Update find command help and search memory docs

This patch updates the `find` command help and docs description to show
how to search for not null terminated strings when current language's
strings includes it.

gdb/ChangeLog:

	PR gdb/21945
	* findcmd.c (_initialize_mem_search): Update find command help
	text.

gdb/doc/ChangeLog:

	PR gdb/21945
	* gdb.texinfo (Search Memory): Update description and example
	about how to search a string without NULL terminator.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b3032ed..6134efc 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2017-11-26  Dominik Czarnota  <dominik.b.czarnota@gmail.com>
+
+       PR gdb/21945
+       * findcmd.c (_initialize_mem_search): Update find command help
+       text.
+
 2017-11-26  Simon Marchi  <simon.marchi@polymtl.ca>
 
        * python/python.c (do_start_initialization): Change progname

diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 988b7b8..2a1eb76 100644 (file)
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,9 @@
+2017-11-26  Dominik Czarnota  <dominik.b.czarnota@gmail.com>
+
+       PR gdb/21945
+       * gdb.texinfo (Search Memory): Update description and example
+       about how to search a string without NULL terminator.
+
 2017-11-24  Joel Brobecker  <brobecker@adacore.com>
 
        * gdb.texinfo (GDB/MI Ada Exception Information): Document

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 00451d2..675f6e7 100644 (file)
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -11920,6 +11920,8 @@ giant words (eight bytes)
 All values are interpreted in the current language.
 This means, for example, that if the current source language is C/C@t{++}
 then searching for the string ``hello'' includes the trailing '\0'.
+The null terminator can be removed from searching by using casts,
+e.g.: @samp{@{char[5]@}"hello"}.
 
 If the value size is not specified, it is taken from the
 value's type in the current language.
@@ -11969,7 +11971,11 @@ you get during debugging:
 (gdb) find &hello[0], +sizeof(hello), 'h', 'e', 'l', 'l', 'o'
 0x8049567 <hello.1620>
 0x804956d <hello.1620+6>
-2 patterns found
+2 patterns found.
+(gdb) find &hello[0], +sizeof(hello), @{char[5]@}"hello"
+0x8049567 <hello.1620>
+0x804956d <hello.1620+6>
+2 patterns found.
 (gdb) find /b1 &hello[0], +sizeof(hello), 'h', 0x65, 'l'
 0x8049567 <hello.1620>
 1 pattern found

diff --git a/gdb/findcmd.c b/gdb/findcmd.c
index b43fefc..d437b56 100644 (file)
--- a/gdb/findcmd.c
+++ b/gdb/findcmd.c
@@ -293,7 +293,9 @@ and if not specified the size is taken from the type of the expression\n\
 in the current language.\n\
 Note that this means for example that in the case of C-like languages\n\
 a search for an untyped 0x42 will search for \"(int) 0x42\"\n\
-which is typically four bytes.\n\
+which is typically four bytes, and a search for a string \"hello\" will\n\
+include the trailing '\\0'.  The null terminator can be removed from\n\
+searching by using casts, e.g.: {char[5]}\"hello\".\n\
 \n\
 The address of the last match is stored as the value of \"$_\".\n\
 Convenience variable \"$numfound\" is set to the number of matches."),