int error = 0;
- if (da_file)
+ if (!gcov_open (da_file_name, 1))
{
- if (feof (da_file))
- fnotice (stderr, ".da file contents exhausted too early\n");
- /* Should be at end of file now. */
- if (__read_long (&total, da_file, 8) == 0)
- fnotice (stderr, ".da file contents not exhausted\n");
+ fnotice (stderr, "%s:cannot open data file\n", da_file_name);
+ return 1;
}
+ if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC))
+ {
+ fnotice (stderr, "%s:not a gcov data file\n", da_file_name);
+ cleanup:;
+ gcov_close ();
+ return 1;
+ }
+ version = gcov_read_unsigned ();
+ if (version != GCOV_VERSION)
+ {
+ char v[4], e[4];
- /* Calculate all of the basic block execution counts and branch
- taken probabilities. */
+ GCOV_UNSIGNED2STRING (v, version);
+ GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
+
+ fnotice (stderr, "%s:version '%.4s', prefer version '%.4s'\n",
+ da_file_name, v, e);
+ }
+ tag = gcov_read_unsigned ();
+ if (tag != bbg_stamp)
+ {
+ fnotice (stderr, "%s:stamp mismatch with graph file\n", da_file_name);
+ goto cleanup;
+ }
- for (b_ptr = bb_graph_list; b_ptr; b_ptr = b_ptr->next)
- solve_program_flow_graph (b_ptr);
+ while ((tag = gcov_read_unsigned ()))
+ {
+ unsigned length = gcov_read_unsigned ();
+ unsigned long base = gcov_position ();
+
+ if (tag == GCOV_TAG_OBJECT_SUMMARY)
+ gcov_read_summary (&object_summary);
+ else if (tag == GCOV_TAG_PROGRAM_SUMMARY)
+ program_count++;
+ else if (tag == GCOV_TAG_FUNCTION)
+ {
+ unsigned ident = gcov_read_unsigned ();
+ struct function_info *fn_n = functions;
- /* Read in all of the data from the .bb file. This info will be accessed
- sequentially twice. */
- stat (bb_file_name, &buf);
- bb_data_size = buf.st_size / 4;
+ for (fn = fn ? fn->next : NULL; ; fn = fn->next)
+ {
+ if (fn)
+ ;
+ else if ((fn = fn_n))
+ fn_n = NULL;
+ else
+ {
+ fnotice (stderr, "%s:unknown function '%u'\n",
+ da_file_name, ident);
+ break;
+ }
+ if (fn->ident == ident)
+ break;
+ }
- bb_data = (char *) xmalloc ((unsigned) buf.st_size);
- fread (bb_data, sizeof (char), buf.st_size, bb_file);
+ if (!fn)
+ ;
+ else if (gcov_read_unsigned () != fn->checksum)
+ {
+ mismatch:;
+ fnotice (stderr, "%s:profile mismatch for '%s'\n",
+ da_file_name, fn->name);
+ goto cleanup;
+ }
+ }
+ else if (tag == GCOV_TAG_FOR_COUNTER (GCOV_COUNTER_ARCS) && fn)
+ {
+ if (length != GCOV_TAG_COUNTER_LENGTH (fn->num_counts))
+ goto mismatch;
- fclose (bb_file);
- if (da_file)
- fclose (da_file);
- fclose (bbg_file);
-}
+ if (!fn->counts)
+ fn->counts = xcalloc (fn->num_counts, sizeof (gcov_type));
+
+ for (ix = 0; ix != fn->num_counts; ix++)
+ fn->counts[ix] += gcov_read_counter ();
+ }
+ gcov_sync (base, length);
+ if ((error = gcov_is_error ()))
+ {
+ fnotice (stderr, error < 0 ? "%s:overflowed\n" : "%s:corrupted\n",
+ da_file_name);
+ goto cleanup;
+ }
+ }
+ gcov_close ();
+ return 0;
+}
-/* Scan the data in the .bb file to find all source files referenced,
- and the largest line number mentioned in each one. */
+/* Solve the flow graph. Propagate counts from the instrumented arcs
+ to the blocks and the uninstrumented arcs. */
static void
-scan_for_source_files ()
+solve_flow_graph (function_t *fn)
{
- struct sourcefile *s_ptr = NULL;
- char *ptr;
- long count;
- long line_num;
-
- /* Search the bb_data to find:
- 1) The number of sources files contained herein, and
- 2) The largest line number for each source file. */
-
- ptr = bb_data;
- sources = 0;
- for (count = 0; count < bb_data_size; count++)
+ unsigned ix;
+ arc_t *arc;
+ gcov_type *count_ptr = fn->counts;
+ block_t *blk;
+ block_t *valid_blocks = NULL; /* valid, but unpropagated blocks. */
+ block_t *invalid_blocks = NULL; /* invalid, but inferable blocks. */
+
+ if (fn->num_blocks < 2)
+ fnotice (stderr, "%s:'%s' lacks entry and/or exit blocks\n",
+ bbg_file_name, fn->name);
+ else
{
- __fetch_long (&line_num, ptr, 4);
- ptr += 4;
- if (line_num == -1)
+ if (fn->blocks[0].num_pred)
+ fnotice (stderr, "%s:'%s' has arcs to entry block\n",
+ bbg_file_name, fn->name);
+ else
+ /* We can't deduce the entry block counts from the lack of
+ predecessors. */
+ fn->blocks[0].num_pred = ~(unsigned)0;
+
+ if (fn->blocks[fn->num_blocks - 1].num_succ)
+ fnotice (stderr, "%s:'%s' has arcs from exit block\n",
+ bbg_file_name, fn->name);
+ else
+ /* Likewise, we can't deduce exit block counts from the lack
+ of its successors. */
+ fn->blocks[fn->num_blocks - 1].num_succ = ~(unsigned)0;
+ }
+
+ /* Propagate the measured counts, this must be done in the same
+ order as the code in profile.c */
+ for (ix = 0, blk = fn->blocks; ix != fn->num_blocks; ix++, blk++)
+ {
+ block_t const *prev_dst = NULL;
+ int out_of_order = 0;
+ int non_fake_succ = 0;
+
+ for (arc = blk->succ; arc; arc = arc->succ_next)
{
- /* A source file name follows. Check to see if we already have
- a sourcefile structure for this file. */
- s_ptr = sources;
- while (s_ptr && strcmp (s_ptr->name, ptr))
- s_ptr = s_ptr->next;
+ if (!arc->fake)
+ non_fake_succ++;
- if (s_ptr == 0)
+ if (!arc->on_tree)
{
- /* No sourcefile structure for this file name exists, create
- a new one, and append it to the front of the sources list. */
- s_ptr = (struct sourcefile *) xmalloc (sizeof(struct sourcefile));
- s_ptr->name = xstrdup (ptr);
- s_ptr->maxlineno = 0;
- s_ptr->next = sources;
- sources = s_ptr;
+ if (count_ptr)
+ arc->count = *count_ptr++;
+ arc->count_valid = 1;
+ blk->num_succ--;
+ arc->dst->num_pred--;
}
-
- /* Scan past the file name. */
- {
- long delim;
- do {
- count++;
- __fetch_long (&delim, ptr, 4);
- ptr += 4;
- } while (delim != line_num);
- }
+ if (prev_dst && prev_dst > arc->dst)
+ out_of_order = 1;
+ prev_dst = arc->dst;
}
- else if (line_num == -2)
+ if (non_fake_succ == 1)
{
- long delim;
-
- /* A function name follows. Ignore it. */
- do {
- count++;
- __fetch_long (&delim, ptr, 4);
- ptr += 4;
- } while (delim != line_num);
+ /* If there is only one non-fake exit, it is an
+ unconditional branch. */
+ for (arc = blk->succ; arc; arc = arc->succ_next)
+ if (!arc->fake)
+ {
+ arc->is_unconditional = 1;
+ /* If this block is instrumenting a call, it might be
+ an artificial block. It is not artificial if it has
+ a non-fallthrough exit, or the destination of this
+ arc has more than one entry. Mark the destination
+ block as a return site, if none of those conditions
+ hold. */
+ if (blk->is_call_site && arc->fall_through
+ && arc->dst->pred == arc && !arc->pred_next)
+ arc->dst->is_call_return = 1;
+ }
}
- /* There will be a zero before the first file name, in which case s_ptr
- will still be uninitialized. So, only try to set the maxlineno
- field if line_num is non-zero. */
- else if (line_num > 0)
+
+ /* Sort the successor arcs into ascending dst order. profile.c
+ normally produces arcs in the right order, but sometimes with
+ one or two out of order. We're not using a particularly
+ smart sort. */
+ if (out_of_order)
{
- if (s_ptr->maxlineno <= line_num)
- s_ptr->maxlineno = line_num + 1;
+ arc_t *start = blk->succ;
+ unsigned changes = 1;
+
+ while (changes)
+ {
+ arc_t *arc, *arc_p, *arc_n;
+
+ changes = 0;
+ for (arc_p = NULL, arc = start; (arc_n = arc->succ_next);)
+ {
+ if (arc->dst > arc_n->dst)
+ {
+ changes = 1;
+ if (arc_p)
+ arc_p->succ_next = arc_n;
+ else
+ start = arc_n;
+ arc->succ_next = arc_n->succ_next;
+ arc_n->succ_next = arc;
+ arc_p = arc_n;
+ }
+ else
+ {
+ arc_p = arc;
+ arc = arc_n;
+ }
+ }
+ }
+ blk->succ = start;
}
- else if (line_num < 0)
+
+ /* Place it on the invalid chain, it will be ignored if that's
+ wrong. */
+ blk->invalid_chain = 1;
+ blk->chain = invalid_blocks;
+ invalid_blocks = blk;
+ }
+
+ while (invalid_blocks || valid_blocks)
+ {
+ while ((blk = invalid_blocks))
{
- /* Don't know what this is, but it's garbage. */
- abort();
+ gcov_type total = 0;
+ const arc_t *arc;
+
+ invalid_blocks = blk->chain;
+ blk->invalid_chain = 0;
+ if (!blk->num_succ)
+ for (arc = blk->succ; arc; arc = arc->succ_next)
+ total += arc->count;
+ else if (!blk->num_pred)
+ for (arc = blk->pred; arc; arc = arc->pred_next)
+ total += arc->count;
+ else
+ continue;
+
+ blk->count = total;
+ blk->count_valid = 1;
+ blk->chain = valid_blocks;
+ blk->valid_chain = 1;
+ valid_blocks = blk;
+ }
+ while ((blk = valid_blocks))
+ {
+ gcov_type total;
+ arc_t *arc, *inv_arc;
+
+ valid_blocks = blk->chain;
+ blk->valid_chain = 0;
+ if (blk->num_succ == 1)
+ {
+ block_t *dst;
+
+ total = blk->count;
+ inv_arc = NULL;
+ for (arc = blk->succ; arc; arc = arc->succ_next)
+ {
+ total -= arc->count;
+ if (!arc->count_valid)
+ inv_arc = arc;
+ }
+ dst = inv_arc->dst;
+ inv_arc->count_valid = 1;
+ inv_arc->count = total;
+ blk->num_succ--;
+ dst->num_pred--;
+ if (dst->count_valid)
+ {
+ if (dst->num_pred == 1 && !dst->valid_chain)
+ {
+ dst->chain = valid_blocks;
+ dst->valid_chain = 1;
+ valid_blocks = dst;
+ }
+ }
+ else
+ {
+ if (!dst->num_pred && !dst->invalid_chain)
+ {
+ dst->chain = invalid_blocks;
+ dst->invalid_chain = 1;
+ invalid_blocks = dst;
+ }
+ }
+ }
+ if (blk->num_pred == 1)
+ {
+ block_t *src;
+
+ total = blk->count;
+ inv_arc = NULL;
+ for (arc = blk->pred; arc; arc = arc->pred_next)
+ {
+ total -= arc->count;
+ if (!arc->count_valid)
+ inv_arc = arc;
+ }
+ src = inv_arc->src;
+ inv_arc->count_valid = 1;
+ inv_arc->count = total;
+ blk->num_pred--;
+ src->num_succ--;
+ if (src->count_valid)
+ {
+ if (src->num_succ == 1 && !src->valid_chain)
+ {
+ src->chain = valid_blocks;
+ src->valid_chain = 1;
+ valid_blocks = src;
+ }
+ }
+ else
+ {
+ if (!src->num_succ && !src->invalid_chain)
+ {
+ src->chain = invalid_blocks;
+ src->invalid_chain = 1;
+ invalid_blocks = src;
+ }
+ }
+ }
}
}
+
+ /* If the graph has been correctly solved, every block will have a
+ valid count. */
+ for (ix = 0; ix < fn->num_blocks; ix++)
+ if (!fn->blocks[ix].count_valid)
+ {
+ fnotice (stderr, "%s:graph is unsolvable for '%s'\n",
+ bbg_file_name, fn->name);
+ break;
+ }
}
-\f
-/* For calculating coverage at the function level. */
-static int function_source_lines;
-static int function_source_lines_executed;
-static int function_branches;
-static int function_branches_executed;
-static int function_branches_taken;
-static int function_calls;
-static int function_calls_executed;
-static char *function_name;
+\f
-/* Calculate the branch taken probabilities for all arcs branches at the
- end of this block. */
+/* Increment totals in COVERAGE according to arc ARC. */
static void
-calculate_branch_probs (current_graph, block_num, branch_probs, last_line_num)
- struct bb_info_list *current_graph;
- int block_num;
- struct arcdata **branch_probs;
- int last_line_num;
+add_branch_counts (coverage_t *coverage, const arc_t *arc)
{
- gcov_type total;
- struct adj_list *arcptr;
- struct arcdata *end_ptr, *a_ptr;
-
- total = current_graph->bb_graph[block_num].exec_count;
- for (arcptr = current_graph->bb_graph[block_num].succ; arcptr;
- arcptr = arcptr->succ_next)
+ if (arc->is_call_non_return)
+ {
+ coverage->calls++;
+ if (arc->src->count)
+ coverage->calls_executed++;
+ }
+ else if (!arc->is_unconditional)
{
- /* Ignore fall through arcs as they aren't really branches. */
+ coverage->branches++;
+ if (arc->src->count)
+ coverage->branches_executed++;
+ if (arc->count)
+ coverage->branches_taken++;
+ }
+}
- if (arcptr->fall_through)
- continue;
+/* Format a HOST_WIDE_INT as either a percent ratio, or absolute
+ count. If dp >= 0, format TOP/BOTTOM * 100 to DP decimal places.
+ If DP is zero, no decimal point is printed. Only print 100% when
+ TOP==BOTTOM and only print 0% when TOP=0. If dp < 0, then simply
+ format TOP. Return pointer to a static string. */
- a_ptr = (struct arcdata *) xmalloc (sizeof (struct arcdata));
- a_ptr->total = total;
- if (total == 0)
- a_ptr->hits = 0;
- else
- a_ptr->hits = arcptr->arc_count;
- a_ptr->call_insn = arcptr->fake;
+static char const *
+format_gcov (gcov_type top, gcov_type bottom, int dp)
+{
+ static char buffer[20];
- if (output_function_summary)
+ if (dp >= 0)
+ {
+ float ratio = bottom ? (float)top / bottom : 0;
+ int ix;
+ unsigned limit = 100;
+ unsigned percent;
+
+ for (ix = dp; ix--; )
+ limit *= 10;
+
+ percent = (unsigned) (ratio * limit + (float)0.5);
+ if (percent <= 0 && top)
+ percent = 1;
+ else if (percent >= limit && top != bottom)
+ percent = limit - 1;
+ ix = sprintf (buffer, "%.*u%%", dp + 1, percent);
+ if (dp)
{
- if (a_ptr->call_insn)
- {
- function_calls++;
- if (a_ptr->total != 0)
- function_calls_executed++;
- }
- else
+ dp++;
+ do
{
- function_branches++;
- if (a_ptr->total != 0)
- function_branches_executed++;
- if (a_ptr->hits > 0)
- function_branches_taken++;
+ buffer[ix+1] = buffer[ix];
+ ix--;
}
- }
-
- /* Append the new branch to the end of the list. */
- a_ptr->next = 0;
- if (! branch_probs[last_line_num])
- branch_probs[last_line_num] = a_ptr;
- else
- {
- end_ptr = branch_probs[last_line_num];
- while (end_ptr->next != 0)
- end_ptr = end_ptr->next;
- end_ptr->next = a_ptr;
+ while (dp--);
+ buffer[ix + 1] = '.';
}
}
+ else
+ sprintf (buffer, HOST_WIDEST_INT_PRINT_DEC, (HOST_WIDEST_INT)top);
+
+ return buffer;
}
+
/* Output summary info for a function. */
static void
-function_summary ()
+function_summary (const coverage_t *coverage, const char *title)
{
- if (function_source_lines)
- fnotice (stdout, "%6.2f%% of %d source lines executed in function %s\n",
- (((double) function_source_lines_executed / function_source_lines)
- * 100), function_source_lines, function_name);
+ fnotice (stdout, "%s '%s'\n", title, coverage->name);
+
+ if (coverage->lines)
+ fnotice (stdout, "Lines executed:%s of %d\n",
+ format_gcov (coverage->lines_executed, coverage->lines, 2),
+ coverage->lines);
else
- fnotice (stdout, "No executable source lines in function %s\n",
- function_name);
+ fnotice (stdout, "No executable lines\n");
- if (output_branch_probs)
+ if (flag_branches)
{
- if (function_branches)
+ if (coverage->branches)
{
- fnotice (stdout, "%6.2f%% of %d branches executed in function %s\n",
- (((double) function_branches_executed / function_branches)
- * 100), function_branches, function_name);
- fnotice (stdout,
- "%6.2f%% of %d branches taken at least once in function %s\n",
- (((double) function_branches_taken / function_branches)
- * 100), function_branches, function_name);
+ fnotice (stdout, "Branches executed:%s of %d\n",
+ format_gcov (coverage->branches_executed,
+ coverage->branches, 2),
+ coverage->branches);
+ fnotice (stdout, "Taken at least once:%s of %d\n",
+ format_gcov (coverage->branches_taken,
+ coverage->branches, 2),
+ coverage->branches);
}
else
- fnotice (stdout, "No branches in function %s\n", function_name);
- if (function_calls)
- fnotice (stdout, "%6.2f%% of %d calls executed in function %s\n",
- (((double) function_calls_executed / function_calls)
- * 100), function_calls, function_name);
+ fnotice (stdout, "No branches\n");
+ if (coverage->calls)
+ fnotice (stdout, "Calls executed:%s of %d\n",
+ format_gcov (coverage->calls_executed, coverage->calls, 2),
+ coverage->calls);
else
- fnotice (stdout, "No calls in function %s\n", function_name);
+ fnotice (stdout, "No calls\n");
}
}
-/* Calculate line execution counts, and output the data to a .tcov file. */
-
-static void
-output_data ()
+/* Generate an output file name. LONG_OUTPUT_NAMES and PRESERVE_PATHS
+ affect name generation. With preserve_paths we create a filename
+ from all path components of the source file, replacing '/' with
+ '#', without it we simply take the basename component. With
+ long_output_names we prepend the processed name of the input file
+ to each output name (except when the current source file is the
+ input file, so you don't get a double concatenation). The two
+ components are separated by '##'. Also '.' filename components are
+ removed and '..' components are renamed to '^'. */
+
+static char *
+make_gcov_file_name (const char *input_name, const char *src_name)
{
- /* When scanning data, this is true only if the data applies to the
- current source file. */
- int this_file;
- /* An array indexed by line number which indicates how many times that line
- was executed. */
- gcov_type *line_counts;
- /* An array indexed by line number which indicates whether the line was
- present in the bb file (i.e. whether it had code associate with it).
- Lines never executed are those which both exist, and have zero execution
- counts. */
- char *line_exists;
- /* An array indexed by line number, which contains a list of branch
- probabilities, one for each branch on that line. */
- struct arcdata **branch_probs = NULL;
- struct sourcefile *s_ptr;
- char *source_file_name;
- FILE *source_file;
- struct bb_info_list *current_graph;
- long count;
char *cptr;
- long block_num;
- long line_num;
- long last_line_num = 0;
- int i;
- struct arcdata *a_ptr;
- /* Buffer used for reading in lines from the source file. */
- char string[STRING_SIZE];
- /* For calculating coverage at the file level. */
- int total_source_lines;
- int total_source_lines_executed;
- int total_branches;
- int total_branches_executed;
- int total_branches_taken;
- int total_calls;
- int total_calls_executed;
-
- /* Now, for each source file, allocate an array big enough to hold a count
- for each line. Scan through the bb_data, and when the file name matches
- the current file name, then for each following line number, increment
- the line number execution count indicated by the execution count of
- the appropriate basic block. */
-
- for (s_ptr = sources; s_ptr; s_ptr = s_ptr->next)
+ char *name = xmalloc (strlen (src_name) + strlen (input_name) + 10);
+
+ name[0] = 0;
+ if (flag_long_names && strcmp (src_name, input_name))
+ {
+ /* Generate the input filename part. */
+ cptr = flag_preserve_paths ? NULL : strrchr (input_name, '/');
+ strcat (name, cptr ? cptr + 1 : input_name);
+ strcat (name, "##");
+ }
+
+ /* Generate the source filename part. */
+ cptr = flag_preserve_paths ? NULL : strrchr (src_name, '/');
+ strcat (name, cptr ? cptr + 1 : src_name);
+
+ if (flag_preserve_paths)
{
- /* If this is a relative file name, and an object directory has been
- specified, then make it relative to the object directory name. */
- if (! (*s_ptr->name == '/' || *s_ptr->name == DIR_SEPARATOR
- /* Check for disk name on MS-DOS-based systems. */
- || (DIR_SEPARATOR == '\\'
- && s_ptr->name[1] == ':'
- && (s_ptr->name[2] == DIR_SEPARATOR
- || s_ptr->name[2] == '/')))
- && object_directory != 0
- && *object_directory != '\0')
+ /* Convert '/' to '#', remove '/./', convert '/../' to '/^/' */
+ char *prev;
+
+ for (cptr = name; (cptr = strchr ((prev = cptr), '/'));)
{
- int objdir_count = strlen (object_directory);
- source_file_name = xmalloc (objdir_count + strlen (s_ptr->name) + 2);
- strcpy (source_file_name, object_directory);
- if (object_directory[objdir_count - 1] != '/')
- source_file_name[objdir_count++] = '/';
- strcpy (source_file_name + objdir_count, s_ptr->name);
+ unsigned shift = 0;
+
+ if (prev + 1 == cptr && prev[0] == '.')
+ {
+ /* Remove '.' */
+ shift = 2;
+ }
+ else if (prev + 2 == cptr && prev[0] == '.' && prev[1] == '.')
+ {
+ /* Convert '..' */
+ shift = 1;
+ prev[1] = '^';
+ }
+ else
+ *cptr++ = '#';
+ if (shift)
+ {
+ cptr = prev;
+ do
+ prev[0] = prev[shift];
+ while (*prev++);
+ }
}
- else
- source_file_name = s_ptr->name;
-
- line_counts = (gcov_type *) xcalloc (sizeof (gcov_type), s_ptr->maxlineno);
- line_exists = xcalloc (1, s_ptr->maxlineno);
- if (output_branch_probs)
- branch_probs = (struct arcdata **)
- xcalloc (sizeof (struct arcdata *), s_ptr->maxlineno);
-
- /* There will be a zero at the beginning of the bb info, before the
- first list of line numbers, so must initialize block_num to 0. */
- block_num = 0;
- this_file = 0;
- current_graph = 0;
- {
- /* Pointer into the bb_data, incremented while scanning the data. */
- char *ptr = bb_data;
- for (count = 0; count < bb_data_size; count++)
- {
- long delim;
+ }
- __fetch_long (&line_num, ptr, 4);
- ptr += 4;
- if (line_num == -1)
- {
- /* Marks the beginning of a file name. Check to see whether
- this is the filename we are currently collecting data for. */
-
- if (strcmp (s_ptr->name, ptr))
- this_file = 0;
- else
- this_file = 1;
-
- /* Scan past the file name. */
- do {
- count++;
- __fetch_long (&delim, ptr, 4);
- ptr += 4;
- } while (delim != line_num);
- }
- else if (line_num == -2)
- {
- /* Marks the start of a new function. Advance to the next
- program flow graph. */
-
- if (! current_graph)
- current_graph = bb_graph_list;
- else
- {
- if (block_num == current_graph->num_blocks - 1)
- /* Last block falls through to exit. */
- ;
- else if (block_num == current_graph->num_blocks - 2)
- {
- if (output_branch_probs && this_file)
- calculate_branch_probs (current_graph, block_num,
- branch_probs, last_line_num);
- }
- else
- {
- fnotice (stderr,
- "didn't use all bb entries of graph, function %s\n",
- function_name);
- fnotice (stderr, "block_num = %ld, num_blocks = %d\n",
- block_num, current_graph->num_blocks);
- }
-
- current_graph = current_graph->next;
- block_num = 0;
-
- if (output_function_summary && this_file)
- function_summary ();
- }
-
- if (output_function_summary)
- {
- function_source_lines = 0;
- function_source_lines_executed = 0;
- function_branches = 0;
- function_branches_executed = 0;
- function_branches_taken = 0;
- function_calls = 0;
- function_calls_executed = 0;
- }
-
- /* Save the function name for later use. */
- function_name = ptr;
-
- /* Scan past the file name. */
- do {
- count++;
- __fetch_long (&delim, ptr, 4);
- ptr += 4;
- } while (delim != line_num);
- }
- else if (line_num == 0)
- {
- /* Marks the end of a block. */
+ strcat (name, ".gcov");
+ return name;
+}
- if (block_num >= current_graph->num_blocks)
- {
- fnotice (stderr, "ERROR: too many basic blocks in .bb file %s\n",
- function_name);
- abort ();
- }
+/* Scan through the bb_data for each line in the block, increment
+ the line number execution count indicated by the execution count of
+ the appropriate basic block. */
- if (output_branch_probs && this_file)
- calculate_branch_probs (current_graph, block_num,
- branch_probs, last_line_num);
+static void
+add_line_counts (coverage_t *coverage, function_t *fn)
+{
+ unsigned ix;
+ line_t *line = NULL; /* This is propagated from one iteration to the
+ next. */
- block_num++;
- }
- else if (this_file)
+ /* Scan each basic block. */
+ for (ix = 0; ix != fn->num_blocks; ix++)
+ {
+ block_t *block = &fn->blocks[ix];
+ unsigned *encoding;
+ const source_t *src = NULL;
+ unsigned jx;
+
+ if (block->count && ix && ix + 1 != fn->num_blocks)
+ fn->blocks_executed++;
+ for (jx = 0, encoding = block->u.line.encoding;
+ jx != block->u.line.num; jx++, encoding++)
+ if (!*encoding)
+ {
+ unsigned src_n = *++encoding;
+
+ for (src = sources; src->index != src_n; src = src->next)
+ continue;
+ jx++;
+ }
+ else
+ {
+ line = &src->lines[*encoding];
+
+ if (coverage)
{
- if (output_function_summary)
- {
- if (line_exists[line_num] == 0)
- function_source_lines++;
- if (line_counts[line_num] == 0
- && current_graph->bb_graph[block_num].exec_count != 0)
- function_source_lines_executed++;
- }
-
- /* Accumulate execution data for this line number. */
-
- line_counts[line_num]
- += current_graph->bb_graph[block_num].exec_count;
- line_exists[line_num] = 1;
- last_line_num = line_num;
+ if (!line->exists)
+ coverage->lines++;
+ if (!line->count && block->count)
+ coverage->lines_executed++;
}
+ line->exists = 1;
+ line->count += block->count;
}
- }
+ free (block->u.line.encoding);
+ block->u.cycle.arc = NULL;
+ block->u.cycle.ident = ~0U;
- if (output_function_summary && this_file)
- function_summary ();
-
- /* Calculate summary test coverage statistics. */
-
- total_source_lines = 0;
- total_source_lines_executed = 0;
- total_branches = 0;
- total_branches_executed = 0;
- total_branches_taken = 0;
- total_calls = 0;
- total_calls_executed = 0;
-
- for (count = 1; count < s_ptr->maxlineno; count++)
+ if (!ix || ix + 1 == fn->num_blocks)
+ /* Entry or exit block */;
+ else if (flag_all_blocks)
{
- if (line_exists[count])
- {
- total_source_lines++;
- if (line_counts[count])
- total_source_lines_executed++;
- }
- if (output_branch_probs)
- {
- for (a_ptr = branch_probs[count]; a_ptr; a_ptr = a_ptr->next)
- {
- if (a_ptr->call_insn)
- {
- total_calls++;
- if (a_ptr->total != 0)
- total_calls_executed++;
- }
- else
- {
- total_branches++;
- if (a_ptr->total != 0)
- total_branches_executed++;
- if (a_ptr->hits > 0)
- total_branches_taken++;
- }
- }
- }
- }
+ line_t *block_line = line ? line : &fn->src->lines[fn->line];
- if (total_source_lines)
- fnotice (stdout,
- "%6.2f%% of %d source lines executed in file %s\n",
- (((double) total_source_lines_executed / total_source_lines)
- * 100), total_source_lines, source_file_name);
- else
- fnotice (stdout, "No executable source lines in file %s\n",
- source_file_name);
-
- if (output_branch_probs)
+ block->chain = block_line->u.blocks;
+ block_line->u.blocks = block;
+ }
+ else if (flag_branches)
{
- if (total_branches)
+ arc_t *arc;
+
+ for (arc = block->succ; arc; arc = arc->succ_next)
{
- fnotice (stdout, "%6.2f%% of %d branches executed in file %s\n",
- (((double) total_branches_executed / total_branches)
- * 100), total_branches, source_file_name);
- fnotice (stdout,
- "%6.2f%% of %d branches taken at least once in file %s\n",
- (((double) total_branches_taken / total_branches)
- * 100), total_branches, source_file_name);
+ arc->line_next = line->u.branches;
+ line->u.branches = arc;
+ if (coverage && !arc->is_unconditional)
+ add_branch_counts (coverage, arc);
}
- else
- fnotice (stdout, "No branches in file %s\n", source_file_name);
- if (total_calls)
- fnotice (stdout, "%6.2f%% of %d calls executed in file %s\n",
- (((double) total_calls_executed / total_calls)
- * 100), total_calls, source_file_name);
- else
- fnotice (stdout, "No calls in file %s\n", source_file_name);
}
+ }
+ if (!line)
+ fnotice (stderr, "%s:no lines for '%s'\n", bbg_file_name, fn->name);
+}
- if (output_gcov_file)
- {
- /* Now the statistics are ready. Read in the source file one line
- at a time, and output that line to the gcov file preceded by
- its execution count if non zero. */
+/* Accumulate the line counts of a file. */
- source_file = fopen (source_file_name, "r");
- if (source_file == NULL)
- {
- fnotice (stderr, "Could not open source file %s.\n",
- source_file_name);
- free (line_counts);
- free (line_exists);
- continue;
- }
+static void
+accumulate_line_counts (source_t *src)
+{
+ line_t *line;
+ function_t *fn, *fn_p, *fn_n;
+ unsigned ix;
- count = strlen (source_file_name);
- cptr = strrchr (s_ptr->name, '/');
- if (cptr)
- cptr = cptr + 1;
- else
- cptr = s_ptr->name;
- if (output_long_names && strcmp (cptr, input_file_name))
- {
- gcov_file_name = xmalloc (count + 7 + strlen (input_file_name));
+ /* Reverse the function order. */
+ for (fn = src->functions, fn_p = NULL; fn;
+ fn_p = fn, fn = fn_n)
+ {
+ fn_n = fn->line_next;
+ fn->line_next = fn_p;
+ }
+ src->functions = fn_p;
- cptr = strrchr (input_file_name, '/');
- if (cptr)
- strcpy (gcov_file_name, cptr + 1);
- else
- strcpy (gcov_file_name, input_file_name);
+ for (ix = src->num_lines, line = src->lines; ix--; line++)
+ {
+ if (!flag_all_blocks)
+ {
+ arc_t *arc, *arc_p, *arc_n;
- strcat (gcov_file_name, ".");
+ /* Total and reverse the branch information. */
+ for (arc = line->u.branches, arc_p = NULL; arc;
+ arc_p = arc, arc = arc_n)
+ {
+ arc_n = arc->line_next;
+ arc->line_next = arc_p;
- cptr = strrchr (source_file_name, '/');
- if (cptr)
- strcat (gcov_file_name, cptr + 1);
- else
- strcat (gcov_file_name, source_file_name);
+ add_branch_counts (&src->coverage, arc);
}
- else
+ line->u.branches = arc_p;
+ }
+ else if (line->u.blocks)
+ {
+ /* The user expects the line count to be the number of times
+ a line has been executed. Simply summing the block count
+ will give an artificially high number. The Right Thing
+ is to sum the entry counts to the graph of blocks on this
+ line, then find the elementary cycles of the local graph
+ and add the transition counts of those cycles. */
+ block_t *block, *block_p, *block_n;
+ gcov_type count = 0;
+
+ /* Reverse the block information. */
+ for (block = line->u.blocks, block_p = NULL; block;
+ block_p = block, block = block_n)
{
- gcov_file_name = xmalloc (count + 6);
- cptr = strrchr (source_file_name, '/');
- if (cptr)
- strcpy (gcov_file_name, cptr + 1);
- else
- strcpy (gcov_file_name, source_file_name);
+ block_n = block->chain;
+ block->chain = block_p;
+ block->u.cycle.ident = ix;
}
+ line->u.blocks = block_p;
- /* Don't strip off the ending for compatibility with tcov, since
- this results in confusion if there is more than one file with
- the same basename, e.g. tmp.c and tmp.h. */
- strcat (gcov_file_name, ".gcov");
+ /* Sum the entry arcs. */
+ for (block = line->u.blocks; block; block = block->chain)
+ {
+ arc_t *arc;
- gcov_file = fopen (gcov_file_name, "w");
+ for (arc = block->pred; arc; arc = arc->pred_next)
+ {
+ if (arc->src->u.cycle.ident != ix)
+ count += arc->count;
+ if (flag_branches)
+ add_branch_counts (&src->coverage, arc);
+ }
- if (gcov_file == NULL)
- {
- fnotice (stderr, "Could not open output file %s.\n",
- gcov_file_name);
- fclose (source_file);
- free (line_counts);
- free (line_exists);
- continue;
+ /* Initialize the cs_count. */
+ for (arc = block->succ; arc; arc = arc->succ_next)
+ arc->cs_count = arc->count;
}
- fnotice (stdout, "Creating %s.\n", gcov_file_name);
-
- for (count = 1; count < s_ptr->maxlineno; count++)
+ /* Find the loops. This uses the algorithm described in
+ Tiernan 'An Efficient Search Algorithm to Find the
+ Elementary Circuits of a Graph', CACM Dec 1970. We hold
+ the P array by having each block point to the arc that
+ connects to the previous block. The H array is implicitly
+ held because of the arc ordering, and the block's
+ previous arc pointer.
+
+ Although the algorithm is O(N^3) for highly connected
+ graphs, at worst we'll have O(N^2), as most blocks have
+ only one or two exits. Most graphs will be small.
+
+ For each loop we find, locate the arc with the smallest
+ transition count, and add that to the cumulative
+ count. Decrease flow over the cycle and remove the arc
+ from consideration. */
+ for (block = line->u.blocks; block; block = block->chain)
{
- char *retval;
- int len;
-
- retval = fgets (string, STRING_SIZE, source_file);
+ block_t *head = block;
+ arc_t *arc;
- /* For lines which don't exist in the .bb file, print nothing
- before the source line. For lines which exist but were never
- executed, print ###### before the source line. Otherwise,
- print the execution count before the source line. */
- /* There are 16 spaces of indentation added before the source
- line so that tabs won't be messed up. */
- if (line_exists[count])
+ next_vertex:;
+ arc = head->succ;
+ current_vertex:;
+ while (arc)
{
- if (line_counts[count])
+ block_t *dst = arc->dst;
+ if (/* Already used that arc. */
+ arc->cycle
+ /* Not to same graph, or before first vertex. */
+ || dst->u.cycle.ident != ix
+ /* Already in path. */
+ || dst->u.cycle.arc)
{
- char c[20];
- sprintf (c, HOST_WIDEST_INT_PRINT_DEC, (HOST_WIDEST_INT)line_counts[count]);
- fprintf (gcov_file, "%12s %s", c,
- string);
+ arc = arc->succ_next;
+ continue;
}
- else
- fprintf (gcov_file, " ###### %s", string);
- }
- else
- fprintf (gcov_file, "\t\t%s", string);
- /* In case the source file line is larger than our buffer, keep
- reading and outputting lines until we get a newline. */
- len = strlen (string);
- while ((len == 0 || string[strlen (string) - 1] != '\n')
- && retval != NULL)
- {
- retval = fgets (string, STRING_SIZE, source_file);
- fputs (string, gcov_file);
- }
-
- if (output_branch_probs)
- {
- for (i = 0, a_ptr = branch_probs[count]; a_ptr;
- a_ptr = a_ptr->next, i++)
+ if (dst == block)
{
- if (a_ptr->call_insn)
+ /* Found a closing arc. */
+ gcov_type cycle_count = arc->cs_count;
+ arc_t *cycle_arc = arc;
+ arc_t *probe_arc;
+
+ /* Locate the smallest arc count of the loop. */
+ for (dst = head; (probe_arc = dst->u.cycle.arc);
+ dst = probe_arc->src)
+ if (cycle_count > probe_arc->cs_count)
+ {
+ cycle_count = probe_arc->cs_count;
+ cycle_arc = probe_arc;
+ }
+
+ count += cycle_count;
+ cycle_arc->cycle = 1;
+
+ /* Remove the flow from the cycle. */
+ arc->cs_count -= cycle_count;
+ for (dst = head; (probe_arc = dst->u.cycle.arc);
+ dst = probe_arc->src)
+ probe_arc->cs_count -= cycle_count;
+
+ /* Unwind to the cyclic arc. */
+ while (head != cycle_arc->src)
{
- if (a_ptr->total == 0)
- fnotice (gcov_file, "call %d never executed\n", i);
- else
- {
- if (output_branch_counts)
- {
- char c[20];
- sprintf (c, HOST_WIDEST_INT_PRINT_DEC,
- a_ptr->total - a_ptr->hits);
- fnotice (gcov_file,
- "call %d returns = %s\n", i, c);
- }
- else
- {
- char c[20];
- sprintf (c, HOST_WIDEST_INT_PRINT_DEC,
- 100 - ((a_ptr->hits * 100)
- + (a_ptr->total >> 1))
- / a_ptr->total);
- fnotice (gcov_file,
- "call %d returns = %s%%\n", i, c);
- }
- }
+ arc = head->u.cycle.arc;
+ head->u.cycle.arc = NULL;
+ head = arc->src;
}
- else
- {
- if (a_ptr->total == 0)
- fnotice (gcov_file, "branch %d never executed\n",
- i);
- else
- {
- if (output_branch_counts)
- {
- char c[20];
- sprintf (c, HOST_WIDEST_INT_PRINT_DEC,
- a_ptr->hits);
- fnotice (gcov_file,
- "branch %d taken = %s\n", i, c);
- }
- else
- {
- char c[20];
- sprintf (c, HOST_WIDEST_INT_PRINT_DEC,
- ((a_ptr->hits * 100)
- + (a_ptr->total >> 1))
- / a_ptr->total);
- fnotice (gcov_file,
- "branch %d taken = %s%%\n", i, c);
- }
- }
- }
- }
- }
+ /* Move on. */
+ arc = arc->succ_next;
+ continue;
+ }
- /* Gracefully handle errors while reading the source file. */
- if (retval == NULL)
+ /* Add new block to chain. */
+ dst->u.cycle.arc = arc;
+ head = dst;
+ goto next_vertex;
+ }
+ /* We could not add another vertex to the path. Remove
+ the last vertex from the list. */
+ arc = head->u.cycle.arc;
+ if (arc)
{
- fnotice (stderr,
- "Unexpected EOF while reading source file %s.\n",
- source_file_name);
- break;
+ /* It was not the first vertex. Move onto next arc. */
+ head->u.cycle.arc = NULL;
+ head = arc->src;
+ arc = arc->succ_next;
+ goto current_vertex;
}
+ /* Mark this block as unusable. */
+ block->u.cycle.ident = ~0U;
}
- /* Handle all remaining source lines. There may be lines
- after the last line of code. */
+ line->count = count;
+ }
- {
- char *retval = fgets (string, STRING_SIZE, source_file);
- while (retval != NULL)
- {
- int len;
+ if (line->exists)
+ {
+ src->coverage.lines++;
+ if (line->count)
+ src->coverage.lines_executed++;
+ }
+ }
+}
- fprintf (gcov_file, "\t\t%s", string);
+/* Output information about ARC number IX. Returns nonzero if
+ anything is output. */
- /* In case the source file line is larger than our buffer, keep
- reading and outputting lines until we get a newline. */
- len = strlen (string);
- while ((len == 0 || string[strlen (string) - 1] != '\n')
- && retval != NULL)
- {
- retval = fgets (string, STRING_SIZE, source_file);
- fputs (string, gcov_file);
- }
+static int
+output_branch_count (FILE *gcov_file, int ix, const arc_t *arc)
+{
- retval = fgets (string, STRING_SIZE, source_file);
- }
- }
+ if (arc->is_call_non_return)
+ {
+ if (arc->src->count)
+ {
+ fnotice (gcov_file, "call %2d returned %s\n", ix,
+ format_gcov (arc->src->count - arc->count,
+ arc->src->count, -flag_counts));
+ }
+ else
+ fnotice (gcov_file, "call %2d never executed\n", ix);
+ }
+ else if (!arc->is_unconditional)
+ {
+ if (arc->src->count)
+ fnotice (gcov_file, "branch %2d taken %s%s\n", ix,
+ format_gcov (arc->count, arc->src->count, -flag_counts),
+ arc->fall_through ? " (fallthrough)" : "");
+ else
+ fnotice (gcov_file, "branch %2d never executed\n", ix);
+ }
+ else if (flag_unconditional && !arc->dst->is_call_return)
+ {
+ if (arc->src->count)
+ fnotice (gcov_file, "unconditional %2d taken %s\n", ix,
+ format_gcov (arc->count, arc->src->count, -flag_counts));
+ else
+ fnotice (gcov_file, "unconditional %2d never executed\n", ix);
+ }
+ else
+ return 0;
+ return 1;
+
+}
+
+/* Read in the source file one line at a time, and output that line to
+ the gcov file preceded by its execution count and other
+ information. */
+
+static void
+output_lines (FILE *gcov_file, const source_t *src)
+{
+ FILE *source_file;
+ unsigned line_num; /* current line number. */
+ const line_t *line; /* current line info ptr. */
+ char string[STRING_SIZE]; /* line buffer. */
+ char const *retval = ""; /* status of source file reading. */
+ function_t *fn = NULL;
+
+ fprintf (gcov_file, "%9s:%5d:Source:%s\n", "-", 0, src->name);
+ fprintf (gcov_file, "%9s:%5d:Graph:%s\n", "-", 0, bbg_file_name);
+ fprintf (gcov_file, "%9s:%5d:Data:%s\n", "-", 0, da_file_name);
+ fprintf (gcov_file, "%9s:%5d:Runs:%u\n", "-", 0,
+ object_summary.ctrs[GCOV_COUNTER_ARCS].runs);
+ fprintf (gcov_file, "%9s:%5d:Programs:%u\n", "-", 0, program_count);
+
+ source_file = fopen (src->name, "r");
+ if (!source_file)
+ {
+ fnotice (stderr, "%s:cannot open source file\n", src->name);
+ retval = NULL;
+ }
+ else
+ {
+ struct stat status;
+
+ if (!fstat (fileno (source_file), &status)
+ && status.st_mtime > bbg_file_time)
+ {
+ fnotice (stderr, "%s:source file is newer than graph file '%s'\n",
+ src->name, bbg_file_name);
+ fprintf (gcov_file, "%9s:%5d:Source is newer than graph\n",
+ "-", 0);
+ }
+ }
+
+ if (flag_branches)
+ fn = src->functions;
+
+ for (line_num = 1, line = &src->lines[line_num];
+ line_num < src->num_lines; line_num++, line++)
+ {
+ for (; fn && fn->line == line_num; fn = fn->line_next)
+ {
+ arc_t *arc = fn->blocks[fn->num_blocks - 1].pred;
+ gcov_type return_count = fn->blocks[fn->num_blocks - 1].count;
+
+ for (; arc; arc = arc->pred_next)
+ if (arc->fake)
+ return_count -= arc->count;
+
+ fprintf (gcov_file, "function %s", fn->name);
+ fprintf (gcov_file, " called %s",
+ format_gcov (fn->blocks[0].count, 0, -1));
+ fprintf (gcov_file, " returned %s",
+ format_gcov (return_count, fn->blocks[0].count, 0));
+ fprintf (gcov_file, " blocks executed %s",
+ format_gcov (fn->blocks_executed, fn->num_blocks - 2, 0));
+ fprintf (gcov_file, "\n");
+ }
+
+ /* For lines which don't exist in the .bb file, print '-' before
+ the source line. For lines which exist but were never
+ executed, print '#####' before the source line. Otherwise,
+ print the execution count before the source line. There are
+ 16 spaces of indentation added before the source line so that
+ tabs won't be messed up. */
+ fprintf (gcov_file, "%9s:%5u:",
+ !line->exists ? "-" : !line->count ? "#####"
+ : format_gcov (line->count, 0, -1), line_num);
+
+ if (retval)
+ {
+ /* Copy source line. */
+ do
+ {
+ retval = fgets (string, STRING_SIZE, source_file);
+ if (!retval)
+ break;
+ fputs (retval, gcov_file);
+ }
+ while (!retval[0] || retval[strlen (retval) - 1] != '\n');
+ }
+ if (!retval)
+ fputs ("/*EOF*/\n", gcov_file);
+
+ if (flag_all_blocks)
+ {
+ block_t *block;
+ arc_t *arc;
+ int ix, jx;
- fclose (source_file);
- fclose (gcov_file);
+ for (ix = jx = 0, block = line->u.blocks; block;
+ block = block->chain)
+ {
+ if (!block->is_call_return)
+ fprintf (gcov_file, "%9s:%5u-block %2d\n",
+ !line->exists ? "-" : !block->count ? "$$$$$"
+ : format_gcov (block->count, 0, -1),
+ line_num, ix++);
+ if (flag_branches)
+ for (arc = block->succ; arc; arc = arc->succ_next)
+ jx += output_branch_count (gcov_file, jx, arc);
+ }
}
+ else if (flag_branches)
+ {
+ int ix;
+ arc_t *arc;
- free (line_counts);
- free (line_exists);
+ for (ix = 0, arc = line->u.branches; arc; arc = arc->line_next)
+ ix += output_branch_count (gcov_file, ix, arc);
+ }
}
+
+ /* Handle all remaining source lines. There may be lines after the
+ last line of code. */
+ if (retval)
+ {
+ for (; (retval = fgets (string, STRING_SIZE, source_file)); line_num++)
+ {
+ fprintf (gcov_file, "%9s:%5u:%s", "-", line_num, retval);
+
+ while (!retval[0] || retval[strlen (retval) - 1] != '\n')
+ {
+ retval = fgets (string, STRING_SIZE, source_file);
+ if (!retval)
+ break;
+ fputs (retval, gcov_file);
+ }
+ }
+ }
+
+ if (source_file)
+ fclose (source_file);
}
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