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Show crash reports on SIGSYS

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This will help make it easier to troubleshoot ABI breakages with on
operating systems that, unlike Linux don't have ironclad guarantees
to not break userspace.
This commit is contained in:
Justine Tunney 2022-06-23 13:01:01 -07:00
parent a4601a24d3
commit 44da16255a
11 changed files with 83 additions and 19 deletions
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25
libc/log/getsicodename.c
View file

@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/fmt/itoa.h"
#include "libc/log/log.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/sicode.h"
@ -29,13 +30,17 @@ static bool IsSiUser(int si_code) {
}
}
static void NameIt(char p[17], const char *s, int si_code) {
p = stpcpy(p, s);
FormatInt32(p, si_code);
}
/**
* Returns symbolic name for siginfo::si_code value.
*/
const char *GetSiCodeName(int sig, int si_code) {
static char b[16];
bzero(b, sizeof(b));
strcpy(b, "SI_???");
static char b[17];
NameIt(b, "SI_", si_code);
if (si_code == SI_QUEUE) {
strcpy(b + 3, "QUEUE"); /* sent by sigqueue(2) */
} else if (si_code == SI_TIMER) {
@ -55,7 +60,7 @@ const char *GetSiCodeName(int sig, int si_code) {
} else if (IsSiUser(si_code)) {
strcpy(b + 3, "USER"); /* sent by kill(2) i.e. from userspace */
} else if (sig == SIGCHLD) {
strcpy(b, "CLD_???");
NameIt(b, "CLD_", si_code);
if (si_code == CLD_EXITED) {
strcpy(b + 4, "EXITED"); /* child exited */
} else if (si_code == CLD_KILLED) {
@ -70,14 +75,14 @@ const char *GetSiCodeName(int sig, int si_code) {
strcpy(b + 4, "CONTINUED"); /* stopped child continued */
}
} else if (sig == SIGTRAP) {
strcpy(b, "TRAP_???");
NameIt(b, "TRAP_", si_code);
if (si_code == TRAP_BRKPT) {
strcpy(b + 5, "BRKPT"); /* process breakpoint */
} else if (si_code == TRAP_TRACE) {
strcpy(b + 5, "TRACE"); /* process trace trap */
}
} else if (sig == SIGSEGV) {
strcpy(b, "SEGV_???");
NameIt(b, "SEGV_", si_code);
if (si_code == SEGV_MAPERR) {
strcpy(b + 5, "MAPERR"); /* address not mapped to object */
} else if (si_code == SEGV_ACCERR) {
@ -86,7 +91,7 @@ const char *GetSiCodeName(int sig, int si_code) {
strcpy(b + 5, "PKUERR"); /* FreeBSD: x86: PKU violation */
}
} else if (sig == SIGFPE) {
strcpy(b, "FPE_???");
NameIt(b, "FPE_???", si_code);
if (si_code == FPE_INTDIV) {
strcpy(b + 4, "INTDIV"); /* integer divide by zero */
} else if (si_code == FPE_INTOVF) {
@ -105,7 +110,7 @@ const char *GetSiCodeName(int sig, int si_code) {
strcpy(b + 4, "FLTSUB"); /* subscript out of range */
}
} else if (sig == SIGILL) {
strcpy(b, "ILL_???");
NameIt(b, "ILL_", si_code);
if (si_code == ILL_ILLOPC) {
strcpy(b + 4, "ILLOPC"); /* illegal opcode */
} else if (si_code == ILL_ILLOPN) {
@ -124,7 +129,7 @@ const char *GetSiCodeName(int sig, int si_code) {
strcpy(b + 4, "BADSTK"); /* internal stack error */
}
} else if (sig == SIGBUS) {
strcpy(b, "BUS_???");
NameIt(b, "BUS_", si_code);
if (si_code == BUS_ADRALN) {
strcpy(b + 4, "ADRALN"); /* invalid address alignment */
} else if (si_code == BUS_ADRERR) {
@ -139,7 +144,7 @@ const char *GetSiCodeName(int sig, int si_code) {
strcpy(b + 4, "MCEERR_AO"); /* Linux 2.6.32+ */
}
} else if (sig == SIGIO) {
strcpy(b, "POLL_???");
NameIt(b, "POLL_", si_code);
if (si_code == POLL_IN) {
strcpy(b + 5, "IN"); /* data input available */
} else if (si_code == POLL_OUT) {