[sysprof] utils: add symbol range support for binfile and elfparser

[Christian Hergert <chergert src gnome org>]

commit e39feeeeb05368f7407651ed1a45fb5695dc5dcd
Author: Christian Hergert <chergert redhat com>
Date:   Tue May 28 12:13:49 2019 -0700

    utils: add symbol range support for binfile and elfparser

 src/libsysprof/binfile.c   | 23 ++++++++++++++++++++++-
 src/libsysprof/binfile.h   | 24 ++++++++++++++----------
 src/libsysprof/elfparser.c | 12 +++++++++++-
 src/libsysprof/elfparser.h | 24 ++++++++++++++----------
 4 files changed, 61 insertions(+), 22 deletions(-)
---
diff --git a/src/libsysprof/binfile.c b/src/libsysprof/binfile.c
index 8a427a2..80fd4fa 100644
--- a/src/libsysprof/binfile.c
+++ b/src/libsysprof/binfile.c
@@ -519,7 +519,7 @@ bin_symbol_get_name (bin_file_t *file,
 }
 
 gulong
-bin_symbol_get_address (bin_file_t      *file,
+bin_symbol_get_address (bin_file_t         *file,
                         const bin_symbol_t *symbol)
 {
     if (file->undefined_name == (char *)symbol)
@@ -536,3 +536,24 @@ bin_symbol_get_address (bin_file_t      *file,
         return elf_parser_get_sym_address (elf, sym);
     }
 }
+
+void
+bin_symbol_get_address_range (bin_file_t         *file,
+                              const bin_symbol_t *symbol,
+                              gulong             *begin,
+                              gulong             *end)
+{
+    if (file->undefined_name == (char *)symbol)
+    {
+        *begin = 0;
+        *end = 0;
+    }
+    else
+    {
+        ElfParser *elf;
+        const ElfSym *sym;
+
+        sym = get_elf_sym (file, symbol, &elf);
+        elf_parser_get_sym_address_range (elf, sym, begin, end);
+    }
+}
diff --git a/src/libsysprof/binfile.h b/src/libsysprof/binfile.h
index 3776958..f02868c 100644
--- a/src/libsysprof/binfile.h
+++ b/src/libsysprof/binfile.h
@@ -32,15 +32,19 @@ typedef struct bin_symbol_t bin_symbol_t;
 
 /* Binary File */
 
-bin_file_t         *bin_file_new           (const char         *filename);
-void                bin_file_free          (bin_file_t         *bin_file);
-const bin_symbol_t *bin_file_lookup_symbol (bin_file_t         *bin_file,
-                                            gulong              address);
-gboolean            bin_file_check_inode   (bin_file_t         *bin_file,
-                                            ino_t               inode);
-const char         *bin_symbol_get_name    (bin_file_t         *bin_file,
-                                            const bin_symbol_t *symbol);
-gulong              bin_symbol_get_address (bin_file_t         *bin_file,
-                                            const bin_symbol_t *symbol);
+bin_file_t         *bin_file_new                 (const char         *filename);
+void                bin_file_free                (bin_file_t         *bin_file);
+const bin_symbol_t *bin_file_lookup_symbol       (bin_file_t         *bin_file,
+                                                  gulong              address);
+gboolean            bin_file_check_inode         (bin_file_t         *bin_file,
+                                                  ino_t               inode);
+const char         *bin_symbol_get_name          (bin_file_t         *bin_file,
+                                                  const bin_symbol_t *symbol);
+gulong              bin_symbol_get_address       (bin_file_t         *bin_file,
+                                                  const bin_symbol_t *symbol);
+void                bin_symbol_get_address_range (bin_file_t         *bin_file,
+                                                  const bin_symbol_t *symbol,
+                                                  gulong             *begin,
+                                                  gulong             *end);
 
 #endif
diff --git a/src/libsysprof/elfparser.c b/src/libsysprof/elfparser.c
index 59b7815..376a1f0 100644
--- a/src/libsysprof/elfparser.c
+++ b/src/libsysprof/elfparser.c
@@ -805,12 +805,22 @@ elf_parser_owns_symbol (ElfParser *parser,
 }
 
 gulong
-elf_parser_get_sym_address (ElfParser *parser,
+elf_parser_get_sym_address (ElfParser    *parser,
                             const ElfSym *sym)
 {
     return sym->address - parser->text_section->load_address;
 }
 
+void
+elf_parser_get_sym_address_range (ElfParser    *parser,
+                                  const ElfSym *sym,
+                                  gulong       *begin,
+                                  gulong       *end)
+{
+    *begin = sym->address - parser->text_section->load_address;
+    *end = *begin + st_size (parser, sym->table, sym->offset);
+}
+
 /*
  * Utility functions
  */
diff --git a/src/libsysprof/elfparser.h b/src/libsysprof/elfparser.h
index b22cc38..160e4c9 100644
--- a/src/libsysprof/elfparser.h
+++ b/src/libsysprof/elfparser.h
@@ -45,14 +45,18 @@ gulong        elf_parser_get_text_offset (ElfParser     *parser);
  * of the file would have been mapped, so a - (m - o) is the position
  * in the file of a.
  */
-const ElfSym *elf_parser_lookup_symbol   (ElfParser    *parser,
-                                          gulong        address);
-guint32       elf_parser_get_crc32       (ElfParser    *parser);
-const char   *elf_parser_get_sym_name    (ElfParser    *parser,
-                                          const ElfSym *sym);
-gulong        elf_parser_get_sym_address (ElfParser    *parser,
-                                          const ElfSym *sym);
-gboolean      elf_parser_owns_symbol     (ElfParser    *parser,
-                                          const ElfSym *sym);
-char         *elf_demangle               (const char   *name);
+const ElfSym *elf_parser_lookup_symbol         (ElfParser    *parser,
+                                                gulong        address);
+guint32       elf_parser_get_crc32             (ElfParser    *parser);
+const char   *elf_parser_get_sym_name          (ElfParser    *parser,
+                                                const ElfSym *sym);
+gulong        elf_parser_get_sym_address       (ElfParser    *parser,
+                                                const ElfSym *sym);
+gboolean      elf_parser_owns_symbol           (ElfParser    *parser,
+                                                const ElfSym *sym);
+char         *elf_demangle                     (const char   *name);
+void          elf_parser_get_sym_address_range (ElfParser    *parser,
+                                                const ElfSym *sym,
+                                                gulong       *begin,
+                                                gulong       *end);