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runtime: handle linux/arm64 signal register

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Set sigpc and implement dumpregs for linux/arm64.
Without this change, cmd/vet tool test will fail randomly.

Updates golang/go#20931

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/220543
This commit is contained in:
eric fang 2020-02-21 09:01:02 +00:00 committed by Ian Lance Taylor
parent 799270b430
commit 3f469f585e
2 changed files with 24 additions and 41 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
5fc21bb0d91d916940c21e6d4a3e10ad3f45343d
7a62a49e62c090118fa003d9265c5f5e2090c4f9
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

63
libgo/runtime/go-signal.c
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@ -205,28 +205,18 @@ getSiginfo(siginfo_t *info, void *context __attribute__((unused)))
// Use unportable code to pull it from context, and if that fails
// try a stack backtrace across the signal handler.
#ifdef __x86_64__
#ifdef __linux__
#if defined(__x86_64__) && defined(__linux__)
ret.sigpc = ((ucontext_t*)(context))->uc_mcontext.gregs[REG_RIP];
#endif
#endif
#ifdef __i386__
#ifdef __linux__
#elif defined(__i386__) && defined(__linux__)
ret.sigpc = ((ucontext_t*)(context))->uc_mcontext.gregs[REG_EIP];
#endif
#endif
#ifdef __alpha__
#ifdef __linux__
#elif defined(__alpha__) && defined(__linux__)
ret.sigpc = ((ucontext_t*)(context))->uc_mcontext.sc_pc;
#endif
#endif
#ifdef __PPC__
#ifdef __linux__
#elif defined(__PPC__) && defined(__linux__)
ret.sigpc = ((ucontext_t*)(context))->uc_mcontext.regs->nip;
#endif
#ifdef _AIX
#elif defined(__PPC__) && defined(_AIX)
ret.sigpc = ((ucontext_t*)(context))->uc_mcontext.jmp_context.iar;
#endif
#elif defined(__aarch64__) && defined(__linux__)
ret.sigpc = ((ucontext_t*)(context))->uc_mcontext.pc;
#endif
if (ret.sigpc == 0) {
@ -250,8 +240,7 @@ void dumpregs(siginfo_t *, void *)
void
dumpregs(siginfo_t *info __attribute__((unused)), void *context __attribute__((unused)))
{
#ifdef __x86_64__
#ifdef __linux__
#if defined(__x86_64__) && defined(__linux__)
{
mcontext_t *m = &((ucontext_t*)(context))->uc_mcontext;
@ -277,11 +266,7 @@ dumpregs(siginfo_t *info __attribute__((unused)), void *context __attribute__((u
runtime_printf("fs %X\n", (m->gregs[REG_CSGSFS] >> 16) & 0xffff);
runtime_printf("gs %X\n", (m->gregs[REG_CSGSFS] >> 32) & 0xffff);
}
#endif
#endif
#ifdef __i386__
#ifdef __linux__
#elif defined(__i386__) && defined(__linux__)
{
mcontext_t *m = &((ucontext_t*)(context))->uc_mcontext;
@ -299,11 +284,7 @@ dumpregs(siginfo_t *info __attribute__((unused)), void *context __attribute__((u
runtime_printf("fs %x\n", m->gregs[REG_FS]);
runtime_printf("gs %x\n", m->gregs[REG_GS]);
}
#endif
#endif
#ifdef __alpha__
#ifdef __linux__
#elif defined(__alpha__) && defined(__linux__)
{
mcontext_t *m = &((ucontext_t*)(context))->uc_mcontext;
@ -340,11 +321,7 @@ dumpregs(siginfo_t *info __attribute__((unused)), void *context __attribute__((u
runtime_printf("sp %X\n", m->sc_regs[30]);
runtime_printf("pc %X\n", m->sc_pc);
}
#endif
#endif
#if defined(__PPC__) && defined(__LITTLE_ENDIAN__)
#ifdef __linux__
#elif defined(__PPC__) && defined(__LITTLE_ENDIAN__) && defined(__linux__)
{
mcontext_t *m = &((ucontext_t*)(context))->uc_mcontext;
int i;
@ -358,11 +335,7 @@ dumpregs(siginfo_t *info __attribute__((unused)), void *context __attribute__((u
runtime_printf("ctr %X\n", m->regs->ctr);
runtime_printf("xer %X\n", m->regs->xer);
}
#endif
#endif
#ifdef __PPC__
#ifdef _AIX
#elif defined(__PPC__) && defined(_AIX)
{
mcontext_t *m = &((ucontext_t*)(context))->uc_mcontext;
int i;
@ -376,6 +349,16 @@ dumpregs(siginfo_t *info __attribute__((unused)), void *context __attribute__((u
runtime_printf("ctr %p\n", m->jmp_context.ctr);
runtime_printf("xer %x\n", m->jmp_context.xer);
}
#endif
#elif defined(__aarch64__) && defined(__linux__)
{
mcontext_t *m = &((ucontext_t*)(context))->uc_mcontext;
int i;
for (i = 0; i < 31; i++)
runtime_printf("x%d %X\n", i, m->regs[i]);
runtime_printf("sp %X\n", m->sp);
runtime_printf("pc %X\n", m->pc);
runtime_printf("pstate %X\n", m->pstate);
}
#endif
}