Commit Graph

1550 Commits

Author SHA1 Message Date
Bart Joy 816734e2d4 Add screen shot of htop to readme
Added a basic screenshot of htop in action to the readme so that
visitors to the page can quickly get a rough idea about what htop does.
2020-10-01 20:21:44 +13:00
Benny Baumann 2cde4a7f8e Enable NULL pointer checks via compiler if supported 2020-09-29 18:07:17 +02:00
Michael Witten ab3171d21d Process.{h,c}: Use integer types that are more portable
When building on a 32-bit system, the compiler warned that the
following line uses a constant whose value is the overflow result
of a compile-time computation:

  Process.c (line 109):   } else if (number < 10000 * ONE_M) {

Namely, this constant expression:

  10000 * ONE_M

was intended to produce the following value:

  10485760000

However, the result overflowed to produce:

   1895825408

The reason for this overflow is as follows:

  o The macros are expanded:

      10000 * (ONE_K * ONE_K)
      10000 * (1024L * 1024L)

  o The untyped constant expression "10000" is typed:

      10000U * (1024L * 1024L)

  o The parenthesized expression is evaluated:

      10000U * (1048576L)

  o The left operand ("10000U") is converted:

      10000L * (1048576L)

    Unbound by integer sizes, that last multiplication
    would produce the following value:

      10485760000

    However, on a 32-bit machine, where a long is 32 bits
    (really 31 bits when talking about positive numbers),
    the maximum value that can be computed is 2**31-1:

      2147483647

    Consequently, the computation overflows.

  o The compiler produces a long int value that is the
    the result of overflow (10485760000 % 2**31):

      1895825408L

    Actually, I think this overflow is implementation-defined,
    so it's not even a portable description of what happens.

The solution is to use a long long int (or, even better,
an unsigned long long int) type for the constant expression;
the C standard mandates a sufficiently large maximum value
for such types.

Hence, the following change is made to the bad line:

  -   } else if (number < 10000 * ONE_M) {
  +   } else if (number < 10000ULL * ONE_M) {

However, the whole line is now patently silly, because the
variable "number" is typed "unsigned long", and so it will
always be less than the constant expression (the compiler
will warn about this, too).

Hence, "number" must be typed "unsigned long long"; however,
this necessitates changing all of the string formats from
something like "%lu" to something like "%llu".

Et voila! This commit is born.

Then, for the sake of completeness, the declared types of the
constant-expression macros are updated:

  o ONE_K is made unsigned (a "UL" instead of "L")
  o ONE_T is computed by introducing "1ULL *"
  o Similar changes are made for ONE_DECIMAL_{K,T}

Also, a non-portable overflow-conversion to a signed value
has been replaced with a portable comparison:

  -   if ((long long) number == -1LL) {
  +   if (number == ULLONG_MAX) {

It might be worth reviewing the rest of the code for other
cases where overflows are not handled correctly; even at
runtime, it's often necessary to check for overflow unless
such behavior is expected (especially for signed integer
values, for which overflow has implementation-defined
behavior).
2020-09-29 15:47:52 +00:00
Benny Baumann e1c96879f4 Sort headers/includes 2020-09-29 17:41:49 +02:00
Benny Baumann dac1e05a2c Fix FreeBSD compile issue
This issue was previously hidden as xSnprintf expanded to only one large command that didn't trigger the GCC formatting check.
2020-09-29 17:41:31 +02:00
Benny Baumann 736c496dbf Cleanse xStrdup mess 2020-09-29 17:41:31 +02:00
Benny Baumann 8b55113ea8 Reimplement xAsnprintf and xSnprintf as type-safe functions 2020-09-29 17:41:31 +02:00
Christian Göttsche 241e4b3dbf Drop redundant declarations
- `CRT_fatalError()` is declared twice in CRT.h
- `Process_pidFormat`, `Process_writeField()` and `Process_compare` are
  declared twice in Process.h
- `btime` is defined in LinuxProcess.c and also declared in
  LinuxProcess.h, so drop in LinuxProcessList.h
2020-09-29 10:44:42 +02:00
Christian Göttsche 7ae967a04b Drop redundant return statements 2020-09-29 10:44:42 +02:00
Christian Göttsche 6db2d52261 Covert Meter attributes to file-local constant arrays 2020-09-29 10:44:42 +02:00
Christian Göttsche 843949131a Drop redundant casts to the same type 2020-09-29 10:44:42 +02:00
ryenus 214c742ae1 command screen: fill current line when scanning 2020-09-29 10:11:28 +02:00
multi 9ee72568dc CPUMeter: add octuple-column CPU meters.
This is a straightforward extension of the existing multi-column CPU meter
code, which now allows for up CPU meters to be displayed in up to 16 columns.

This also adds the meter declarations to all the platform-specific code.
2020-09-28 14:35:35 +02:00
multi 491bf98b90 Add missing 4-column CPU meters to non-Linux platforms. 2020-09-28 14:35:35 +02:00
multi d22f6573f3 CPUMeter: refactor common CPU meter rendering code.
Instead of scanning the meter name to determine the number of columns in a
CPU meter, move the common code behind some wrapper functions, and specify the
number of columns as an explicit parameter when called from the wrappers.

While this does add a bit of code for all the necessary wrapper functions, this
should be less brittle in case of future changes to the CPU meter code.
2020-09-28 14:35:35 +02:00
Nathan Scott e75077a9f8
Merge pull request #107 from cgzones/hwlock_linuxaffinity
Make --enable-hwloc and --enable-linux-affinity mutual exclusive
2020-09-28 16:47:47 +10:00
Nathan Scott 6191336498
Merge pull request #116 from cgzones/valgrind
Add Valgrind script
2020-09-28 16:46:58 +10:00
Nathan Scott 8c9bd20013
Merge pull request #181 from cgzones/missing_prototypes
Add -Wmissing-prototypes compiler warning
2020-09-28 16:30:57 +10:00
Nathan Scott 400178a89b Merge branch 'arc-is-not-cache' of https://github.com/multiplexd/htop into multiplexd-arc-is-not-cache 2020-09-28 14:44:12 +10:00
Christian Göttsche 4e282eb845 Add -Wmissing-prototypes compiler warning 2020-09-25 17:20:35 +02:00
multi dfa40ad0eb Linux: consider the ZFS ARC to be cache.
This commit is based on a patch originally by @edef1c. The ZFS ARC is a cache
(it's in the name), which will be evicted by the kernel if memory pressure so
requires. Hence, the ARC should not be counted towards a system's total used
memory, and should instead be grouped with the other caches in the system.

Signed-off-by: edef <edef@edef.eu>
2020-09-24 23:27:27 +01:00
Christian Göttsche 18b1e9fba9 Do not drop qualifier in cast
ListItem.c:73:33: warning: cast from 'const void *' to 'struct ListItem_ *' drops const qualifier [-Wcast-qual]
   ListItem* obj1 = (ListItem*) cast1;
                                ^
ListItem.c:74:33: warning: cast from 'const void *' to 'struct ListItem_ *' drops const qualifier [-Wcast-qual]
   ListItem* obj2 = (ListItem*) cast2;
                                ^

Process.c:434:28: warning: cast from 'const void *' to 'struct Process_ *' drops const qualifier [-Wcast-qual]
   Process* p1 = (Process*)v1;
                           ^
Process.c:435:28: warning: cast from 'const void *' to 'struct Process_ *' drops const qualifier [-Wcast-qual]
   Process* p2 = (Process*)v2;
                           ^
Process.c:441:36: warning: cast from 'const void *' to 'struct Process_ *' drops const qualifier [-Wcast-qual]
   Settings *settings = ((Process*)v1)->settings;
                                   ^
Process.c:443:22: warning: cast from 'const void *' to 'struct Process_ *' drops const qualifier [-Wcast-qual]
      p1 = (Process*)v1;
                     ^
Process.c:444:22: warning: cast from 'const void *' to 'struct Process_ *' drops const qualifier [-Wcast-qual]
      p2 = (Process*)v2;
                     ^
Process.c:446:22: warning: cast from 'const void *' to 'struct Process_ *' drops const qualifier [-Wcast-qual]
      p2 = (Process*)v1;
                     ^
Process.c:447:22: warning: cast from 'const void *' to 'struct Process_ *' drops const qualifier [-Wcast-qual]
      p1 = (Process*)v2;
                     ^

AffinityPanel.c:37:16: warning: cast from 'const char *' to 'void *' drops const qualifier [-Wcast-qual]
   free((void*)this->text);
               ^
AffinityPanel.c:39:19: warning: cast from 'const char *' to 'void *' drops const qualifier [-Wcast-qual]
      free((void*)this->indent);
                  ^

linux/LinuxProcess.c:294:36: warning: cast from 'const void *' to 'struct Process_ *' drops const qualifier [-Wcast-qual]
   Settings *settings = ((Process*)v1)->settings;
                                   ^
linux/LinuxProcess.c:296:27: warning: cast from 'const void *' to 'struct LinuxProcess_ *' drops const qualifier [-Wcast-qual]
      p1 = (LinuxProcess*)v1;
                          ^
linux/LinuxProcess.c:297:27: warning: cast from 'const void *' to 'struct LinuxProcess_ *' drops const qualifier [-Wcast-qual]
      p2 = (LinuxProcess*)v2;
                          ^
linux/LinuxProcess.c:299:27: warning: cast from 'const void *' to 'struct LinuxProcess_ *' drops const qualifier [-Wcast-qual]
      p2 = (LinuxProcess*)v1;
                          ^
linux/LinuxProcess.c:300:27: warning: cast from 'const void *' to 'struct LinuxProcess_ *' drops const qualifier [-Wcast-qual]
      p1 = (LinuxProcess*)v2;
                          ^

linux/LinuxProcessList.c:62:32: warning: cast from 'const void *' to 'struct TtyDriver_ *' drops const qualifier [-Wcast-qual]
   TtyDriver* a = (TtyDriver*) va;
                               ^
linux/LinuxProcessList.c:63:32: warning: cast from 'const void *' to 'struct TtyDriver_ *' drops const qualifier [-Wcast-qual]
   TtyDriver* b = (TtyDriver*) vb;
                               ^

linux/Battery.c:130:21: warning: cast from 'const char *' to 'char *' drops const qualifier [-Wcast-qual]
      free((char *) isOnline);
                    ^
linux/Battery.c:197:26: warning: cast from 'const char *' to 'char *' drops const qualifier [-Wcast-qual]
      xSnprintf((char *) filePath, sizeof filePath, SYS_POWERSUPPLY_DIR "/%s/type", entryName);
                         ^
linux/Battery.c:209:29: warning: cast from 'const char *' to 'char *' drops const qualifier [-Wcast-qual]
         xSnprintf((char *) filePath, sizeof filePath, SYS_POWERSUPPLY_DIR "/%s/uevent", entryName);
                            ^
linux/Battery.c:262:29: warning: cast from 'const char *' to 'char *' drops const qualifier [-Wcast-qual]
         xSnprintf((char *) filePath, sizeof filePath, SYS_POWERSUPPLY_DIR "/%s/online", entryName);
                            ^
2020-09-24 20:14:17 +02:00
Christian Göttsche 6a03cd237a Avoid warning about unreachable break statement
htop.c:112:13: warning: 'break' will never be executed [-Wunreachable-code-break]
            break;
            ^~~~~
htop.c:109:13: warning: 'break' will never be executed [-Wunreachable-code-break]
            break;
            ^~~~~
2020-09-24 20:14:17 +02:00
Christian Göttsche cd1ba1422b Avoid bad function cast warning
linux/Platform.c:142:17: warning: cast from function call of type 'double' to non-matching type 'int' [-Wbad-function-cast]
   return (int) floor(uptime);
                ^~~~~~~~~~~~~
2020-09-24 20:14:17 +02:00
Christian Göttsche 4a1f3fca96 Drop unnecessary usage of comma operator 2020-09-24 20:14:17 +02:00
Christian Göttsche 4296e74ada Include prototype in Battery implementation
linux/Battery.c:291:6: warning: no previous prototype for function 'Battery_getData' [-Wmissing-prototypes]
void Battery_getData(double* level, ACPresence* isOnAC) {
     ^
2020-09-24 20:14:17 +02:00
Christian Göttsche ce0fd5f6d8 Drop unused macros 2020-09-24 20:14:17 +02:00
Christian Göttsche edf1b10d2c Read CPU frequency from sysfs by default
Use the more portable sysfs node /sys/devices/system/cpu/cpuX/cpufreq/scaling_cur_freq
to get the CPU frequency.
In case of an error fall back to /proc/cpuinfo .

Also use a fixed width of 4 for the frequency to avoid position jumps
in case the frequency moves in the range 900-1100 MHz.
2020-09-24 20:11:28 +02:00
Christian Göttsche f4e1f4619f Add DeepCode inline suppression
We just want a non-NUll pointer in the matching pid hashtable.
The pointer is not dereferenced anyways.
2020-09-24 20:04:47 +02:00
Christian Göttsche 594409f299 Add DeepCode inline suppression
commsize is bounded by the allocated length passed in by commLen, saved
into commLenIn
2020-09-24 19:56:30 +02:00
Christian Göttsche 005c4d1f23 Make --enable-hwloc and --enable-linux-affinity mutual exclusive
They can not be supported both at the same time.
Fail configure step instead of silently only use hwloc.
2020-09-24 19:43:27 +02:00
ryenus f4bb50294a show selected command wrapped in a separate window
For a process with a very long command, especially with many long
command line arguments, inspecting the command and its arguments could
become inconvenient.

Meanwhile htop supports the concept of "screen", or window, which is
extended here to create a dedicated "CommandScreen", making it possible
to display the command of the selected process in a separate window
meanwhile being wrapped into multiple lines.

Another benefit of using a command screen is, the user can navigate
through the wrapped lines of the command and perform actions like
searching and filtering.
2020-09-24 19:22:25 +02:00
Christian Göttsche 5233817122 Avoid unsigned integer overflow
unsigned integer overflows are well-defined, but they might point to a counting issue.
Having the code free of unsigned overflows makes it easier to spot potential bugs.

  Action.c:332:27: runtime error: implicit conversion from type 'int' of value -1 (32-bit, signed) to type 'uid_t' (aka 'unsigned int') changed the value to 4294967295 (32-bit, unsigned)
  SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Action.c:332:27 in
2020-09-24 18:06:59 +02:00
Benny Baumann 7ecea3d485 Use return value of CLAMP function 2020-09-24 18:06:36 +02:00
Benny Baumann ba0fca1800 Add -Wfloat-equal to default build flags 2020-09-24 18:06:36 +02:00
Benny Baumann 321960bd96 Update delay accounting to use NAN on error 2020-09-24 18:06:36 +02:00
Benny Baumann 3c65d78d77 Update CPU freq display to use NAN on error 2020-09-24 18:06:36 +02:00
Benny Baumann ebcf924643 Use threshold for display of guest/steal/irq meters 2020-09-24 18:06:36 +02:00
Benny Baumann d0d3deb73c Properly query sysconf settting and use NAN if unavailable
This also fixes an issue with time returned negative if sysconf(_SC_CLK_TCK) returned an error.
2020-09-24 18:06:36 +02:00
Benny Baumann 29ec115143 Update IO rate display to use NAN on error 2020-09-24 18:06:36 +02:00
Benny Baumann 47e2cefe02 Update battery API to use NAN on error 2020-09-24 18:06:36 +02:00
Christian Hesse f805093589 align cpu id to right 2020-09-24 17:53:57 +02:00
Christian Göttsche d2b3a7a375 Drop dead process fields
They are nowhere used.
2020-09-24 17:48:38 +02:00
Michael F. Schönitzer c1b5201444 Consistent wording/formatting of field descriptions 2020-09-24 17:48:17 +02:00
Michael F. Schönitzer 83257744cc Document M_PSS and M_PSSWP in man page 2020-09-24 17:48:17 +02:00
Michael F. Schönitzer 7844e06eb0 Document field M_SWAP in man page 2020-09-24 17:48:17 +02:00
Christian Göttsche 2565dd3c58 Drop dead code after break 2020-09-24 17:47:17 +02:00
Christian Göttsche 6b11738744 Avoid arithmetic on booleans 2020-09-23 19:09:11 +02:00
Christian Göttsche f9966b5be3 Use checked allocation wrappers 2020-09-23 17:50:21 +02:00
Benny Baumann e0e5997c53 Fix minor regression in number highlighting
Fixes #163
2020-09-21 14:10:07 +02:00