managedc #1209
managedc #1209
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Official preview link: https://docs.microej.com/en/managedc/ApplicationDeveloperGuide/managedc/index.html |
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@frivieremicroej i added some comments based on my tests on linux and on target
| void print_time() { | ||
| struct timespec ts; | ||
| clock_gettime(CLOCK_REALTIME, &ts); | ||
| printf("%lld.%.9ld", (long long)ts.tv_sec, ts.tv_nsec); |
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| printf("%lld.%.9ld", (long long)ts.tv_sec, ts.tv_nsec); | |
| printf("%lld.%.9ld", (long long)ts.tv_sec, ts.tv_nsec); | |
| printf("%lld.%.9ld\n", (long long)ts.tv_sec, ts.tv_nsec); |
Without \n the program will not print anything
| public static void main(String[] args) throws IOException { | ||
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| // Initialize WASI with the memory of my_app module and no preopened directories | ||
| Wasi.init(Memory, null); |
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This doesn't build in my case.
1. ERROR in C:\git\managedc\Tool-Project-Template-Application\src\main\java\com\mycompany\myapplication\Main.java (at line 59) Wasi.init(Memory, null);
The following builds:
Wasi.init(Memory);
or
Wasi.init(Memory, (String[]) null);
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| .. code:: bash | ||
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| git clone git@github.com:MicroEJ/Tool-Project-Template-Application.git |
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If we try to run the factorial sample, then it won't work because the default Java heap (64KB) is not enough, the wasi runtime is probably bigger than before...
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| The Core Engine allows to expose Managed C memory to Java. A Managed C module contains | ||
| at most one memory. This Managed C module memory is automatically generated by the C compiler |
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| at most one memory. This Managed C module memory is automatically generated by the C compiler | |
| at most one memory. This Managed C module memory is automatically generated by the C compiler | |
| at most one shared memory. This Managed C module memory is automatically generated by the C compiler |
Use malloc heap instead of heap + main stack everywhere
- remove -Wl,--no-entry : useless only needed with -nostdlib - remove compile specific options: -mcpu=mvp -O3 - add -Wl,--allow-undefined (likelky there is a C->Java callback) also document the specific case of the main function
we will revisit this section with a dedicated PR see #1346 (comment)
also improve wording
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rebased on master. |
…for memory load/store and atomic instructions (#1360)
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