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strace: support pread, pwrite

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This commit is contained in:
K. Lange 2024-02-08 16:56:15 +09:00
parent fb2628d619
commit 55c0a2ab0d
1 changed files with 21 additions and 1 deletions
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22
apps/strace.c
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@ -99,6 +99,8 @@ const char * syscall_names[] = {
[SYS_RECV] = "recv", [SYS_RECV] = "recv",
[SYS_SEND] = "send", [SYS_SEND] = "send",
[SYS_SHUTDOWN] = "shutdown", [SYS_SHUTDOWN] = "shutdown",
[SYS_PREAD] = "pread",
[SYS_PWRITE] = "pwrite",
}; };
char syscall_mask[] = { char syscall_mask[] = {
@ -173,6 +175,8 @@ char syscall_mask[] = {
[SYS_RECV] = 1, [SYS_RECV] = 1,
[SYS_SEND] = 1, [SYS_SEND] = 1,
[SYS_SHUTDOWN] = 1, [SYS_SHUTDOWN] = 1,
[SYS_PREAD] = 1,
[SYS_PWRITE] = 1,
}; };
#define M(e) [e] = #e #define M(e) [e] = #e
@ -582,6 +586,16 @@ static void handle_syscall(pid_t pid, struct URegs * r) {
buffer_arg(pid, uregs_syscall_arg2(r), uregs_syscall_arg3(r)); COMMA; buffer_arg(pid, uregs_syscall_arg2(r), uregs_syscall_arg3(r)); COMMA;
uint_arg(uregs_syscall_arg3(r)); uint_arg(uregs_syscall_arg3(r));
break; break;
case SYS_PREAD:
fd_arg(pid, uregs_syscall_arg1(r)); COMMA;
/* Plus three more when done */
break;
case SYS_PWRITE:
fd_arg(pid, uregs_syscall_arg1(r)); COMMA;
buffer_arg(pid, uregs_syscall_arg2(r), uregs_syscall_arg3(r)); COMMA;
uint_arg(uregs_syscall_arg3(r)); COMMA;
uint_arg(uregs_syscall_arg4(r));
break;
case SYS_CLOSE: case SYS_CLOSE:
fd_arg(pid, uregs_syscall_arg1(r)); fd_arg(pid, uregs_syscall_arg1(r));
break; break;
@ -792,6 +806,12 @@ static void finish_syscall(pid_t pid, int syscall, struct URegs * r) {
uint_arg(uregs_syscall_arg3(r)); uint_arg(uregs_syscall_arg3(r));
maybe_errno(r); maybe_errno(r);
break; break;
case SYS_PREAD:
buffer_arg(pid, uregs_syscall_arg2(r), uregs_syscall_result(r)); COMMA;
uint_arg(uregs_syscall_arg3(r)); COMMA;
uint_arg(uregs_syscall_arg4(r));
maybe_errno(r);
break;
case SYS_GETHOSTNAME: case SYS_GETHOSTNAME:
string_arg(pid, uregs_syscall_arg1(r)); string_arg(pid, uregs_syscall_arg1(r));
maybe_errno(r); maybe_errno(r);
@ -888,7 +908,7 @@ int main(int argc, char * argv[]) {
int syscalls[] = { int syscalls[] = {
SYS_OPEN, SYS_READ, SYS_WRITE, SYS_CLOSE, SYS_STAT, SYS_FSWAIT, SYS_OPEN, SYS_READ, SYS_WRITE, SYS_CLOSE, SYS_STAT, SYS_FSWAIT,
SYS_FSWAIT2, SYS_FSWAIT3, SYS_SEEK, SYS_IOCTL, SYS_PIPE, SYS_MKPIPE, SYS_FSWAIT2, SYS_FSWAIT3, SYS_SEEK, SYS_IOCTL, SYS_PIPE, SYS_MKPIPE,
SYS_DUP2, SYS_READDIR, SYS_OPENPTY, SYS_DUP2, SYS_READDIR, SYS_OPENPTY, SYS_PREAD, SYS_PWRITE,
0 0
}; };
for (int *i = syscalls; *i; i++) { for (int *i = syscalls; *i; i++) {