From 23ed2ef5239c339880af6ff85a50abb7cd9c9ed1 Mon Sep 17 00:00:00 2001
From: Akash Levy <akash@silimate.com>
Date: Tue, 3 Feb 2026 23:55:25 -0800
Subject: [PATCH] Small abc update to see what happens

---
 passes/techmap/abc.cc | 55 +++++++++++++++++++++++++++++++------------
 1 file changed, 40 insertions(+), 15 deletions(-)

diff --git a/passes/techmap/abc.cc b/passes/techmap/abc.cc
index 9b22c38f0..13f1d0181 100644
--- a/passes/techmap/abc.cc
+++ b/passes/techmap/abc.cc
@@ -191,10 +191,10 @@ struct AbcProcess
 		int status;
 		int ret = waitpid(pid, &status, 0);
 		if (ret != pid) {
-			log_error("waitpid(%d) failed", pid);
+			log_error("waitpid(%d) failed\n", pid);
 		}
 		if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
-			log_error("ABC failed with status %X", status);
+			log_error("ABC failed with status %X\n", status);
 		}
 		if (from_child_pipe >= 0)
 			close(from_child_pipe);
@@ -206,12 +206,12 @@ std::optional<AbcProcess> spawn_abc(const char* abc_exe, DeferredLogs &logs) {
 	// fork()s.
 	int to_child_pipe[2];
 	if (pipe2(to_child_pipe, O_CLOEXEC) != 0) {
-		logs.log_error("pipe failed");
+		logs.log_error("pipe failed\n");
 		return std::nullopt;
 	}
 	int from_child_pipe[2];
 	if (pipe2(from_child_pipe, O_CLOEXEC) != 0) {
-		logs.log_error("pipe failed");
+		logs.log_error("pipe failed\n");
 		return std::nullopt;
 	}
 
@@ -224,39 +224,39 @@ std::optional<AbcProcess> spawn_abc(const char* abc_exe, DeferredLogs &logs) {
 
 	posix_spawn_file_actions_t file_actions;
 	if (posix_spawn_file_actions_init(&file_actions) != 0) {
-		logs.log_error("posix_spawn_file_actions_init failed");
+		logs.log_error("posix_spawn_file_actions_init failed\n");
 		return std::nullopt;
 	}
 
 	if (posix_spawn_file_actions_addclose(&file_actions, to_child_pipe[1]) != 0) {
-		logs.log_error("posix_spawn_file_actions_addclose failed");
+		logs.log_error("posix_spawn_file_actions_addclose failed\n");
 		return std::nullopt;
 	}
 	if (posix_spawn_file_actions_addclose(&file_actions, from_child_pipe[0]) != 0) {
-		logs.log_error("posix_spawn_file_actions_addclose failed");
+		logs.log_error("posix_spawn_file_actions_addclose failed\n");
 		return std::nullopt;
 	}
 	if (posix_spawn_file_actions_adddup2(&file_actions, to_child_pipe[0], STDIN_FILENO) != 0) {
-		logs.log_error("posix_spawn_file_actions_adddup2 failed");
+		logs.log_error("posix_spawn_file_actions_adddup2 failed\n");
 		return std::nullopt;
 	}
 	if (posix_spawn_file_actions_adddup2(&file_actions, from_child_pipe[1], STDOUT_FILENO) != 0) {
-		logs.log_error("posix_spawn_file_actions_adddup2 failed");
+		logs.log_error("posix_spawn_file_actions_adddup2 failed\n");
 		return std::nullopt;
 	}
 	if (posix_spawn_file_actions_addclose(&file_actions, to_child_pipe[0]) != 0) {
-		logs.log_error("posix_spawn_file_actions_addclose failed");
+		logs.log_error("posix_spawn_file_actions_addclose failed\n");
 		return std::nullopt;
 	}
 	if (posix_spawn_file_actions_addclose(&file_actions, from_child_pipe[1]) != 0) {
-		logs.log_error("posix_spawn_file_actions_addclose failed");
+		logs.log_error("posix_spawn_file_actions_addclose failed\n");
 		return std::nullopt;
 	}
 
 	char arg1[] = "-s";
 	char* argv[] = { strdup(abc_exe), arg1, nullptr };
 	if (0 != posix_spawnp(&result.pid, abc_exe, &file_actions, nullptr, argv, environ)) {
-		logs.log_error("posix_spawnp %s failed (errno=%s)", abc_exe, strerror(errno));
+		logs.log_error("posix_spawnp %s failed (errno=%s)\n", abc_exe, strerror(errno));
 		return std::nullopt;
 	}
 	free(argv[0]);
@@ -1124,17 +1124,42 @@ void AbcModuleState::prepare_module(RTLIL::Design *design, RTLIL::Module *module
 	handle_loops(assign_map, module);
 }
 
+static bool is_abc_prompt(const std::string &line, std::string &rest) {
+	size_t pos = 0;
+	while (true) {
+		// The prompt may not start at the start of the line, because
+		// ABC can output progress and maybe other data that isn't
+		// newline-terminated.
+		size_t start = line.find("abc ", pos);
+		if (start == std::string::npos)
+			return false;
+		pos = start + 4;
+
+		size_t digits = 0;
+		while (pos + digits < line.size() && line[pos + digits] >= '0' && line[pos + digits] <= '9')
+			++digits;
+		if (digits < 2)
+			return false;
+		if (line.substr(pos + digits, 2) == "> ") {
+			rest = line.substr(pos + digits + 2);
+			return true;
+		}
+	}
+}
+
 bool read_until_abc_done(abc_output_filter &filt, int fd, DeferredLogs &logs) {
 	std::string line;
 	char buf[1024];
+	bool seen_source_cmd = false;
+	bool seen_yosys_abc_done = false;
 	while (true) {
 		int ret = read(fd, buf, sizeof(buf) - 1);
 		if (ret < 0) {
-			logs.log_error("Failed to read from ABC, errno=%d", errno);
+			logs.log_error("Failed to read from ABC, errno=%d\n", errno);
 			return false;
 		}
 		if (ret == 0) {
-			logs.log_error("ABC exited prematurely");
+			logs.log_error("ABC exited prematurely\n");
 			return false;
 		}
 		char *start = buf;
@@ -2844,4 +2869,4 @@ struct AbcPass : public Pass {
 	}
 } AbcPass;
 
-PRIVATE_NAMESPACE_END
\ No newline at end of file
+PRIVATE_NAMESPACE_END