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Implement tree-shaking for Python sources

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This commit is contained in:
Justine Tunney 2021-09-05 01:20:03 -07:00
parent 81287b7ec0
commit 44c87b83ff
110 changed files with 899 additions and 1922 deletions
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2
tool/build/lib/elfwriter.h
View file

@ -69,7 +69,7 @@ struct ElfWriterSymRef elfwriter_linksym(struct ElfWriter *, const char *, int,
int);
struct ElfWriterSymRef elfwriter_appendsym(struct ElfWriter *, const char *,
int, int, size_t, size_t);
void elfwriter_yoink(struct ElfWriter *, const char *);
void elfwriter_yoink(struct ElfWriter *, const char *, int);
void elfwriter_setsection(struct ElfWriter *, struct ElfWriterSymRef, uint16_t);
void elfwriter_zip(struct ElfWriter *, const char *, const char *, size_t,
const void *, size_t, uint32_t, struct timespec,

4
tool/build/lib/elfwriter_yoink.c
View file

@ -19,13 +19,13 @@
#include "libc/str/str.h"
#include "tool/build/lib/elfwriter.h"
void elfwriter_yoink(struct ElfWriter *elf, const char *symbol) {
void elfwriter_yoink(struct ElfWriter *elf, const char *symbol, int stb) {
unsigned char *p;
struct ElfWriterSymRef sym;
const unsigned char kNopl[8] = "\017\037\004\045\000\000\000\000";
p = elfwriter_reserve(elf, 8);
memcpy(p, kNopl, sizeof(kNopl));
sym = elfwriter_linksym(elf, symbol, ELF64_ST_INFO(STB_GLOBAL, STT_OBJECT),
sym = elfwriter_linksym(elf, symbol, ELF64_ST_INFO(stb, STT_OBJECT),
STV_HIDDEN);
elfwriter_appendrela(elf, sizeof(kNopl) - 4, sym, R_X86_64_32, 0);
elfwriter_commit(elf, sizeof(kNopl));

3
tool/build/zipobj.c
View file

@ -18,6 +18,7 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/struct/stat.h"
#include "libc/elf/def.h"
#include "libc/fmt/conv.h"
#include "libc/limits.h"
#include "libc/log/check.h"
@ -141,7 +142,7 @@ void PullEndOfCentralDirectoryIntoLinkage(struct ElfWriter *elf) {
elfwriter_align(elf, 1, 0);
elfwriter_startsection(elf, ".yoink", SHT_PROGBITS,
SHF_ALLOC | SHF_EXECINSTR);
elfwriter_yoink(elf, yoink_);
elfwriter_yoink(elf, yoink_, STB_GLOBAL);
elfwriter_finishsection(elf);
}

1
tool/emacs/cosmo-c-builtins.el
View file

@ -1292,6 +1292,7 @@
"STATIC_YOINK"
"STATIC_YOINK_SOURCE"
"PYTHON_YOINK"
"PYTHON_PROVIDE"
"STRINGIFY"))
)