espressif/ESP8266_RTOS_SDK
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ESP8266_RTOS_SDK/components/newlib
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Trygve Laugstøl 24ef94f811 Improve pvPortMalloc() and family. 
fix(esp8266): If MEMLEAK_DEBUG is defined, create an alternate function
called `.._trace` that for each of `pvPortMalloc`, `pvPortZalloc`,
`pvPortCalloc` and `vPortFree`. The original function delegates to this new
tracing function but uses NULL and 0 for the file and line number. This ensures
that the pvPortMalloc exists as a symbol that can be used by the binary blobs
without any problems.

Example output from earlier usage:

~~~
--------Show Malloc--------
F:ppT	L:512	malloc 2064	@ 0x3ffefd08
F:pmT	L:256	malloc 1040	@ 0x3fff0518
F:tiT	L:512	malloc 2064	@ 0x3fff0928
F:uiT	L:640	malloc 2576	@ 0x3fff1138
F:IDLE	L:176	malloc 720	@ 0x3fff1b48
F:Tmr Svc	L:512	malloc 2064	@ 0x3fff1e18
~~~

fix(lwip): Remove declarations of `pvPortMalloc()` and family.

This fixes some of the issues in espressif/ESP8266_RTOS_SDK#189 but some of the
example applications fails. Not ready for merge but comments on my approach
will be appreciated.
2018-05-24 08:57:21 +08:00
..
newlib
Improve pvPortMalloc() and family.
2018-05-24 08:57:21 +08:00
component.mk
feat(newlib): Add newlib platform function
2018-05-14 14:30:42 +08:00
Kconfig
feat(kconfig): Add option to kconfig
2018-05-11 14:26:57 +08:00
README.md
doc(newlib): Add doc for newlib
2018-05-18 16:55:50 +08:00

README.md

The newlib version has been updated to "2.2.0" and supply two version C libraries to user. One is "libc.a" which functions have more features base on stand C, another is "libc_nano.c" which functions have less function.

You can choose the one you needed by menuconfig:

Component config --->
        newlib --- >
                newlib level(XXXX)
                        ( ) normal
                        ( ) nano

The normal "libc" has position argument, "long long" type data and float data transformation at function printf/scanf and so on. So it should cost more stack and heap, the test data as following:
Object Origin newlib New newlib New newlib nano
Start heap/byte 53000 Start heap/byte 49184 Start heap/byte 51824
Fucntion Stack/byte Heap/byte Heap cost/byte Stack/byte Heap/byte Heap cost/byte Stack/byte Heap/byte Heap cost/byte
isalnum 96 53000 0 80 49184 0 80 51824 0
isalpha 80 53000 0 64 49184 0 64 51824 0
isspace 80 53000 0 64 49184 0 64 51824 0
atoi 160 53000 0 144 49184 0 144 51824 0
strtol 144 53000 0 128 49184 0 128 51824 0
atof 224 53000 0 208 49184 0 208 51824 0
atoff 224 53000 0 208 49184 0 208 51824 0
strtod 208 53000 0 192 49184 0 192 51824 0
strtof 208 53000 0 192 49184 0 192 51824 0
asprintf 880 52616 384 1200 48800 384 608 51632 192
sscanf 1552 53000 0 2032 49184 0 1120 51824 0
gmtime 944 52616 384 1040 48576 608 1296 51512 312
localtime 160 53000 0 288 49184 0 288 51824 0
mktime 320 53000 0 448 49184 0 448 51824 0
asctime 768 52488 480 1264 48528 656 752 51464 360
settimeofday 336 53000 0 320 49184 0 320 51824 0
gettimeofday 480 53000 0 464 49184 0 464 51824 0
localtime_r 304 53000 0 432 49184 0 432 51824 0
asprintf（64bit） 752 52424 576 1136 48336 848 608 51272 552
sscanf（64bit） 1056 53000 0 1376 49184 0 1040 51824 0