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coverage tweaks

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* handle new 6g shift sequence
* assume 6.out

R=r
DELTA=24  (20 added, 0 deleted, 4 changed)
OCL=19593
CL=19596
This commit is contained in:
Russ Cox 2008-11-19 12:51:25 -08:00
parent cf9b7f7534
commit 692a5dbb9e
1 changed files with 24 additions and 4 deletions
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28
src/cmd/cov/main.c
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@ -21,7 +21,7 @@ typedef struct Ureg Ureg;
void
usage(void)
{
fprint(2, "usage: cov 6.out [-lv] [-g regexp] [args...]\n");
fprint(2, "usage: cov [-lv] [-g regexp] [6.out args...]\n");
fprint(2, "-g specifies pattern of interesting functions or files\n");
exits("usage");
}
@ -162,7 +162,7 @@ missing(uvlong pc, uvlong epc)
if(epc - pc == 2 || epc -pc == 3) {
// check for XORL inside shift.
// (on x86 have to implement large shift with explicit zeroing).
// (on x86 have to implement large left or unsigned right shift with explicit zeroing).
// f+90 0x00002c9f CMPL CX,$20
// f+93 0x00002ca2 JCS f+97(SB)
// f+95 0x00002ca4 XORL AX,AX <<<
@ -183,6 +183,24 @@ missing(uvlong pc, uvlong epc)
}
}
if(epc - pc == 3) {
// check for SAR inside shift.
// (on x86 have to implement large signed right shift as >>31).
// f+36 0x00016216 CMPL CX,$20
// f+39 0x00016219 JCS f+3e(SB)
// f+3b 0x0001621b SARL $1f,AX <<<
// f+3e 0x0001621e SARL CL,AX
// f+40 0x00016220 XORL CX,CX
// f+42 0x00016222 CMPL CX,AX
buf[0] = 0;
machdata->das(text, pc, 0, buf, sizeof buf);
if(strncmp(buf, "SAR", 3) == 0) {
machdata->das(text, epc, 0, buf, sizeof buf);
if(strncmp(buf, "SAR", 3) == 0)
return;
}
}
// show first instruction to make clear where we were.
machdata->das(text, pc, 0, buf, sizeof buf);
@ -379,8 +397,10 @@ main(int argc, char **argv)
getwd(cwd, sizeof cwd);
ncwd = strlen(cwd);
if(argc < 1)
usage();
if(argc == 0) {
*--argv = "6.out";
argc++;
}
fd = open(argv[0], OREAD);
if(fd < 0)
sysfatal("open %s: %r", argv[0]);