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193daab988
In linker, refuse to write conservative (array of pointers) as the garbage collection type for any variable in the data/bss GC program. In the linker, attach the Go type to an already-read C declaration during dedup. This gives us Go types for C globals for free as long as the cmd/dist-generated Go code contains the declaration. (Most runtime C declarations have a corresponding Go declaration. Both are bss declarations and so the linker dedups them.) In cmd/dist, add a few more C files to the auto-Go-declaration list in order to get Go type information for the C declarations into the linker. In C compiler, mark all non-pointer-containing global declarations and all string data as NOPTR. This allows them to exist in C files without any corresponding Go declaration. Count C function pointers as "non-pointer-containing", since we have no heap-allocated C functions. In runtime, add NOPTR to the remaining pointer-containing declarations, none of which refer to Go heap objects. In runtime, also move os.Args and syscall.envs data into runtime-owned variables. Otherwise, in programs that do not import os or syscall, the runtime variables named os.Args and syscall.envs will be missing type information. I believe that this CL eliminates the final source of conservative GC scanning in non-SWIG Go programs, and therefore... Fixes #909. LGTM=iant R=iant CC=golang-codereviews https://golang.org/cl/149770043
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "textflag.h"
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#define N SigNotify
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#define K SigKill
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#define T SigThrow
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#define P SigPanic
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#define D SigDefault
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#pragma dataflag NOPTR
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SigTab runtime·sigtab[] = {
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/* 0 */ 0, "SIGNONE: no trap",
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/* 1 */ N+K, "SIGHUP: terminal line hangup",
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/* 2 */ N+K, "SIGINT: interrupt",
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/* 3 */ N+T, "SIGQUIT: quit",
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/* 4 */ T, "SIGILL: illegal instruction",
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/* 5 */ T, "SIGTRAP: trace trap",
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/* 6 */ N+T, "SIGABRT: abort",
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/* 7 */ T, "SIGEMT: emulate instruction executed",
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/* 8 */ P, "SIGFPE: floating-point exception",
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/* 9 */ 0, "SIGKILL: kill",
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/* 10 */ P, "SIGBUS: bus error",
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/* 11 */ P, "SIGSEGV: segmentation violation",
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/* 12 */ T, "SIGSYS: bad system call",
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/* 13 */ N, "SIGPIPE: write to broken pipe",
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/* 14 */ N, "SIGALRM: alarm clock",
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/* 15 */ N+K, "SIGTERM: termination",
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/* 16 */ N, "SIGURG: urgent condition on socket",
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/* 17 */ 0, "SIGSTOP: stop",
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/* 18 */ N+D, "SIGTSTP: keyboard stop",
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/* 19 */ 0, "SIGCONT: continue after stop",
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/* 20 */ N, "SIGCHLD: child status has changed",
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/* 21 */ N+D, "SIGTTIN: background read from tty",
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/* 22 */ N+D, "SIGTTOU: background write to tty",
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/* 23 */ N, "SIGIO: i/o now possible",
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/* 24 */ N, "SIGXCPU: cpu limit exceeded",
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/* 25 */ N, "SIGXFSZ: file size limit exceeded",
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/* 26 */ N, "SIGVTALRM: virtual alarm clock",
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/* 27 */ N, "SIGPROF: profiling alarm clock",
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/* 28 */ N, "SIGWINCH: window size change",
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/* 29 */ N, "SIGINFO: status request from keyboard",
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/* 30 */ N, "SIGUSR1: user-defined signal 1",
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/* 31 */ N, "SIGUSR2: user-defined signal 2",
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};
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#undef N
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#undef K
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#undef T
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#undef P
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#undef D
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