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Diffstat (limited to 'gdb/doc/gdb.texinfo')
| -rw-r--r-- | gdb/doc/gdb.texinfo | 149 |
1 files changed, 79 insertions, 70 deletions
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index e3288b6..d2174ec 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -2590,10 +2590,19 @@ an @code{fo} followed by zero or more @code{o}s. There is an implicit @code{.*} leading and trailing the regular expression you supply, so to match only functions that begin with @code{foo}, use @code{^foo}. +@cindex non-member C@t{++} functions, set breakpoint in When debugging C@t{++} programs, @code{rbreak} is useful for setting breakpoints on overloaded functions that are not members of any special classes. +@cindex set breakpoints on all functions +The @code{rbreak} command can be used to set breakpoints in +@strong{all} the functions in a program, like this: + +@smallexample +(@value{GDBP}) rbreak . +@end smallexample + @kindex info breakpoints @cindex @code{$_} and @code{info breakpoints} @item info breakpoints @r{[}@var{n}@r{]} @@ -6300,7 +6309,7 @@ $ gdb -nw charset-test GNU gdb 2001-12-19-cvs Copyright 2001 Free Software Foundation, Inc. @dots{} -(gdb) +(@value{GDBP}) @end smallexample We can use the @code{show charset} command to see what character sets @@ -6308,18 +6317,18 @@ We can use the @code{show charset} command to see what character sets strings: @smallexample -(gdb) show charset +(@value{GDBP}) show charset The current host and target character set is `ISO-8859-1'. -(gdb) +(@value{GDBP}) @end smallexample For the sake of printing this manual, let's use @sc{ascii} as our initial character set: @smallexample -(gdb) set charset ASCII -(gdb) show charset +(@value{GDBP}) set charset ASCII +(@value{GDBP}) show charset The current host and target character set is `ASCII'. -(gdb) +(@value{GDBP}) @end smallexample Let's assume that @sc{ascii} is indeed the correct character set for our @@ -6329,20 +6338,20 @@ them properly. Since our current target character set is also @sc{ascii}, the contents of @code{ascii_hello} print legibly: @smallexample -(gdb) print ascii_hello +(@value{GDBP}) print ascii_hello $1 = 0x401698 "Hello, world!\n" -(gdb) print ascii_hello[0] +(@value{GDBP}) print ascii_hello[0] $2 = 72 'H' -(gdb) +(@value{GDBP}) @end smallexample @value{GDBN} uses the target character set for character and string literals you use in expressions: @smallexample -(gdb) print '+' +(@value{GDBP}) print '+' $3 = 43 '+' -(gdb) +(@value{GDBP}) @end smallexample The @sc{ascii} character set uses the number 43 to encode the @samp{+} @@ -6353,20 +6362,20 @@ target program uses. If we print @code{ibm1047_hello} while our target character set is still @sc{ascii}, we get jibberish: @smallexample -(gdb) print ibm1047_hello +(@value{GDBP}) print ibm1047_hello $4 = 0x4016a8 "\310\205\223\223\226k@@\246\226\231\223\204Z%" -(gdb) print ibm1047_hello[0] +(@value{GDBP}) print ibm1047_hello[0] $5 = 200 '\310' -(gdb) +(@value{GDBP}) @end smallexample If we invoke the @code{set target-charset} followed by @key{TAB}@key{TAB}, @value{GDBN} tells us the character sets it supports: @smallexample -(gdb) set target-charset +(@value{GDBP}) set target-charset ASCII EBCDIC-US IBM1047 ISO-8859-1 -(gdb) set target-charset +(@value{GDBP}) set target-charset @end smallexample We can select @sc{ibm1047} as our target character set, and examine the @@ -6376,28 +6385,28 @@ target character set, @sc{ibm1047}, to the host character set, @sc{ascii}, and they display correctly: @smallexample -(gdb) set target-charset IBM1047 -(gdb) show charset +(@value{GDBP}) set target-charset IBM1047 +(@value{GDBP}) show charset The current host character set is `ASCII'. The current target character set is `IBM1047'. -(gdb) print ascii_hello +(@value{GDBP}) print ascii_hello $6 = 0x401698 "\110\145%%?\054\040\167?\162%\144\041\012" -(gdb) print ascii_hello[0] +(@value{GDBP}) print ascii_hello[0] $7 = 72 '\110' -(gdb) print ibm1047_hello +(@value{GDBP}) print ibm1047_hello $8 = 0x4016a8 "Hello, world!\n" -(gdb) print ibm1047_hello[0] +(@value{GDBP}) print ibm1047_hello[0] $9 = 200 'H' -(gdb) +(@value{GDBP}) @end smallexample As above, @value{GDBN} uses the target character set for character and string literals you use in expressions: @smallexample -(gdb) print '+' +(@value{GDBP}) print '+' $10 = 78 '+' -(gdb) +(@value{GDBP}) @end smallexample The @sc{ibm1047} character set uses the number 78 to encode the @samp{+} @@ -6538,7 +6547,7 @@ $ gdb -nw sample GNU gdb 2002-05-06-cvs Copyright 2002 Free Software Foundation, Inc. GDB is free software, @dots{} -(gdb) +(@value{GDBP}) @end smallexample We can expand macros and examine their definitions, even when the @@ -6546,7 +6555,7 @@ program is not running. @value{GDBN} uses the current listing position to decide which macro definitions are in scope: @smallexample -(gdb) list main +(@value{GDBP}) list main 3 4 #define M 42 5 #define ADD(x) (M + x) @@ -6557,18 +6566,18 @@ to decide which macro definitions are in scope: 10 printf ("Hello, world!\n"); 11 #undef N 12 printf ("We're so creative.\n"); -(gdb) info macro ADD +(@value{GDBP}) info macro ADD Defined at /home/jimb/gdb/macros/play/sample.c:5 #define ADD(x) (M + x) -(gdb) info macro Q +(@value{GDBP}) info macro Q Defined at /home/jimb/gdb/macros/play/sample.h:1 included at /home/jimb/gdb/macros/play/sample.c:2 #define Q < -(gdb) macro expand ADD(1) +(@value{GDBP}) macro expand ADD(1) expands to: (42 + 1) -(gdb) macro expand-once ADD(1) +(@value{GDBP}) macro expand-once ADD(1) expands to: once (M + 1) -(gdb) +(@value{GDBP}) @end smallexample In the example above, note that @command{macro expand-once} expands only @@ -6580,27 +6589,27 @@ Once the program is running, GDB uses the macro definitions in force at the source line of the current stack frame: @smallexample -(gdb) break main +(@value{GDBP}) break main Breakpoint 1 at 0x8048370: file sample.c, line 10. -(gdb) run +(@value{GDBP}) run Starting program: /home/jimb/gdb/macros/play/sample Breakpoint 1, main () at sample.c:10 10 printf ("Hello, world!\n"); -(gdb) +(@value{GDBP}) @end smallexample At line 10, the definition of the macro @code{N} at line 9 is in force: @smallexample -(gdb) info macro N +(@value{GDBP}) info macro N Defined at /home/jimb/gdb/macros/play/sample.c:9 #define N 28 -(gdb) macro expand N Q M +(@value{GDBP}) macro expand N Q M expands to: 28 < 42 -(gdb) print N Q M +(@value{GDBP}) print N Q M $1 = 1 -(gdb) +(@value{GDBP}) @end smallexample As we step over directives that remove @code{N}'s definition, and then @@ -6608,23 +6617,23 @@ give it a new definition, @value{GDBN} finds the definition (or lack thereof) in force at each point: @smallexample -(gdb) next +(@value{GDBP}) next Hello, world! 12 printf ("We're so creative.\n"); -(gdb) info macro N +(@value{GDBP}) info macro N The symbol `N' has no definition as a C/C++ preprocessor macro at /home/jimb/gdb/macros/play/sample.c:12 -(gdb) next +(@value{GDBP}) next We're so creative. 14 printf ("Goodbye, world!\n"); -(gdb) info macro N +(@value{GDBP}) info macro N Defined at /home/jimb/gdb/macros/play/sample.c:13 #define N 1729 -(gdb) macro expand N Q M +(@value{GDBP}) macro expand N Q M expands to: 1729 < 42 -(gdb) print N Q M +(@value{GDBP}) print N Q M $2 = 0 -(gdb) +(@value{GDBP}) @end smallexample @@ -7480,7 +7489,7 @@ Normally, when @value{GDBN} prints a code address, it includes the name of the function the address falls in: @smallexample -(gdb) print main +(@value{GDBP}) print main $3 = @{int ()@} 0x11a0 <main> @end smallexample @noindent @@ -7490,9 +7499,9 @@ asterisks around them. For example, if @code{foo} is a function in an unmapped overlay, @value{GDBN} prints it this way: @smallexample -(gdb) overlay list +(@value{GDBP}) overlay list No sections are mapped. -(gdb) print foo +(@value{GDBP}) print foo $5 = @{int (int)@} 0x100000 <*foo*> @end smallexample @noindent @@ -7500,10 +7509,10 @@ When @code{foo}'s overlay is mapped, @value{GDBN} prints the function's name normally: @smallexample -(gdb) overlay list +(@value{GDBP}) overlay list Section .ov.foo.text, loaded at 0x100000 - 0x100034, mapped at 0x1016 - 0x104a -(gdb) print foo +(@value{GDBP}) print foo $6 = @{int (int)@} 0x1016 <foo> @end smallexample @@ -11756,7 +11765,7 @@ some confusion. If in doubt, try the @code{info functions} and @pxref{Symbols}). Here's an example: @smallexample -(gdb) info function CreateFileA +(@value{GDBP}) info function CreateFileA All functions matching regular expression "CreateFileA": Non-debugging symbols: @@ -11765,7 +11774,7 @@ Non-debugging symbols: @end smallexample @smallexample -(gdb) info function ! +(@value{GDBP}) info function ! All functions matching regular expression "!": Non-debugging symbols: @@ -11792,28 +11801,28 @@ type information in the command. Here's an example of the type of problem: @smallexample -(gdb) print 'cygwin1!__argv' +(@value{GDBP}) print 'cygwin1!__argv' $1 = 268572168 @end smallexample @smallexample -(gdb) x 'cygwin1!__argv' +(@value{GDBP}) x 'cygwin1!__argv' 0x10021610: "\230y\"" @end smallexample And two possible solutions: @smallexample -(gdb) print ((char **)'cygwin1!__argv')[0] +(@value{GDBP}) print ((char **)'cygwin1!__argv')[0] $2 = 0x22fd98 "/cygdrive/c/mydirectory/myprogram" @end smallexample @smallexample -(gdb) x/2x &'cygwin1!__argv' +(@value{GDBP}) x/2x &'cygwin1!__argv' 0x610c0aa8 <cygwin1!__argv>: 0x10021608 0x00000000 -(gdb) x/x 0x10021608 +(@value{GDBP}) x/x 0x10021608 0x10021608: 0x0022fd98 -(gdb) x/s 0x0022fd98 +(@value{GDBP}) x/s 0x0022fd98 0x22fd98: "/cygdrive/c/mydirectory/myprogram" @end smallexample @@ -11824,7 +11833,7 @@ function's frame set-up code. You can work around this by using ``*&'' to set the breakpoint at a raw memory address: @smallexample -(gdb) break *&'python22!PyOS_Readline' +(@value{GDBP}) break *&'python22!PyOS_Readline' Breakpoint 1 at 0x1e04eff0 @end smallexample @@ -14668,7 +14677,7 @@ corresponding output for that command will also be prefixed by that same @table @code @item @var{output} @expansion{} -@code{( @var{out-of-band-record} )* [ @var{result-record} ] "(gdb)" @var{nl}} +@code{( @var{out-of-band-record} )* [ @var{result-record} ] "(@value{GDBP})" @var{nl}} @item @var{result-record} @expansion{} @code{ [ @var{token} ] "^" @var{result-class} ( "," @var{result} )* @var{nl}} @@ -18531,7 +18540,7 @@ for details. This GDB was configured as "i386-pc-linux-gnu" ^Z^Zpre-prompt -(gdb) +(@value{GDBP}) ^Z^Zprompt @kbd{quit} @@ -19453,13 +19462,13 @@ either quit @value{GDBN} or create a core file of the current @value{GDBN} session. @smallexample -(gdb) @kbd{maint internal-error testing, 1, 2} +(@value{GDBP}) @kbd{maint internal-error testing, 1, 2} @dots{}/maint.c:121: internal-error: testing, 1, 2 A problem internal to GDB has been detected. Further debugging may prove unreliable. Quit this debugging session? (y or n) @kbd{n} Create a core file? (y or n) @kbd{n} -(gdb) +(@value{GDBP}) @end smallexample Takes an optional parameter that is used as the text of the error or @@ -19471,18 +19480,18 @@ warning message. Prints the contents of @value{GDBN}'s internal dummy-frame stack. @smallexample -(gdb) @kbd{b add} +(@value{GDBP}) @kbd{b add} @dots{} -(gdb) @kbd{print add(2,3)} +(@value{GDBP}) @kbd{print add(2,3)} Breakpoint 2, add (a=2, b=3) at @dots{} 58 return (a + b); The program being debugged stopped while in a function called from GDB. @dots{} -(gdb) @kbd{maint print dummy-frames} +(@value{GDBP}) @kbd{maint print dummy-frames} 0x1a57c80: pc=0x01014068 fp=0x0200bddc sp=0x0200bdd6 top=0x0200bdd4 id=@{stack=0x200bddc,code=0x101405c@} call_lo=0x01014000 call_hi=0x01014001 -(gdb) +(@value{GDBP}) @end smallexample Takes an optional file parameter. @@ -19513,7 +19522,7 @@ Print @value{GDBN}'s internal register group data structures. Takes an optional file parameter. @smallexample -(gdb) @kbd{maint print reggroups} +(@value{GDBP}) @kbd{maint print reggroups} Group Type general user float user @@ -20714,7 +20723,7 @@ previous activity (continue, step). No additional continue or step request from @value{GDBN} is required. @smallexample -(gdb) continue +(@value{GDBP}) continue <- target requests 'system call X' target is stopped, @value{GDBN} executes system call -> GDB returns result |