From: Brian Foley Date: Thu, 5 Sep 2019 08:50:13 +0000 (+0200) Subject: dc: Fix segfault when executing strings generated using asciify X-Git-Tag: 1_31_1~8 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=50ba92128b0a6472a3a85efaaa8ce3bfbda1bce5;p=oweals%2Fbusybox.git dc: Fix segfault when executing strings generated using asciify function old new delta zxc_vm_process 6884 6891 +7 Signed-off-by: Brian Foley Signed-off-by: Denys Vlasenko --- diff --git a/miscutils/bc.c b/miscutils/bc.c index 9a9880706..44c70cac3 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c @@ -4973,7 +4973,9 @@ static void dc_parse_string(void) xc_parse_pushInst_and_Index(XC_INST_STR, len); bc_vec_push(&G.prog.strs, &str); - // Explanation needed here + // Add an empty function so that if zdc_program_execStr ever needs to + // parse the string into code (from the 'x' command) there's somewhere + // to store the bytecode. xc_program_add_fn(); p->func = xc_program_func(p->fidx); @@ -6398,7 +6400,11 @@ static BC_STATUS zdc_program_asciify(void) str = xzalloc(2); str[0] = c; //str[1] = '\0'; - already is - bc_vec_push(&G.prog.strs, &str); + idx = bc_vec_push(&G.prog.strs, &str); + // Add an empty function so that if zdc_program_execStr ever needs to + // parse the string into code (from the 'x' command) there's somewhere + // to store the bytecode. + xc_program_add_fn(); dup: res.t = XC_RESULT_STR; res.d.id.idx = idx; diff --git a/testsuite/dc.tests b/testsuite/dc.tests index f74e3f0f5..1fc13c201 100755 --- a/testsuite/dc.tests +++ b/testsuite/dc.tests @@ -54,6 +54,11 @@ testing "dc: x should not execute or pop non-strings" \ "42\n" \ "" "" +testing "dc: x should work with strings created from a" \ + "dc -e'42 112 a x'" \ + "42\n" \ + "" "" + testing "dc read" \ "dc -finput" \ "2\n9\n1\n" \